Process for preparing 1,1,2-Trichloro-3,3,3-trifluoropropane
View Patent ↗Disclosed is a process for making the compound 1,1,2-trichloro-3,3,3-trifluoropropane (233da) by the catalytic fluorination of 1,1,1,2,3,3-hexachloropropane. 233da is a starting material used in the production cis-1-chloro-3,3,3-trifluoropropene (cis-1233zd).
1. A process for making the compound 1,1,2-trichloro-3,3,3-trifluoropropane (233da) from 1,1,1,2,3,3-hexachloropropane comprising the steps:
(a) fluorinating a metal catalyst consisting of SbCl 5 ; and
(b) fluorinating 1,1,1,2,3,3-hexachloropropane in the presence of the fluorinated metal catalyst at a reaction temperature in the range of 90° C. to 100° C. for a time period in the range of 6 to 20 hours, to produce a reaction mixture containing up to about 35% by weight of 1,1,2-trichloro-3,3,3-trifluoropropane.
2. The process of claim 1 , wherein the fluorination of the catalyst is conducted at a temperature of about 90° C. for about two hours.
3. The process of claim 2 , wherein the fluorination of the hexachloropropane is conducted at a temperature of about 100° C. for about 15 hours.
4. The process of claim 1 , wherein the fluorination of the catalyst is conducted at a temperature of about 70° C. for about two hours.
5. The process of claim 4 , wherein the fluorination of the hexachloropropane is conducted at a temperature of about 100° C. for about 20 hours.