Title:
VINYL AMIDE BLOCK COPOLYMER HYDRATE KINETIC INHIBITOR, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/128102
Kind Code:
A1
Abstract:
Disclosed are a vinyl amide block copolymer hydrate kinetic inhibitor and a preparation method therefor: employing the principle of reverse atom transfer radical polymerization, and under anaerobic operating conditions, using vinyl caprolactam and acrylamide as monomers, using dimethyl formamide as a solvent, using azobisisobutyronitrile as an initiator, and using a transition metal complex composed of anhydrous copper chloride and 2,2'-bipyridine as a catalytic system to achieve catalytic controlled free radical solution polymerization so as to form a poly(vinyl caprolactam-acrylamide) block copolymer hydrate kinetic inhibitor. The synthesized hydrate kinetic inhibitor has controllable molecular weight, narrow molecular weight distribution, a controllable synthesis process, a small injection amount, good solubility, may withstand a lower subcooling degree, and may lead to longer hydrate formation induction time and lower usage amount, while also having a better inhibitory effect than a conventional random copolymer such as poly(vinyl caprolactam-vinyl pyrrolidone).
Inventors:
LONG ZHEN (CN)
DING QIHANG (CN)
LIANG DEQING (CN)
DING QIHANG (CN)
LIANG DEQING (CN)
Application Number:
PCT/CN2018/089351
Publication Date:
July 04, 2019
Filing Date:
May 31, 2018
Export Citation:
Assignee:
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
International Classes:
C08F293/00; C08F4/54; C08F220/56; C09K8/52; C09K8/524
Domestic Patent References:
| WO2017147426A1 | 2017-08-31 |
Foreign References:
| CN108070063A | 2018-05-25 | |||
| US20100040572A1 | 2010-02-18 | |||
| US20080312478A1 | 2008-12-18 | |||
| CN102492407A | 2012-06-13 | |||
| CN104449600A | 2015-03-25 | |||
| CN106380541A | 2017-02-08 |
Other References:
ZHAO, KUN ET AL.: "Synthesis and Performance of New Hydrate Kinetic Inhibitors", NATURAL GAS CHEMICAL INDUSTRY, vol. 38, no. 2, 20 April 2013 (2013-04-20), pages 51 - 55
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (CN)
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