METHOD FOR PREPARING TERPOLYMER AND USE THEREOF - TSINGHUA SHENZHEN INT GRADUATE SCHOOL

Title:

METHOD FOR PREPARING TERPOLYMER AND USE THEREOF

Document Type and Number:

WIPO Patent Application WO/2023/123550

Kind Code:

A1

Abstract:

A method for preparing a terpolymer, the method comprising: S1, weighing three monomers, i.e. vinyl caprolactam, vinyl pyrrolidone and vinyl acetate, and an initiator and a solvent in proportion, adding same into a container and starting nitrogen protection; S2, starting condensate water and magnetic stirring, and reacting the mixture in an oil bath at 60ºC-90ºC for 5-10 hours; S3, turning off the oil bath and the magnetic stirring, and after the reaction mixture is cooled to room temperature, evaporating same under reduced pressure to remove the solvent to obtain a precipitate; and S4, washing the precipitate with an organic solvent, filtering same under reduced pressure, and vacuum-drying same to obtain a terpolymer. Compared with the commercial inhibitor Inhibex 501, the terpolymer prepared by free radical polymerization of the three monomers, i.e. vinyl caprolactam, vinyl pyrrolidone and vinyl acetate, in a specific mass ratio can have an excellent inhibition effect on methane propane hydrate under the condition of having high resistance to supercooling; and the gas consumption thereof is much lower than PVP and PVCap after a continuous reaction for 12 hours, and has a significantly improved inhibition effect.

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Inventors:

CHEN DAOYI (CN)
ZOU XUE (CN)
WU TIANTIAN (CN)

Application Number:

PCT/CN2022/071185

Publication Date:

July 06, 2023

Filing Date:

January 11, 2022

Export Citation:

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Assignee:

TSINGHUA SHENZHEN INT GRADUATE SCHOOL (CN)

International Classes:

C08F226/06; A61K8/81; A61K47/32; A61Q5/06; C07C7/20; C07C9/04; C07C9/08; C08F218/08; C08F226/10

Domestic Patent References:

WO1993006816A1	1993-04-15
WO2021092802A1	2021-05-20
WO2015124557A1	2015-08-27

Foreign References:

JPS6436610A	1989-02-07
US4785065A	1988-11-15
CN109054790A	2018-12-21
US6867262B1	2005-03-15
CA1218310A	1987-02-24

Attorney, Agent or Firm:

CHINA TRUER IP (CN)

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