JP2001089438A - Method for recovering dimethylsulfoxide - Google Patents
Method for recovering dimethylsulfoxideInfo
- Publication number
- JP2001089438A JP2001089438A JP27046999A JP27046999A JP2001089438A JP 2001089438 A JP2001089438 A JP 2001089438A JP 27046999 A JP27046999 A JP 27046999A JP 27046999 A JP27046999 A JP 27046999A JP 2001089438 A JP2001089438 A JP 2001089438A
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- dmso
- mea
- recovering
- monoethanolamine
- 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.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ジメチルスルホキ
シド（以下、ＤＭＳＯという）とモノエタノールアミン
（以下、ＭＥＡという）の混合物から、ＤＭＳＯを回収
する方法に関するものである。[0001] The present invention relates to a method for recovering DMSO from a mixture of dimethyl sulfoxide (hereinafter, referred to as DMSO) and monoethanolamine (hereinafter, referred to as MEA).
【０００２】[0002]
【従来の技術】従来、ＤＭＳＯは、医農薬中間体の反応
溶剤や電子材料の特殊洗浄剤等として工業的に幅広く使
用されている。特に、ＤＭＳＯとＭＥＡの混合物は、電
子材料用の優れた特殊剥離剤のひとつである。また、Ｄ
ＭＳＯは前記剥離剤を使用して剥離を行なった後のリン
ス工程でリンス液としても使用されており、近年、これ
らの使用量が著しく増加しており、そこで発生する使用
済み液の処理問題が新しい課題としてクローズアップさ
れている。このような用途に使用されたＤＭＳＯとＭＥ
Ａの混合物は、通常の減圧蒸留だけではＤＭＳＯとＭＥ
Ａを完全に分離し、ＤＭＳＯのみを回収することは困難
である。また、晶析操作を繰り返してＤＭＳＯとＭＥＡ
を分離する方法（特開平７−１１８２２３号公報）もあ
るが、ＤＭＳＯとＭＥＡの混合物は、現状では、通常は
産業廃棄物として廃棄されている。2. Description of the Related Art Heretofore, DMSO has been widely used industrially as a reaction solvent for intermediates of medical and agricultural chemicals and a special detergent for electronic materials. In particular, a mixture of DMSO and MEA is one of the excellent special release agents for electronic materials. Also, D
MSO is also used as a rinsing liquid in a rinsing step after stripping using the above-mentioned stripping agent. In recent years, the amount of these used has increased remarkably. It has been highlighted as a new issue. DMSO and ME used for such applications
A mixture of DMSO and ME
It is difficult to completely separate A and recover only DMSO. In addition, the crystallization operation was repeated to obtain DMSO and MEA.
There is also a method of separating the compound (JP-A-7-118223), but at present, a mixture of DMSO and MEA is usually discarded as industrial waste.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、現状
では、通常は産業廃棄物として廃棄されている電子材料
用などに使用しているＤＭＳＯとＭＥＡの混合物から、
ＤＭＳＯを安価で効率よく回収する方法を提供するもの
であり、具体的には、非プロトン性極性有機溶媒で低毒
性であり、また、水と任意に混合する他、ＭＥＡなどの
有機溶媒とも任意の割合で混合する性質を有し、医農薬
中間体の反応溶剤や合成試薬、電子材料等の特殊洗浄
剤、剥離液として工業的に幅広く使用されているＤＭＳ
Ｏを含む混合物から安価で効率よくＤＭＳＯを回収する
方法、特に電子材料用として再使用が可能なほど高純度
かつ金属分の低いＤＭＳＯを回収する方法を提供するこ
とにある。SUMMARY OF THE INVENTION The object of the present invention is to obtain a mixture of DMSO and MEA which is currently used for electronic materials which are usually discarded as industrial waste.
The present invention provides a method for recovering DMSO at low cost and efficiently. Specifically, it is an aprotic polar organic solvent and has low toxicity, and is optionally mixed with water and optionally with an organic solvent such as MEA. DMS, which is widely used industrially as a special solvent for chemicals and agrochemical intermediates as a reaction solvent and synthetic reagents, special cleaning agents for electronic materials, etc.
