METHOD FOR PRODUCING FLUORINATED ORGANIC COMPOUNDS

WIPO Patent Application WO2007079431

A8

Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF₃CF=CH₂ (1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCI₂=CCICH₂CI (which may be purchased or synthesized from 1,2,3- trichloropropane) is fluorinated (preferably with HF in gas-phase in the presence of a catalyst) to synthesize a compound such as CFaCCl=CH2, preferably in a 80-96% selectivity. The CF₃CCl=CH₂ is preferably converted to CF₃CFClCH₃ (244-isomer) using a SbCl₅ as the catalyst which is then transformed selectively to 1234yf, preferably in a gas-phase catalytic reaction using activated carbon as the catalyst. For the first step, a mixture Of Cr2O3 and FeCl₃/C is preferably used as the catalyst to achieve high selectivity to CF₃CCl=CH₂ (96%). In the second step, SbCl₅/C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CF₃CFClCH₃. The intermediates are preferably isolated and purified by distillation and used in the next step without further purification, preferably to a purity level of greater than about 95%.

TUNG HSUEH SUNG (US)
MUKHOPADHYAY SUDIP (US)
VAN DER PUY MICHAEL (US)
MA JING JI (US)
BORTZ CHERYL (US)
LIGHT BARBARA (US)
PHILLIPS STEVEN D (US)
DUBEY RAJESH (US)
MERKEL DANIEL C (US)

PCT/US2007/000056

August 21, 2008

January 03, 2007

Click for automatic bibliography generation  

HONEYWELL INT INC (US)
TUNG HSUEH SUNG (US)
MUKHOPADHYAY SUDIP (US)
VAN DER PUY MICHAEL (US)
MA JING JI (US)
BORTZ CHERYL (US)
LIGHT BARBARA (US)
PHILLIPS STEVEN D (US)
DUBEY RAJESH (US)
MERKEL DANIEL C (US)

C07C17/087; C07C21/19; C09K5/00

View/Download PDF      PDF Help

Previous Patent: IDENTIFICATION AND/OR TRAIL LIGHT

Next Patent: MEDIA STORAGE CONTAINER WITH COOPERATING DISC RETAINING HUBS