CN105418819B - The preparation method of gel type strong basic anion exchange resin - Google Patents
The preparation method of gel type strong basic anion exchange resin Download PDFInfo
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- CN105418819B CN105418819B CN201510977040.6A CN201510977040A CN105418819B CN 105418819 B CN105418819 B CN 105418819B CN 201510977040 A CN201510977040 A CN 201510977040A CN 105418819 B CN105418819 B CN 105418819B
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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
- C08F8/00—Chemical modification by after-treatment
- C08F8/18—Introducing halogen atoms or halogen-containing groups
- C08F8/24—Haloalkylation
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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
- B01J41/08—Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/12—Macromolecular compounds
- B01J41/14—Macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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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
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
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Abstract
The present invention relates to ion exchange technique field, the anion exchange resin field with shell structure is more particularly related to.The preparation method of gel type strong basic anion exchange resin, passes through chloromethylation by gel type polystyrene divinylbenzene Archon, and then aminating reaction is made, and the granularity of Archon is 825 440 um；Chloromethylation reagents are chloromethyl alkyl ethers, and chloromethylation temperature is 10 40 DEG C；The chloromethylation time is 2 48 hrs；Aminating reaction temperature is 20 60 DEG C；The aminating reaction time is the hrs of 15 min 48.The whole ball rate of strong-base anion-exchange resin is not less than 90%, and moisture is 43 ~ 51%, and volume-exchange amount is not less than 1.15 eq/L；The granularity requirements of the resin are：Resin volume proportion less than 630 um is not more than 5%, and the resin volume proportion less than 1000 um is not less than 75%, and the coefficient of uniformity of resin is not more than 1.2.
Description
Technical field
The present invention relates to ion exchange technique field, the anion exchange resin neck with shell structure is more particularly related to
Domain.
Background technology
Bunk beds ion exchange column is used to remove the ion in water.Bunk beds ion exchange column includes one layer of cation exchange
Resin and anion exchange resin.The post of the application requirement resin bed presses relatively low and resin reproduction speed very fast.
Seeding polymerization technique is a kind of method for preparing the narrower polymer Archon of Size Distribution.This method will be used as seed
Polymer Archon be distributed in aqueous media, the oil phase that the Archon is subsequently added further is swelled, under certain conditions
Polymerization.The granularity of the Archon prepared is higher, and particle diameter distribution is narrower.The resin prepared after Archon activation has machine
The advantages of tool intensity is higher, particle diameter distribution is narrow, has obvious advantage in the application of bunk beds ion exchange column.There is patent to kind
Sub- polymerization technique has carried out special elaboration（See, e.g., United States Patent (USP) 4,582,859；European patent WO85/04885；
KR20080026459（A））.Seeding polymerization technique is by adjusting the granularity and seed of seed：The proportioning of oil phase, can be prepared into
To the Archon of target particle size range.
A400DL is the preparation method of the gel type strong basic anion exchange resin of styryl, and its particle size range is
630-1200 um, the resin size than conventional particle size is thick.Not only exchange capacity is big by A400DL, and it is thicker to draw its particle size, should
Pressure drop is smaller during.But it is same because rosin size is larger, but the reproduction speed of resin is slower.
It is inert core inside shell structure, resin outer layer is the shell of activation.So that diffusion path in resin regeneration process
Shorter, reproduction speed is very fast.The A2 of patent WO 2013/052363 describe several methods for preparing shell structure resin.But arrive
The method that the Archon PA400DL not prepared so far for seeding polymerization also prepares shell resin.
The content of the invention
The present invention relates to a kind of preparation method of the strong basic type anion-exchange resin of shell structure, described thin-shell type is strong
Alkaline anion exchange resin both can in the application pressure drop it is relatively low, in turn ensure that resin reproduction speed quickly.
