CN1030375C - Modified molecular sieve adsorbent for purifying sulfur hexafluoride gas and preparation thereof - Google Patents
Modified molecular sieve adsorbent for purifying sulfur hexafluoride gas and preparation thereof Download PDFInfo
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- CN1030375C CN1030375C CN 92112229 CN92112229A CN1030375C CN 1030375 C CN1030375 C CN 1030375C CN 92112229 CN92112229 CN 92112229 CN 92112229 A CN92112229 A CN 92112229A CN 1030375 C CN1030375 C CN 1030375C
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- molecular sieve
- adsorbent
- gas
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- ion
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 33
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical class [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 7
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 5
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000002808 molecular sieve Substances 0.000 claims abstract description 31
- 150000002500 ions Chemical class 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 244000275012 Sesbania cannabina Species 0.000 claims abstract 2
- 229920002678 cellulose Polymers 0.000 claims abstract 2
- 239000001913 cellulose Substances 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000005342 ion exchange Methods 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000006424 Flood reaction Methods 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 18
- 238000001179 sorption measurement Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract description 4
- 229910052708 sodium Inorganic materials 0.000 abstract description 4
- 239000011734 sodium Substances 0.000 abstract description 4
- 239000002341 toxic gas Substances 0.000 abstract description 3
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000002574 poison Substances 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 13
- 229910052731 fluorine Inorganic materials 0.000 description 9
- 239000011737 fluorine Substances 0.000 description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 4
- 241000219782 Sesbania Species 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 210000000952 spleen Anatomy 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 229910013553 LiNO Inorganic materials 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000011067 equilibration Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 231100000820 toxicity test Toxicity 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A modified A, X molecular sieve adsorbent for purifying sulfur hexafluoride gas is prepared through modifying molecular sieve A or X by Ca or Mg and Li or K ions, adding sodium cellulose or sesbania powder as adhesive and structural regulator of adsorbent, and immersing in silicate solution before calcining. The absorbent is used for SF6In electrical equipment, SF can be effectively eliminated6Various toxic gases generated in the gas and the equipment operation prolong the service life of the equipment and avoid the poison to maintenance personnel. Further, the adsorbent is used for SF6The adsorbent has the advantages of weak gas adsorption, strong adsorption capacity to toxic gas, acid gas and water, high speed, high compressive strength, good wear resistance and long service life.
Description
The present invention relates to a kind of adsorbent and preparation method thereof, specifically a kind ofly be used to remove SF
6In the electric equipment, SF
6By the hypertoxic low-fluorine sulfide impurities that produces after arcing or the spark discharge, the adsorbent of acidic materials and moisture content etc. and its preparation method.This adsorbent also is applicable to any system with above-mentioned gas, as industrial production SF
6Gas cleaning etc.
The sulfur hexafluoride electric equipment be a kind of have nontoxic, insulating capacity is strong, arc extinguishing waits the electric equipment of excellent performance rapidly.Yet SF
6The impurity of in manufacture process, leaving over and under the high temperature action of electric arc, the micro-low-fluorine sulfide impurities that decomposes by electrolysis and ionization, all belong to hypertoxic gas, the infringement human lung, the serious harm operator ' s health, and when minor amount of water existed, these low-fluorine sulfides decomposed generation HF, SO gradually
2And H
2SO
3Deng strong corrosive material, not only harmful, and the heavy corrosion electric equipment, influence the electric equipment performance.All adopt both at home and abroad at present and in electric equipment, place adsorbent to remove the method for objectionable impurities gas.Normally used adsorbent has activated alumina and synthetic zeolite class.So far, relevant reported in literature biases toward the low-fluorine sulfide toxicity test more and measures SF both at home and abroad
6Impurity content standard, and to adsorbent preparation, adsorption capability of different absorbate and to remove the research reports such as effect of above-mentioned impurity less.As at Elekfrotech, oh2 1979 68(4), 216-20 has reported when the power circuit switch disconnects, and uses Al
2O
3Absorption SF
6The toxicity low-fluorine sulfide that decompose to generate is at Enorgetlle 1976(11), 13-14(Rnss) reported with Polysorob and adsorbed SF
6The low-fluorine sulfide that decomposes.Inventor of the present invention once proposed to utilize the 5A of modification and LiX mixed molecules sieve adsorbant (CN85102711) to remove SF
6In the electric equipment after arcing and spark discharge, SF
6The hypertoxic low-fluorine sulfide gas that decomposition and ionization produce.The objective of the invention is on the basis of CN85102711 technology, provide a kind of and be adapted at a large amount of SF
6Gas exists down, more can remove SOF effectively
2, SO
2, HF and S
2F
10The adsorbent of molecular sieve of toxic gases such as O.This adsorbent also can be used for industrial production SF simultaneously
6Low-fluorine sulfide in the gas, impurity such as sour gas and moisture content.