It is an object of the present invention to provide a method for recovering DMSO efficiently and inexpensively from a mixture containing O, particularly a method for recovering DMSO having a high purity and a low metal content so that it can be reused for electronic materials.
【０００４】[0004]
【課題を解決するための手段】本発明は上記目的を達成
せんとするものであって、ＤＭＳＯとＭＥＡを含む混合
物からＤＭＳＯを分離回収する方法において、該混合物
を中和して減圧蒸留することを特徴とするＤＭＳＯの回
収方法であり、より具体的には、ＤＭＳＯとＭＥＡを含
み、ＤＭＳＯの含有率がＭＥＡの含有率よりも高い混合
物からＤＭＳＯを分離、回収する方法において、該混合
物を硫酸を用いて中和し、ＭＥＡを硫酸塩の形で該混合
物中に固定化しておき、減圧蒸留することによりＤＭＳ
Ｏを主成分とする液体を留出させ、次にイオン交換塔に
通液し、該液体中に微量残存しているＭＥＡを除去し、
精留を行ない、ＤＭＳＯを回収することを特徴とするＤ
ＭＳＯとＭＥＡ混合物からのＤＭＳＯの回収方法であ
る。DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above object, and in a method for separating and recovering DMSO from a mixture containing DMSO and MEA, the mixture is neutralized and distilled under reduced pressure. More specifically, in a method for separating and recovering DMSO from a mixture containing DMSO and MEA, wherein the content of DMSO is higher than the content of MEA, the method comprises the steps of: The MEA was fixed in the mixture in the form of sulfate in the form of a sulfate, and distilled under reduced pressure to obtain DMS.
Distill a liquid containing O as a main component, then pass the liquid through an ion exchange column to remove a small amount of MEA remaining in the liquid,
D is characterized by performing rectification and recovering DMSO
This is a method for recovering DMSO from a mixture of MSO and MEA.
【０００５】そして、本発明のＤＭＳＯの回収方法によ
れば、ＤＭＳＯは、電子材料処理用としてリサイクル使
用が可能なほど高純度でかつ金属分の低いものとして回
収される。すなわち、ＤＭＳＯのみを高純度かつ金属分
を低くして蒸留回収することができる。According to the method for recovering DMSO of the present invention, DMSO is recovered as a substance having a purity and a low metal content that can be recycled for electronic material processing. That is, only DMSO can be recovered by distillation with high purity and low metal content.
【０００６】[0006]
【発明の実施の形態】本発明は、ＤＭＳＯとＭＥＡの混
合物からＤＭＳＯを回収する方法に関するもので、本発
明においては、該混合物からのＤＭＳＯの回収率、コス
ト等のため、以下に述べるようないくつかの好ましい条
件がある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering DMSO from a mixture of DMSO and MEA. In the present invention, the following methods are used for the recovery rate of DMSO from the mixture, the cost, and the like. There are several favorable conditions.
【０００７】本発明におけるＤＭＳＯとＭＥＡ混合物の
組成は、ＤＭＳＯ含量がＭＥＡのそれと同じかそれより
低くても良いが、ＤＭＳＯ含量がＭＥＡのそれよりも高
い場合に好適に用いられる。具体的には、ＭＥＡ含有量
が例えば３０重量％以下のもので、より好ましくは１０
重量％以下のものである。また、このような混合物に
は、含水しているもの、非含水のものの両方があり、こ
れらにはＤＭＳＯとＭＥＡ以外に若干量の有機物が含ま
れているものもある。The composition of the mixture of DMSO and MEA in the present invention may be used when the DMSO content is the same or lower than that of MEA, but is higher when the DMSO content is higher than that of MEA. Specifically, the MEA content is, for example, 30% by weight or less, more preferably 10% by weight.
% By weight or less. In addition, such mixtures include both those containing water and those not containing water, and some of them contain a small amount of organic substances in addition to DMSO and MEA.
