Chemistry of inorganic compounds – Halogen or compound thereof – Hydrogen halide
Patent
1974-12-30
1976-08-24
Stern, Edward
Chemistry of inorganic compounds
Halogen or compound thereof
Hydrogen halide
423342, 423467, 423531, 252413, C01B 722, C01B 3308
Patent
active
039767590
ABSTRACT:
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 distillation following which the remaining sulfuric acid rich fraction of the spent catalyst is reacted with a silica containing material to convert most of the remaining residual hydrogen fluoride to silicon fluoride which is volatilized from the mixture to thereby provide a sulfuric acid effluent 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.
REFERENCES:
patent: 1960347 (1934-05-01), Osswald et al.
patent: 2507605 (1950-05-01), Lopker
patent: 2526776 (1950-10-01), Smith et al.
patent: 3199952 (1965-08-01), Zanon et al.
patent: 3677701 (1972-07-01), Hollingsworth et al.
Bennett Richard H.
Brockington James W.
Line, Jr. Lloyd E.
May, Jr. Douglas H.
Ries C. G.
Stern Edward
Texaco Inc.
Whaley T. H.
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