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Preparation of cationic polyacrylamide reverse microemulsion

A technology of polyacrylamide and inverse microemulsion, which is applied in the field of preparation of cationic polyacrylamide inverse microemulsion, which can solve the problems of easy fluctuation of polymerization temperature and long polymerization reaction time, and achieve easy control of polymerization temperature and particle size The effect of narrow distribution range and moderate molecular weight

Inactive Publication Date: 2008-11-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity of microemulsions, there are still a lot of problems to be solved in microemulsion polymerization, such as long polymerization reaction time, easy fluctuation of polymerization temperature, etc.

Method used

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  • Preparation of cationic polyacrylamide reverse microemulsion

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preparation example Construction

[0006] A preparation method of cationic polyacrylamide inverse microemulsion, the steps are as follows:

[0007] (1) Preparation of monomer solution

[0008] Mix acrylamide and dimethyl diallyl ammonium chloride in a molar ratio of 100:(40-5), add deionized water to form an aqueous solution with a mass concentration of 50%-65%;

[0009] (2) Preparation of oil phase

[0010] Mix and dissolve the non-ionic surfactant and kerosene in a weight ratio (27-43): 100 to form an oil phase; the non-ionic surfactant uses sorbitan oleate (Span80) and alkylphenol polyoxyethylene ether (OP-10), adjust the weight ratio of Span80 and OP-10 to make the lipophilic and hydrophilic balance value of the system 6.24-8.18;

[0011] (3) Inverse microemulsion polymerization

[0012] Add the oil phase prepared in step (2) into the reactor, place the reactor in a constant temperature water bath at 30-45°C, pass nitrogen and stir for 15-20 minutes; Place the reducing agent and sodium formate in a sepa...

Embodiment 1

[0026] Mix and dissolve acrylamide, dimethyl diallyl ammonium chloride, and deionized water to make a monomer aqueous solution; mix and dissolve surfactant and kerosene at a weight ratio of 33:100 to make an oil phase and add it to the reactor , wherein the surfactant is made by mixing Span80 and OP-10; the reactor is placed in a 35°C constant temperature water bath, nitrogen is passed and stirred for 15-20 minutes, and the monomer aqueous solution, potassium persulfate and sodium formate are placed in a separatory funnel In the process, add sodium thiosulfate directly into the oil phase, under the protection of nitrogen, slowly drop the aqueous monomer solution into the reactor, after 1 hour the dropwise addition is completed, continue to pass nitrogen and stir for 10-15 minutes, then stop nitrogen flow; continue After 2 hours of reaction, the polymerization reaction was completed, wherein the monomer aqueous solution concentration was 60%, the molar percentages of dimethyl di...

Embodiment 2

[0033] Mix and dissolve acrylamide, dimethyl diallyl ammonium chloride, and deionized water to make a monomer aqueous solution; mix and dissolve surfactant and kerosene at a weight ratio of 33:100 to make an oil phase and add it to the reactor , wherein the surfactant is made by mixing Span80 and OP-10; the reactor is placed in a 35°C constant temperature water bath, nitrogen is passed and stirred for 15-20 minutes, and the monomer aqueous solution, potassium persulfate and sodium formate are placed in a separatory funnel In the process, add sodium thiosulfate directly into the oil phase, under the protection of nitrogen, slowly drop the aqueous monomer solution into the reactor, after 1 hour the dropwise addition is completed, continue to pass nitrogen and stir for 10-15 minutes, then stop nitrogen flow; continue After 2 hours of reaction, the polymerization reaction was complete. Wherein, the monomer aqueous solution concentration is 60%, the mole percent of dimethyl diallyl...

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Abstract

The invention relates to a preparation method for cationic-type polyacrylamide reverse micro emulsion. The appearance of the micro emulsion is transparent or translucent low-viscosity micro latex and the mean particle diameter is 50 to 80 nm. The micro emulsion can be placed for a long time without delaminating. After routine extraction with alcohol and acetone, the micro emulsion becomes white powdered solids with the intrinsic viscosity of 200-600 ml / g. The preparation method is to take acrylamide and diallyl dimethyl ammonium chloride as comonomer, apply compounded emulsifying agent and redox initiation system, add sodium formate as reagent and additive in polymerization, and then apply the method of stepwise polymerization to the reverse micro emulsion polymerization. The cationic-type polyacrylamide of the invention has the advantages of moderate molecular weight, stable emulsion, rapid dissolution and narrow particle size distribution, thus being able to be widely applied to fields such as oil exploitation, paper making, textile dying, daily chemical industry and industrial water treatment.

Description

technical field [0001] The invention relates to a preparation method of cationic polyacrylamide inverse microemulsion, belonging to the technical field of water-soluble polymer synthesis. Background technique [0002] At present, acrylamide homopolymers and copolymers have become an important class of chemicals and are widely used in various fields such as textiles, printing and dyeing, coatings, construction, oil exploration and water treatment. The copolymer P(DMDAAC-AM) of acrylamide and dimethyl diallyl has high positive charge density, good water solubility, easy control of molecular weight, low cost, less dosage in water treatment, and good flocculation effect. , less sludge generation and other characteristics, has received widespread attention. Its preparation method has been reported at home and abroad, see Chinese patent CN1051366 (application number 90106284.7), Chinese patent CN101186672 (application number 200610097849), US 2923701, US 3920599, and US 4673511. ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F226/02C08F2/32
Inventor 岳钦艳司晓慧高宝玉王晓娜李春晓王元芳
Owner SHANDONG UNIV
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