Method for producing cis-1,3,3,3-tetrafluoropropene

Patent metadata

Field	Value
Publication number	US-9365472-B2
Application number	US-201414583349-A
Country	US
Kind code	B2
Filing date	Dec 26, 2014
Priority date	Jun 29, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A method for producing 1234Z from 1234E while generation of 245fa as a byproduct is suppressed. The method for producing cis-1,3,3,3-tetrafluoropropene includes putting trans-1,3,3,3-tetrafluoropropene into contact with a catalyst. The trans-1,3,3,3-tetrafluoropropene is put into contact with the catalyst at a reaction temperature of higher than or equal to 200° C. and lower than or equal to 550° C. for a contact time of longer than or equal to 0.01 seconds and shorter than or equal to 500 seconds.

First claim

The invention claimed is:

1. A method for producing cis-1,3,3,3-tetrafluoropropene comprising;
contacting trans-1,3,3,3-tetrafluoropropene with a catalyst at a reaction temperature of higher than or equal to 200° C. and lower than or equal to 550° C. for a contact time of longer than or equal to 0.01 seconds and shorter than or equal to 500 seconds,
wherein the reaction temperature and the contact time have negative correlation and wherein the product obtained by contacting trans-1,3,3,3-tetrafluoropropene with the catalyst is substantially free of 1,1,1,3,3-pentafluoropropane.

2. The method according to claim 1 , wherein the reaction temperature is higher than or equal to 250° C. and lower than or equal to 500° C. and the contact time is longer than or equal to 1 second and shorter than or equal to 150 seconds.

3. The method according to claim 1 , wherein contacting the trans-1,3,3,3-tetrafluoropropene with the catalyst comprises contacting the trans-1,3,3,3-tetrafluoropropene with a gas phase.

4. The method according to claim 1 , wherein the catalyst is a metal compound comprising at least one metal material selected from the group consisting of aluminum, chromium, titanium, manganese, iron, nickel, cobalt, copper, magnesium, zirconium, molybdenum, zinc, tin, lanthanum and antimony.

5. The method according to claim 4 , wherein the metal compound is a metal fluoride.

6. A method for producing highly pure cis-1,3,3,3-tetrafluoropropene, comprising;
distilling cis-1,3,3,3-tetrafluoropropene obtained by a method according to claim 1 .

7. A method for producing cis-1,3,3,3-tetrafluoropropene including;
putting trans-1,3,3,3-tetrafluoropropene into contact with a catalyst at a reaction temperature of higher than or equal to 200° C. and lower than or equal to 550° C. for a contact time of longer than or equal to 0.01 seconds and shorter than or equal to 500 seconds,
wherein the catalyst is a supported catalyst in which a metal compound comprising at least one metal material selected from the group consisting of aluminum, chromium, titanium, manganese, iron, nickel, cobalt, copper, magnesium, zirconium, molybdenum, zinc, tin, lanthanum and antimony is supported on carbon, and
the reaction temperature and the contact time have negative correlation and wherein the product obtained by contacting trans-1,3,3,3-tetrafluoropropene with the catalyst is substantially free of 1,1,1,3,3-pentafluoropropane.

8. The method according to claim 1 , wherein the catalyst is the metal compound comprising at least one metal material selected from a group consisting of aluminum, titanium, manganese, iron, nickel, cobalt, copper, magnesium, zirconium, molybdenum, zinc, tin, lanthanum and antimony.

9. The method according to claim 1 , wherein a product obtained by contacting trans-1,3,3,3-tetrafluoropropene with the catalyst is substantially free of other materials except for cis-1,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene.

10. The method according to claim 7 , wherein the catalyst is the supported catalyst in which the metal compound comprising at least one metal material selected from the group consisting of aluminum, titanium, manganese, iron, nickel, cobalt, copper, magnesium, zirconium, molybdenum, zinc, tin, lanthanum and antimony is supported on carbon.

11. The method according to claim 7 , wherein a product obtained by putting trans-1,3,3,3-tetrafluoropropene into contact with the catalyst is substantially free of other materials except for cis-1,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene.

Assignees

• Central Glass Co Ltd
• Central Glass Co Ltd

Inventors

• Okamoto Satoru
• Takada Naoto
• Sakyu Fuyuhiko
• Kitamoto Takamasa
• Tonomura Takuya
• Kanai Masatomi

Classifications

• C09K3/30

  for aerosols (aerosol containers B65D83/14) · CPC title

• B01J27/132

  with chromium, molybdenum, tungsten or polonium · CPC title

• B01J27/125

  with scandium, yttrium, aluminium, gallium, indium or thallium · CPC title

• B01J27/12

  Fluorides · CPC title

• C09K5/045

  containing only fluorine as halogen · CPC title