Method of obtaining a combination of Z and E stereoisomers of 1-chloro-3,3,3-trifluoropropene

Patent metadata

Field	Value
Publication number	US-9890097-B2
Application number	US-201514870160-A
Country	US
Kind code	B2
Filing date	Sep 30, 2015
Priority date	Sep 13, 2007
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Disclosed are the combinations containing Z and E stereoisomers of hydrofluoroolefins where the more toxic isomer is less than about 30% weight of the combination (vs the sum of Z+E), to minimize the toxicity impact in the applications they will be used for such as cooling and heat fluids, foams blowing agents or solvents. Also disclosed are means to obtain combinations containing Z and E stereoisomers of hydrofluoroolefins.

First claim

What is claimed is:

1. A method of preparing a combination of Z and E isomers of 1-chloro-3,3,3-trifluoropropene (R1233zd) comprising less than about 30% by weight of the Z isomer from a combination having more than about 30% by weight of the Z isomer comprising distillation of a combination of Z and E isomers of R1233zd having more than about 30% by weight of the Z isomer, wherein no solvent is added to the distillation process.

Assignees

• Arkema Inc

Inventors

• Bonnet Philippe
• Elsheikh Maher Y

Classifications

• C07C21/18

  containing fluorine · CPC title

• Y02P20/127

  Cross-Sectional Technologies · mapped topic

• C08J9/146

  only fluorine as halogen atoms · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K3/30

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