CN114522742A - Preparation process of desulfurization amine liquid purification resin - Google Patents
Preparation process of desulfurization amine liquid purification resin Download PDFInfo
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- CN114522742A CN114522742A CN202210147574.6A CN202210147574A CN114522742A CN 114522742 A CN114522742 A CN 114522742A CN 202210147574 A CN202210147574 A CN 202210147574A CN 114522742 A CN114522742 A CN 114522742A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
- B01J41/05—Processes using organic exchangers in the strongly basic form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/60—Cleaning or rinsing ion-exchange beds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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Abstract
The invention discloses a preparation process of desulfurized amine liquid purification resin, which relates to the field of ion exchange resin and comprises the following steps: the method comprises the following steps: synthesizing a polymer; step two: preparing an oil phase mixture; step three: suspension polymerization and heat preservation; step four: sieving the polymer microspheres; step five: the porogen is removed and treated with lye. The invention comprehensively optimizes the functional groups and the pore structure of the strong-base anion exchange resin, synthesizes the strong-base anion exchange resin with better anti-pollution performance, obviously prolongs the service life of the resin in the application of removing heat-stable salt in amine liquid, and has easier backwashing and lower regeneration energy consumption than other resins in the aspect of regeneration when amine liquid purification is carried out.
Description
Technical Field
The invention relates to the field of ion exchange resin, in particular to a preparation process of desulfurized amine liquid purification resin.
Background
At present, natural gas, coking waste gas, gasoline, liquefied petroleum gas and the like are desulfurized and decarbonized by a most common process that the gases are contacted with an aqueous solution of alkylol amine, hydrogen sulfide, carbon dioxide and other weakly acidic gases absorbed by the amine solution can be released at high temperature and recycled, the amine solution can be regenerated and reused, the alkylol amine can be oxidized into amino acid, pigment and other complex organic matters in a repeated high-temperature treatment process, and salts formed by the acid and the alkylol amine cannot be decomposed at high temperature, so the salts are conventionally called as heat-stable salts, and the accumulation of the heat-stable salts in the amine solution not only reduces the desulfurization and decarbonization capacity of the amine solution, but also causes serious corrosion to equipment, so the heat-stable salts in the amine solution must be removed in time.
The heat stability salt in the existing amine liquid is removed by using strong base anion exchange resin, but because of the complexity of the heat stability salt, the used strong base anion exchange resin is easy to be polluted, so that the service life of the resin is relatively short, and the treatment cost of the amine liquid is relatively high.
Disclosure of Invention
Based on the above, the invention aims to provide a preparation process of a desulfurization amine liquid purification resin, so as to solve the technical problems that the existing strong-base anion exchange resin is easy to be polluted due to the complexity of heat stability salt, so that the service life is shortened, and the amine liquid treatment cost is high.
In order to realize the purpose, the invention provides a preparation process of desulfurization amine liquid purification resin, which comprises the following steps:
the method comprises the following steps: polymerizing 80-90 wt% of styrene and/or acrylic acid base body, 4-12 wt% of cross-linking agent and 0.1-2 wt% of initiator to synthesize polymer, adding 50-100 wt% of monomer macroporous pore-forming agent in the polymerization process of the polymer, and heating to 80-90 ℃ after the macroporous pore-forming agent is completely dissolved;
step two: adding 0.2-1.2% by mass of peroxide free radical polymerization initiator and 0.2-1.2% by mass of azo free radical polymerization initiator into the mixture obtained in the first step after heating, and stirring to dissolve and uniformly mix the mixture to obtain an oil phase mixture;
step three: adding the oil phase mixture obtained in the step two into a water phase at 80-90 ℃, then stirring and adjusting the stirring speed to enable the size of oil droplets to be moderate, then carrying out heat preservation reaction at 80-90 ℃ for 6 hours, and then heating to 96-99 ℃ for carrying out heat preservation reaction for 3 hours, wherein the percentage content of divinylbenzene in the monomer mixture is preferably 4-10%;
step four: washing the polymer obtained in the third step with cooling water, drying, and screening out polymer microspheres with proper particle size;
step five: and removing the pore-foaming agent from the polymer microspheres obtained in the fourth step in a distillation or extraction mode, and performing chloromethylation and dimethylethanolamine amination to obtain the strong base II-type treated desulfurized amine liquid purification resin.
By adopting the technical scheme, the functional groups and the pore structure of the strong-base anion exchange resin are comprehensively optimized, the strong-base anion exchange resin with better anti-pollution performance is synthesized, the service life of the resin in the application of removing heat-stable salt in amine liquid is obviously prolonged, the amine liquid is easier to backwash in the regeneration aspect than other resins when the amine liquid is purified, and the regeneration energy consumption is lower.