Technology provided by the present invention once proposed to carry out on (CN85102711) technical foundation improved present inventors.Because at SF
6Gas behind electric arc and electrion, divide vent one's spleen in key component be SOF
2, SO
2And HF
6Exist.For adapting at a large amount of SF
6Gas exists down, removes above-mentioned molecular size, the impurity that character is different, this adsorbent is to mix with the A of different pore sizes and X molecular sieve, in conjunction with using different ions (Ca, Mg, K, Li etc.) effect of modification, thus adsorbent is had concurrently select shape absorption and to big molecule such as S
2F
10The energy of adsorption of O.Adsorbent specifically provided by the present invention is that the A that mixes with certain proportion and X type molecular sieve are as Main Ingredients and Appearance, utilize Ca or Mg and Li or K ion to carry out A or X molecular sieve that modification must contain Ca or the Mg of Li or K, add the mixed molecules sieve adsorbant that binding agent clay and sodium cellulosate or sesbania powder obtain as the pore structure mediator agent of binding agent and adsorbent, it forms percentage by weight: mixed molecular sieve: 70～85%, the modification ion, Ca or Mg and K or Li ion: 0.2～1.5%; All the other are clay.And in the mixed molecular sieve ratio of A type molecular sieve and X type molecular sieve be 1: 1～3(Wt).In above-mentioned adsorbent, its preferable molecular sieve modified process is to adopt Ca, K ion and A type, and Mg, Li ion and X type molecular sieve, the A type molecular sieve that promptly obtains containing K, Ca ion with contain Li, the X type molecular sieve of Mg ion mixes by a certain percentage and is made into mixed molecular sieve.The various physical properties of the adsorbent that is provided are: surface area 380～480m
2/ g, adsorpting water quantity are 20～24%(wt), and heap is made a gesture of measuring 0.7～0.75 gram/ml, particle size diameter 2-3mm, intensity＞10kg/2.5mm and dry linting not.Be applicable to normal temperature, static state, dynamically absorption.Use this adsorbent can be with SF
6SOF in the gas
2, SO
2, S
2F
10O, SO
2F
2, the content that is removed to that impurity such as acid gas, moisture content are high-speed is＜1ppm.
Preparation of adsorbent method provided by the present invention adopts following step:
1, gets 4A or NaX molecular sieve, in the soluble-salt solution that contains Ca or Mg and Li or K ion (chloride or nitrate), carry out ion-exchange respectively, make the Ca that contains Li or K or A type or the X type modified molecular screen of Mg.The ion-exchange ion exchange technique of molecular sieve is routinely carried out one or many under 80～95 ℃, after the ion-exchange, after filtration, be washed till no Cl or NO with deionized water
- 3Ion.
2, above-mentioned A type that contains Ca or Mg and Li or K or the X type molecular sieve that obtains mixed in 1: 1～3 ratios, add again by the clay of adsorbent weight 10～25% and in 0.2～1.5% ratio adding sodium cellulosate or the sesbania powder of molecular sieve and clay gross weight, mix moulding, drying.Drying can be carried out through air dry or oven dry in 20-150 ℃.
3, above-mentioned material after drying carries out drying through the process with 2 again with the silicate solutions dipping that contains 10-25%.
4, soak the dried material of silicate,, technology of the present invention is done explanation in further detail below by example after 400-650 ℃ of roasting more than 1 hour, can obtain adsorbent of the present invention.
Example 1: adsorbent preparation
(1) 10 gram LiNO
3, 0.5 the gram Mg(NO
3)
2Be dissolved in the 500ml deionized water, treat dissolving fully after, add 100 gram NaX type molecular sieves, under 80-95 ℃ of condition, stir exchange 3 hours, cross Shanghai, be washed till no NO with deionized water
- 3Till, Shanghai is also following dry 3 hours at 130 ℃.
(2) 20 gram CaCl
2, 2 gram KCl, soluble in water, add 100 gram 4A molecular sieves, in 80-95 ℃ of exchange 3 hours, cross Shanghai under stirring, be washed till no Cl
-Till.Sample was in 130 ℃ of dryings 3 hours.
(3) get the sample that 60 gram (1) kind methods make, get the sample that 40 gram (2) kind methods make, add 20 gram clays and 0.2 gram sesbania powder or sodium cellulosate mixing aftershaping, use 15-25%(Wt after drying or the roasting) silicate handle, 130 ℃ dry down in 550 ℃ of roastings 3 hours, makes finished product.
(4) get (1) 40 gram and (2) 60 grams, add 25 gram clays, add 0.2 gram sesbania powder mixed-forming, dry back made finished product in 3 hours in 550 ℃ of roastings.
Example 2: the performance test 1 of adsorbent,
(1) use-case 1(3) gained adsorbent 2 grams charge into 2.3 liters SF are housed
6Decomposition gas 5Kg/cm
2The absorption narrow-necked earthen jar in, carry out static state absorption, through the interval of certain hour, measure after absorption residual low-fluorine sulfide impurities content in the gas.
(2) for having adsorbed a period of time SF afterwards
6Divide (the SO that vents one's spleen
2, SOF
2, S
2H
10The O residual content adopts chromatography to detect.Mainly adopt its acid number of measurement for various sulfur-bearing components, the method for hydrolyzable fluoride, the result who measures the acid number gained is an aggregate data, SF
6Divide all kinds of catabolite major parts in venting one's spleen to be absorbed by alkali lye.Can comprehensively weigh adsorbent to various SF with this value
6The adsorption effect of catabolite, thereby the performance of mensuration adsorbent.
