JPH078915B2 - Method for removing volatiles from thermoplastic polymers - Google Patents
Method for removing volatiles from thermoplastic polymersInfo
- Publication number
- JPH078915B2 JPH078915B2 JP17597987A JP17597987A JPH078915B2 JP H078915 B2 JPH078915 B2 JP H078915B2 JP 17597987 A JP17597987 A JP 17597987A JP 17597987 A JP17597987 A JP 17597987A JP H078915 B2 JPH078915 B2 JP H078915B2
- Authority
- JP
- Japan
- Prior art keywords
- pellet
- mixed fluid
- volatile substance
- water
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920001169 thermoplastic Polymers 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 15
- 239000003039 volatile agent Substances 0.000 title description 9
- 239000008188 pellet Substances 0.000 claims description 150
- 239000000126 substance Substances 0.000 claims description 81
- 239000012530 fluid Substances 0.000 claims description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000011261 inert gas Substances 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 21
- 229920001038 ethylene copolymer Polymers 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- RBCSSAWYWYRREH-UHFFFAOYSA-N 3-propoxypropanenitrile Chemical compound CCCOCCC#N RBCSSAWYWYRREH-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ethylene, propylene, 1-butene Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は揮発性物質を含有する熱可塑性重合体ペレツト
から揮発性物質を除去する方法に関する。TECHNICAL FIELD The present invention relates to a method for removing volatile substances from a thermoplastic polymer pellet containing the volatile substances.
より詳細には、本発明は溶媒、未反応の単量体その他の
揮発性物質を含有するオレフイン系重合体などの熱可塑
性重合体ペレツトから揮発性物質を除去する方法に関す
る。More particularly, the present invention relates to a method for removing volatiles from thermoplastic polymer pellets such as olefin polymers containing solvents, unreacted monomers and other volatiles.
固体ペレツトから残留揮発性物質を除去する方法は公知
である（特公昭54−230号公報）。A method for removing residual volatile substances from solid pellets is known (Japanese Patent Publication No. 54-230).
該公報は水の表面皮膜を有する湿潤した固体ペレツトに
水蒸気を接触させて固体ペレツトから残留揮発性物質を
除去する方法を開示している。The publication discloses a method of removing residual volatiles from a solid pellet by contacting the wet pellet with water vapor with water vapor.
しかしながら上記方法ではペレツトが最初から水の表面
皮膜を有するため吸込まれた水蒸気がペレツトと接触す
ると水蒸気の温度は急速に低下する。この温度低下を補
償するためにたとえば吸込む水蒸気の温度をより高温に
することが必要となる。However, in the above method, since the pellet has a surface film of water from the beginning, the temperature of the steam is rapidly lowered when the sucked steam comes into contact with the pellet. In order to compensate for this temperature decrease, it is necessary to raise the temperature of the steam to be sucked in, for example.
しかし高温の水蒸気を比較的低い粘着温度を有する熱可
塑性重合体ペレツトに吸込むと吸込口付近で熱可塑性重
合体ペレツトが溶融あるいは粘着してブロツキングが起
る。一方、粘着温度以下の水蒸気を吸込むと、ペレツト
の溶融あるいは粘着は起らないが、水の表面皮膜を有す
るペレツトとの接触によつて起る温度低下のため、揮発
性物質の除去速度が遅くなり除去効率が低下する。However, when high temperature steam is sucked into a thermoplastic polymer pellet having a relatively low sticking temperature, the thermoplastic polymer pellet is melted or sticks near the suction port to cause blocking. On the other hand, if water vapor below the sticking temperature is inhaled, melting or sticking of the pellet does not occur, but the temperature decreases due to contact with the pellet having a water surface film, so the removal rate of volatile substances is slow. Therefore, the removal efficiency decreases.
したがつて特公昭54−230号公報に開示されている方法
により熱可塑性重合体ペレツトからペレツトのブロツキ
ングを起すことなく効率よく揮発性物質を除去すること
はできない。Therefore, the method disclosed in Japanese Patent Publication No. 54-230 cannot efficiently remove volatile substances from thermoplastic polymer pellets without causing blocking of the pellets.
本発明は揮発性物質を含有する熱可塑性重合体ペレツト
からペレツトのブロッキングを起すことなく効率よく揮
発性物質を除去する方法を提供することを目的とする。An object of the present invention is to provide a method for efficiently removing a volatile substance from a thermoplastic polymer pellet containing a volatile substance without causing blocking of the pellet.
前記目的は、本発明に従い、 実質的にバツクミキシングすることなく下方に移動する
揮発性物質を含有する少くとも最初は水の表面皮膜を有
しない熱可塑性重合体ペレツトと、該ペレツトの粘着温
度以下の温度を有する水蒸気、不活性気体および任意に
水を含有する混合流体とを、該ペレツトに含有されてい
る揮発性物質の量を所望の水準まで低下させるのに充分
な時間連続的にかつ向流的に接触させることを特徴とす
る熱可塑性重合体ペレツトから揮発性物質を除去する方
法により達成される。According to the invention, said object is to provide a thermoplastic polymer pellet containing at least initially a surface coating of water, which contains a volatile substance which migrates downward without substantial backmixing, and a sticking temperature of said pellet or less. A mixed fluid containing water vapor, an inert gas, and optionally water having a temperature of 10 .degree. C. continuously and for a time sufficient to reduce the amount of volatiles contained in the pellet to the desired level. It is achieved by a method of removing volatiles from a thermoplastic polymer pellet, which is characterized by fluidizing contact.
以下本発明について詳細に説明する。The present invention will be described in detail below.
本発明で用いる熱可塑性重合体は、その粘着温度を越え
ない温度で水蒸気、不活性気体たとえば窒素および任意
に水を含む混合流体に対して安定でありかつペレツト状
とすることができる熱可塑性重合体である。The thermoplastic polymer used in the present invention is a thermoplastic polymer which is stable to a mixed fluid containing water vapor, an inert gas such as nitrogen and optionally water at a temperature not exceeding its sticking temperature and can be made into a pellet. It is united.
