Alkylation catalyst recovery process

Details Alkylation catalyst recovery process Alkylation catalyst recovery process

B - Operations, Transporting

01

J

252/126

B01J 23/90 (2006.01) B01J 37/00 (2006.01)

Patent

CA 1062229

ABSTRACT OF THE DISCLOSURE A process for removal of fluoride compounds from spent alkylation catalyst containing fluorosulfonic acid and sulfuric acid wherein hydrogen fluoride and fluorosulfonic acid, in the presence of water, are removed by vacuum dis- tillation following which the remaining sulfuric acid rich fraction of the spent catalyst is treated with an alumina containing material to remove most of the remaining residual fluoride compounds and thereby provide a sulfuric acid ef- fluent free of substantial amounts of fluoride compounds. The hydrogen fluoride recovered is reacted with sulfur trioxide to form fresh fluorosulfonic acid which is combined with sulfuric acid to provide fresh alkylation catalyst.

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