Process for producing .alpha.-anthraquinonesulfonic acids and re

Details Process for producing .alpha.-anthraquinonesulfonic acids and re Process for producing .alpha.-anthraquinonesulfonic acids and re

1988-01-15

1990-07-17

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Polycyclo ring system containing anthracene configured ring...

C07C14336

Patent

active

049422510

ABSTRACT:
The present invention concern a process for producing .alpha.-anthraquinonesulfonic acids in the presence of a metal catalyst in oleum and recovering the metal catalyst which is solubilized in the resulting sulfonation mixture. A porous carrier is introduced into the resulting sulfonation mixture which is subsequently treated with a reducing agent thereby depositing the metal catalyst on the porous carrier.

REFERENCES:
patent: 3763191 (1973-10-01), Schmitz et al.
patent: 3792065 (1974-02-01), Hiller et al.
"Anthraquinone Derivatives", vol. 2, pp. 729-733.
"Palladium-Catalyzed .alpha.-Monosulfonation of Anthraquinone by Sulfur Trioxide in Liquid Sulfur Dioxide", by Y. Kawabata et al., Nat'l Chemical Laboratory for Industry, 1980, pp. 322-325.

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