かかる熱可塑性重合体の例として、エチレン重合体、エ
チレン系共重合体、プロピレン重合体、プロピレン系共
重合体、ブテン重合体、ブテン系共重合体、４−メチル
ペンテン−１重合体、４−メチルペンテン−１系共重合
体などのオレフイン重合体およびオレフイン系共重合体
を挙げることができる。Examples of such thermoplastic polymers include ethylene polymers, ethylene-based copolymers, propylene polymers, propylene-based copolymers, butene polymers, butene-based copolymers, 4-methylpentene-1 polymers, 4- Examples include olefin polymers such as methylpentene-1 type copolymers and olefin polymers.
本発明において熱可塑性重合体ペレツトの形状は、ペレ
ツトが積み重ねられたときに流体が通過しうるペレツト
間隙を形成するものであれば、球体状、楕円体状、柱
状、立方体状、板状、円筒状などいかなる形状であつて
もよい。In the present invention, the shape of the thermoplastic polymer pellets is spherical, ellipsoidal, columnar, cubical, plate-like, cylindrical as long as it forms a pellet gap through which fluid can pass when the pellets are stacked. It may have any shape such as a shape.
本発明において熱可塑性重合体ペレツトの大きさは、水
蒸気、下活性ガスおよび任意に水を含有する混合流体と
接触させたときに、該ペレツトが流動化しない程度の大
きさであることが必要である。また、ペレツトは揮発性
物質を効率よく除去するため表面積がある程度以上大き
いことが望ましい。この点からしてペレツトは大きすぎ
ないことが望ましい。In the present invention, the size of the thermoplastic polymer pellets is required to be such that the pellets do not fluidize when brought into contact with a mixed fluid containing steam, lower active gas and optionally water. is there. Further, it is desirable that the pellet has a large surface area to some extent in order to efficiently remove volatile substances. From this point of view, it is desirable that the pellet is not too large.
本発明において熱可塑性重合体ペレツトの好適な大きさ
は、該ペレツトを水蒸気、不活性ガスおよび任意に水を
含有する混合流体と接触させるときの条件に依つて変化
しうるので一概には言えないが、一般にはペレツトの平
均直径は１〜12mm、好ましくは1.5〜8mmであつてよい。The suitable size of the thermoplastic polymer pellets in the present invention cannot be generally stated because it can vary depending on the conditions when the pellets are contacted with a mixed fluid containing steam, an inert gas and optionally water. However, in general, the pellets may have an average diameter of 1 to 12 mm, preferably 1.5 to 8 mm.
本発明において使用するペレツトは、水蒸気、不活性気
体および任意に水を含有する混合流体と接触させる前は
実質的に乾燥しており、ペレツトの表面に水膜を有しな
いものである。The pellets used in the present invention are substantially dry before contact with a mixed fluid containing water vapor, an inert gas and optionally water, and have no water film on the surface of the pellets.
本発明における熱可塑性重合体中に含有される揮発性物
質には、重合反応時、重合体の後処理時たとえば精製時
および洗浄時などに使用された溶媒、たとえばブタン、
ペンタン、ヘキサン、シクロヘキサン、ベンゼン、トル
エン、メタノール、エタノール、イソプロピルアルコー
ル、アセトン、メチルエチルケトン、ジエチルエーテル
など、未反応の単量体、たとえばエチレン、プロピレ
ン、１−ブテン、４−メチル−１−ペンテン、１−ヘキ
セン、１−オクテン、スチレンなど並びに比較的低分子
量のオリゴマーたとえば二量体、三量体などが包含され
る。The volatile substance contained in the thermoplastic polymer in the present invention includes a solvent used during the polymerization reaction, the post-treatment of the polymer such as purification and washing, for example, butane.
Unreacted monomers such as pentane, hexane, cyclohexane, benzene, toluene, methanol, ethanol, isopropyl alcohol, acetone, methyl ethyl ketone, diethyl ether, such as ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1 -Hexene, 1-octene, styrene and the like as well as relatively low molecular weight oligomers such as dimers, trimers and the like.
本発明において揮発性物質を含有する熱可塑性重合体ペ
レツトは実質的にバツクミキシングすることなく下方に
移動する。ここで該ペレツトが実質的にバツクミキシン
グすることなく下方に移動するとは下方にあるペレツト
と上方にあるペレツトが実質的に混合しないような条件
下にペレツトが全体として下方に移動することを意味す
る。In the present invention, the volatile-containing thermoplastic polymer pellets move downward without substantial backmixing. Here, the downward movement of the pellets without substantially back mixing means that the entire pellets move downward under the condition that the lower pellets and the upper pellets do not substantially mix with each other. .
ペレツトが上下方向に混合すると、ペレツトが水蒸気、
不活性気体および任意に水を含有する混合流体と接触す
る時間がペレツト毎に大きく異なる可能性があるので、
バツクミキシングが起ることは好ましくない。If the pellets are mixed vertically, the pellets will become steam,
Since the time of contact with a mixed fluid containing an inert gas and optionally water can vary significantly from pellet to pellet,
It is not preferable that back mixing occurs.
本発明においては、揮発性物質を含有する熱可塑性重合
体ペレツトから揮発性物質を除去するのに、該ペレツト
の粘着温度以下の温度を有する混合流体を用いる。In the present invention, a mixed fluid having a temperature not higher than the sticking temperature of the pellet is used to remove the volatile substance from the thermoplastic polymer pellet containing the volatile substance.
