CN103554525A - Method for quickly and continuously preparing high-molecular-weight polyacrylamide - Google Patents
Method for quickly and continuously preparing high-molecular-weight polyacrylamide Download PDFInfo
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Abstract
The invention relates to a method for quickly and continuously preparing high-molecular-weight polyacrylamide. According to the method, microwaves are introduced into a belt type reactor, so that the problems that during a kettle type reaction, the heat of polymerization is difficult to discharge, a colloid is difficult to take out and the monomer residual volume is high are solved, and the microwaves are favorable for improving the production efficiency of polyacrylamide. The method has the main technical features that an acrylamide (AM) aqueous solution or an AM aqueous solution, a comonomer aqueous solution, an auxiliary agent, a chain transfer agent and the like are added into a blending tank according to a certain mass ratio, the blending tank is adjusted to a certain temperature, nitrogen is inflated to remove oxygen for a certain period of time, then the solution in the blending tank and an initiating agent solution are continuously added to a conveying belt at a certain speed, and a continuous polymerization reaction is performed by controlling the temperature, wherein the conveying belt is subjected to oxygen removal by using nitrogen and runs at a certain speed. A formed polymer colloid is subjected to pelletizing, drying and crushing to obtain white polymer powder with high molecular weight and good water solubility. The method disclosed by the invention is simple in process, has the advantages of environmental protection and energy conservation, and can greatly improve the production efficiency and reduce the production cost.
Description
Technical field
The present invention relates to quick serialization and prepare the method for water-soluble polymers; what be specifically related to is the quick continuous reaction of polyacrylamide; prepared polyacrylamide is mainly used in water treatment field to reach protection of the environment and water-saving object, belongs to chemical technology field.
Background technology
Polyacrylamide is the general designation of homopolymer and the multipolymer of acrylamide and derivative thereof.Conventionally industrial by the polymkeric substance that contains 50% above acrylamide monomer general term polyacrylamide all.Aqueous solution polymerization be industrial employing the earliest and the production method of the polyacrylamide of using till today, have simple to operately, polymer yield is high, the feature that safety and environmental pollution are little.
Mass polymerization still is simple, the most the most frequently used equipment of aqueous solution polymerization, but is also the equipment that least easily solves heat dissipation problem.For example, patent CN1746198A is controlled at monomer concentration below 35%, and initial kick off temperature, at 5 ~ 25 ℃, the top temperature of polymerization system is maintained below 90 ℃, but polymerization time is longer, conventionally needs 5-11 h.Patent CN1865298A adopts composite initiation system, and kick off temperature is controlled to 0 ℃ of left and right, and most of reaction times can make temperature of reaction be controlled at 60 ℃ of left and right, yet in order to reduce monomer residual volume, still reaction is reaching top temperature conventionally, also needs aging for some time, at least 1 h.Whole autoclave polymerization length consuming time, is unfavorable for saving energy and reduce the cost.The form of kneader that polymeric kettle is made also having, the blade of kneader is hollow, and the chuck of kneader plays the effect cooling jointly.Although kneader formula polymeric kettle is that polyreaction and granulation are placed in same still and are carried out, can partly reduce macromolecular chain cut probability in pelletization, the power consumption of this still is too large, and scale can not be done greatly.
Belt sheet polymerization technique not only can overcome the shortcoming that mass polymerization is difficult for heat radiation, can also serialization produce.For example, United States Patent (USP) U.S.P 4325794 adopts visible light photosensitizer and thermal initiator, by continuous reaction, successfully synthesizes high-concentration water-soluble polymkeric substance.The acrylamide of patent J. P. 77990 employings 78% and sodium acrylate copolymerization on travelling belt of 22%, the residence time of material on travelling belt is 65 min, every batch can reach 4600 kg.The cut probability that interrupts macromolecular chain in the time of can also reducing aggregation colloid granulation by the polymeric thickness of control sheet due to belt sheet polymerization technique, improve the quality of product, therefore, this polymerization process still has good prospect, can greatly enhance productivity.Patent CN1448414A discloses a kind of continuous aqueous solution polymerization technique of polyacrylamide, although this technique has solved heat dissipation problem, but need to extend the reaction times improves the transformation efficiency of monomer, adopt in addition heat transfer water, monomer solution must be encapsulated in plastics film, cause production process complicated.
