Method for preparing polyacrylamide

A technology of polyacrylamide and acrylamide, which is applied in the chemical industry, can solve the problems of high production cost, low production efficiency, and unguaranteed product quality, and achieve the effects of short polymerization time, high production efficiency and stable reaction

Active Publication Date: 2013-01-30
河南辰龙实业有限公司
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Problems solved by technology

[0002] Ultra-low molecular weight polyacrylamide has a large demand in drilling, textile and other industries, and the demand is increasing year by year. In China, ultra-low molecular weight polyacrylamide is a product in short supply, and most of it

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[0013] The technical solutions of the present invention will be further described in detail below through specific implementations.

[0014] A preparation method of polyacrylamide, which includes the following steps:

[0015] Step 1. Liquid preparation: Add 875 parts by weight of water to the liquid mixing kettle, then add 112.5 parts by weight of cationic monomer under stirring, then heat the liquid mixing kettle, and add 1000 parts by weight of propylene under stirring After the acrylamide is completely dissolved, the preparation solution is obtained. The temperature of the final preparation solution should not exceed 30°C; due to the large temperature drop during the dissolution of acrylamide, the temperature of the preparation solution drops significantly, and heating is required to accelerate the dissolution of acrylamide .

[0016] Step 2. Adjust the pH value: add calcium hydroxide powder to the preparation solution to adjust the pH value of the preparation solution and make t...

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Abstract

The invention provides a method for preparing polyacrylamide. The method comprises the following steps of: adding 875 weight parts of water into a preparation kettle; adding 112.5 weight parts of cationic monomer in a stirring state; heating the preparation kettle, and adding 1,000 weight parts of acrylamide in a stirring state to obtain a preparation liquid after the acrylamide is completely dissolved; regulating the pH value of the preparation liquid to be between 7 and 9; adding excessive initiating agent sequentially into the preparation liquid in a dilated reaction container in a stirring state, and standing to perform an implosion reaction to obtain a polymer expansion body, wherein the initiating agent is peroxide aqueous solution with concentration of between 1.5 and 2.5 percent and sulfite with concentration of between 1.5 and 2.5 percent; and granulating, baking and screening the polymer expansion body sequentially to obtain the polyacrylamide. The preparation method has the advantages of short polymerization time, smooth reaction, low production cost and reliable product quality.

Description

technical field [0001] The invention relates to a preparation method of ultra-low molecular weight polyacrylamide, which belongs to the field of chemical industry. Background technique [0002] Ultra-low molecular weight polyacrylamide has a large demand in drilling, textile and other industries, and the demand is increasing year by year. In China, ultra-low molecular weight polyacrylamide is a product in short supply, and most of it is imported from abroad. The main reason is that domestic The production formula, production technology and production method are immature and unscientific, resulting in low production efficiency, high production cost and unguaranteed product quality. [0003] In order to solve the above existing problems, people have been seeking an ideal technical solution. Contents of the invention [0004] The purpose of the present invention is to address the deficiencies of the prior art, thereby providing a method for preparing polyacrylamide with shor...

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Application Information

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IPC IPC(8): C08F220/56C08F4/40C08J3/12C08L33/26
Inventor 余荣和
Owner 河南辰龙实业有限公司
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