混合流体が水蒸気および不活性気体から成るときは、該
混合流体の組成は、たとえば3kg/cm2の圧力および143℃
の温度を有する水蒸気1kgにつき不活性気体の量を0.12
〜8Nm3とすることができる。When the mixed fluid comprises water vapor and an inert gas, the composition of the mixed fluid is, for example, 3 kg / cm 2 pressure and 143 ° C.
The amount of inert gas is 0.12 per kg of water vapor having a temperature of
It can be ~ 8 Nm 3 .
また、混合流体が水蒸気、不活性気体および水から成る
ときは、混合流体の組成は、たとえば3kg/cm2の圧力お
よび143℃の温度を有する水蒸気1kgにつき、不活性気体
0.08〜6Nm3および水0.05〜2.5とすることができる。When the mixed fluid is composed of steam, an inert gas and water, the composition of the mixed fluid is, for example, 1 kg of steam having a pressure of 3 kg / cm 2 and a temperature of 143 ° C.
It can be 0.08-6 Nm 3 and water 0.05-2.5.
不活性気体たとえば窒素ガスを含有しない混合流体を用
いた場合、揮発性物質の除去速度は著しく小さくなる。When a mixed fluid containing no inert gas such as nitrogen gas is used, the removal rate of volatile substances is significantly reduced.
本発明において、水蒸気、不活性気体および水から成る
混合流体を用いる場合、ペレツトに吹込む混合流体の温
度を容易に調節することができ、このためペレツトの溶
融および粘着を避けつつペレツトの粘着温度以下の範囲
内で高い吸込み温度を使用することができる。In the present invention, when a mixed fluid consisting of water vapor, an inert gas and water is used, the temperature of the mixed fluid blown into the pellet can be easily adjusted. Therefore, the sticking temperature of the pellet can be avoided while avoiding melting and sticking of the pellet. High suction temperatures can be used within the following ranges.
水蒸気、不活性気体および水の混合流体が表面に水膜を
有しないペレツトに吸込れた場合、該混合流体の温度低
下は比較的小さい。When a mixed fluid of water vapor, an inert gas and water is sucked into a pellet having no water film on its surface, the temperature drop of the mixed fluid is relatively small.
本発明において水蒸気、不活性気体たとえば窒素ガスお
よび任意に水を含有する混合流体は下方に移動するペレ
ツトの下部付近でペレツトに吸込まれる。In the present invention, a mixed fluid containing water vapor, an inert gas such as nitrogen gas and optionally water is sucked into the pellet near the lower part of the pellet moving downward.
本発明においてペレツトに吸込む混合流体の温度は揮発
性物質を含有する熱可塑性重合体の粘着温度以下であ
る。ペレツトに吸込む混合流体の温度は、揮発性物質を
含有する熱可塑性重合体の粘着温度に依存し、熱可塑性
重合体がオレフィン重合体またはオレフィン系共重合体
の場合、一般には50〜130℃、好ましくは70〜110℃であ
ることができる。In the present invention, the temperature of the mixed fluid sucked into the pellet is lower than the sticking temperature of the thermoplastic polymer containing the volatile substance. The temperature of the mixed fluid sucked into the pellet depends on the sticking temperature of the thermoplastic polymer containing a volatile substance, and when the thermoplastic polymer is an olefin polymer or an olefin copolymer, it is generally 50 to 130 ° C. It may preferably be 70 to 110 ° C.
水蒸気、不活性気体および一部の水はペレツトの間隙を
ぬつて上方へ移動する。水はたとえば霧状で水蒸気と不
活性気体とから成る混合流体に随伴されて上方へ運ばれ
ることができる。Water vapor, inert gas and some water move up through the gaps in the pellet. Water can be carried upward, for example in the form of a mist, accompanied by a mixed fluid of water vapor and an inert gas.
本発明においてペレツトが混合流体と接触すると、ペレ
ツト中に含有されていた揮発物質の一部または実質的に
全部がペレツトから離脱して混合流体中へ移行する。In the present invention, when the pellet comes into contact with the mixed fluid, a part or substantially all of the volatile substances contained in the pellet are released from the pellet and are transferred into the mixed fluid.
ペレツトと混合流体との接触時間は、該ペレツトに含有
されている揮発性物質の量を所望の水準まで低下させる
のに充分な時間である。接触時間は一般に１〜30時間、
好ましくは４〜24時間であることができる。The contact time between the pellet and the mixed fluid is sufficient to reduce the amount of volatiles contained in the pellet to the desired level. Contact time is generally 1 to 30 hours,
It can be preferably 4 to 24 hours.
上記接触時間は、たとえばペレツトの下方への移動速度
および混合流体の吸込み量を調節することによつて調節
することができる。The contact time can be adjusted, for example, by adjusting the downward moving speed of the pellet and the suction amount of the mixed fluid.
該ペレツトから除去された揮発性物質、たとえばヘキサ
ンもまた気体状、霧状などの状態で水蒸気と不活性気体
との混合気体に運ばれて系外へ出ることができる。Volatile substances, such as hexane, removed from the pellets can also be carried in a gaseous or mist state to a mixed gas of water vapor and an inert gas and exit the system.
系外へ運ばれた揮発性物質は所望により公知の手段で回
収することができる。The volatile substances carried out of the system can be recovered by known means, if desired.
所望の温度の水蒸気および不活性気体の混合流体は、た
とえば所定の温度および圧力を有する水蒸気に所定の温
度および圧力を有する不活性ガスを所定の割合で混合す
ることにより得ることができる。A mixed fluid of steam and an inert gas at a desired temperature can be obtained, for example, by mixing steam having a predetermined temperature and pressure with an inert gas having a predetermined temperature and pressure at a predetermined ratio.
