Catalytic equilibration to improve the relative yield of selecte

Details Catalytic equilibration to improve the relative yield of selecte Catalytic equilibration to improve the relative yield of selecte

1990-07-31

1991-07-09

Lieberman, Paul

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

252 71, 252 70, 252 68, 252 69, 252 73, 62 4, 570151, 570163, 570176, C09K 502, C09K 504, C07C 1700, C07C 1908

Patent

active

050303724

ABSTRACT:
Gas phase and liquid phase processes are disclosed which use interconversion of CF.sub.3 CHFCl and CF.sub.2 HCF.sub.2 Cl in contact with catalyst consisting essentially of halided aluminum oxide and/or aluminum halide at elevated temperatures to increase the mole ratio of one of said compounds in a composition relative to the other. Also disclosed in use of said interconversion along with hydrogenolysis in processes for producing mixtures of CF.sub.3 CH.sub.2 F and CF.sub.2 HCF.sub.2 H from certain compositions comprising CF.sub.2 HCF.sub.2 Cl such that the mole ratio of CF.sub.3 CH.sub.2 F to CF.sub.2 HCF.sub.2 H in the product mixtures produced from said compositions may be increased or decreased.

REFERENCES:
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Miller et al., JACS 72, Rearrangement of Chlorofluorocarbons by Aluminum Chloride, Feb. 1950, pp. 705-707.

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