Sulfonation of anthraquinone in sulfur dioxide solvent

Details Sulfonation of anthraquinone in sulfur dioxide solvent Sulfonation of anthraquinone in sulfur dioxide solvent

1976-12-08

1978-11-07

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260686, C09B 302

Patent

active

041246063

ABSTRACT:
Sulfonation of anthraquinone by a sulfur trioxide component including SO.sub.3 or oleum in a liquid sulfur dioxide solvent. When a mercury catalyst is used to give alpha anthraquinone sulfonate products, most of the mercury is left in the reactor or recovered with unreacted anthraquinone by precipitation with water after vaporization of the sulfur dioxide. High sulfuric acid and mercury pollution are thus avoided.

REFERENCES:
patent: 1963383 (1934-06-01), Rogers
patent: 2244512 (1941-06-01), Brandt
patent: 2706736 (1955-04-01), Birch et al.
patent: 2863912 (1958-12-01), Smith
patent: 3792065 (1974-02-01), Hiller et al.

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