The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2018
Filed:
Feb. 05, 2015
Xi'an Modern Chemistry Research Institute, Xi'an, Shaanxi, CN;
Jian Lv, Shaanxi, CN;
Hui Ma, Shaanxi, CN;
Yujie Gu, Shaanxi, CN;
Bo Wang, Shaanxi, CN;
Yue Qin, Shaanxi, CN;
Zhenhua Zhang, Shaanxi, CN;
Zhijun Hao, Shaanxi, CN;
Chunying Li, Shaanxi, CN;
Fengxian Li, Shaanxi, CN;
Jing Lv, Shaanxi, CN;
Yanbo Bai, Shaanxi, CN;
Xi'an Modern Chemistry Research Institute, Xi'an, CN;
Abstract
Disclosed is a process for the preparation of 1,3,3,3-tetrafluoropropene, comprising: (a) a compound having the formula CFClCHClCHFCland in the presence of a compound catalyst, undergoes, through n serially-connected reactors, gas-phase fluorination with hydrogen fluoride, producing 1,2,3-trichloro-1,1,3-trifluoropropane, and 1,2-dichloro-1,1,3,3-tetrafluoropropane; in said formula, x=1, 2 or 3; y=1 or 2, and 3≦x+y≦5; (b) 1,2,3-trichloro-1,1,3-trifluoropropane, and 1,2-dichloro-1,1,3,3-tetrafluoropropane undergo, in the presence of a dehalogenation catalyst, gas-phase dehalogenation with hydrogen, producing 3-chloro-1,3,3-trifluoropropene, and 1,1,3,3-tetrafluoropropene; (c) 3-chloro-1,3,3-trifluoropropene and 1,1,3,3-tetrafluoropropene undergo, in the presence of a fluorination catalyst, gas-phase fluorination with hydrogen fluoride, producing 1,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 1,3,3,3-tetrafluoropropene.