また所望の温度の水蒸気、不活性気体および水の混合流
体は、たとえば使用する水蒸気および不活性気体の温
度、圧力および量に依存して所定の量および温度の水を
加えることにより得ることができる。水蒸気、不活性気
体および水はいかなる順序で混合してもよく、たとえば
所定の温度、圧力および量の水蒸気に所定の温度および
量の水を加え、さらに所定の温度、圧力および量の不活
性気体、たとえば窒素ガスを加えて所望の温度の混合流
体を得ることができる。A mixed fluid of steam, an inert gas and water at a desired temperature can be obtained by adding water of a predetermined amount and temperature depending on, for example, the temperature, pressure and amount of the steam and inert gas used. . The steam, the inert gas and the water may be mixed in any order, for example, water having a predetermined temperature, pressure and amount and water having a predetermined temperature and amount are added, and further, an inert gas having a predetermined temperature, pressure and amount is further added. For example, nitrogen gas can be added to obtain a mixed fluid at a desired temperature.
以上説明した方法により当業者は所望の範囲の温度を有
する混合流体を容易に得ることができる。Those skilled in the art can easily obtain a mixed fluid having a temperature in a desired range by the method described above.
使用する水蒸気、不活性気体（窒素ガス）および水の温
度、圧力および量と得られる混合流体の温度との関係を
第１図に例示する。FIG. 1 illustrates the relationship between the temperature, pressure and amount of water vapor, inert gas (nitrogen gas) and water used and the temperature of the resulting mixed fluid.
第１図は3kg/cm2ゲージ圧の水蒸気（3S）の量、窒素ガ
ス（N2）の量および水の量と水蒸気、窒素ガスおよび水
から成る混合流体の温度との関係を示す。3kg/cm2ゲー
ジ圧の水蒸気の温度は143℃である。FIG. 1 shows the relationship between the amount of steam (3S), the amount of nitrogen gas (N 2 ) and the amount of water at 3 kg / cm 2 gauge pressure, and the temperature of the mixed fluid composed of steam, nitrogen gas and water. The temperature of steam at 3 kg / cm 2 gauge pressure is 143 ° C.
第１図より水蒸気、窒素ガスおよび水の温度、圧力およ
び量を調節することにより所望の温度を有する混合流体
を得ることができることがわかる。It can be seen from FIG. 1 that a mixed fluid having a desired temperature can be obtained by adjusting the temperature, pressure and amount of water vapor, nitrogen gas and water.
以下本発明をさらに具体的に説明する。The present invention will be described in more detail below.
ヘキサンその他の揮発性物質を含有するエチレン重合体
ペレツトから揮発性物質を除去する実験を行つた。Experiments were conducted to remove volatiles from ethylene polymer pellets containing hexane and other volatiles.
（Ａ） 実験装置 本実験に用いた装置の概略を第２図に示す。(A) Experimental device The outline of the device used in this experiment is shown in FIG.
本装置はサイクロン１、揮発性物質除去塔２、ペレツト
送入管３、混合流体供給管４、ペレツト取出管５および
ペレツト取出量制御バルブ51を有した。This apparatus has a cyclone 1, a volatile substance removing tower 2, a pellet inlet pipe 3, a mixed fluid supply pipe 4, a pellet outlet pipe 5, and a pellet outlet amount control valve 51.
サイクロン１はペレツト受入開口部11、ペレツト送出開
口部12および気体放出開口部13を有した。The cyclone 1 had a pellet receiving opening 11, a pellet sending opening 12 and a gas discharge opening 13.
サイクロン１は、ペレツト受入開口部（サイクロンの入
口管径）240mm、サイクロン円筒部直径900mm、ペレツト
送出開口部700mm、サイクロンの気体放出開口部600mm、
全高2300mmの大きさを有しており、形状は一般的に使用
される液体サイクロンと同様の形状のものである。Cyclone 1 has a pellet receiving opening (cyclone inlet pipe diameter) 240 mm, a cyclone cylinder diameter 900 mm, a pellet sending opening 700 mm, a cyclone gas discharge opening 600 mm,
It has a total height of 2300 mm and its shape is similar to that of a commonly used hydrocyclone.
揮発性物質除去塔２は上部円錐状部分21、中央円筒状部
分22および下部逆円錐状部分23からなり、ペレツト受入
開口部24、ペレツト水準検出器25、混合流体導入部26お
よびペレツト取出開口部27を有した。The volatile substance removal tower 2 comprises an upper conical portion 21, a central cylindrical portion 22 and a lower inverted conical portion 23, and has a pellet receiving opening 24, a pellet level detector 25, a mixed fluid introducing portion 26 and a pellet extracting opening. Had 27.
揮発性物質除去塔２は高さが11500mm、中央円筒状部分2
2の直径が4000mm、上部円錐状部分21の開口角（第２図
における角α）が約140度、下部逆円錐状部分23の開口
角（第２図における角β）が約90度であつた。The volatile substance removal tower 2 has a height of 11500 mm and a central cylindrical portion 2
2 has a diameter of 4000 mm, the opening angle of the upper conical portion 21 (angle α in FIG. 2) is about 140 degrees, and the opening angle of the lower inverted conical portion 23 (angle β in FIG. 2) is about 90 degrees. It was
揮発性物質除去塔２は上部円錐状部分21の上端にあるペ
レツト受入開口部24でサイクロン１のペレツト送出開口
部12と連通して接続されていた。The volatile matter removal tower 2 was connected in communication with the pellet delivery opening 12 of the cyclone 1 at a pellet receiving opening 24 at the upper end of the upper conical portion 21.
また、揮発性物質除去塔２は下部逆円錐状部分23の下端
にあるペレツト取出開口部27でペレツト取出管５と連通
して接続されていた。The volatile substance removing tower 2 was connected to the pellet discharge pipe 5 at the pellet discharge opening 27 at the lower end of the lower inverted conical portion 23.
ペレツト取出管５にはペレツト取出量を制御するための
ペレツト取出量制御バルブ51が取付けられていた。The pellet take-out pipe 5 was provided with a pellet take-out amount control valve 51 for controlling the pellet take-out amount.