The invention is further provided that the amount of the macroporous pore-forming agent used in the first step is generally 20-200% by mass of the monomer, preferably 50-100%.
The invention further provides that the percentage of divinylbenzene in the monomer mixture in the third step is generally 2 to 20%, preferably 4 to 10%.
The invention further provides that the fifth step can be performed by using a strong alkali I-type aminated by trimethylamine or a strong alkali II-type aminated by dimethylethanolamine, preferably a strong alkali II-type aminated by dimethylethanolamine.
The invention is further configured that, in the polymerization process of the polymer in the first step, under the action of the macroporous pore-forming agent, a skeleton with a uniformly distributed macroporous spongy structure is formed, and the average pore diameter of the macroporous channels is 600-1600 nm.
The invention further provides that the cross-linking agent in the first step is a free radical polymerization monomer with two or more double bonds, and can be one or more of divinylbenzene, trivinylbenzene, triallyl isocyanate and diallyl diethylene glycol ether in any combination.
The invention is further configured that the initiator in the first step is a free radical polymerization initiator which comprises peroxides, azos, disulfides, redox initiators, bifunctional and polyfunctional initiators, and macromolecules.
The invention further provides that the peroxide radical polymerization initiator comprises one or more of benzoyl peroxide, tert-butyl peroxybenzoate, tert-amyl peroxybenzoate, diisobutyl peroxydicarbonate, dicyclohexyl peroxydicarbonate and diester peroxydicarbonate in any combination.
The invention further provides that the azo free radical polymerization initiator comprises one or more of azodiisobutyronitrile, azodiisoheptonitrile, azodiisovaleronitrile and azodiisobutyrate methyl ester in any combination.
The invention is further provided that the macroporous pore-forming agent in the step one can be one or more of toluene, alkanes of C6-C18, alcohols and esters of C4-C8, linear polystyrene, polymethyl acrylate and other polymers.
In summary, the invention mainly has the following beneficial effects:
the invention synthesizes the strong-base anion exchange resin with better anti-pollution performance by comprehensively optimizing the functional groups and the pore structure of the strong-base anion exchange resin, so that the service life of the resin in the application of removing heat-stable salt in amine liquid is obviously prolonged, the amine liquid is easier to backwash in the regeneration aspect than other resins when the purification is carried out, and the regeneration energy consumption is lower.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The following examples are illustrative only and are not to be construed as limiting the invention.
The following describes an embodiment of the present invention based on its overall structure.
Example one
A preparation process of desulfurization amine liquid purification resin comprises the following steps:
the method comprises the following steps: polymerizing 80-90 wt% of styrene and/or acrylic acid base body, 4-12 wt% of cross-linking agent and 0.1-2 wt% of initiator to synthesize polymer, adding 50-100 wt% of macroporous pore-forming agent in the polymerization process of the polymer, heating to 80-90 ℃ after the macroporous pore-forming agent is completely dissolved, forming a skeleton with uniformly distributed macroporous spongy structure under the action of the macroporous pore-forming agent in the polymerization process of the polymer, wherein the macroporous pore-forming agent can be one or more of toluene, C6-C18 alkane, C4-C8 alcohol and ester thereof, linear polystyrene, polymethyl acrylate and other polymers, the using amount is generally 20-200 wt% of the monomer, preferably 50 to 100%, wherein the crosslinking agent is a radical polymerizable monomer having two or more double bonds, can be one or more of divinylbenzene, trivinylbenzene, triallyl isocyanate and diallyl diethylene glycol ether in any combination, the initiator is a free radical polymerization initiator comprising peroxides, azos, disulfides, redox initiators, bifunctional groups, polyfunctional groups and macromolecules, the peroxide free radical polymerization initiator comprises one or more of benzoyl peroxide, tert-butyl peroxybenzoate, tert-amyl peroxybenzoate, diisobutyl peroxydicarbonate, dicyclohexyl peroxydicarbonate and diester peroxydicarbonate, and the azo free radical polymerization initiator comprises one or more of azobisisobutyronitrile, azobisisoheptonitrile, azobisisovaleronitrile and methyl azobisisobutyrate;
step two: adding 0.2-1.2% by mass of peroxide free radical polymerization initiator and 0.2-1.2% by mass of azo free radical polymerization initiator into the mixture obtained in the first step after heating, and stirring to dissolve and uniformly mix the mixture to obtain an oil phase mixture;
step three: adding the oil phase mixture obtained in the step two into a water phase at 80-90 ℃, then stirring and adjusting the stirring speed to enable the size of oil drops to be proper, then carrying out heat preservation reaction for 6 hours at 80-90 ℃, and then heating to 96-99 ℃ for carrying out heat preservation reaction for 3 hours, wherein the percentage of the divinylbenzene in the monomer mixture is preferably 4-10%, and the percentage of the divinylbenzene in the monomer mixture is generally 2-20%, preferably 4-10%;
step four: washing the polymer obtained in the third step with cooling water, drying, and screening out polymer microspheres with proper particle size;
step five: and removing the pore-foaming agent from the polymer microspheres obtained in the fourth step by distillation or extraction, and performing chloromethylation and dimethylethanolamine amination to obtain the strong base II-type treated desulfurized amine liquid purification resin, wherein the strong base I-type subjected to trimethylamine amination or the strong base II-type subjected to dimethylethanolamine amination can be selected, and the strong base II-type subjected to dimethylethanolamine amination is preferably selected.