Because the PAM colloid generating does not readily conduct heat, in order to reduce monomer remnants, traditional digestion time is long, and for this reason, we are incorporated into the microwave with homogeneous heating in continuous device.Compare with traditional heating, microwave heating has the features such as homogeneous heating, speed is fast, control is timely, be quick on the draw, and is not only conducive to improve the transformation efficiency of monomer, and Reaction time shorten, enhances productivity, and has the plurality of advantages such as energy environmental protection.
Summary of the invention
The object of this invention is to provide a kind of method that can make fast the continuous reaction of the polyacrylamide that high molecular, favorable solubility and monomer residual volume are few.
To achieve these goals, the present invention adopts following scheme:
(1) acrylamide (AM) aqueous solution or the AM aqueous solution, the comonomer aqueous solution, solubility promoter, chain-transfer agents etc. add in material-compound tank than respectively by certain mass, wherein monomer mass concentration is 15 ~ 40%, regulate material-compound tank to certain temperature, after inflated with nitrogen deoxygenation certain hour, add initiator, continue deoxygenation certain hour, then the solution in dosing vessel joins in the belt reactor moving except the speed with certain of peroxide with nitrogen continuously with certain speed, successive polymerization 15-90 min at 0-85 ℃ of temperature, then enter microwave reactor, successive polymerization 3-30 min at 40 ~ 90 ℃ of temperature, form polyacrylamide or polyacrylamide copolymer colloid, the thickness of colloid is 2 ~ 20 mm.
(2), from microwave reaction device polyacrylamide or polyacrylamide copolymer colloid out, send into tablets press, being a granulated into diameter is the little colloid of 2-5 mm.
(3), drying temperature 40-100 ℃, in drying plant, be dried 4-16 h, obtain the small-particle of solid-state polyacrylamide or polyacrylamide copolymer.
(4), pulverize dry solid-state polyacrylamide or the small-particle of polyacrylamide copolymer, obtain white diffluent polymer powder.
The present invention adopts acrylamide or acrylamide and other monomer to carry out aqueous solution polymerization, and the mass concentration of monomer whose is 15 ~ 50%, and preferred concentration is 20 ~ 40%.With the monomer of acrylamide copolymerization can be dimethyl diallyl ammonium chloride (DMDAAC), methyl-propyl acyl-oxygen ethyl-trimethyl salmiac (DMC), acrylyl oxy-ethyl-trimethyl salmiac (DAC), vinylformic acid-2-(N, N-dimethylamino) ethyl ester (DMA), acrylyl oxy-ethyl dimethyl benzyl ammonium chloride (DBC), sodium acrylate, 2-acrylamide-2-methylpro panesulfonic acid (AMPS) etc. can carry out all monomers of radical polymerization, add different monomers, can produce non-ionic polyacrylamide, cationic-type polyacrylamide, amphiprotic polyacrylamide, anion-polyacrylamide etc.
Initiator of the present invention is polynary initiator, the composite initiator system that can be formed by oxidation-reduction agent and water-soluble azo class initiator, also can be that oxidation-reduction trigger system or water-soluble azo class initiator form composite initiation system, wherein oxygenant is persulphate, as Potassium Persulphate, ammonium persulphate or Sodium Persulfate, be preferably ammonium persulphate, add-on is 0.001 ~ 1% of acrylamide or various of monomer quality, and preferred version is 0.005 ~ 0.5%; Reductive agent is sulphite, as S-WAT, ammonium sulphite, potassium sulfite, sodium bisulfite, Potassium hydrogen sulfite, Sodium Metabisulfite, potassium metabisulfite etc., preferred sodium bisulfite, add-on is 0.0005 ~ 1% of monomer mass, reductive agent can be also organic amine, as: quadrol, diethylamine, triethylamine, pyridine etc., preferably its add-on of triethylamine is 0.01 ~ 1.0%; Water-soluble azo class initiator can be two (two the narrow base propane) dihydrochlorides (V-44), 4 of azo diisobutyl amidine hydrochloride (V-50), azo, 4'-azo two (4-cyanopentanoic acid) (V-501), azo two isopropylformic acid two formicesters (V-601) etc., preferred azo diisobutyl amidine hydrochloride, add-on is 0.001 ~ 1% of monomer mass, and preferred version is 0.005 ~ 1.0%.Solubility promoter is urea or thiocarbamide, is preferably urea, and add-on is monomer mass 1 ~ 10%, and preferred version is 4 ~ 8%.Chain-transfer agent is Thiovanic acid, Sodium Benzoate, sodium formiate, mercaptan, Virahol, sorbyl alcohol, oxyacetic acid etc., these chain-transfer agents can be independent uses, also can mix use, its consumption is 0.005 ~ 1% of acrylamide or acrylamide comonomer quality.
