CN115770623B - Preparation method of ion exchange membrane for camphoresterification reaction - Google Patents
Preparation method of ion exchange membrane for camphoresterification reaction Download PDFInfo
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- CN115770623B CN115770623B CN202211589056.6A CN202211589056A CN115770623B CN 115770623 B CN115770623 B CN 115770623B CN 202211589056 A CN202211589056 A CN 202211589056A CN 115770623 B CN115770623 B CN 115770623B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 100
- 239000003014 ion exchange membrane Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000007788 liquid Substances 0.000 claims abstract description 62
- 238000002791 soaking Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000007654 immersion Methods 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 18
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000005470 impregnation Methods 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 230000003197 catalytic effect Effects 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 38
- 230000000694 effects Effects 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 238000005886 esterification reaction Methods 0.000 description 6
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- 241000723346 Cinnamomum camphora Species 0.000 description 2
- CRPUJAZIXJMDBK-UHFFFAOYSA-N camphene Chemical compound C1CC2C(=C)C(C)(C)C1C2 CRPUJAZIXJMDBK-UHFFFAOYSA-N 0.000 description 2
- 229930008380 camphor Natural products 0.000 description 2
- 229960000846 camphor Drugs 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000007172 homogeneous catalysis Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- PXRCIOIWVGAZEP-UHFFFAOYSA-N Primaeres Camphenhydrat Natural products C1CC2C(O)(C)C(C)(C)C1C2 PXRCIOIWVGAZEP-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229930006739 camphene Natural products 0.000 description 1
- ZYPYEBYNXWUCEA-UHFFFAOYSA-N camphenilone Natural products C1CC2C(=O)C(C)(C)C1C2 ZYPYEBYNXWUCEA-UHFFFAOYSA-N 0.000 description 1
- 229940025250 camphora Drugs 0.000 description 1
- 239000010238 camphora Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229940085790 synthetic camphor Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a preparation method of an ion exchange membrane for camphoresterification reaction, which belongs to the technical field of chemical product preparation, and can be used for preparing the ion exchange membrane for camphoresterification reaction with high catalytic efficiency more safely, and has the characteristics of simple process, safety and environmental protection; the method comprises the following steps: (1) Taking a base film, fixing the base film, placing the base film in a reaction tank, adding immersion liquid into the reaction tank, heating and soaking the base film, and discharging the immersion liquid in the reaction tank; (2) Adding curing liquid into the reaction tank, heating and soaking, discharging the curing liquid in the reaction tank, and wiping the upper and lower surfaces of the film and the reaction tank; (3) Adding expansion liquid into the reaction tank, heating and soaking, and discharging the expansion liquid in the reaction tank; (4) Adding concentrated sulfuric acid into the reaction tank, heating and soaking, cooling, and discharging the concentrated sulfuric acid in the reaction tank; (5) Adding sulfuric acid with sequentially reduced concentration into the reaction tank for multiple times; and (6) adding clear water into the reaction tank for cleaning.
Description
Technical Field
The invention relates to the technical field of chemical product preparation, in particular to a preparation method of an ion exchange membrane for camphoresterification reaction.
Background
In the existing synthetic camphor production, camphene and formic acid or glacial acetic acid are subjected to addition esterification reaction by using a catalytic system to generate organic acid isobornyl ester. The catalytic systems used can be divided into two types, homogeneous catalysis and heterogeneous catalysis. The homogeneous catalysis uses liquid inorganic acid as catalyst, such as sulfuric acid, etc., but the esterification reaction has the problems of poor reaction selectivity, more byproducts, difficult subsequent separation, easy corrosion of equipment, and large amount of acid-containing waste water generation, etc. The heterogeneous catalyst takes ion exchange resin, zeolite, molecular sieve and the like as catalysts, and the catalyst can improve the selectivity of the reaction, reduce or avoid equipment corrosion and discharge of acid wastewater, thus being the most ideal esterification method.
The ion exchange membrane for the existing camphora esterification reaction is generally made of polyethylene film, and the manufacturing process comprises the following steps: (1) Soaking the film in divinylbenzene to swell, and soaking in warm water to cure; (2) Wiping the surface of the film after curing, and sulfonating the film with dichloroethane solution containing chlorosulfonic acid; (3) Putting the film subjected to sulfonation treatment into hot water containing alkali for hydrolysis; (4) Soaking the hydrolyzed film in dichloroethane solution, and sulfonating the film in high-temperature concentrated sulfuric acid; (5) Gradually cleaning the sulfonated film with dilute sulfuric acid.