ペレツト取出量制御バルブ51は揮発性物質除去塔２に取
付けたペレツト水準検出器25からの信号に基いて揮発性
物質除去塔２におけるペレツト水準を所定の範囲に維持
するように制御した。The pellet extraction amount control valve 51 was controlled based on a signal from a pellet level detector 25 attached to the volatile substance removing tower 2 so as to maintain the pellet level in the volatile substance removing tower 2 within a predetermined range.
（Ｂ） 実験操作 上記装置を用いて揮発性物質を含有するエチレン重合体
ペレツトから揮発性物質を除去する実験を下記の一般的
に手順により行なつた。(B) Experimental operation An experiment for removing a volatile substance from an ethylene polymer pellet containing a volatile substance by using the above-mentioned apparatus was conducted by the following general procedure.
揮発性物質を含有するエチレン重合体ペレツトをペレツ
ト送入管３を通じて空気輸送してサイクロン１のペレツ
ト受入開口部11からサイクロン１に導入した。An ethylene polymer pellet containing a volatile substance was pneumatically transported through the pellet feed pipe 3 and introduced into the cyclone 1 through the pellet receiving opening 11 of the cyclone 1.
空気輸送されたペレツトはサイクロン１によりペレツト
と空気に分離しペレツトはペレツト送出開口部12を経て
揮発性物質除去塔２へ送り空気は気体放出開口部13から
放出した。The pellets transported by air were separated into pellets and air by the cyclone 1, and the pellets were sent to the volatile substance removing tower 2 through the pellet delivery opening 12 and the air was released from the gas release opening 13.
揮発性物質除去塔２へ移送されたペレツトは揮発性物質
除去塔２の中で所定の水準まで堆積させた後、実質的に
バツクミキシングが起らない条件で重力により下方に移
動させ、揮発性物質除去塔２の下部逆円錐状部分23の下
端にあるペレツト取出開口部27を経てペレツト取出管５
へ移動させ、ペレツト取出量制御バルブ51を経て取出し
た。After the pellets transferred to the volatile substance removing tower 2 are deposited to a predetermined level in the volatile substance removing tower 2, they are moved downward by gravity under the condition that backmixing does not substantially occur, and the pellets are volatile. The pellet extraction pipe 5 is passed through the pellet extraction opening 27 at the lower end of the lower inverted conical portion 23 of the substance removal tower 2.
And was taken out through the pellet take-out amount control valve 51.
揮発性物質除去塔２へ導入するペレツトの量と揮発性物
質除去塔２から取出すペレツトの量は実質的に同じにな
るようにペレツト取出量制御バルブ51により制御した。
ペレツト取出量制御バルブ51はペレツト水準検出器25か
らの信号により制御した。The amount of pellets introduced into the volatile substance removing tower 2 and the amount of pellets taken out from the volatile substance removing tower 2 were controlled by the pellet discharge amount control valve 51 so as to be substantially the same.
The pellet extraction amount control valve 51 was controlled by a signal from the pellet level detector 25.
所定の温度、圧力および量の水蒸気（3kg/cm2 G）、窒
素ガスおよび水（ボイラー水）からなる混合流体を混合
流体供給管４を経て混合流体導入部26から揮発性物質除
去塔２へ吹込んだ。A mixed fluid consisting of water vapor (3 kg / cm 2 G), nitrogen gas and water (boiler water) at a predetermined temperature, pressure and amount is passed from the mixed fluid introduction part 26 to the volatile substance removal tower 2 through the mixed fluid supply pipe 4. I blew in.
ペレツト間隙を上昇しサイクロン１へ入つてきた揮発性
物質を含有する混合流体はサイクロン１の気体放出開口
部13から放出した。The mixed fluid containing the volatile substances that has entered the cyclone 1 after moving up the pellet gap is discharged from the gas discharge opening 13 of the cyclone 1.
（Ｃ） 分析方法 エチレン重合体ペレツト中のヘキサンの量および全揮発
性物質の量は下記の方法に従つて求めた。(C) Analytical method The amount of hexane and the amount of total volatile substances in the ethylene polymer pellet were determined according to the following method.
すなわち、ヘキサンの定量については下記の方法により
行つた。That is, quantification of hexane was performed by the following method.
10gの重合体ペレツトを20mlのトルエン中に浸析し、密
封下、70℃にて２時間振とうして、ペレツト中に残留す
るヘキサンを抽出する。10 g of the polymer pellet is dipped in 20 ml of toluene and shaken at 70 ° C. for 2 hours under a sealed condition to extract hexane remaining in the pellet.
トルエン中に抽出されたヘキサン分を12％1,2,3−Tris
（２−cyanoethoxy）propaneを液相とした分離カラムを
用いてガスクロマトグラフ法により定量した。Hexane content extracted in toluene was 12% 1,2,3-Tris
It quantified by the gas chromatographic method using the separation column which made (2-cyanoethoxy) propane the liquid phase.
また、全揮発性物質の定量は、真空乾燥器を用いて重合
体ペレツトを減圧下190℃にて１時間加熱し、その減量
より求めた。The amount of all volatile substances was determined by heating the polymer pellets under reduced pressure at 190 ° C. for 1 hour using a vacuum dryer, and determining the weight loss.
揮発分としては水分、残留溶剤、極低分子量ポリマー
（低分子量オリゴマー）などが含まれる。Volatile components include water, residual solvent, extremely low molecular weight polymer (low molecular weight oligomer), and the like.
上記実験装置および操作方法を用いて行なつた実験およ
び結果を以下に記載する。The experiments and results conducted using the above experimental apparatus and operating method are described below.
