2-Chloro-1,1,1-trifluoroethane → 2-Chloro-1,1,1-trifluoroethane

Temperature

300 °C

To a 600 cc "Hastelloy" C Parr autoclave was added 607.6 gm (4 mole) CsF, 58.1 gm (1 mole) KF and 80 gm (4 mole) HF. The reactor was then warmed to 300° C. with a back pressure regulator set at 300 psig. Liquid HCFC-133a was then continuously fed to the agitated molten mixture at a constant rate of 0.0192 mole per minute by means of a high pressure liquid chromatography (HPLC) pump. Gas samples were then collected continuously as pressure greater than 300 psig was vented by the back pressure regulator. The reactor effluent was sampled automatically and analyzed by gas chromatography (GC). The conversion during the first 1.2 hours was 59%; dropping slowly to 27% over the next 1.2 hours. Selectivity to HFC-134a was greater than 99% over the entire run. HCFC-1122 is also formed by elimination of HF from HCFC-133a and constituted the remaining less than 1%.

1. customGas samples were then collected continuously as pressure greater than 300 psig
2. aliquotThe reactor effluent was sampled automatically
3. customduring the first 1.2 hours
4. customdropping slowly to 27% over the next 1.2 hours

ORD record

ord-faf4a50dbbf940f9a38182c09d40d730

Source dataset

uspto-grants-1991_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04990702