The ion exchange membrane for camphor esterification has the problems of quick catalyst deactivation and long catalytic reaction time, and the sulfonation reaction in the membrane preparation process belongs to a special process, so that the preparation difficulty is increased. Accordingly, it is desirable to develop a method of easily and safely producing an ion exchange membrane for camphorization reaction to solve the above problems.
Disclosure of Invention
The invention aims to provide a preparation method of an ion exchange membrane for camphorization reaction, which can be used for preparing the ion exchange membrane for camphorization reaction with high catalytic efficiency more safely and has the characteristics of simple process, safety and environmental protection.
The technical scheme of the invention is as follows:
a method for preparing an ion exchange membrane for camphoresterification reaction, comprising the following steps:
(1) Taking a base film, fixing the base film, placing the base film in a reaction tank, adding immersion liquid into the reaction tank, heating and soaking the base film, and discharging the immersion liquid in the reaction tank;
(2) Adding curing liquid into the reaction tank, heating and soaking, discharging the curing liquid in the reaction tank, and wiping the upper and lower surfaces of the film and the reaction tank;
(3) Adding expansion liquid into the reaction tank, heating and soaking, and discharging the expansion liquid in the reaction tank;
(4) Adding concentrated sulfuric acid into the reaction tank, heating and soaking, cooling, and discharging the concentrated sulfuric acid in the reaction tank;
(5) Adding sulfuric acid with sequentially reduced concentration into the reaction tank for multiple times, and emptying the sulfuric acid in the reaction tank before adding the sulfuric acid each time;
(6) Adding clear water into the reaction tank, cleaning, and taking out the film from the reaction tank.
Further, in the step (1), the selected base film is a polyethylene film, and the impregnation liquid is one of styrene, divinylbenzene and xylene.
In the step (1), the temperature in the reaction tank is controlled to be 60-65 ℃ when the base film is soaked in the impregnation liquid, and the soaking is finished after the thickness of the base film is increased by 140 mm.
In the step (2), the added curing liquid is azodiisobutyronitrile, the temperature in the reaction tank is controlled to be 68-72 ℃ when the base film is soaked in the curing liquid, and the soaking time is 5 hours.
Further, in the step (3), the added expansion liquid is dichloroethane or pinene, the temperature in the reaction tank is controlled to be 48-52 ℃ when the base film is soaked in the expansion liquid, and the soaking is completed after the thickness of the base film is increased by 20 mm.
In the step (4), the temperature in the reaction tank is controlled to be 79-83 ℃ when the base film is soaked in concentrated sulfuric acid, and heating is stopped after soaking for 8 hours.
In the step (5), sulfuric acid with the concentration decreasing in sequence is added into the reaction tank for 2 times, and the concentration of the sulfuric acid added for 2 times is 25% and 15% in sequence.
Further, the method also comprises the step (7) of cutting the film according to the specification and preserving the film in a wet state.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a preparation method of an ion exchange membrane for camphorization reaction, which comprises the steps of taking a base membrane, fixing the base membrane in a reaction tank, sequentially adding immersion liquid, curing liquid, expansion liquid and concentrated sulfuric acid into the membrane for soaking reaction, and washing the base membrane by sulfuric acid and clear water with sequentially reduced concentration to obtain the ion exchange membrane for camphorization reaction. According to the method, the thickness of the film can be effectively increased, the expansion effect is better, the contact area of the catalyst is effectively increased, and the catalytic efficiency is improved by controlling the thickening condition, the temperature and the soaking time when the film is added with the impregnation liquid, the curing liquid and the expansion liquid for soaking reaction; and the concentrated sulfuric acid is utilized to acidify the acid, so that the ion exchange membrane with good catalytic performance can be obtained, the preparation difficulty in the preparation process is lower, the safety coefficient is higher, too much acid-containing wastewater can not be generated, the environment is better protected, the catalytic reaction time of the prepared ion exchange membrane is shorter, and the activity is longer.
Detailed Description
The technical scheme of the present invention will be described in further detail below with reference to the specific embodiments, but the present invention is not limited thereto.