実施例１ 第２図に示す揮発性物質除去装置を用いて、ヘキサン等
の揮発性物質を含有するエチレン系共重合体ペレツトか
ら揮発性物質を除去する実験を下記の手順により行なつ
た。Example 1 An experiment for removing a volatile substance from an ethylene-based copolymer pellet containing a volatile substance such as hexane was carried out by the following procedure using the volatile substance removing apparatus shown in FIG.
揮発性物質を含有するMFR2.1g/10分、密度0.923g/cm3、
融点117℃のエチレン系共重合体ペレツトをペレツト送
入管３を通じて空気輸送してサイクロン１のペレツト受
入開口部11からサイクロン１に5.0T/Hで導入した。MFR 2.1g / 10 minutes containing volatile substance, density 0.923g / cm 3 ,
An ethylene copolymer pellet having a melting point of 117 ° C. was pneumatically transported through the pellet inlet pipe 3 and introduced into the cyclone 1 at 5.0 T / H from the pellet receiving opening 11 of the cyclone 1.
空気輸送されたペレツトはサイクロン１によりペレツト
と空気に分離し、ペレツトは揮発性物質除去塔２へ送
り、空気は気体放出開口部13から放出した。The pellets transported by air were separated into pellets and air by the cyclone 1, the pellets were sent to the volatile substance removal tower 2, and the air was discharged from the gas discharge opening 13.
揮発性物質除去塔２へ移送されたペレツトは揮発性物質
除去塔２の中で所定の水準まで堆積させ平均滞留時間８
時間となるよう揮発性物質除去塔２のペレツト水準検出
器25を用いてペレツト取出量制御バルブ51により制御し
て取出した。The pellets transferred to the volatile substance removing tower 2 are accumulated to a predetermined level in the volatile substance removing tower 2 and the average residence time is 8
The pellet level detector 25 of the volatile substance removal tower 2 was used so that the time was reached, and the pellet volume was controlled by the pellet volume control valve 51.
この時3kg/cm2の水蒸気を800kg/Hr、水100/Hr窒素700
Nm3/Hr、温度95℃の混合流体を混合流体供給管４を経て
混合流体導入部26から揮発性物質除去塔２へ吹込んだ。At this time, 3 kg / cm 2 of water vapor is 800 kg / Hr, water 100 / Hr nitrogen 700
A mixed fluid of Nm 3 / Hr and a temperature of 95 ° C. was blown into the volatile substance removal tower 2 from the mixed fluid introduction section 26 through the mixed fluid supply pipe 4.
ペレツト間隙を上昇しサイクロン１へ入つてきた揮発性
物質を含有する混合流体はサイクロン１の気体放出開口
部13から放出した。The mixed fluid containing the volatile substances that has entered the cyclone 1 after moving up the pellet gap is discharged from the gas discharge opening 13 of the cyclone 1.
上記の操作によりエチレン系共重合体ペレツト中の揮発
性成分は下記のように効率よく除去された。By the above operation, the volatile components in the ethylene copolymer pellet were efficiently removed as described below.
実施例２ 実施例１と同じ設備を用いて揮発性物質を含有する実施
例１と同じ物性のエチレン系共重合体ペレツトを用いて
実施例１と同様の方法にて揮発性物質の除去を行なつ
た。 Example 2 A volatile substance was removed in the same manner as in Example 1 by using the same equipment as in Example 1 and using an ethylene copolymer pellet having the same physical properties as in Example 1 containing a volatile substance. Natsuta.
揮発性物質除去塔２へはサイクロン１を経由してエチレ
ン系共重合体ペレツトを5T/Hの供給速度で導入し、揮発
性物質除去塔２の中で所定の水準まで堆積させ、平均滞
留時間８時間となるようペレツト取出量制御バルブ51に
より制御して取出した。The ethylene-based copolymer pellets were introduced into the volatile substance removal tower 2 via the cyclone 1 at a feed rate of 5 T / H, and were deposited to a predetermined level in the volatile substance removal tower 2, and the average residence time was The pellet was taken out by controlling the pellet take-out amount control valve 51 for 8 hours.
この時3kg/cm2 Gの水蒸気を800kg/Hr、水100/Hr、窒
素300Nm3/Hr、温度102℃の混合流体を混合流体供給管４
を経て混合流体導入部26から揮発性物質除去塔２へ吹込
んだ。At this time, 800 kg / Hr of steam of 3 kg / cm 2 G, 100 / Hr of water, 300 Nm 3 / Hr of nitrogen, and a mixed fluid of temperature 102 ° C are mixed fluid supply pipes 4
Then, it was blown into the volatile substance removal tower 2 from the mixed fluid introducing part 26.
揮発性物質を含有する混合流体は実施例１同様サイクロ
ン１の気体放出開口部13から放出した。The mixed fluid containing a volatile substance was discharged from the gas discharge opening 13 of the cyclone 1 as in Example 1.
上記の操作によりエチレン系共重合体ペレツト中の揮発
性成分は下記のように効率よく除去された。By the above operation, the volatile components in the ethylene copolymer pellet were efficiently removed as described below.
実施例３ 実施例１と同じ設備を用いて、揮発性物質を含有するMF
R2.4g/10分、密度0.909g/cm3、融点101℃、のエチレン
系共重合体ペレツトから実施例１と同様の方法にて揮発
性物質の除去を行なつた。 Example 3 Using the same equipment as in Example 1, MF containing volatile substances
Volatile substances were removed in the same manner as in Example 1 from an ethylene copolymer pellet having R of 2.4 g / 10 minutes, density of 0.909 g / cm 3 , and melting point of 101 ° C.
揮発性物質除去塔２へは上記エチレン系共重合体ペレツ
トをサイクロン１を経由して5T/Hで導入し、揮発性物質
除去塔２の中で所定の水準まで堆積させ、平均滞留時間
12時間となるようペレツト取出量制御バルブ51により制
御して取出した。The above ethylene-based copolymer pellets were introduced into the volatile substance removal tower 2 at a rate of 5 T / H via the cyclone 1 and were deposited to a predetermined level in the volatile substance removal tower 2, and the average residence time was
The pellet was taken out by controlling the pellet take-out amount control valve 51 so that it would be 12 hours.
