Process for purifying impure sulphuric acid

Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing

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423525, C01B 1790, C01B 1774

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active

055018475

ABSTRACT:
The invention concerns a process for purifying sulphuric acid, particularly after it has acted as a catalyst in aliphatic alkylation reactions.
It is characterized in that the sulphuric acid is impregnated into a porous organic or inorganic support, for example silica, and is then calcined at least once to eliminate organic hydrocarbon substances which the sulphuric acid may contain.

REFERENCES:
patent: 2110267 (1938-03-01), Harrington et al.
patent: 2553407 (1951-05-01), Epps, Jr. et al.
patent: 2992070 (1961-07-01), Henley
patent: 3030411 (1962-04-01), Leum et al.
patent: 3578390 (1971-05-01), Kruel et al.
patent: 3677701 (1972-07-01), Hollingsworth et al.
Derwent Publication Ltd., Database WPI, Week 8222, AN 82-44602E, JP-A-57 067 008, Apr. 23, 1982, abstract.

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