Example two
Three typical amine liquids from a refinery were selected and applied to the resin of the present invention for resin anti-fouling capability testing.
1. The selected amine liquid comprises the following components:
firstly, desulfurizing amine liquid in a catalytic device of an oil refinery: the appearance was pale yellow and transparent, with a heat stable salt content of about 3.5%. The characteristics of the amine liquid meet the conditions of a catalytic device and a decarburization device of a synthesis gas plant of most oil refineries.
Secondly, desulfurizing amine liquid of a hydrogenation combination device of a certain oil refinery: the appearance was yellow and turbid, and there was demixing upon standing for a period of time, with a heat stable salt content of about 4% and an oil content of about 500 ppm. The amine liquid is characterized in that oil is mixed, the amine liquid is seriously foamed, and the desulfurization effect is poor.
③ desulfurization amine liquid of coking unit of certain oil refinery: the amine liquid has the characteristics that a large amount of solid particles exist, the foaming of the amine liquid is aggravated, the generation rate of the heat stable salt is high, and the corrosion is aggravated.
2. Taking 10mL of the resin of the invention and 10mL of other resin respectively for a comparison test, purifying the three amine liquids of the first resin, the second resin and the third resin respectively by the two resins, and observing the attenuation condition of the working exchange capacity of the two resins, wherein the corresponding test data are as follows:
TABLE I amine liquid test comparative data
| Type of resin | Initial working exchange capacity mol/L | Capacity of exchange after 50 cycles of purification mol/L | Capacity of exchange after 100 cycles of purification mol/L | Capacity of working exchange after 200 cycles of purification mol/L | Capacity of working exchange after 500 cycles of decontamination mol/L |
| The invention tree Fat and oil | 0.6 | 0.58 | 0.56 | 0.54 | 0.50 |
| Others | 0.7 | 0.62 | 0.54 | 0.43 | 0.31 |
TABLE II amine liquid test comparison data
| Type of resin | Initial working exchange capacity mol/L | Capacity of exchange after 50 cycles of purification mol/L | Capacity of exchange after 100 cycles of purification mol/L | Capacity of working exchange after 200 cycles of purification mol/L | Capacity of working exchange after 500 cycles of decontamination mol/L |
| The invention tree Fat and oil | 0.6 | 0.54 | 0.52 | 0.48 | 0.43 |
| Others | 0.7 | 0.57 | 0.51 | 0.38 | 0.18 |
Comparative data of amine liquid test
| Type of resin | Initial working exchange capacity mol/L | Capacity of exchange after 50 cycles of purification mol/L | Capacity of exchange after 100 cycles of purification mol/L | Capacity of working exchange after 200 cycles of purification mol/L | Capacity of working exchange after 500 cycles of decontamination mol/L |
| The invention tree Fat and oil | 0.6 | 0.54 | 0.52 | 0.48 | 0.43 |
| Others | 0.7 | 0.57 | 0.51 | 0.38 | 0.18 |
TABLE IV. amine liquid line filtered purification test comparison data
| Type of resin | Initial working exchange capacity mol/L | Capacity of exchange after 50 cycles of purification mol/L | Capacity of exchange after 100 cycles of purification mol/L | Capacity of working exchange after 200 cycles of purification mol/L | Capacity of working exchange after 500 cycles of decontamination mol/L |
| The invention tree Fat and oil | 0.6 | 0.56 | 0.54 | 0.51 | 0.45 |
| Others | 0.7 | 0.60 | 0.52 | 0.42 | 0.23 |
From the test data in tables one to four, the following conclusions can be drawn:
and conclusion one: by purifying amine liquid of different devices by using the resin and other resins respectively, the attenuation phenomenon of the working exchange capacity of the two resins is found, but the resin has stronger anti-pollution capacity;
and a second conclusion: as for amine liquid I, the amine liquid has good quality, and when the purification period is 500, the working exchange capacity of the resin is attenuated to 0.5mol/L from 0.6mol/L, and the loss is about 16.7%. While other resins work with exchange capacity decayed from 0.7 to 0.31, with a loss of about 65%; (to ensure optimum desalination efficiency, the resin is typically replaced when the resin is used and the working exchange capacity is less than 0.3 mol/L.)
