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:
Dec. 31, 2013
Filed:
Nov. 03, 2009
Haluk Kopkalli, Staten Island, NY (US);
Yuon Chiu, Denville, NJ (US);
Stephen A. Cottrell, Baton Rouge, LA (US);
Hsueh Sung Tung, Getzville, NY (US);
Kevin Uhrich, Alden, NY (US);
Haluk Kopkalli, Staten Island, NY (US);
Yuon Chiu, Denville, NJ (US);
Stephen A. Cottrell, Baton Rouge, LA (US);
Hsueh Sung Tung, Getzville, NY (US);
Kevin Uhrich, Alden, NY (US);
Honeywell International Inc., Morriston, NJ (US);
Abstract
Disclosed is a process for the manufacture of HFO-1234yf from TCP in three integrated steps that include hydrofluorination of TCP (tetrachloropropene) to HCFC-1233xf in the vapor phase followed by hydrofluorination of HCFC-1233xf to HCFC-244bb in the liquid phase which is then followed by dehydrochlorination in liquid or vapor phase to produce HFO-1234yf. The vapor phase hydrofluorination is carried out at a higher pressure than the liquid phase hydrofluorination, thereby eliminating the need for compression and/or intermediate recovery. Also, any HCl generated from this reaction is fed to the liquid phase hydrofluorination section to promote agitation and mixing. This results in a more economical process from an initial capital and operating cost versus conducting the 3-steps sequentially.