(3) SF
6Impurity content is SO among the raw material
22500PPm; SOF
2Be 140PPm; S
2F
10O is 270ppm; Acid number is that 887ppm(is in HF); The hydrolyzable fluoride is 438ppm.SO
2F
21080ppm。
Result of experiment is listed in table 1 and table 2.Table 1 is the adsorption capacity of adsorbent to acidic materials, finds out that with data in the table this adsorbent is very fast to the adsorption rate of acidic materials, only 887PPm can be reduced to＜5PPm with 48 hours.The hydrolyzable fluoride is reduced to＜2PPm by 438PPm.It is very short that adsorbate reaches equilibration time.
Table 1 adsorption experiment result
Absorption back residual impurity content PPm(V)
The adsorption time acid number is (with HF hydrolyzable fluoride
(hour) meter PPm) (SOF
2, HF, SF
4) ppm
0 887 438
6 26 7
12 9 2
24 6 2
Table 2 adsorption experiment result 2
Adsorption time (hour) absorption back residual impurity content PPm(V)
SO
2SOF
2S
2F
10O
0 2500 140 270
6 388 1 152
14 88 1 128
30 28 1 100
48 4 1 7
Claims (3)
1, a kind of sulfur hexafluoride gas purification adsorbent of molecular sieve, it is characterized in that molecular sieve is to contain the Ca of Li or K or A type and two kinds of molecular sieves mixing of the X type molecular sieve composition of Ma, the percentage by weight of its composition is: molecular sieve: 70～85%, Ca or Mg and Li or K ion are 0.2～1.5%, and all the other are clay; A type in its molecular sieve: the weight ratio of X type is 1: 1～3.
2,, it is characterized in that molecular sieve adopts the CaA type molecular sieve that contains K to mix by a certain percentage with the MgX type molecular sieve that contains Li according to the described adsorbent of claim 1.
3, a kind of being used for by the described preparation of adsorbent method of claim 1, it comprise adopt ion exchange technique with modification ion-exchange to molecular sieve, the adding additives moulding, the drying and roasting process is characterized in that:
(1) cellulose or the sesbania powder of adding mixed material total amount 0.2～1.5% before moulding;
(2) material floods with the silicate solutions that contains 10～25%, and then carries out drying and roasting behind shaping and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112229 CN1030375C (en) | 1992-12-19 | 1992-12-19 | Modified molecular sieve adsorbent for purifying sulfur hexafluoride gas and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112229 CN1030375C (en) | 1992-12-19 | 1992-12-19 | Modified molecular sieve adsorbent for purifying sulfur hexafluoride gas and preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1088481A CN1088481A (en) | 1994-06-29 |
| CN1030375C true CN1030375C (en) | 1995-11-29 |
Family
ID=4945839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92112229 Expired - Lifetime CN1030375C (en) | 1992-12-19 | 1992-12-19 | Modified molecular sieve adsorbent for purifying sulfur hexafluoride gas and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030375C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3356965B2 (en) * | 1997-06-20 | 2002-12-16 | 株式会社日立製作所 | SF6 gas recovery / purification processing apparatus and method |
| RU2351838C2 (en) * | 2004-06-02 | 2009-04-10 | Гоулден Трайэнгл Энтерпрайзес Пти Лтд | Device and method of trapping and retaining leaking gaseous sulphur hexafluoride |
| CN100448525C (en) * | 2005-12-14 | 2009-01-07 | 李宏愿 | Molecular-sieve removing adsorbent of low-fluorine sulfide impurities and its production |
| CN101820734A (en) * | 2010-04-01 | 2010-09-01 | 深圳市华测检测技术股份有限公司 | Equipment anticorrosion device in protective box and anticorrosion method |
| CN103120928B (en) * | 2011-11-18 | 2014-06-25 | 国家电网公司 | Method for producing adsorbing agent for adsorbing subfluoride in sulfur hexafluoride |
| CN102502692B (en) * | 2011-11-21 | 2013-09-25 | 烟台大学 | High-intensity molecular sieve and preparation method thereof |
| CN102923673B (en) * | 2012-11-21 | 2014-10-01 | 四川众力氟业有限责任公司 | Purification technology for sulfur hexafluoride |
| CN105642225B (en) * | 2014-11-10 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of preparation method for the adsorbent of unsaturated ester deacidification |
| CN112371080B (en) * | 2020-10-26 | 2023-03-28 | 松山湖材料实验室 | Mesoporous adsorption material and preparation method and application thereof |
| CN112774654A (en) * | 2020-12-31 | 2021-05-11 | 杭州谱育科技发展有限公司 | Preparation method of adsorbent for selectively adsorbing sulfur dioxide |
-
1992
- 1992-12-19 CN CN 92112229 patent/CN1030375C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1088481A (en) | 1994-06-29 |
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Expiration termination date: 20121219 Granted publication date: 19951129 |