Reaction involved in the present invention all need to be carried out under inert atmosphere, and preferred rare gas element is high pure nitrogen.Polymerization temperature of the present invention can specifically be set according to polymerization kind.In addition, microwave heating installation of the present invention, can make colloid be heated evenly, and is conducive to improve the transformation efficiency of monomer, thereby reduces the residual volume of monomer.
Polymerizing reactor of the present invention; by the dosing vessel 1 that control valve 2 is housed, control the distributor 3 of thickness of liquid film, insulation can 4; roller bearing 10; polytetrafluoro travelling belt 8 with raised brim 9 forms, and by well heater 7, controls the kick off temperature of polymerization system; polymerization is carried out to a certain degree; reaction mass enters the microwave reaction system 6 that two ends are furnished with microwave suppressor having 5, and last colloid is peeled off from travelling belt by scraper 11, enters tablets press.
Owing to having adopted above-mentioned polymerization process and polymerizing reactor, tool of the present invention has the following advantages:
1, adopt segmentation initiated polymerization, overcome polyacrylamide or polyacrylamide copolymer molecular weight is low, molecular weight distribution is wide and cross-linking agent is many shortcoming, improved the water-soluble of polymkeric substance.
2, adopt microwave heating, overcome colloid and be heated inhomogeneously, the problem that monomer residual volume is high, adopts belt reactor in addition, not only makes colloid take out easily, also help the derivation of heat of polymerization, and equipment is simple, simple to operate, energy-conserving and environment-protective.
3, realize continuous production, greatly improved labour productivity, reduced production cost.
Therefore, adopt processing method of the present invention and polymerizing reactor, can produce that high molecular, narrow molecular weight distribution, monomer residual volume are few, the polyacrylamide amine product of good water solubility.And performance is better than the serialization polymerization process of conventional heating.
Accompanying drawing explanation
Fig. 1 is quick continuously preparing poly acrylamide device schematic diagram.Numerical reference is explained as follows:
Wherein 1: polymerizing reactor dosing vessel, 2: control valve, 3: control the distributor of thickness of liquid film, 4: insulation can, 5: microwave suppressor having, 6: microwave reaction system, 7: well heater, 8: polytetrafluoro travelling belt, 9 travelling belt raised brim, 10: roller bearing, 11: scraper.
concrete embodiment
embodiment mono-
By 50% AM solution 2000.00g, urea 40.00 g, disodium ethylene diamine tetraacetate 0.30 g, 0.60 g Virahol and 1930.00 g deionized waters join in material-compound tank, after logical nitrogen deoxygenation 30 min, 20.00 g 1% ammonium persulfate solutions are adopted and joined in material-compound tank, continue logical nitrogen 10 min, the sodium sulfite solution of mixing solutions and 10.00 g 1% is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, under normal temperature and microwave condition, react respectively 50 min, finally obtain the gluey PAM of water white transparency through granulation, after being dried and pulverizing, obtain white powder.After dry, the molecular weight of powder is 1043.5 ten thousand, dissolution time 150 min, monomer residual volume 0.04%.
embodiment bis-
50% AM solution 2000.00 g, urea 40.00 g, disodium ethylene diamine tetraacetate 0.30 g, 0.60 g Virahol, 0.20 g triethylamine and 1930.00 g deionized waters are joined in material-compound tank, after logical nitrogen deoxygenation 30 min, solution in 20.00 g 1% ammonium persulfate solutions and material-compound tank is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, react 50 min, finally obtain the gluey PAM of water white transparency through granulation, dry and pulverize after obtain white powder.The molecular weight 808.9 ten thousand of the powder polymkeric substance obtaining, dissolution time 120 min, the residual volume of monomer is 0.04%.
embodiment tri-
By 50% AM solution 1700.00 g, acrylyl oxy-ethyl-trimethyl salmiac (DAC, 80%) 1935.00 g, urea 120.00 g, disodium ethylene diamine tetraacetate 0.96 g, 0.50 g Virahol and 4238.00 g deionized waters join in material-compound tank, after logical nitrogen deoxygenation 30 min, 20 g 1% ammonium persulfate solutions are joined in material-compound tank, continue logical nitrogen 10 min, the sodium bisulfite of this solution and 10 g 1% is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, under normal temperature and microwave condition, react respectively certain hour 55 min, finally obtain the gluey PAM of water white transparency through granulation, after being dried and pulverizing, obtain white powder.The molecular weight of powder is 1345.0 ten thousand, dissolution time 120 min, monomer residual volume 0.02%.