【０００８】本発明におけるＤＭＳＯとＭＥＡの混合物
の代表的な例として、電子材料等を処理した後の使用済
み剥離液が挙げられるが、本発明の混合物はこれに限定
されず、他用途に使用した混合物でもよい。また、本発
明は使用済み液と定義されないような混合物、つまりＤ
ＭＳＯとＭＥＡのみの混合物にも適用できる。[0008] A typical example of the mixture of DMSO and MEA in the present invention is a used stripper after treating an electronic material or the like. However, the mixture of the present invention is not limited to this, and may be used for other purposes. Mixtures may be used. The present invention also relates to mixtures which are not defined as spent liquids,
It can be applied to a mixture of only MSO and MEA.
【０００９】この場合液組成は特に限定されないが、好
適には使用済み液中のＭＥＡ濃度と同じでＭＥＡが３０
重量％以下、さらに好ましくは１０重量％以下で適用さ
れる。In this case, the composition of the liquid is not particularly limited, but preferably the same as the MEA concentration in the used liquid and the MEA is 30%.
It is applied at not more than 10% by weight, more preferably at most 10% by weight.
【００１０】本発明のＤＭＳＯの回収方法では、上記の
ような混合液中のＭＥＡを中和し蒸留する。中和には、
硫酸、塩酸、リン酸等の無機酸（鉱酸）が用いられる
が、無機酸の不揮発性、中和蒸留後の缶残の産廃処理が
容易であること等の理由で、硫酸が好ましく用いられ
る。このときに添加し用いられる硫酸の量は、混合液中
に存在するＭＥＡの０．８〜２．０倍当量が好ましく、
より好ましくは１．０〜１．５倍当量が適当である。こ
の場合、硫酸量が０．８倍当量未満では、ＭＥＡが十分
中和されず留出する。また、２．０倍当量より多い場合
は、硫酸が過剰となるため、コストアップにつながる。In the method for recovering DMSO of the present invention, MEA in the above-mentioned mixed solution is neutralized and distilled. To neutralize,
Inorganic acids (mineral acids) such as sulfuric acid, hydrochloric acid, and phosphoric acid are used. However, sulfuric acid is preferably used because of the non-volatility of the inorganic acid and the ease of industrial waste treatment of the residue after neutralization distillation. . The amount of sulfuric acid added and used at this time is preferably 0.8 to 2.0 equivalents of MEA present in the mixed solution,
More preferably, a 1.0 to 1.5 equivalent is appropriate. In this case, if the amount of sulfuric acid is less than 0.8 equivalent, the MEA is not sufficiently neutralized and is distilled off. On the other hand, if it is more than 2.0 equivalents, the sulfuric acid becomes excessive, which leads to an increase in cost.
【００１１】ここでいう中和とは、以下の反応式
（１）、（２）で表されるような反応である。The neutralization referred to herein is a reaction represented by the following reaction formulas (1) and (2).
【００１２】 HOCH2CH2NH2 + H2SO4 → HOCH2CH2NH3 +・HSO4 ~ ・・・（１） 2HOCH2CH2NH2 + H2SO4 → (HOCH2CH2NH3 +)2・SO4 2~・・・（２） 中和蒸留に際しては、缶温は通常は１３０℃以下、より
好適には１１０℃以下が好ましい。このときの缶内の圧
力としては、それぞれ１４．２ｋＰａ以下、６．７ｋＰ
ａ以下が好ましい。温度または圧力が高くなりすぎると
ＤＭＳＯの分解が著しく促進されるので、好ましくな
い。HOCH 2 CH 2 NH 2 + H 2 SO 4 → HOCH 2 CH 2 NH 3 + · HSO 4 ~・ ・ ・ (1) 2HOCH 2 CH 2 NH 2 + H 2 SO 4 → (HOCH 2 CH 2 NH 3 + ) 2 · SO 4 2 ~ ... (2) In the neutralization distillation, the can temperature is usually 130 ° C or lower, more preferably 110 ° C or lower. At this time, the pressure in the can was 14.2 kPa or less and 6.7 kP, respectively.
a or less is preferable. If the temperature or pressure is too high, the decomposition of DMSO is remarkably promoted, which is not preferable.
