A temperature-resistant and salt-resistant multi-component copolymer and its preparation method and application

A multi-component copolymer and water-soluble polymer technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of terminal halogen loss, decreased control effect, and less research
CN109796954BActive Publication Date: 2021-07-06CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2021-07-06

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Abstract

The invention discloses a preparation method of a temperature-resistant and salt-resistant soluble multi-component copolymer: (1) Mixing a temperature-resistant water-soluble polymer solution and a photoinitiator solution, adding a water-soluble monomer, mixing, passing an inert gas to remove oxygen , and then placed under ultraviolet light for 10 to 30 minutes, and the light intensity was set to 500 to 10000 μW / cm 2 ; That is, a temperature-resistant multifunctional macromolecular initiator; (2) Dissolving the temperature-resistant multifunctional macromolecular initiator in water, then adding monomers, passing an inert gas to remove oxygen; Living / controllable radical polymerization of water-soluble monomers to obtain temperature-resistant and salt-resistant multi-polymers. The temperature-resistant and salt-resistant multi-component copolymer of the present invention has an ultra-high molecular weight of 1.9×10 7 Above, and temperature-resistant, salt-resistant, it can be used to increase the viscosity of aqueous solution under high-temperature and high-salinity conditions, and can be used as an oil displacement agent for tertiary oil recovery under high-temperature and high-salinity geological conditions to enhance oil recovery.
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Description

technical field

[0001] The invention relates to a temperature-resistant and salt-resistant ultra-high molecular weight water-soluble multi-polymer, a preparation method and application thereof. Background technique

[0002] In the polymer synthesis industry, free radical polymerization is the most widely used, and has the advantages of wide application range of monomers, mild polymerization conditions, and simple operation. However, the traditional free radical polymerization also has many shortcomings and deficiencies due to the limitation of the reaction mechanism, such as poor control over the polymerization product, the molecular structure and molecular weight of the prepared polymerization product are often uncontrollable, and the molecular structure design of the polymerization product is relatively difficult.

[0003] In order to solve the defect of uncontrollable molecular structure and molecular weight of products by traditional free radical polymerization, research...

Claims

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