embodiment tetra-
By 50% AM solution 1420.00 g, dimethyl diallyl ammonium chloride (DMDAAC, 60%) 300.00 g, urea 40.00 g, disodium ethylene diamine tetraacetate 0.20 g, 0.34g Virahol and 1750.00 g deionized waters join in material-compound tank, after logical nitrogen deoxygenation 30 min, the azo diisobutyl amidine hydrochloride solution of 50.00 g 1% ammonium persulfate solutions and 12.50 g 1% is joined in material-compound tank, continue logical nitrogen 10 min.The sodium sulfite solution of mixing solutions and 25.00 g 1% is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, react 48 min, finally obtain the gluey PAM of water white transparency through granulation, dry and pulverize after obtain white powder.The molecular weight of powder is 1008.5 ten thousand, and the residual volume of monomer is 0.04%.
embodiment five
By 50% AM solution 1000.00 g, propylene sodium solution 1260.00 g after neutralization, urea 55.00 g, disodium ethylene diamine tetraacetate 0.50 g and 1000.00 g deionized waters join in material-compound tank, after logical nitrogen deoxygenation 30 min, the azo diisobutyl amidine hydrochloride solution of 25.00 g 1% ammonium persulfate solutions and 12.50 g 1% is joined in material-compound tank, continue logical nitrogen 10 min, the sodium sulfite solution of this mixed solution and 15.00 g 1% is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, react 45 min, finally obtain colloid through granulation, after being dried and pulverizing, obtain white powder.The molecular weight of powder is 1,107 ten thousand, dissolution time 115 min, and the residual volume of monomer is 0.03%.
embodiment six
By 50% AM solution 1700.00 g, acrylyl oxy-ethyl-trimethyl salmiac (DAC, 80%) 1935.00 g, urea 120.00 g, disodium ethylene diamine tetraacetate 0.96 g, 0.50 g Virahol and 4238.00 g deionized waters join in material-compound tank, after logical nitrogen deoxygenation 30 min, 120 g 1% V50 are joined in material-compound tank, continue logical nitrogen 10 min, this solution is expected on the continuous device that is full of nitrogen rotating with certain speed with certain flow velocity cloth, react after 55 min, finally obtain the gluey PAM of water white transparency through granulation, after being dried and pulverizing, obtain white powder.The molecular weight of powder is 1371.5 ten thousand, dissolution time 120 min, and the residual volume of monomer is 0.02%.
Claims (9)
1. quick serialization legal system, for a method for high molecular weight polyacrylamide, is characterized in that:
(1) acrylamide (AM) aqueous solution or AM, the comonomer aqueous solution, solubility promoter, chain-transfer agents etc. add in material-compound tank than respectively by certain mass, wherein monomer mass concentration is 15 ~ 50%, regulate material-compound tank to certain temperature, inflated with nitrogen to solution deoxygenation certain hour after, then the solution in dosing vessel and initiator solution join with nitrogen on the travelling belt with certain speed operation except peroxide with certain speed continuously, successive polymerization 15-90 min at 0-85 ℃ of temperature, form polyacrylamide or polyacrylamide copolymer colloid, the thickness of colloid is 2 ~ 20 mm,
(2) polyacrylamide or polyacrylamide copolymer colloid are scraped by scraper, from discharge port, directly enter tablets press, and causing diameter is the colloid of 2-5 mm;
(3) drying temperature 40-100 ℃ is dried 4-16 h in drying plant, obtains the small-particle of solid-state polyacrylamide or polyacrylamide copolymer;
(4) pulverize the small-particle of dried solid-state polyacrylamide or polyacrylamide copolymer, obtain white diffluent polymer powder.
2. according to claim 1, step (1) monomer described and acrylamide copolymerization can be all monomers that dimethyl diallyl ammonium chloride (DMDAAC), methyl-propyl acyl-oxygen ethyl-trimethyl salmiac (DMC), acrylyl oxy-ethyl-trimethyl salmiac (DAC), sodium acrylate, 2-acrylamide-2-methylpro panesulfonic acid (AMPS) etc. can carry out radical polymerization, add different monomers, can produce non-ionic polyacrylamide, cationic-type polyacrylamide, amphiprotic polyacrylamide, anion-polyacrylamide etc.