【００１３】本発明において、このようにして中和蒸留
して得られたＤＭＳＯを主成分とする液体は、次にイオ
ン交換処理、活性炭吸着処理、酸性白土処理、モレキュ
ラーシーブ吸着処理等に供されるが、ＭＥＡの除去が確
実であること、処理速度が比較的速いこと等の理由でイ
オン交換処理が最も好ましい。イオン交換処理は、好適
にはＤＭＳＯを主成分とする液体をイオン交換塔に通液
することにより行なわれるが、このとき、塔に充填する
イオン交換樹脂としては、ＭＥＡがカチオンになること
からカチオン交換樹脂を単独で使用するのが適当であ
る。カチオン交換樹脂とアニオン交換樹脂とを混合した
ものを使用しても処理能力は有るが、この場合、アニオ
ン交換樹脂はＭＥＡの除去には寄与しておらず無意味で
ある。このことからもカチオン交換樹脂単独で使用する
のが適当である。In the present invention, the liquid containing DMSO as a main component obtained by the neutralization distillation in this manner is then subjected to an ion exchange treatment, an activated carbon adsorption treatment, an acid clay treatment, a molecular sieve adsorption treatment and the like. However, the ion exchange treatment is most preferable because the removal of MEA is reliable and the treatment speed is relatively high. The ion exchange treatment is preferably performed by passing a liquid containing DMSO as a main component through an ion exchange column. At this time, the ion exchange resin to be filled in the column is a cation exchange agent because MEA is a cation. Suitably, the exchange resin is used alone. The use of a mixture of a cation exchange resin and an anion exchange resin has a processing ability, but in this case, the anion exchange resin does not contribute to the removal of MEA and is meaningless. From this, it is appropriate to use the cation exchange resin alone.
【００１４】また、イオン交換は流動床式でも固定床式
でも良いが、固定床式が好ましい。処理温度は常温が好
ましい。The ion exchange may be a fluidized bed type or a fixed bed type, but a fixed bed type is preferred. The processing temperature is preferably room temperature.
【００１５】通液量はウエット樹脂の１００〜１５０倍
量が目安であるが、この通液量は樹脂の交換容量と被処
理液中のＭＥＡ濃度に大きく依存する。処理前に被処理
液中のＭＥＡ濃度の分析をすることが重要である。The amount of liquid passing is roughly 100 to 150 times that of the wet resin, but the amount of liquid passing largely depends on the exchange capacity of the resin and the MEA concentration in the liquid to be treated. It is important to analyze the MEA concentration in the liquid to be treated before the treatment.
【００１６】さらに本発明では、イオン交換処理後の液
体を精留するが、このときの操作条件としては以下の様
なものがある。具体的には、例えば特開平９−２７８７
４３号公報に記載のように、精留における缶温は通常１
３０℃以下、より好適には１１０℃以下である。缶内の
圧力としては、それぞれ１４．２ｋＰａ以下、６．７ｋ
Ｐａ以下が好ましい。温度または圧力が高くなりすぎる
とＤＭＳＯの分解が著しく促進されるので、好ましくな
い。Further, in the present invention, the liquid after the ion exchange treatment is rectified. The operating conditions at this time are as follows. Specifically, for example, Japanese Patent Application Laid-Open No. 9-2787
As described in JP-A No. 43, the can temperature in rectification is usually 1 unit.
The temperature is 30 ° C or lower, more preferably 110 ° C or lower. The pressure in the can was 14.2 kPa or less and 6.7 k, respectively.
Pa or less is preferable. If the temperature or pressure is too high, the decomposition of DMSO is remarkably promoted, which is not preferable.
