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High-viscosity cationic polyelectrolyte dry powder and preparation method thereof

A cationic polyelectrolyte technology, applied in the field of high viscosity cationic polyelectrolyte dry powder and its preparation, to achieve the effect of high viscosity

Active Publication Date: 2021-02-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This viscosity value can be used in many aspects such as sewage treatment, paper making, coal slime washing, etc., but there is still a certain gap in the acidification and thickening of drilling fluid, and it needs to be above 15dL / g to have obvious effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 384g of 78% DMC monomer and 116g of deionized water into the reactor and shake well, adjust the pH value to 3 with hydrochloric acid, then put the reactor into a constant temperature water bath at 50°C, fill the system with nitrogen for 20 minutes, and then add 0.3g of itaconic acid, 0.3gv-50, 0.06g of ammonium persulfate and 0.06g of sodium bisulfite, after about 1 minute, the polymerization starts, after 5 minutes, the nitrogen is stopped, and the reaction is completed in 4 hours, and the colloid is obtained. After granulation, drying, crushing and sieving, white PDMC dry powder particles were obtained, and the sample was subjected to a viscosity test (using GB12005.1-89), and the intrinsic viscosity of the obtained polymer was 15.22dL / g, the residual monomer was 0.44%, and the solid Content 90%.

Embodiment 2

[0022] Same as Example 1, the difference is that the pH value is adjusted to 4, the intrinsic viscosity of the obtained polymer is 15.53dL / g, the residual monomer is 0.42%, and the solid content is 90%.

Embodiment 3

[0024] Same as Example 1, the difference is that the polymerization reaction temperature of Example 3 is 55° C., the intrinsic viscosity of the obtained polymer is 15.82 dL / g, the residual monomer is 0.43%, and the solid content is 90%.

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PUM

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Abstract

The invention relates to a high-viscosity cationic polyelectrolyte dry powder and a preparation method thereof. Methacryloyloxyethyltrimethylammonium chloride (DMC) is used as a polymerization monomer, and four-way initiation is adopted. The initiators are itaconic acid, azo initiator, ammonium persulfate and sodium bisulfite. The polymerization concentration is 60±2%, and the polymerization process adopts aqueous solution polymerization. The present invention adopts the high-efficiency initiation of itaconic acid, synergistic redox and azo initiator, and through the selection of the initiation system, the polymerization process is stable in the early stage, middle stage and late stage, and the problem of fast initiation of single initiator and insufficient stamina of late initiation is improved. Shortcomings, so that the high-viscosity cationic polyelectrolyte PDMC dry powder with intrinsic viscosity above 15dL / g and monomer residue <0.5% can be obtained; it can be used as an acidifying thickener for oil recovery in oil fields, and can also be used for sewage treatment, papermaking, coal washing, industries such as mining; the present invention also provides its preparation method.

Description

technical field [0001] The invention relates to a high-viscosity cationic polyelectrolyte dry powder and a preparation method thereof. Background technique [0002] At present, there are many types of cationic polyelectrolytes on the market, most of which are copolymers, mostly cationic polyacrylamide, and are widely used, especially in oil field oil recovery, sewage treatment and papermaking industries. It is seldom produced and used, and the more mature technology is polydimethyldiallyl ammonium chloride (PDMDAAC). Jia Xu and Zhang Yuejun have made a detailed introduction in the literature "Research Progress in the Synthesis of PDMDAAC". Its highest viscosity is 7.7dL / g, and the research and report of the homopolymer PDMC of the quaternary ammonium salt monomer methacryloyloxyethyltrimethylammonium chloride (DMC) is still in its infancy. There are two main reasons: on the one hand, the high price of PDMC limits its use and R&D and manufacturing; on the other hand, the vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/34C08F2/10C08F4/04C08F4/40
CPCC08F2/10C08F4/04C08F4/40C08F120/34
Inventor 郭卫东张勇李留忠梁斌
Owner CHINA PETROLEUM & CHEM CORP
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