In order to realize above-mentioned purpose, present invention employs following technical scheme：
The preparation method of gel type strong basic anion exchange resin, the strong-base anion-exchange resin is passed through by Archon
Chloromethylation, then aminating reaction is obtained, wherein：
1）Archon
Archon selects gel type polystyrene-divinylbenzene Archon, the granularity of gel type polystyrene-divinylbenzene Archon
For 825-440 um；
2）Chloromethylation
Chloromethylation reagents are chloromethyl alkyl ethers, and chloromethylation temperature is-10-40 DEG C, preferred chloromethylation temperature
Spend for 5-20 DEG C；The chloromethylation time is the hrs of 2- 48；It is preferred that the chloromethylation time be 3-7.5 hrs；
3）Aminating reaction
Aminating reaction temperature is 20-60 DEG C, and amination temperature preferably is 20-30 DEG C；The aminating reaction time is 15 min-
48 hrs, the aminating reaction time of optimization is 6-20 hrs；
The whole ball rate of described strong-base anion-exchange resin is not less than 90%, and moisture is 43 ~ 51%, volume-exchange amount
It is not less than 1.15 eq/L；The granularity requirements of the resin are：Resin volume proportion less than 630 um is not more than 5%, is less than
1000 um resin volume proportion is not less than 75%, and the coefficient of uniformity of resin is not more than 1.2.
The preparation of above-mentioned Archon is prepared using process for suspension polymerization.Single phase is distributed in aqueous phase under stirring
It is dispersed into droplet and aggregates into the Archon being distributed with certain particle size.
The composition of aqueous phase is water and dispersant.The effect of dispersant has：1）Surface tension is reduced, monomer dispersion is helped into liquid
Drop；2）Protective effect, when preventing that particle is aggregated to certain conversion ratio, particle bonds the particle aggregation phenomenon caused.Dispersant has
Water soluble polymer and the class of inorganic powder two, including calcium phosphate, magnesium hydroxide, calcium carbonate, gelatin, cellulose ethers, polyethylene
Alcohol.
A small amount of surfactant is added in aqueous phase reduces interfacial tension to help droplet distribution, using lauryl sodium sulfate
And neopelex.
Archon is prepared using seed technique, and " seed " applied in the technique refers to the stryrene divinyl of low crosslinking degree
Benzene polymer is swelled in the oil phase of styrene-divinylbenzene monomer composition, absorbs oil phase, and further polymerization forms interpenetrating networks
Polymer.Archon prepared by this method has both sides advantage：1）Size Distribution homogeneity is preferable；2）Mechanical strength is preferable.
In order to ensure that seed fully absorbs oil phase in Archon polymerization technique of the present invention, it is desirable to which seed has preferably molten in oil phase
It is swollen.The degree of cross linking of seed is lower, and the absorption to oil phase is faster.1 when the degree of cross linking of seed is 0.5-3%, the preferred degree of cross linking-
2%。
The particle size range of seed of Archon polymerization is：710-250 um, particle size range preferably is：570—300 um.
In prepared by seeding polymerization technique, according to the granularity of seed, seed can be regulated and controled：The ratio of oil phase prepares targeted particle size
Archon.Seed：The ratio of oil phase is 3:1—1:5, seed preferably：The ratio of oil phase is 1:1—1:1.25.
The moisture of target resin is controlled by the degree of cross linking of activation condition and Archon.Seeding polymerization technique prepare in order to
The Archon of aimed graft degree is prepared, it is necessary to according to the seed of the polymerization：The content of divinylbenzene in the ratio regulation and control oil phase of oil phase.
The scope of divinylbenzene content is 2-10% in oil phase, and the content of divinylbenzene preferably is 4-7%.
Initiator in Seeded polymerization is azo-initiator and peroxide initiator, have azodiisobutyronitrile,
ABVN, dilauroyl peroxide, di-isopropyl peroxydicarbonate, dicetyl peroxydicarbonate ethylhexyl, peroxidating
The tert-butyl ester, dibenzoyl peroxide, peroxidating 2 ethyl hexanoic acid tert-butyl ester etc..
Archon polymeric reaction temperature is 50-95 DEG C of progress 2-14 hrs, and it is 6-10 that preferred temperature range, which is 70-95 DEG C,
hrs。
Archon selects gel type polystyrene-divinylbenzene Archon, and the Archon is prepared by seed technique.Granularity is
825-440 um。
In chloromethylation step, Archon activated by chloromethylation reagents to be formed with can activated group chlorine ball.The chlorine
Methylating reagent is chloromethyl alkyl ether, and structure is：ClCH2OR.Wherein, R is alkyl group, and it is 1-4 containing carbon number, also
It is chloromethyl ether, chloromethyl ethyl ether, chloromethyl propyl ether, chloromethyl butyl ether.It is preferred that, it is used as chloromethylation using chloromethyl ether
Reagent.