【００１７】また、蒸留精製し、回収したＤＭＳＯを電
子材料処理用に使用可能なレベルにまでするためには、
接液部、特に気化部以降の設備の材質に耐食性材料を使
用することが好ましい。この様に耐食性材料を使用する
と、回収したＤＭＳＯ中に含まれる鉄等の金属分を１０
ｐｐｂ以下にまで低く押さえることが出来る。Further, in order to reduce the DMSO recovered by distillation and purification to a level usable for electronic material processing,
It is preferable to use a corrosion resistant material for the material of the equipment after the liquid contact part, especially the vaporization part. When the corrosion resistant material is used in this way, the metal content such as iron contained in the recovered DMSO can be reduced by 10%.
It can be held down to ppb or less.
【００１８】さらに、蒸留時のＤＭＳＯの熱分解防止等
のため、蒸留に使用するＤＭＳＯを主成分とする粗液の
ｐＨをアルカリ性に保つことが重要である。好ましいｐ
Ｈは８以上で、より好ましくはｐＨ９〜１２の範囲内で
好適なｐＨが選択される。Further, in order to prevent the thermal decomposition of DMSO during the distillation, it is important to keep the pH of the crude liquid containing DMSO as a main component used in the distillation to be alkaline. Preferred p
H is 8 or more, and more preferably a suitable pH is selected within the range of pH 9 to 12.
【００１９】粗液のｐＨをアルカリ性に調整する際に使
用する物質としてはアルカリ金属やアルカリ土類金属の
水酸化物または炭酸塩等が挙げられるが、特に水酸化ナ
トリウムが好ましく使用される。Substances used for adjusting the pH of the crude liquid to alkaline include hydroxides or carbonates of alkali metals and alkaline earth metals, and sodium hydroxide is particularly preferably used.
【００２０】本発明で回収されたＤＭＳＯは、電子材料
処理の他、医農薬中間体の反応溶剤や合成試薬に好適に
使用される。The DMSO recovered in the present invention is suitably used as a reaction solvent or a synthetic reagent for a pharmaceutical or agricultural chemical intermediate in addition to electronic material processing.
【００２１】[0021]
【実施例】以下、図面を参照して本発明の実施例につい
て詳細に説明するが、本発明はこれらの実施例に限定さ
れない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to these embodiments.
【００２２】図１は、図１は、本発明のＤＭＳＯの回収
において使用する回収装置の概要を説明するためのモデ
ル図である。FIG. 1 is a model diagram for explaining the outline of the recovery apparatus used in the recovery of DMSO of the present invention.
【００２３】図１において、配管５からＤＭＳＯを９２
％、ＭＥＡを４．５％、水を３．５％含む混合液４００
０ｇを配管７を経て蒸発缶１に供給し、別に配管６から
９８％硫酸１７６ｇを配管７を経て蒸発缶１に供給して
蒸発缶１内で中和し、缶内圧を４．０ｋＰａに保ち、缶
温が１２０℃に達するまで蒸留した。次いで、蒸留液を
配管８でコンデンサ２に導きコンデンサ２で凝縮して得
られた留分は３２００ｇで、その内、ＤＭＳＯは９５．
６％であった。この留分を配管９からイオン交換塔３に
供給し、留分中にｐｐｍレベル残存しているＭＥＡを除
去した後、配管１０を通して蒸留塔４に供給し、缶内圧
４．０ｋＰａで脱水精留を行なった。その結果、２８４
０ｇのＤＭＳＯが得られた。この回収されたＤＭＳＯの
品質は、ｐＨ７．０、Ｎａ含有量２ｐｐｂ、Ｆｅ含有量
１ｐｐｂと金属不純物が少なく、合成したＤＭＳＯなみ
の品質で、電子材料処理用として再利用可能であった。
またこのときのＤＭＳＯの回収率は７７％であった。Referring to FIG. 1, 92
%, MEA 4.5%, water 3.5%
0 g is supplied to the evaporator 1 via the pipe 7, and 176 g of 98% sulfuric acid is separately supplied from the pipe 6 to the evaporator 1 via the pipe 7 and neutralized in the evaporator 1, and the internal pressure of the can is maintained at 4.0 kPa. , Until the can temperature reached 120 ° C. Next, the distillate was led to the condenser 2 through the pipe 8 and condensed by the condenser 2 to obtain 3200 g of a fraction, of which DMSO contained 95.