The invention relates to a preparation method of an ion exchange membrane for camphoresterification reaction, which comprises the following steps:
(1) And taking the base film, fixing the base film, placing the base film in a reaction tank, adding the immersion liquid into the reaction tank, heating and soaking the base film, and discharging the immersion liquid in the reaction tank.
The selected base film is a polyethylene film, the base film is cut according to the specification and then is put into a reaction tank, the cut base film is required to be fixed on 2 rollers and clamped and fixed through a fastening roller on the rollers, the film is required to be fixed flatly when being rolled, a mark is required to be made on one side of the rollers, the other side of the base film is required to be fixed by a fastening roller crossing the other roller, and the rollers are fixedly placed in the reaction tank. The impregnation liquid is one of styrene, divinylbenzene and dimethylbenzene. The immersion liquid added into the reaction tank submerges two thirds of the height of the base film, the temperature in the reaction tank is controlled to be 60-65 ℃ when the base film is immersed in the immersion liquid, the roller is rotated every 3-5 minutes during immersion, so that the base film is immersed more fully, and the temperature, namely the immersion time, of the base film during immersion is controlled. Soaking until the thickness of the basal membrane is 1030-1050 mm, namely, the reaction is completed after the thickness of the basal membrane is increased by 140 mm. The discharged infusion requires barreling and placing, and the state is marked during storage. After the immersion liquid is put, 2 rollers are required to be taken out to squeeze the immersion liquid on the base film.
(2) Adding the curing liquid into the reaction tank, heating and soaking, discharging the curing liquid in the reaction tank, and wiping the upper and lower surfaces of the film and the reaction tank.
Wherein the added curing liquid is azodiisobutyronitrile, the temperature in the reaction tank is controlled to be 68-72 ℃ when the base film is soaked in the curing liquid, the soaking time is 5 hours, and the roller is rotated every 15 minutes when the base film is soaked, so that the base film is soaked more fully. The curing liquid is a solution obtained by dissolving the curing agent in water with the temperature of 70 ℃, and the added curing liquid is required to be used for 3cm after the film grinding surface is touched. After the curing liquid in the reaction tank is released, the upper and lower surfaces of the film and the inside of the reaction tank must be wiped dry, otherwise the next soaking effect is affected.
(3) Adding the expansion liquid into the reaction tank, heating and soaking, and discharging the expansion liquid in the reaction tank.
Wherein the added expansion liquid is dichloroethane or pinene, the temperature in the reaction tank is controlled to be 48-52 ℃ when the base film is soaked in the expansion liquid, and the roller is rotated every 5 minutes when the base film is soaked, so that the base film is soaked more fully. The soaking is completed after the thickness of the base film is increased by 20mm, and the base film is soaked in the expansion liquid with the temperature, so that the soaking effect is optimal. And discharging the expansion liquid out of the barrel and placing after the soaking is finished, and marking a good state for subsequent treatment during storage.
(4) Adding concentrated sulfuric acid into the reaction tank, heating and soaking, cooling, and discharging the concentrated sulfuric acid in the reaction tank.
Wherein, the temperature in the reaction tank is controlled to be 79-83 ℃ when the base film is soaked in concentrated sulfuric acid, heating is stopped after soaking for 8 hours, and the concentrated sulfuric acid is kept in the temperature range in the soaking process, so that the acidification effect of the base film can be ensured. When the concentrated sulfuric acid is put into the reaction tank, the concentrated sulfuric acid needs to be slowly added to the position of two thirds of the base film at the liquid level. The roller rotates every 15 minutes in the soaking process, so that the acidification reaction is more sufficient. When the reacted concentrated sulfuric acid is discharged, the concentrated sulfuric acid needs to be barreled and placed, and the concentrated sulfuric acid needs to be well marked when being stored.
(5) Sulfuric acid with sequentially reduced concentration is added into the reaction tank for a plurality of times, and the sulfuric acid in the reaction tank is emptied before each sulfuric acid addition.
Wherein, 2 times of sulfuric acid with the concentration decreasing in sequence is added into the reaction tank, and the concentration of the sulfuric acid added for 2 times is 25 percent and 15 percent in sequence. Every time sulfuric acid is added into the reaction tank until the liquid level is two thirds of that of the base film, the sulfuric acid in the reaction tank is discharged after the roller is shaken after the sulfuric acid is added, the discharged sulfuric acid needs to be placed in a barreled state, and the state needs to be marked when the sulfuric acid is stored.
