Water-in-water type cationic polyacrylamide emulsion as well as preparation method and application thereof

A technology of polyacrylamide and acrylamide is applied in the field of polymer emulsion to achieve the effects of reduced energy consumption, good solubility and improved pulp retention rate

Active Publication Date: 2018-10-23
东营市诺尔化工有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a water-in-water cationic polyacrylamide emulsion with high effective content and high aqueous solution apparent viscosity and its preparation method and application, so as to solve at least one problem existing in the existing cationic polyacrylamide emulsion technical problem

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  • Water-in-water type cationic polyacrylamide emulsion as well as preparation method and application thereof
  • Water-in-water type cationic polyacrylamide emulsion as well as preparation method and application thereof
  • Water-in-water type cationic polyacrylamide emulsion as well as preparation method and application thereof

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preparation example Construction

[0026] The present invention provides, in a first aspect, a method for preparing a water-in-water cationic polyacrylamide emulsion, the method comprising the following steps:

[0027] (1) mixing acrylamide, cationic oligomer, salt compound and alcohol organic matter with water to obtain a mixed solution;

[0028] (2) The mixed liquid obtained in step (1) is passed through nitrogen and deoxygenated, and then heated at 2 to 9°C (for example, 2°C, 3°C, 4°C, 5°C, 6°C, 7°C, 8°C or 9°C) A reducing agent, an azo initiator and an oxidizing agent are sequentially added to the mixed solution to initiate a polymerization reaction to obtain a reaction product solution;

[0029](3) adding a salting-out agent to the reaction product solution obtained in step (2) to obtain a water-in-water cationic polyacrylamide emulsion;

[0030] The organic alcohols are selected from one or more of monohydric alcohols and dihydric alcohols.

[0031] In particular, the reaction product solution in the pr...

Embodiment 1

[0089] ①Use deionized water to fully stir and mix acrylamide, cationic oligomer, salt compound (potassium sulfate) and alcohol organic compound (ethylene glycol) homopolymerized from dimethyl diallyl ammonium chloride. , obtain a mixed solution with a mass percentage of total reactants of 40%, adjust the pH of the mixed solution to 4.3 with oxalic acid, and then use a refrigerator to reduce the temperature of the mixed solution to 6 °C; The mass percentage content of acrylamide monomers in the mixed solution is 8%, the mass percentage content of cationic oligomers in the mixed solution is 32%, and the mass percentage content of alcohol organics in the mixed solution is 6% %, and the mass percentage content of salt compounds in the mixed solution is 16%.

[0090] 2. When the temperature of the mixed solution obtained in ① drops to 6°C (initiation temperature), the mixed solution is moved into a glass reactor, a digital thermometer is inserted, high-purity nitrogen gas is introd...

Embodiment 2

[0094] ①Use deionized water to fully stir and mix acrylamide, cationic oligomer, salt compound (potassium sulfate) and alcohol organic compound (ethylene glycol) homopolymerized from dimethyl diallyl ammonium chloride. , obtain a mixed solution with a mass percentage of total reactants of 40%, adjust the pH of the mixed solution to 4.3 with oxalic acid, and then use a refrigerator to reduce the temperature of the mixed solution to 6 °C; The mass percentage of acrylamide monomers in the mixed solution is 8%, the mass percentage of cationic oligomers in the mixed solution is 32%, and the mass percentage of alcohol organics in the mixed solution is 7% %, and the mass percentage content of salt compounds in the mixed solution is 16%.

[0095] ② When the temperature of the mixed solution obtained in ① drops to 6°C, the mixed solution is moved into a glass reactor, a digital thermometer is inserted, high-purity nitrogen gas is introduced into it for 30 min, and then added to the mix...

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Abstract

The invention relates to a water-in-water type cationic polyacrylamide emulsion as well as a preparation method and application thereof. The method comprises the following steps that water is used foruniformly mixing acrylamide, cationic oligomers, salt compounds and alcohol organic matter to obtain a mixed solution; performing nitrogen introduction and oxygen removal on the mixed solution; then,sequentially adding reducing agents, azo initiators and oxidizing agents into the mixed solution at 2 to 9 DEG C for triggering the polymerization reaction; obtaining a reaction product solution; adding a salt separation agent into the reaction product solution; preparing the polyacrylamide emulsion, wherein the alcohol organic matter is selected from one or several kinds of materials from monohydric alcohol and dihydric alcohol; the effective content of the polyacrylamide emulsion is preferably 40 to 43 percent; the apparent viscosity of the 3-percent water solution is preferably 800 to 1000mpa*s. The cationic polyacrylamide emulsion with the high effective content and high water solution apparent viscosity can be prepared; the water-in-water type cationic polyacrylamide emulsion is used as a paper making retention aid; the paper pulp remaining rate can be higher; the water filtering effect is better; the consumption of the paper making retention aid is lower.

Description

technical field [0001] The invention belongs to the technical field of polymer emulsions, and in particular relates to a water-in-water cationic polyacrylamide emulsion and a preparation method and application thereof. Background technique [0002] Polyacrylamide (PAM) is an important water-soluble polymer with special physical and chemical properties. It is widely used in various fields such as chemical industry, coal, petroleum, papermaking and water treatment. title. [0003] Cationic polyacrylamide emulsion is mainly used as a retention aid in papermaking, using its own electric charge to enhance the adsorption force between fibers in pulp to enhance fiber retention. [0004] Cationic polyacrylamide, which is widely used as a retention aid in papermaking, has the following characteristics: [0005] In terms of appearance, the first type is dry powder polyacrylamide copolymerized with acrylamide and cationic functional monomer acryloyloxyethyltrimethylammonium chloride....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F271/00C08F220/56D21H17/45D21H21/10
CPCD21H17/455D21H21/10C08F271/00C08F220/56
Inventor 荣敏杰赵海港赵立国
Owner 东营市诺尔化工有限责任公司
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