6%. This fraction is supplied from the pipe 9 to the ion exchange tower 3 to remove the MEA remaining at the ppm level in the fraction, and then supplied to the distillation tower 4 through the pipe 10, and subjected to dewatering and rectification at a vessel internal pressure of 4.0 kPa. Was performed. As a result, 284
0 g of DMSO was obtained. The quality of the recovered DMSO was pH 7.0, the content of Na was 2 ppb, and the content of Fe was 1 ppb, the content of metal impurities was small, and the quality was the same as that of the synthesized DMSO.
At this time, the recovery of DMSO was 77%.
【００２４】[0024]
【発明の効果】ＤＭＳＯとＭＥＡの混合物は、通常は電
子材料処理使用後は廃棄されている。これに対し本発明
によれば、従来廃棄物として処理されていたＤＭＳＯ／
ＭＥＡ混合物から、簡便に効率よくＤＭＳＯを分離、回
収して有効に再利用することができる。例えば、本発明
により回収したＤＭＳＯは、そのまま電子材料用の剥離
液や洗浄剤として再利用することが可能であり、さらに
各種反応溶媒、染料用溶剤、防カビ剤等にも再利用可能
であることから、省資源化、コスト低減化に寄与できる
ものである。The mixture of DMSO and MEA is usually discarded after use of electronic material processing. On the other hand, according to the present invention, DMSO /
DMSO can be simply and efficiently separated and recovered from the MEA mixture and efficiently reused. For example, DMSO recovered according to the present invention can be reused as it is as a stripping solution or cleaning agent for electronic materials, and can also be reused as various reaction solvents, dye solvents, fungicides, and the like. Therefore, it can contribute to resource saving and cost reduction.
【００２５】本発明によれば、装置も簡単な構造のもの
で済み、処理コストも安価であることから、経済的にも
有利である。According to the present invention, the apparatus has a simple structure and the processing cost is low, which is economically advantageous.
【図１】 図１は、本発明のＤＭＳＯの回収において使
用する回収装置の概要を説明するためのモデル図であ
る。FIG. 1 is a model diagram for explaining an outline of a recovery apparatus used in recovering DMSO of the present invention.
１・・・蒸発缶 ２・・・コンデンサ ３・・・イオン交換塔 ４・・・蒸留塔 ５〜１１・・・配管 DESCRIPTION OF SYMBOLS 1 ... Evaporator 2 ... Condenser 3 ... Ion exchange tower 4 ... Distillation tower 5-11 ... Piping
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹内 宏 滋賀県守山市勝部６丁目１番１号 東レ・ ファインケミカル株式会社内 (72)発明者 平居 克仁 滋賀県守山市勝部６丁目１番１号 東レ・ ファインケミカル株式会社内 Ｆターム(参考） 4H006 AA02 AD11 AD30 AD32 BB22 DA60 TA01 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Hiroshi Takeuchi, Inventor, 6-1-1-1 Katsurbe, Moriyama-shi, Shiga Prefecture Toray Fine Chemical Co., Ltd. (72) Katsuhito Hirai 6-1-1, Katsurbe, Moriyama-shi, Shiga Toray・ F-term in Fine Chemical Co., Ltd. (reference) 4H006 AA02 AD11 AD30 AD32 BB22 DA60 TA01
Claims (4)
アミンを含む混合物からジメチルスルホキシドを分離回
収する方法において、該混合物を中和して減圧蒸留する
ことを特徴とするジメチルスルホキシドの回収方法。1. A method for separating and recovering dimethyl sulfoxide from a mixture containing dimethyl sulfoxide and monoethanolamine, wherein the mixture is neutralized and distilled under reduced pressure.
し、該混合物中のモノエタノールアミンを塩の形で固定
化して減圧蒸留することを特徴とする請求項１記載のジ
メチルスルホキシドの回収方法。2. The recovery of dimethyl sulfoxide according to claim 1, wherein sulfuric acid is used to neutralize the mixture, monoethanolamine in the mixture is immobilized in the form of a salt, and the mixture is distilled under reduced pressure. Method.
