Catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene to produce 1-chloro-2,2-difluoroethane

US9000242B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Norbert Lui · Odenthal, DE
• Shanthan Rao Pamulaparthy · Hyderabad, IN
• Srinivas Pvss · Hyderabad, IN
• Thomas Vijaya · Hyderabad, IN
• Sridhar Madabhushi · Hyderabad, IN
• Rambabu Yadla · Hyderabad, IN
• Narsaiah Banda · Hyderabad, IN
• Sergii Pazenok · Solingen, DE

Key dates

• Filing date: Oct 11, 2012
• Grant date: Apr 7, 2015
• Expiry date: Oct 11, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention is directed to a catalyst for the gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene with HF to give 1-chloro-2,2-difluoroethane which catalyst is prepared by co-depositing FeCl3 and MgCl2 on chromia-alumina, or co-depositing Cr(NO3)3 and Ni(NO3)2 on active carbon, or by doping alumina with ZnCl2, and to a process for the preparation of 1-chloro-2,2-difluoroethane comprising a catalytic gas phase fluorination of 1,1,2-trichloroethane and/or 1,2-dichloroethene wherein one of the catalysts according to claim 2 or 3 is used.