There are two kinds as the chloromethyl ether source of chloromethylation reagents：Using preparation directly buying and in situ.Chloromethyl ether pair
Human respiratory tract has the positions such as eyes, the skin for human body of being burnt after strong impulse, contact to have strong carcinogenicity.Directly adopt
During transport, transfer and use different degrees of leakage easily occurs for the reagent of purchase, and the body of research and development and producers are good for
Kang Zaocheng potential hazards.It is preferred that scheme be fabricated in situ.Chloromethyl ether is prepared by formaldehyde, methanol and chlorosulfonic acid.
The source of formaldehyde is paraformaldehyde and formalin.Paraformaldehyde is asked in plant operation in the presence of charging is difficult
Topic.It is preferred that scheme be to be configured to certain density formalin, the solution can be added directly by pipeline.
The solvent that chloromethylation is used to be swelled Archon is chloromethyl ether and other organic solvents.Chloromethyl ether is Archon and chlorine
The good solvent of ball, but its toxicity is stronger, and the pair crosslinking of the resin surface prepared is relatively low, mechanical strength is poor.It is preferred that
Scheme is to use other solvents, such as dimethoxym ethane and dichloroethanes.The solvent not only can preferably be swelled Archon, carry out chloromethane
Glycosylation reaction, can reduce the concentration of chloromethyl ether in reaction system, reduction disclosure risk, and the resin surface prepared again
Pair crosslinking is higher, and mechanical strength is preferable.
The catalyst of chloromethylation is Lewis acid, and the Lewis acid that can be selected is aluminium chloride（AlCl3）, zinc chloride
（ZnCl2）, iron chloride（FeCl3）, titanium chloride（TiCl4）.The catalyst activity of candidate is different, the high secondary crosslinking caused of activity
Height, a certain degree of secondary crosslinking can ensure that resin has preferable mechanical strength, and too high secondary crosslinking can cause resin activated mistake
The ratio of external expansion is different in journey, causes the problem of whole ball rate is relatively low（Blastomere or fragment）.It is preferred that catalyst be chlorination
Iron.
It is solid storage as the iron chloride storing mode of catalyst and is configured to solution preservation.Iron chloride is easy in atmosphere
Discharge hydrogen chloride and occur hydrolysis.Sour gas corrosion storage container, goes bad as the iron chloride of catalyst, catalyst
Addition is also not accurate enough, and the dispensing of solid catalyst is unfavorable for the sealing of reaction system.It is preferred that scheme be to match somebody with somebody iron chloride
Solution preservation is made.It is preferred that ferric chloride concn be 2-80%, preferred ferric chloride concn is 20-50%.
In order to prepare shell resin, chloromethylation degree is controlled.Influence the chloromethane much told tale extent of reaction
Factor is in addition to the concentration of reactant, also reaction temperature and reaction time.In order to prepare the obvious shell structure in border,
Chloromethylation temperature is-10-40 DEG C.With the rise of reaction temperature, reaction speed is accelerated, and reaches specified shell/footpath than required
The time wanted shortens, but control shell/footpath increases than the difficulty being worth for determination.From the aspect of reaction time and control difficulty two,
It is preferred that chloromethylation temperature be 0-25 DEG C.Preferred chloromethylation temperature is 5-20 DEG C
The chloromethylation time is the hrs of 2- 48.The exchange capacity of chloromethylation gathers way gradually with the time
Slow down.It is preferred that the chloromethylation time be 3-7.5 hrs.
Resin prepared by chloromethylation is referred to as chlorine ball, without ion exchanging function.The chlorine ball is partial activation, by
Inside and outside two layers of composition, kernel is inert polymer, and outside is the shell of chloromethylation.Chloromethyl ether in except dechlorination ball and highly concentrated
After the acid of degree, anion exchange resin is prepared with amine reaction, can be with the anion in exchanged water.
In order to be swelled chlorine ball, it is necessary to add organic solvent into reaction system in aminating reaction.What can be selected is organic
Solvent has dichloroethanes, dimethoxym ethane, carbon tetrachloride, carbon disulfide etc..It is preferred that dimethoxym ethane is used as organic solvent.Aminating reaction it is molten
Dimethoxym ethane or water may be selected in agent.The present invention proposes the amination method for making solvent or water as solvent with dimethoxym ethane respectively respectively.
