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Manufacturing method of papermaking sewage type cationic polyacrylamide

A technology of polyacrylamide and paper-making sewage, which is applied in the field of paper-making sewage-type cationic polyacrylamide, can solve the problems of unreachable, backward technology, high price, etc., and achieve high stability, good adsorption and high purity.

Inactive Publication Date: 2013-02-27
QINGDAO NATHAN FLOCCULANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country’s cationic polyacrylamide for papermaking sewage treatment is both imported and domestically produced, and there are two types of products in the form of solid particles and emulsions (the emulsion type is rarely used due to the inconvenience of transportation); although the performance of imported products is relatively stable, but The price is high, and there is a lot of resistance in the promotion of all applications; the price of domestic products is relatively suitable, but due to the backward technology and insufficient technical support, it leads to confusion in the product market and application
Domestic cationic polyacrylamide mainly uses acrylamide and cationic monomers as raw materials, and is synthesized by light-induced photoinitiator-catalyzed reaction gel, and then processed by granulation→drying→crushing→packaging to obtain solid particle cationic polyacrylamide. Acrylamide, but the ionicity and molecular weight distribution of this kind of products are too wide, the product structure is unstable, and it cannot achieve better results in application, so it cannot get better economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Initiating system A is firstly added to the mixture of acrylamide and cationic monomer, and then adding initiating system B, using vertical reactor equipment at normal temperature and pressure, reacting for 0.5 hours to 2 hours to form a transparent gel, and then through Aging at 80-95°C for 0.5 hours to 2 hours, after the process of granulation→salting out→drying→crushing→screening→packaging, the ionicity is between 20%-30%, and the molecular weight is 8-12 million. Cationic polyacrylamide products with an apparent viscosity greater than 40cP; adding the initiator system A to the mixed solution is an azo chemical, V40, V44 and V50, the amount added is 0.001 times the weight of the mixed solution, and the initiator system is added to the mixed solution B is an oxidizing agent and a reducing agent. The oxidizing agent is potassium persulfate and sodium persulfate, and the reducing agent is sodium sulfite and sodium bisulfite. The addition of these two reagents is 0.000008...

Embodiment 2

[0015] Initiating system A is firstly added to the mixture of acrylamide and cationic monomer, and then adding initiating system B, using vertical reactor equipment at normal temperature and pressure, reacting for 0.5 hours to 2 hours to form a transparent gel, and then through Aging at 80-95°C for 0.5 hours to 2 hours, after the process of granulation→salting out→drying→crushing→screening→packaging, the ionicity is between 20% and 30%, the molecular weight is 8-12 million, and the apparent Cationic polyacrylamide products with a viscosity greater than 40cP; adding initiator system A to the mixed solution is an azo chemical, V59 and V60, and the amount added is 0.002 times the weight of the mixed solution; adding initiator system B to the mixed solution is an oxidizing agent and reducing agent, the oxidizing agent is potassium persulfate, sodium persulfate and ammonium persulfate, the reducing agent is sodium pyrosulfate and ferrous ammonium sulfate, and the addition of these t...

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Abstract

The invention provides a manufacturing method of papermaking sewage type cationic polyacrylamide, which is characterized in that triggering systems A and B are added in acrylamide and cationic monomer mixed liquor respectively to react in a vertical reaction kettle and generate gel and cationic polyacrylamide product whose ionic degree is 20-30 percent, molecular weight is 8000-12000 thousands, and apparent viscosity is more than 40 cP. The positive effects of the manufacturing method are as follows: on the basis of previous research, the method is creatively adopted to obtain the cationic polyacrylamide product whose ionic degree is 20-30 percent; molecular weight is 8000-12000 thousands; and apparent viscosity is more than 40 cP; and the cationic polyacrylamide has the characters of good adsorbability, high purity, good stability, and is safe and healthy.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment agents, and in particular relates to a method for manufacturing paper-making sewage-type cationic polyacrylamide. Background technique [0002] Papermaking sewage cationic polyacrylamide is mainly used for the removal of sludge in the process of papermaking sewage treatment. At present, my country’s cationic polyacrylamide for papermaking sewage treatment is both imported and domestically produced, and there are two types of products in the form of solid particles and emulsions (the emulsion type is rarely used due to the inconvenience of transportation); although the performance of imported products is relatively stable, but The price is high, and there is a lot of resistance in the promotion of all applications; the price of domestic products is relatively suitable, but due to the backward technology and insufficient technical support, it leads to confusion in the product market and appl...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F4/40C08F4/04
Inventor 蔺宝森蔺文才
Owner QINGDAO NATHAN FLOCCULANT
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