Title:
PREPARATION METHOD FOR HEXAFLUOROBUTADIENE
Document Type and Number:
WIPO Patent Application WO/2024/016438
Kind Code:
A1
Abstract:
The present invention relates to a preparation method for hexafluorobutadiene. The method comprises: 1) performing temperature raising and pressure increase reactions on chlorotrifluoroethylene, and then performing a thermal polymerization reaction on same to obtain a precursor; 2) performing fractional distillation on the precursor and obtaining a low-boiling-point intermediate, and recovering a residual solution; 3) adding the intermediate into ethanol, performing a reflux reaction under a zinc catalyst to collect a gas product, and then mixing the collected gas product with hydrogen iodide, performing high-temperature ring opening, and performing condensation recovery to obtain a condensate solution; and 4) mixing the condensate solution with the residual solution in step 2), reacting with chlorine water under photocatalysis, adding the mixture into diethylene glycol monobutyl ether, performing a heating reaction under a zinc catalyst, performing condensation reflux to remove impurities, and enabling the gas product to pass through a high-temperature porous solid catalyst to obtain hexafluorobutadiene. The preparation process can increase the yield of hexafluorobutadiene to at least 85%, and greatly improves the preparation effect.
Inventors:
ZHOU WENPING (CN)
ZHANG QIANZHEN (CN)
FU XIAOTENG (CN)
ZHANG KUI (CN)
ZHANG HONGQUAN (CN)
ZHANG QIANZHEN (CN)
FU XIAOTENG (CN)
ZHANG KUI (CN)
ZHANG HONGQUAN (CN)
Application Number:
PCT/CN2022/116782
Publication Date:
January 25, 2024
Filing Date:
September 02, 2022
Export Citation:
Assignee:
FUJIAN HANGFU ELECTRONIC MAT CO LTD (CN)
International Classes:
C07C21/20; B01J27/12; C07C17/04; C07C17/23; C07C17/281; C07C17/354; C07C17/357; C07C17/383; C07C19/08; C07C19/10; C07C23/06
Foreign References:
| RU2264376C1 | 2005-11-20 | |||
| US2844636A | 1958-07-22 | |||
| CN114539021A | 2022-05-27 | |||
| US2668182A | 1954-02-02 | |||
| JP2003261477A | 2003-09-16 |
Other References:
WEI MAO, LÜ JIAN, ZHANG WEI, DU YONGMEI, WANG WEI: "Progress in preparation of hexafluorobutadiene", CHEMICAL INDUSTRY AND ENGINEERING PROGRESS, CHI, vol. 30, no. 3, 5 March 2011 (2011-03-05), pages 627 - 633, 648, XP093131652, DOI: 10.16085/j.issn.1000-6613.2011.03.022
LI LI, WANG FEI; TANG NIAN; ZHOU YONGYAN: "Synthesis Methods of Hexafluorobutadiene-Fluorine Industry", ORGANO-FLUORINE INDUSTRY, vol. 1, 15 September 2019 (2019-09-15), pages 51 - 53, XP093131653
WEI CAO: "Discussion on the Synthesis Processes of Hexafluorobutadiene", ORGANO-FLUORINE INDUSTRY, vol. 4, 15 December 2018 (2018-12-15), pages 33 - 36, XP093131656
LI LI, WANG FEI; TANG NIAN; ZHOU YONGYAN: "Synthesis Methods of Hexafluorobutadiene-Fluorine Industry", ORGANO-FLUORINE INDUSTRY, vol. 1, 15 September 2019 (2019-09-15), pages 51 - 53, XP093131653
WEI CAO: "Discussion on the Synthesis Processes of Hexafluorobutadiene", ORGANO-FLUORINE INDUSTRY, vol. 4, 15 December 2018 (2018-12-15), pages 33 - 36, XP093131656
Attorney, Agent or Firm:
BEIJING HENGTAI MINGRUI INTELLECTUAL PROPERTY ACT FOR LIMITED COMPANY (CN)
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