The shell of shell resin/footpath ratio is realized by the consumption of controlling reaction temperature, reaction time and amine.
Aminating reaction temperature is 20-60 DEG C.Or about 20,21,22,23,24,25,26,27,28,29,30,31,32,33,
34、35、36、37、38、39、40、41、42、43、44、45、46、47、48、49、50、51、52、53、54、55、56、57、58、
59、60.It is preferred that amination temperature be 20-30 DEG C.
The aminating reaction time is 15 min-48 hrs, and the aminating reaction time of optimization is 6-20 hrs.
The excess percentage of trimethylamine is 10-300%.When excess percentage is relatively low, the temperature needed for target exchange capacity is reached
The higher, time is longer.When excess percentage is higher, waste raw material.It is preferred that the excess percentage of trimethylamine be 30-80%.
The present invention is as a result of above-mentioned technical scheme.The preparation of the resin includes chloromethylation and aminating reaction.For
Prepare the shell structure, the chloromethylation degree of reaction is controlled, and the chlorine ball after chloromethylation is whole aminations.The present invention
The chloromethylation condition of control, is the concentration of chloromethylation time and chloromethylation thing respectively.The invention system
Standby thin-shell type strong basic type anion-exchange resin both can in the application pressure drop it is relatively low, in turn ensure that resin regenerates speed quickly
Degree.
Brief description of the drawings
Fig. 1 is that shell structure resin prepares schematic diagram.
Fig. 2 is the picture that resin is prepared in embodiment 1.
Fig. 3 is the picture that resin is prepared in embodiment 2.
Fig. 4 is the picture that resin is prepared in embodiment 3.
Fig. 5 is the consumption that the regenerative agent needed for resin regeneration process is prepared in embodiment 3.
Fig. 6 is the picture that resin is prepared in embodiment 4.
Embodiment
The non-limiting and nonexhaustive embodiment of the present invention is described with reference to the following drawings.In order to be better understood from this hair
It is bright, will be with reference to accompanying drawing and detailed description below.
It should be understood that invention as described herein is not limited to ad hoc approach, scheme and reagent, because these alterables,
It is also to be understood that saying that the term for being is only used for describing the purpose of specific embodiment herein, it is not intended to limit the present invention's
Scope.Unless otherwise defined, otherwise whole scientific and technical terminologies used herein have the common skill with the technical field of the invention
Art personnel's is generally understood that identical connotation.It can be used in the practice or experiment of the present invention close with those described herein
Or equivalent any method or material.
Whole publications that are herein cited or referring to, including patent, patent application and other patents and non-patent go out
Version thing is expressly incorporated herein by reference at least its purpose being cited：Including for example in order to which disclosure and description can be used for this hair
The method of bright material.Publication and other bibliography are never construed as an admission that herein（Including only in technology " background parts "
Any bibliography quoted）For the prior art relative to the present invention such as because existing invention makes the present invention not have
There is the qualification earlier than the disclosure.
Skilled artisan will appreciate that numerical value presented herein is approximation.Generally unless otherwise stated, term
For example " about " and " about " include in 20% in the value of place, more preferably in 10% even more preferably in 5%.
Embodiment 1：
Paraformaldehyde solution is added into 2L four-hole boiling flasks（221 mL）, methanol（36 mL）With ferric trichloride 40%（16
mL）Solution.Stir and controlling reaction temperature is less than 20 DEG C.Chlorosulfonic acid is slowly added dropwise（105mL）And control reactor temperature not
More than 30 DEG C；Reactor is cooled to 10 DEG C.Add Archon（4.2% DVB, 800-450 um, 150 g）.10 DEG C of insulations 4
hrs.300 mL methanol are slowly added dropwise, are cooled to less than 10 DEG C.Use methanol（300 mL）Washing five times.
Chlorine ball and water are added into 2 L reactors（378.6 mL）And dimethoxym ethane（227.4 mL）.Add trimethylamine solution
（40%, 196 mL）And it is incubated 16 hrs.It is set to distillation state.Water is slowly added dropwise in still-process（227.4 mL）To keep
Mobility.15 min are incubated when being warming up to 98-100 DEG C.It is cooled to less than 70 DEG C.Water washing resin to pH be 8.30-60 min
Interior dropwise addition hydrochloric acid solution（22.3 mL 37%）.Water washing resin to pH be 5-7.Be made resin volume be 515mL, resin it is molten
The swollen factor is 3.43, and shell/footpath ratio is 0.60.