3. according to claim 1, the described initiator of step (1) can be single initiator, can be also the combination of broad variety initiator; Can be formed by oxygenant, reductive agent and water-soluble azo class initiator, also can be that oxidation-reduction system or water-soluble azo class initiator are used separately, wherein oxygenant is persulphate, as Potassium Persulphate, ammonium persulphate or Sodium Persulfate, be preferably ammonium persulphate, add-on is 0.001 ~ 1% of acrylamide or polyacrylamide comonomer quality; Reductive agent is sulphite, as S-WAT, ammonium sulphite, potassium sulfite, sodium bisulfite, Potassium hydrogen sulfite, Sodium Metabisulfite, potassium metabisulfite etc., preferred sodium bisulfite, add-on is 0.0005 ~ 1% of monomer mass, reductive agent can be also organic amine, as: quadrol, diethylamine, triethylamine, pyridine etc., preferred triethylamine, its add-on is 0.01 ~ 1.0%; Water-soluble azo class initiator can be two (two the narrow base propane) dihydrochlorides (V-44), 4 of azo diisobutyl amidine hydrochloride (V-50), azo, 4'-azo two (4-cyanopentanoic acid) (V-501), azo two isopropylformic acid two formicesters (V-601) etc., add-on is monomer mass 0.001 ~ 1%.
4. according to claim 1, the described solubility promoter of step (1) is urea or thiocarbamide, and its consumption is 1 ~ 10% of acrylamide or polyacrylamide comonomer quality, preferably 4 ~ 8%.
5. according to claim 1, the described chain-transfer agent of step (1), can be Thiovanic acid, Sodium Benzoate, sodium formiate, mercaptan, Virahol, sorbyl alcohol, oxyacetic acid etc., these chain-transfer agents can be independent uses, also can mix use, its consumption is 0.005 ~ 1% of acrylamide or acrylamide comonomer quality.
6. according to claim 1, the described polyreaction of step (1) is to carry out under protection of inert gas, and rare gas element can be high pure nitrogen, argon gas, carbon dioxide etc., preferably high pure nitrogen.
7. according to claim 1; the polymerizing reactor that step (1) is described; by the dosing vessel " 1 " that control valve " 2 " are housed; control the distributor " 3 " of thickness of liquid film; insulation can " 4 "; roller bearing " 10 "; polytetrafluoro travelling belt " 8 " with raised brim " 9 " forms; by well heater " 7 "; the kick off temperature of controlling polymerization system, polymerization is carried out to a certain degree, and reaction mass enters the microwave reaction system " 6 " that two ends are furnished with microwave suppressor having " 5 "; last colloid is peeled off from travelling belt by scraper " 11 ", enters tablets press.
8. according to claim 1, the heating source of the described well heater 7 of step (1) can be water, water vapour, thermal oil or electrically heated, the temperature of reaction of popular response device is at 0 ~ 85 ℃, reaction times 15 ~ 90 min, wherein microwave reaction system is by regulation and control microwave output power monitoring real time reaction temperature, the temperature of microwave reactor is at 40 ~ 90 ℃, reaction times 3 ~ 30 min.