And conclusion three: for amine liquid II, oil is mixed in, and when the purification period is 500, the working exchange capacity of the resin is attenuated to 0.41mol/L from 0.6mol/L, and the loss is about 31.7 percent. While the working exchange capacity of other resins is reduced from 0.7 to 0.18, and the loss is 74.3 percent;
and conclusion four: for amine liquid III, a large amount of coke powder and iron ions exist, and when the purification period is 500, the working exchange capacity of the resin is attenuated to 0.43mol/L from 0.6mol/L, and the loss is about 28.3%. While other resins work with exchange capacity decayed from 0.7 to 0.18, with a loss of about 74.3%;
and a fifth conclusion: and (4) filtering the amine liquid III to change the amine liquid III into reddish brown, eliminating interference of coke powder, and observing iron pollution. During 500 purification periods, the working exchange capacity of the resin is attenuated from 0.6mol/L to 0.45mol/L, and the loss is about 25%. While other resins work with exchange capacity decayed from 0.7 to 0.23 with a loss of about 67.1%.
EXAMPLE III
Resin regeneration tests were performed.
In the process of a resin anti-pollution test, regenerating the resin by adopting 15mL of alkali liquor with the concentration of 4%, flushing the regenerated resin by using desalted water until the outlet conductance is less than 800 mu s/cm, counting the total backwashing water amount of 500 times of regeneration because the difference of the water amount in a single period is not obvious, and recording.
| Type of resin | Water consumption L for amine liquid | Ammonia liquor water consumption L | Water consumption L for No. III amine liquid |
| Resins of the invention | 15.3 | 17.8 | 17.6 |
| Others | 18.5 | 22.5 | 23.0 |
TABLE 3 Total backwash water usage record table after 500 cycles of amine liquid purification
From the test data in table five, the following conclusions can be drawn:
conclusion one: other resins are used in greater amounts than the resin of the present invention.
And a second conclusion: amine liquid, when adopting the resin of the invention to purify, the average amount of backwashing water per period is about 3.1 times of the amount of the used resin; when other resins were used for purging, the average amount of backwash water per cycle was about 3.7 times the amount of resin used.
And conclusion three: ② amine liquid, when adopting the resin of the invention to purify, the average backwashing water amount per period is about 3.6 times of the resin amount; with other resin purges, the average amount of backwash water per cycle was about 4.5 times the amount of resin used.
And conclusion four: ③ amine liquid, when the resin is used for purification, the average amount of backwashing water per period is about 3.5 times of the amount of the used resin; with other resin purges, the average amount of backwash water per cycle was about 4.6 times the amount of resin used.
According to experimental data of the second embodiment and the third embodiment, for 3 typical amine liquids, the resin of the invention is better in anti-pollution performance and longer in service life than other resins; the amine liquid purification by adopting the resin of the invention is easier to back flush than other resins in the regeneration aspect, and the energy consumption is reduced.
Although embodiments of the present invention have been shown and described, it is intended that the present invention should not be limited thereto, that the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples, and that modifications, substitutions, variations or the like, which are not inventive and may be made by those skilled in the art without departing from the principle and spirit of the present invention and without departing from the scope of the claims.
Claims (10)
1. A preparation process of desulfurization amine liquid purification resin is characterized by comprising the following steps: the preparation process comprises the following steps:
the method comprises the following steps: polymerizing 80-90 wt% of styrene and/or acrylic acid base body, 4-12 wt% of cross-linking agent and 0.1-2 wt% of initiator to synthesize polymer, adding 50-100 wt% of monomer macroporous pore-forming agent in the polymerization process of the polymer, and heating to 80-90 ℃ after the macroporous pore-forming agent is completely dissolved;
step two: adding 0.2-1.2% by mass of peroxide free radical polymerization initiator and 0.2-1.2% by mass of azo free radical polymerization initiator into the mixture obtained in the first step after heating, and stirring to dissolve and uniformly mix the mixture to obtain an oil phase mixture;
step three: adding the oil phase mixture obtained in the step two into a water phase at 80-90 ℃, then stirring and adjusting the stirring speed to enable the size of oil droplets to be moderate, then carrying out heat preservation reaction at 80-90 ℃ for 6 hours, and then heating to 96-99 ℃ for carrying out heat preservation reaction for 3 hours, wherein the percentage content of divinylbenzene in the monomer mixture is preferably 4-10%;
step four: washing the polymer obtained in the third step with cooling water, drying, and screening out polymer microspheres with proper particle size;
step five: and removing the pore-foaming agent from the polymer microspheres obtained in the fourth step in a distillation or extraction mode, and performing chloromethylation and dimethylethanolamine amination to obtain the strong base II-type treated desulfurized amine liquid purification resin.
2. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: the dosage of the macroporous pore-foaming agent in the step one is generally 20-200% of the mass percent of the monomer, preferably 50-100%.
3. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: the percentage of divinylbenzene in the monomer mixture in the third step is generally 2 to 20%, preferably 4 to 10%.
4. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: in the fifth step, strong alkali I-type aminated by trimethylamine or strong alkali II-type aminated by dimethylethanolamine can be selected, and strong alkali II-type aminated by dimethylethanolamine is preferred.
5. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: in the polymerization process of the polymer in the first step, a skeleton with a uniformly distributed large pore channel spongy structure is formed under the action of a large pore-foaming agent, and the average pore diameter of the large pore channel is 600-1600 nm.
6. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: the cross-linking agent in the first step is a free radical polymerization monomer with two or more double bonds, and can be one or more of divinylbenzene, trivinylbenzene, triallyl isocyanate and diallyl diethylene glycol ether in any combination.
7. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: the initiator in the first step is a free radical polymerization initiator which comprises peroxides, azos, disulfides, redox initiators, bifunctional and polyfunctional groups, and macromolecules.
8. The process for preparing desulfurization amine liquid purification resin according to claim 7, wherein: the peroxide radical polymerization initiator comprises one or more of benzoyl peroxide, tert-amyl peroxybenzoate, diisobutyl peroxydicarbonate, dicyclohexyl peroxydicarbonate and diester peroxydicarbonate in any combination.
9. The process for preparing desulfurization amine liquid purification resin according to claim 7, wherein: the azo free radical polymerization initiator comprises one or more of azodiisobutyronitrile, azodiisovaleronitrile and azodiisobutyrate methyl ester in any combination.
10. The preparation process of the desulfurization amine liquid purification resin according to claim 1, characterized in that: the macroporous pore-forming agent in the first step can be one or more of toluene, C6-C18 alkane, C4-C8 alcohols and esters thereof, linear polystyrene, polymethyl acrylate and other polymers.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5788864A (en) * | 1995-02-24 | 1998-08-04 | Mpr Services | Amine heat stable salt removal from type II anion exchange resin |
| CN103387629A (en) * | 2012-05-07 | 2013-11-13 | 江苏苏青水处理工程集团有限公司 | High-strength ion exchange resin with double-channel macroporous structure and preparation method thereof |
| CN104725541A (en) * | 2015-02-12 | 2015-06-24 | 杭州多能环保科技有限公司 | Preparation method of ion exchange resin for removing thermostable salt in alcohol amine solution |
| CN106432573A (en) * | 2016-09-27 | 2017-02-22 | 南京工程学院 | Macroporous strong-alkalinity anion exchange resin and preparation method thereof |
| CN107216415A (en) * | 2017-06-14 | 2017-09-29 | 中国石油化工股份有限公司 | A kind of preparation method for adsorbing the resin of anion in the steady salt of heat in amine liquid |
-
2022
- 2022-02-17 CN CN202210147574.6A patent/CN114522742A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5788864A (en) * | 1995-02-24 | 1998-08-04 | Mpr Services | Amine heat stable salt removal from type II anion exchange resin |
| CN103387629A (en) * | 2012-05-07 | 2013-11-13 | 江苏苏青水处理工程集团有限公司 | High-strength ion exchange resin with double-channel macroporous structure and preparation method thereof |
| CN104725541A (en) * | 2015-02-12 | 2015-06-24 | 杭州多能环保科技有限公司 | Preparation method of ion exchange resin for removing thermostable salt in alcohol amine solution |
| CN106432573A (en) * | 2016-09-27 | 2017-02-22 | 南京工程学院 | Macroporous strong-alkalinity anion exchange resin and preparation method thereof |
| CN107216415A (en) * | 2017-06-14 | 2017-09-29 | 中国石油化工股份有限公司 | A kind of preparation method for adsorbing the resin of anion in the steady salt of heat in amine liquid |
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Application publication date: 20220524 |