Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1975-12-18
1977-07-05
Douglas, Winston A.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252411R, 26068363, 423467, 423484, 423525, 423531, B01J 3700, C01B 1746, C07C 354
Patent
active
040338991
ABSTRACT:
A process for removal of fluoride compounds from spent alkylation catalyst containing fluorosulfonic acid and sulfuric acid wherein said spent catalyst is hydrolyzed in the presence of water, at subatmospheric pressure in a vacuum digestion zone for conversion of a major portion of fluorosulfonic acid to hydrogen fluoride, wherein said hydrogen fluoride is removed from the vacuum digestion zone as a vapor, and wherein the remaining sulfuric acid rich liquid fraction of the spent catalyst is treated with silica-alumina cracking catalyst for removal of most of the remaining residual fluoride compounds for providing a sulfuric acid effluent substantially free 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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Bennett Richard H.
Brockington James W.
Klock Byron V.
Douglas Winston A.
Konopka P. E.
May, Jr. Douglas H.
Ries Carl G.
Texaco Inc.
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