(6) Adding clear water into the reaction tank, cleaning, and taking out the film from the reaction tank.
Preferably, clean water is added into the reaction tank for 2 times to clean, and the water in the reaction tank is emptied before the clean water is added each time.
Further, the method also comprises the step (7) of putting the obtained ion exchange membrane into a membrane soaking pool for cleaning again, then cutting according to the specification, and preserving in a wet state.
According to the preparation method of the ion exchange membrane for camphor esterification reaction, disclosed by the invention, the thickness of the membrane can be effectively increased, the expansion effect is better, the contact area of a catalyst is effectively increased, and the catalytic efficiency is improved by controlling the thickening condition, the temperature and the soaking time of the membrane when the soaking reaction is carried out by adding the impregnating liquid, the curing liquid and the expansion liquid into the membrane; and then the concentrated sulfuric acid is utilized to acidify the acid, so that the ion exchange membrane with good catalytic performance can be obtained, the preparation difficulty in the preparation process is lower, the safety coefficient is higher, too much acid-containing wastewater can not be generated, and the environment is protected. The catalytic reaction time of the prepared ion exchange membrane is 15-20% shorter than that of the existing ion exchange membrane. The activity duration time of the prepared ion exchange membrane is 12-17% longer than that of the existing ion exchange membrane, so that the performance of the ion exchange membrane prepared by the preparation method is better than that of the existing ion exchange membrane.
The foregoing description of the preferred embodiments of the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. The preparation method of the ion exchange membrane for the camphoresterification reaction is characterized by comprising the following steps of:
(1) Taking a base film, fixing the base film, placing the base film in a reaction tank, adding immersion liquid into the reaction tank, heating and soaking the base film, and discharging the immersion liquid in the reaction tank;
(2) Adding curing liquid into the reaction tank, heating and soaking, discharging the curing liquid in the reaction tank, and wiping the upper and lower surfaces of the film and the reaction tank;
(3) Adding expansion liquid into the reaction tank, heating and soaking, and discharging the expansion liquid in the reaction tank;
(4) Adding concentrated sulfuric acid into the reaction tank, heating and soaking, cooling, and discharging the concentrated sulfuric acid in the reaction tank;
(5) Adding sulfuric acid with sequentially reduced concentration into the reaction tank for multiple times, and emptying the sulfuric acid in the reaction tank before adding the sulfuric acid each time;
(6) Adding clear water into the reaction tank for cleaning, and taking out the film from the reaction tank;
the selected base film is a polyethylene film, the impregnation liquid is one of styrene, divinylbenzene and dimethylbenzene, the added curing liquid is azodiisobutyronitrile, and the added expansion liquid is dichloroethane or pinene.
2. The method for producing an ion exchange membrane for camphorization according to claim 1, wherein in the step (1), the temperature in the reaction tank is controlled to be 60-65 ℃ when the base membrane is immersed in the immersion liquid, and the immersion is completed after the thickness of the base membrane is increased by 140 mm.
3. The method for producing an ion exchange membrane for camphorization according to claim 1, wherein in the step (2), the temperature in the reaction tank is controlled to be 68-72 ℃ and the soaking time is 5 hours when the base membrane is soaked in the curing liquid.
4. The method for producing an ion exchange membrane for camphorization according to claim 1, wherein in the step (3), the temperature in the reaction tank is controlled to be 48-52 ℃ when the base membrane is immersed in the swelling liquid, and the soaking is completed after the thickness of the base membrane is increased by 20 mm.
5. The method for producing an ion exchange membrane for camphorization according to claim 1, wherein in the step (4), the temperature in the reaction tank is controlled to be 79-83 ℃ by immersing the base membrane in concentrated sulfuric acid, and heating is stopped after immersing for 8 hours.
6. The method for producing an ion exchange membrane for camphorization according to claim 1, wherein in the step (5), sulfuric acid with a concentration decreasing in order of 2 times is added to the reaction tank, and the concentration of sulfuric acid added in order of 2 times is 25% and 15%.
7. The method for producing an ion exchange membrane for camphorization according to claim 1, further comprising the step of (7) cutting the membrane to specification and preserving it in a wet state.
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