この時3kg/cm2 Gの水蒸気300kg/Hr、水100/Hr、窒素5
00Nm3/Hr、温度85℃の混合流体を混合流体供給管４を経
て混合流体導入部26から揮発性物質除去塔２へ吹込ん
だ。At this time, 300 kg / Hr of water vapor of 3 kg / cm 2 G, 100 / Hr of water, 5 nitrogen
A mixed fluid of 00 Nm 3 / Hr and a temperature of 85 ° C. was blown into the volatile substance removal tower 2 from the mixed fluid introduction part 26 through the mixed fluid supply pipe 4.
揮発性物質を含有する混合流体は実施例１と同様サイク
ロン１の気体放出開口部13から放出した。The mixed fluid containing a volatile substance was discharged from the gas discharge opening 13 of the cyclone 1 as in Example 1.
上記の操作によりエチレン系共重合体ペレツト中の揮発
性成分は下記のように効率よく除去された。By the above operation, the volatile components in the ethylene copolymer pellet were efficiently removed as described below.
実施例４ 実施例１と同じ設備を用いて揮発性物質を含有する実施
例３と同じ物性のエチレン系共重合体ペレツトを用いて
実施例１と同様の方法にて揮発性物質の除去を行なつ
た。 Example 4 A volatile substance was removed in the same manner as in Example 1 by using the same equipment as in Example 1 but using a volatile substance-containing ethylene copolymer pellet having the same physical properties as in Example 3. Natsuta.
揮発性物質除去塔２へは上記エチレン系共重合体ペレツ
トをサイクロン１を経由して5T/Hで導入し、揮発性物質
除去塔２の中で所定の水準まで堆積させ平均滞留時間12
時間となるようペレツト取出量制御バルブ51により制御
して取出した。この時3kg/cm2 Gの水蒸気300kg/Hr、水1
00/Hr、窒素200Nm3/Hr、温度91℃の混合流体を混合流
体供給管４を経て混合流体導入部26から揮発性物質除去
塔２へ吹込んだ。The above ethylene-based copolymer pellets were introduced into the volatile substance removal tower 2 at a rate of 5 T / H via the cyclone 1, and were accumulated to a predetermined level in the volatile substance removal tower 2 and the average residence time 12
The pellet was taken out by controlling the pellet take-out amount control valve 51 so that the time was reached. At this time, 3 kg / cm 2 G steam 300 kg / Hr, water 1
A mixed fluid of 00 / Hr, 200 Nm 3 / Hr of nitrogen, and a temperature of 91 ° C. was blown into the volatile substance removal tower 2 from the mixed fluid introduction section 26 through the mixed fluid supply pipe 4.
揮発性物質を含有する混合流体は実施例１と同様サイク
ロン１の気体放出開口部13から放出した。The mixed fluid containing a volatile substance was discharged from the gas discharge opening 13 of the cyclone 1 as in Example 1.
上記の操作によりエチレン系共重合体ペレツト中の揮発
性成分は下記のように効率よく除去された。By the above operation, the volatile components in the ethylene copolymer pellet were efficiently removed as described below.
比較例１ 実施例１と同じ設備を用いて揮発性物質を含有する実施
例１と同じ物性のエチレン系共重合体ペレツトを用いて
揮発性物質の除去を行なつた。 Comparative Example 1 Using the same equipment as in Example 1, the volatile substance was removed using the ethylene copolymer pellet containing the volatile substance and having the same physical properties as in Example 1.
実施例１と同様エチレン系共重合体ペレツトをサイクロ
ン１を通して揮発性物質除去塔２へ5.0T/Hで導入し、揮
発性物質除去塔２での平均滞留時間が８時間となるよう
ペレツト水準検出器25を用いてペレツト取出量制御バル
ブ51により制御して取出した。In the same manner as in Example 1, the ethylene copolymer pellet was introduced into the volatile substance removing tower 2 at 5.0 T / H through the cyclone 1, and the pellet level was detected so that the average residence time in the volatile substance removing tower 2 was 8 hours. The device 25 was used to control and take out the pellet take-out amount control valve 51.
この時3kg/cm2 Gの水蒸気を800kg/Hr、水200/Hr、温
度102℃の窒素を含まない混合流体を混合流体供給管４
を経て混合流体導入部26から揮発性物質除去塔２へ吹込
み、実施例１と同様、エチレン系共重合体ペレツト中の
揮発性成分の除去を行なつた。At this time, 800 kg / Hr of steam of 3 kg / cm 2 G, 200 / Hr of water, and a mixed fluid not containing nitrogen having a temperature of 102 ° C. of a mixed fluid supply pipe 4
Then, the mixture was introduced into the volatile substance removing tower 2 through the mixed fluid introducing section 26, and the volatile components in the ethylene copolymer pellet were removed in the same manner as in Example 1.
この結果、下記のように、実施例１に比較して著しく揮
発性成分の含有量が多かつた。As a result, as shown below, the content of volatile components was remarkably large as compared with Example 1.
比較例２ 実施例１と同じ設備を用いて揮発性物質を含有する実施
例３と同じ物性のエチレン系共重合体ペレツトを用いて
揮発性物質の除去を行なつた。 Comparative Example 2 Using the same equipment as in Example 1, the volatile substance was removed using the ethylene copolymer pellet having the same physical properties as in Example 3 containing the volatile substance.
