Recovery of Lewis acid/Bronsted acid catalyst with hydrogen at e

Details Recovery of Lewis acid/Bronsted acid catalyst with hydrogen at e Recovery of Lewis acid/Bronsted acid catalyst with hydrogen at e

1977-07-05

1978-10-17

Crasanakis, George

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26068368, 260666P, 260671R, C07C 354, C07C 356, C07C 528

Patent

active

041209125

ABSTRACT:
Deactivated or partially deactivated hydrocarbon conversion catalysts comprising (a) one or more Lewis acids selected from the group consisting of the fluorides, chlorides and bromides of boron(III), titanium(IV), zirconium(IV), hafnium(IV), phosphorus(V), arsenic(V), tantalum(V), niobium(V) and mixtures thereof and (b) a strong Bronsted acid, may be recovered by contacting said catalysts with hydrogen at elevated temperatures and pressures. The preferred Lewis acid is an acidic halide, preferably tantalum pentafluoride, niobium pentafluoride or mixtures thereof. The preferred Bronsted acid is a hydrogen halide, preferably hydrogen fluoride.

REFERENCES:
patent: 2727010 (1955-12-01), Zimmerschied
patent: 3352941 (1967-11-01), Schoen et al.

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