9. according to claim 1, described in step (1), Raolical polymerizable also can adopt light-initiated, reaction times 3 ~ 30 min.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211842A (en) * | 2014-08-22 | 2014-12-17 | 中科院广州化学有限公司南雄材料生产基地 | Novel zwitterionic polyelectrolyte dispersing agent as well as method and application thereof |
| CN105199044A (en) * | 2015-11-11 | 2015-12-30 | 重庆城市管理职业学院 | Method for preparing cationic polyacrylamide employing microwave-induced template polymerization |
| CN106893052A (en) * | 2017-03-13 | 2017-06-27 | 东北大学秦皇岛分校 | A kind of preparation method of graphene oxide/polyacrylamide composite aquogel |
| CN109053954A (en) * | 2018-05-31 | 2018-12-21 | 义乌市鹏之友新材料有限公司 | A kind of visible light Photoreactor and its application method being exclusively used in cationic polyacrylamide polymerization |
| CN109734838A (en) * | 2018-12-12 | 2019-05-10 | 江苏富淼科技股份有限公司 | A kind of high concentration anionic polyacrylamide and its synthetic method |
| CN110492101A (en) * | 2019-08-01 | 2019-11-22 | 深圳市比克动力电池有限公司 | A kind of negative electrode of lithium ion battery binder and its preparation method and application |
| CN110563866A (en) * | 2019-09-20 | 2019-12-13 | 江苏富淼科技股份有限公司 | Method for producing low-residual-monomer acrylamide polymer |
| CN111393564A (en) * | 2020-03-19 | 2020-07-10 | 爱森（中国）絮凝剂有限公司 | Preparation method of food-grade polyacrylamide |
| CN111607070A (en) * | 2019-02-25 | 2020-09-01 | 上海泰初化工技术有限公司 | Polymerization method of alpha-hydroxy acid |
| CN111635477A (en) * | 2020-06-16 | 2020-09-08 | 常州市丰源纺织助剂有限公司 | Preparation method of solid pure propylene and preparation equipment of solid pure propylene |
| CN116284560A (en) * | 2021-12-20 | 2023-06-23 | 深圳市长隆科技有限公司 | Cationic polyacrylamide for water treatment and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111526A (en) * | 2005-01-28 | 2008-01-23 | 施托克豪森有限责任公司 | Water-soluble or water-swellable polymers, particularly water-soluble or water-swellable copolymers made of acrylamide and at least one ionic comonomer having a low residual monomer concentration |
| CN101353392A (en) * | 2007-07-27 | 2009-01-28 | 朱定洋 | Preparation of high molecular weight instant cation polyacrylamide |
-
2013
- 2013-11-15 CN CN201310567836.5A patent/CN103554525A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111526A (en) * | 2005-01-28 | 2008-01-23 | 施托克豪森有限责任公司 | Water-soluble or water-swellable polymers, particularly water-soluble or water-swellable copolymers made of acrylamide and at least one ionic comonomer having a low residual monomer concentration |
| CN101353392A (en) * | 2007-07-27 | 2009-01-28 | 朱定洋 | Preparation of high molecular weight instant cation polyacrylamide |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211842A (en) * | 2014-08-22 | 2014-12-17 | 中科院广州化学有限公司南雄材料生产基地 | Novel zwitterionic polyelectrolyte dispersing agent as well as method and application thereof |
| CN104211842B (en) * | 2014-08-22 | 2016-08-24 | 中科院广州化学有限公司南雄材料生产基地 | A kind of new type amphoteric ionic polyelectrolyte dispersant and method thereof and application |
| CN105199044A (en) * | 2015-11-11 | 2015-12-30 | 重庆城市管理职业学院 | Method for preparing cationic polyacrylamide employing microwave-induced template polymerization |
| CN106893052A (en) * | 2017-03-13 | 2017-06-27 | 东北大学秦皇岛分校 | A kind of preparation method of graphene oxide/polyacrylamide composite aquogel |
| CN109053954A (en) * | 2018-05-31 | 2018-12-21 | 义乌市鹏之友新材料有限公司 | A kind of visible light Photoreactor and its application method being exclusively used in cationic polyacrylamide polymerization |
| CN109734838A (en) * | 2018-12-12 | 2019-05-10 | 江苏富淼科技股份有限公司 | A kind of high concentration anionic polyacrylamide and its synthetic method |
| CN109734838B (en) * | 2018-12-12 | 2021-08-10 | 江苏富淼科技股份有限公司 | High-concentration anionic polyacrylamide and synthesis method thereof |
| CN111607070A (en) * | 2019-02-25 | 2020-09-01 | 上海泰初化工技术有限公司 | Polymerization method of alpha-hydroxy acid |
| CN110492101A (en) * | 2019-08-01 | 2019-11-22 | 深圳市比克动力电池有限公司 | A kind of negative electrode of lithium ion battery binder and its preparation method and application |
| CN110563866A (en) * | 2019-09-20 | 2019-12-13 | 江苏富淼科技股份有限公司 | Method for producing low-residual-monomer acrylamide polymer |
| CN111393564A (en) * | 2020-03-19 | 2020-07-10 | 爱森（中国）絮凝剂有限公司 | Preparation method of food-grade polyacrylamide |
| CN111635477A (en) * | 2020-06-16 | 2020-09-08 | 常州市丰源纺织助剂有限公司 | Preparation method of solid pure propylene and preparation equipment of solid pure propylene |
| CN116284560A (en) * | 2021-12-20 | 2023-06-23 | 深圳市长隆科技有限公司 | Cationic polyacrylamide for water treatment and preparation method thereof |
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Application publication date: 20140205 |