実施例３と同様エチレン系共重合体ペレツトをサイクロ
ン１を通して揮発性物質除去塔２へ5.0T/Hで導入し、揮
発性物質除去塔２での平均滞留時間が12時間となるよう
ペレツト取出量制御バルブ51により制御して取出した。In the same manner as in Example 3, the ethylene copolymer pellets were introduced into the volatile substance removal tower 2 at 5.0 T / H through the cyclone 1 so that the average retention time in the volatile substance removal tower 2 was 12 hours. It was taken out under the control of the control valve 51.
この時3kg/cm2 Gの水蒸気300kg/Hr、水300/Hr、温度9
1℃の窒素を含まない混合流体を混合流体供給管４を経
て混合流体導入部26から揮発性物質除去塔２へ吹込み実
施例２と同様、エチレン系共重合体ペレツト中の揮発性
成分の除去を行なつた。At this time, 3 kg / cm 2 G of steam 300 kg / Hr, water 300 / Hr, temperature 9
A nitrogen-free mixed fluid at 1 ° C. was blown into the volatile substance removal tower 2 from the mixed fluid introducing portion 26 through the mixed fluid supply pipe 4, and the volatile components in the ethylene copolymer pellets were mixed in the same manner as in Example 2. It was removed.
この結果、下記のように実施例２に比較して著しく揮発
性成分の含有量が多かつた。As a result, the content of volatile components was remarkably large as compared with Example 2 as described below.
〔発明の効果〕 本発明によれば、揮発性物質を含有する熱可塑性重合体
からペレツトのブロツキングを起すことなく効率よく揮
発性物質を除去することができる。 EFFECTS OF THE INVENTION According to the present invention, the volatile substance can be efficiently removed from the thermoplastic polymer containing the volatile substance without causing blocking of pellets.
第１図は3kg/cm2のゲージ圧の水蒸気（3S）窒素ガス（N
2）および水の量とこれらを混合して得られる混合流体
の温度との関係を示す。 第２図は本発明の実施をするために使用した装置の一例
である。 １……サイクロン 11……ペレツト受入開口部 12……ペレツト送出開口部 13……気体放出開口部 ２……揮発性物質除去塔 21……上部円錐状部分 22……中央円筒状部分 23……下部逆円錐状部分 24……ペレツト受入開口部 25……ペレツト水準検出器 26……混合流体導入部 27……ペレツト取出開口部 ３……ペレツト送入管 ４……混合流体供給管 ５……ペレツト取出管 51……ペレツト取出量制御バルブFig. 1 shows steam (3S) nitrogen gas (N with a gauge pressure of 3 kg / cm 2
2 ) and the amount of water and the temperature of the mixed fluid obtained by mixing them are shown. FIG. 2 is an example of an apparatus used to carry out the present invention. 1 …… Cyclone 11 …… Pellet receiving opening 12 …… Pellet sending opening 13 …… Gas discharge opening 2 …… Volatile substance removal tower 21 …… Upper conical part 22 …… Central cylindrical part 23 …… Lower inverted conical part 24 …… Perlet receiving opening 25 …… Pellet level detector 26 …… Mixed fluid inlet 27 …… Pellet extraction opening 3 …… Perlet inlet pipe 4 …… Mixed fluid supply pipe 5 …… Pellet take-out pipe 51 …… Pellet take-out amount control valve
Claims (1)
方に移動する揮発性物質を含有する少くとも最初は水の
表面皮膜を有しない熱可塑性重合体ペレツトと、該ペレ
ツトの粘着温度以下の温度を有する水蒸気、不活性気体
および任意に水を含有する混合流体とを、該ペレツトに
含有されている揮発性物質の量を所望の水準まで低下さ
せるのに充分な時間連続的にかつ向流的に接触させるこ
とを特徴とする熱可塑性重合体ペレツトから揮発性物質
を除去する方法。1. A thermoplastic polymer pellet containing at least initially a surface coating of water, containing a volatile substance that migrates downward without substantial backmixing, and a temperature below the sticking temperature of the pellet. Having a water vapor, an inert gas and optionally a mixed fluid containing water, continuously and countercurrently for a time sufficient to reduce the amount of volatile substances contained in the pellet to the desired level. A method for removing volatile substances from a thermoplastic polymer pellet, which comprises contacting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17597987A JPH078915B2 (en) | 1987-07-16 | 1987-07-16 | Method for removing volatiles from thermoplastic polymers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17597987A JPH078915B2 (en) | 1987-07-16 | 1987-07-16 | Method for removing volatiles from thermoplastic polymers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422930A JPS6422930A (en) | 1989-01-25 |
| JPH078915B2 true JPH078915B2 (en) | 1995-02-01 |
Family
ID=16005579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17597987A Expired - Lifetime JPH078915B2 (en) | 1987-07-16 | 1987-07-16 | Method for removing volatiles from thermoplastic polymers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH078915B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100029867A1 (en) * | 2008-08-01 | 2010-02-04 | Sumitomo Chemical Company, Limited | Gas phase polymerization apparatus and method for producing olefin polymer |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60163127A (en) * | 1984-02-02 | 1985-08-26 | Seiko Instr & Electronics Ltd | Coordinate reader |
| GB0110161D0 (en) * | 2001-04-25 | 2001-06-20 | Bp Chem Int Ltd | Polymer treatment |
| US7776998B2 (en) * | 2002-10-30 | 2010-08-17 | Ineos Manufacturing Belgium Nv | Polymer treatment |
| JPWO2004083262A1 (en) * | 2003-02-28 | 2006-06-22 | 東亞合成株式会社 | Purification method of powdered resin |
| EP1591457A1 (en) * | 2004-04-30 | 2005-11-02 | SOLVAY (Société Anonyme) | Polyolefin treatment for separating volatile material |
-
1987
- 1987-07-16 JP JP17597987A patent/JPH078915B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100029867A1 (en) * | 2008-08-01 | 2010-02-04 | Sumitomo Chemical Company, Limited | Gas phase polymerization apparatus and method for producing olefin polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6422930A (en) | 1989-01-25 |
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