Method for preparing high molecular weight cation type polyacrylamide

A polyacrylamide and cationic technology, which is applied in the field of preparing high molecular weight cationic polyacrylamide, can solve the problems of low cationic degree, inability to meet difficult wastewater treatment, and low molecular weight, so as to improve conversion rate and reduce molecular crossover. Linkage probability, solubility improvement effect

Inactive Publication Date: 2005-08-03
大庆东昊投资有限公司
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Problems solved by technology

[0003] In order to solve the problem that the existing cationic polyacrylamide has low molecular weight, low cationic degree and cannot meet the difficult wastewater treatment, the present invention provi

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  • Method for preparing high molecular weight cation type polyacrylamide
  • Method for preparing high molecular weight cation type polyacrylamide

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Embodiment Construction

[0007] The present invention will be further described below:

[0008] This invention selects 5 factors that have a greater impact on the relative molecular weight of the polymer, as shown in Table 1, through the method of orthogonal experiment, find out the best test conditions, the experiment process is: acrylamide and acryloyloxyethyl Trimethylammonium chloride is mixed in a weight ratio of 8:2, added to the reactor, injected with deionized water and stirred to dissolve to a solution with a total monomer concentration of 20% to 30%; adjust the pH value of the system to 6 to 9 with ammonia water ; Add chain extender, reducing agent, disodium ethylenediaminetetraacetic acid, urea, Span-20 and azobisisobutyronitrile in sequence to the reaction kettle with an initiation temperature of 8°C to 14°C, stir and mix well; After 30 minutes of nitrogen deoxygenation, add an oxidizing agent, in which chain extender, reducing agent, disodium edetate, urea, Span-20, azobisisobutyronitrile...

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Abstract

The present invention relates to preparation process of high molecular weight cation type polyacrylamide. The preparation process includes: mixing acrylamide and acrylyl oxyethyl trimethyl ammonium chloride in weight ratio of 1/99-99 in reactor and dissolving with added deionized water to total monomer concentration of 18-30 %; regulating system pH with ammonia water to 6-9; adding successively chain extender, reductant, disodium editate, urea, Span-20 and AIBN into the reactor with initiating temperature of 8-14 deg.c via stirring; introducing N2 to eliminate O2 for 30 min, adding oxidant ammonium persulfate and introducing for other 10 min; sealing for adiabatic polymerization; taking out the colloid block after the reaction system temperature is lowered to room temperature; pelletizing, stoving, crushing and sieving to obtain the powdered cation type polyacrylamide product.

Description

Technical field: [0001] The invention relates to a method for preparing polyacrylamide, which belongs to the method for preparing high molecular weight cationic polyacrylamide. Background technique: [0002] With the development of society, the country has continuously strengthened the sewage treatment. Traditionally, some inorganic compounds are used for surface water source drinking water, industrial water, sewage and wastewater treatment, such as alum, polyaluminum chloride, polyferric sulfate, etc. These The dosage of treatment agent is large, and the sludge produced is large in volume and difficult to handle, and the effect of flocculation and purification is not satisfactory. At present, flocculants for organic polymers are much improved compared with inorganic compounds in the treatment, especially cationic polyacrylamide is widely used, but the preparation methods of existing cationic polyacrylamide flocculants are divided It is divided into two categories: one is t...

Claims

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Application Information

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IPC IPC(8): C08F4/04C08F20/56
Inventor 朱圣贤陈卫民齐永青张达生宋会美杨怀宇
Owner 大庆东昊投资有限公司
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