を主成分とする液体中に微量残存しているモノエタノー
ルアミンを、イオン交換して除去することを特徴とする
請求項１または２記載のジメチルスルホキシドの回収
法。3. The dimethyl sulfoxide according to claim 1, wherein a trace amount of monoethanolamine remaining in the liquid containing dimethyl sulfoxide as a main component after vacuum distillation is removed by ion exchange. Collection method.
子材料処理用としてリサイクル使用が可能なほど高純度
でかつ金属分の低いものであることを特徴とする請求項
１〜３いずれかに記載のジメチルスルホキシドの回収
法。4. The dimethyl sulfoxide according to claim 1, wherein the recovered dimethyl sulfoxide has a high purity and a low metal content so that it can be recycled for treating electronic materials. Method for recovering sulfoxide.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27046999A JP3692497B2 (en) | 1999-09-24 | 1999-09-24 | Method for recovering dimethyl sulfoxide |
| TW89112301A TW553926B (en) | 1999-09-24 | 2000-06-22 | Method for recycling dimethylsulfoxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27046999A JP3692497B2 (en) | 1999-09-24 | 1999-09-24 | Method for recovering dimethyl sulfoxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001089438A true JP2001089438A (en) | 2001-04-03 |
| JP3692497B2 JP3692497B2 (en) | 2005-09-07 |
Family
ID=17486752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27046999A Expired - Lifetime JP3692497B2 (en) | 1999-09-24 | 1999-09-24 | Method for recovering dimethyl sulfoxide |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3692497B2 (en) |
| TW (1) | TW553926B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312124C (en) * | 2002-05-13 | 2007-04-25 | 东丽精密化学株式会社 | Process for purifying high purity dimethyl sulfoxide, and dimethyl sulfoxide and amine mixture |
| US9492213B2 (en) | 2000-02-01 | 2016-11-15 | Biomet C.V. | Volar fixation system |
| CN108686397A (en) * | 2017-04-12 | 2018-10-23 | 东丽精细化工株式会社 | Distill the method and multisection type destilling tower of dimethyl sulfoxide |
| CN110713446A (en) * | 2019-12-04 | 2020-01-21 | 河北美邦膜科技有限公司 | Method for separating dimethyl sulfoxide from amlodipine resolution waste liquid |
| CN114989047A (en) * | 2022-07-21 | 2022-09-02 | 无锡中天固废处置有限公司 | Method for recovering dimethyl sulfoxide from waste organic solvent |
-
1999
- 1999-09-24 JP JP27046999A patent/JP3692497B2/en not_active Expired - Lifetime
-
2000
- 2000-06-22 TW TW89112301A patent/TW553926B/en not_active IP Right Cessation
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9492213B2 (en) | 2000-02-01 | 2016-11-15 | Biomet C.V. | Volar fixation system |
| US9572609B2 (en) | 2000-02-01 | 2017-02-21 | Biomet C.V. | Method of using a volar bone plate on a fracture |
| CN1312124C (en) * | 2002-05-13 | 2007-04-25 | 东丽精密化学株式会社 | Process for purifying high purity dimethyl sulfoxide, and dimethyl sulfoxide and amine mixture |
| CN108686397A (en) * | 2017-04-12 | 2018-10-23 | 东丽精细化工株式会社 | Distill the method and multisection type destilling tower of dimethyl sulfoxide |
| CN110713446A (en) * | 2019-12-04 | 2020-01-21 | 河北美邦膜科技有限公司 | Method for separating dimethyl sulfoxide from amlodipine resolution waste liquid |
| CN114989047A (en) * | 2022-07-21 | 2022-09-02 | 无锡中天固废处置有限公司 | Method for recovering dimethyl sulfoxide from waste organic solvent |
Also Published As
| Publication number | Publication date |
|---|---|
| TW553926B (en) | 2003-09-21 |
| JP3692497B2 (en) | 2005-09-07 |
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