Fig. 2 is the picture of the resin prepared in embodiment 1.
Embodiment 2：
Paraformaldehyde solution is added into 2L four-hole boiling flasks（221 mL）, methanol（36 mL）With ferric trichloride 40%（16
mL）Solution.Stir and controlling reaction temperature is less than 20 DEG C.Chlorosulfonic acid is slowly added dropwise（105 mL）And control reactor temperature
No more than 30 DEG C；Reactor is cooled to 10 DEG C.Add Archon（4.2% DVB, 800-450 um, 150 g）.10 DEG C of insulations 6
hrs.300 mL methanol are slowly added dropwise, are cooled to less than 10 DEG C.Use methanol（300 mL）Washing five times.
Chlorine ball and water are added into 2 L reactors（378.6 mL）And dimethoxym ethane（227.4 mL）.Add trimethylamine solution
（40%, 196 mL）And it is incubated 16 hrs.It is set to distillation state.Water is slowly added dropwise in still-process（227.4 mL）To keep
Mobility.15 min are incubated when being warming up to 98-100 DEG C.It is cooled to less than 70 DEG C.Water washing resin to pH be 8.30-60 min
Interior dropwise addition hydrochloric acid solution（22.3 mL 37%）.Water washing resin to pH be 5-7.Be made resin volume be 555mL, resin it is molten
The swollen factor is 3.70, and shell/footpath ratio is 0.71.
Fig. 3 is the picture of the resin prepared in embodiment 2.
Embodiment 3：
Paraformaldehyde solution is added into 2L four-hole boiling flasks（221 mL）, methanol（36 mL）With ferric trichloride 40%（16
mL）Solution.Stir and controlling reaction temperature is less than 20 DEG C.Chlorosulfonic acid is slowly added dropwise（116mL）And control reactor temperature not
More than 30 DEG C；Reactor is cooled to 10 DEG C.Add Archon（4.2% DVB, 800-450 um, 150 g）.10 DEG C of insulations 6
hrs.300 mL methanol are slowly added dropwise, are cooled to less than 10 DEG C.Use methanol（300 mL）Washing five times.
Chlorine ball and water are added into 2 L reactors（378.6 mL）And dimethoxym ethane（227.4 mL）.Add trimethylamine solution
（40%, 196 mL）And it is incubated 16 hrs.It is set to distillation state.Water is slowly added dropwise in still-process（227.4 mL）To keep
Mobility.15 min are incubated when being warming up to 98-100 DEG C.It is cooled to less than 70 DEG C.Water washing resin to pH be 8.30-60 min
Interior dropwise addition hydrochloric acid solution（22.3 mL 37%）.Water washing resin to pH be 5-7.Be made resin volume be 610 mL, resin it is molten
The swollen factor is 4.07, and shell/footpath ratio is 0.81.
Fig. 4 is the picture of the resin prepared in embodiment 3.The test result of product obtained by the embodiment is listed in table
In 1：
The test result of the product of the gained of 1. embodiment of table 3
| Lot number | Unit | 1503036W |
| Whole ball rate | % | 95-2-3-0 |
| Moisture, Cl types | % | 48.94 |
| Volume-exchange amount, Cl types | eq/L | 1.19 |
| Volume-exchange amount, Cl types | eq/kg | 3.26 |
Embodiment 4：
Paraformaldehyde solution is added into 2L four-hole boiling flasks（221 mL）, methanol（36 mL）With ferric trichloride 40%（16
mL）Solution.Stir and controlling reaction temperature is less than 20 DEG C.Chlorosulfonic acid is slowly added dropwise（193 mL）And control reactor temperature
No more than 30 DEG C；Reactor is cooled to 10 DEG C.Add Archon（4.2% DVB, 800-450 um, 150 g）.10 DEG C of insulations 6
hrs.300 mL methanol are slowly added dropwise, are cooled to less than 15 DEG C.Use methanol（300 mL）Washing five times.
