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Structure-oriented composite initiator system and acrylamide polymer and preparation method and application thereof

A composite initiator, structure-oriented technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of difficulty in obtaining acrylamide polymers, cumbersome process operations, etc., and achieve low residual monomer content, water-soluble Good performance, high molecular weight

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical shear resistance of the polymer obtained by the above two methods is enhanced, but the process operation is relatively cumbersome, and it is difficult to obtain an acrylamide polymer with a higher molecular weight by using the above two methods for the polymerization of acrylamide. Yes, the polymerization of acrylamide with the existing initiator system cannot obtain high shear resistance and high aging resistance as well as high apparent viscosity at high temperature and high salinity water Acrylamide polymer

Method used

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  • Structure-oriented composite initiator system and acrylamide polymer and preparation method and application thereof
  • Structure-oriented composite initiator system and acrylamide polymer and preparation method and application thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing an acrylamide polymer, which includes polymerizing acrylamide and a temperature-resistant and salt-resistant monomer in water in the presence of an initiator and an inorganic basic substance, wherein the initiator Contains the structure-oriented composite initiator system provided by the invention.

[0034] The acrylamide polymer in the present invention refers to a polymer obtained by reacting acrylamide with a temperature-resistant and salt-resistant monomer under copolymerization conditions, including a structural unit formed by acrylamide and a temperature-resistant and salt-resistant monomer. structural unit.

[0035] According to the preparation method of the acrylamide polymer of the present invention, in the presence of an initiator and an inorganic basic substance, the method of polymerizing acrylamide and a temperature-resistant and salt-resistant monomer in water can be a conventional method in the ar...

Embodiment 1

[0076] This example is used to illustrate the structure-oriented composite initiator and acrylamide polymer according to the present invention and the preparation method thereof.

[0077] Add 200 kilograms of deionized water to the batching kettle, add 100 kilograms of acrylamide, 0.2 kilograms of 2-acrylamido-2-methylpropanesulfonic acid, and add sodium hydroxide solution with a concentration of 20% by weight under stirring to adjust The pH value of the obtained solution reaches 5, and the temperature of the solution is controlled at 5°C with frozen brine, and the monomer solution is pumped into the polymerization kettle, and the high-purity nitrogen is used for deoxygenation for 0.5 hours. -Amine dendrimers, 5 grams of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride, add 2.5 grams of sodium bisulfite and 5 grams of ammonium persulfate, continue to pass Nitrogen was used until the thermocouple in the polymerization kettle began to heat up, and the re...

Embodiment 2

[0079] This example is used to illustrate the structure-oriented composite initiator and acrylamide polymer according to the present invention and the preparation method thereof.

[0080]Add 2000 kilograms of deionized water in the batching kettle, under stirring state, add 100 kilograms of acrylamide, 200 kilograms of 2-acrylamido-2-methylpropanesulfonic acid, add the sodium hydroxide solution that concentration is 20% by weight, adjust The pH value of the obtained solution is 9, and the temperature of the solution is controlled by refrigerated brine to 15°C. The monomer solution is pumped into the polymerization kettle, and the high-purity nitrogen gas is used to remove oxygen for 0.5 hours, and 40 grams of ethylenediamine is added as the core (third generation) polyamide -Amine dendrimers, 50 grams of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride, add 40 grams of sodium bisulfite and 50 grams of ammonium persulfate, continue to pass Nitrogen unti...

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Abstract

The present invention discloses a structure-oriented composite initiator system and an acrylamide polymer and a preparation method and application thereof. The structure-oriented composite initiator system contains a redox system initiator, the redox system initiator comprises oxidizing and reducing agents, wherein the structure-oriented composite initiator system further comprises a polyamide-amine dendritic macromolecule. The acrylamide polymer has a higher molecular weight, higher shear resistance, better anti-aging properties, and good water-soluble and other advantages, and the acrylamide polymer has high apparent viscosity in high temperature and high salinity water, and can be used as a high temperature and high salinity oil reservoir tertiary oil recovery oil displacement agent.

Description

technical field [0001] The invention relates to a structure-oriented composite initiator system and an acrylamide polymer and a preparation method and application thereof. More specifically, the present invention relates to a structure-oriented composite initiator system, a method for preparing an acrylamide polymer using the structure-oriented composite initiator system, an acrylamide polymer prepared by the method, and said acrylamide polymerization application of things. Background technique [0002] Partially hydrolyzed polyacrylamide with high molecular weight can realize the entanglement of molecular chains at a low concentration, and the viscosity increasing effect is remarkable. Therefore, it is a kind of oil displacement polymer widely used in tertiary oil recovery in oil fields. However, the use effect of such polymer aqueous solutions as oil displacement agents is greatly affected by the reservoir resource environment. For low-temperature and low-salt type I and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/40C08F283/00C08F220/56C08F220/58C08F226/10C08F8/12C09K8/588
Inventor 伊卓杜超刘希方昭张文龙林蔚然祝纶宇
Owner CHINA PETROLEUM & CHEM CORP
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