Chlorine ball and water are added into 2 L reactors（606mL）.Add trimethylamine solution（40%, 196 mL）And it is incubated 16
hrs.It is set to distillation state.Water is slowly added dropwise in still-process（227.4 mL）To keep mobility.It is warming up to 98-100 DEG C
The min of Shi Baowen 15.It is cooled to less than 70 DEG C.Water washing resin to pH be 8.Hydrochloric acid solution is added dropwise in 30-60 min（22.3 mL
37%）.Water washing resin to pH be 5-7.It is 680 mL that resin volume, which is made, and the expansion factor of resin is 4.53, and shell/footpath ratio is
0.74。
Fig. 6 is the picture of the resin prepared in embodiment 4.The test result of product obtained by the embodiment is listed in table
In 2：
The test result of the product of the gained of 2. embodiment of table 4
| Whole ball rate | % | 95-2-3-0 |
| Moisture, Cl types | % | 49.31 |
| Volume-exchange amount, Cl types | eq/L | 1.19 |
| Volume-exchange amount, Cl types | eq/kg | 3.30 |
Claims (1)
1. the preparation method of gel type strong basic anion exchange resin, it is characterised in that the preparation method is as follows：
Paraformaldehyde solution 221mL, methanol 36mL and ferric trichloride 40%16mL solution are added into 2L four-hole boiling flasks；Stirring is simultaneously
Controlling reaction temperature is less than 20 DEG C；Chlorosulfonic acid 116mL is slowly added dropwise and controls reactor temperature to be not more than 30 DEG C；Reactor drops
Temperature is to 10 DEG C；Add Archon, 4.2%DVB, 800-450um, 150g；10 DEG C of insulation 6hrs；300mL methanol is slowly added dropwise, cools
To less than 10 DEG C；Washed with methanol 300mL five times；
Chlorine ball and water 378.6mL and dimethoxym ethane 227.4mL are added into 2L reactors；Trimethylamine solution 40% is added, 196mL is simultaneously
It is incubated 16hrs；It is set to distillation state；Water 227.4mL is slowly added dropwise in still-process to keep mobility；It is warming up to 98-100
DEG C when be incubated 15min；It is cooled to less than 70 DEG C；Water washing resin to pH be 8；Hydrochloric acid solution 37% is added dropwise in 30-60min,
22.3mL；Water washing resin to pH be 5-7；It is 610mL that resin volume, which is made, and the expansion factor of resin is 4.07, and shell/footpath ratio is
0.81。
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| CN106188406A (en) * | 2016-07-22 | 2016-12-07 | 漂莱特（中国）有限公司 | The technique of chloromethylation without dichloroethanes prepares the method for gel strong basic anion-exchange resin |
| CN106944135A (en) * | 2017-04-14 | 2017-07-14 | 丹东明珠特种树脂有限公司 | Synthesis resin catalyst of polymethoxy dimethyl ether DMM3~8 and preparation method thereof |
| CN107138177A (en) * | 2017-05-26 | 2017-09-08 | 丹东明珠特种树脂有限公司 | Methanol extraction water depickling resin catalyst prepared by methyl tertiary butyl ether(MTBE) and preparation method thereof |
| CN109174208A (en) * | 2018-08-30 | 2019-01-11 | 深圳市纯水号水处理科技有限公司 | A kind of resin adsorption removal trace metal ion solution |
| CN111269339A (en) * | 2020-01-21 | 2020-06-12 | 广西大学 | Silicon-based anion exchange resin and preparation method thereof |
| CN111939882B (en) * | 2020-09-03 | 2021-11-30 | 昌果生物医药科技河北有限公司 | Method for preparing adsorption resin by using chloroacetyl chloride and application of method in bilirubin adsorption |
| CN117229445B (en) * | 2023-09-20 | 2024-04-09 | 南京大学 | Weak base anion exchange resin with high ion exchange capacity and preparation method and application thereof |
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| US4582859A (en) * | 1983-12-02 | 1986-04-15 | Rohm And Haas Company | Process for producing an expanded seed copolymer and product therefrom |
| IL74893A0 (en) * | 1984-04-23 | 1985-07-31 | Dow Chemical Co | Process for the preparation of ion exchange resins using seeded polymerization technology |
| US8822554B2 (en) * | 2011-10-04 | 2014-09-02 | Purolite Corporation | Aminated ion exchange resins and production methods thereof |
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