Mixed anthraquinonedisulfonic acids

Details Mixed anthraquinonedisulfonic acids Mixed anthraquinonedisulfonic acids

1979-03-14

1982-10-19

Warren, Charles F.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423573R, 260370, 260372, 260376, C07C14336, C07C143665

Patent

active

043550126

ABSTRACT:
Mixed disulfoanthraquinonemono-, di-, or polycarboxylic acids produced by the direct sulfonation of an anthraquinone of the formula: ##STR1## wherein n is an integer of 1-4 and each R is independently selected from alkyl of 1-4 carbon atoms and chlorine with at least one R being alkyl and with the proviso that substitution in a single ring is limited to mono, di- or tri-substitution and substitution in two rings is limited to mono or di-substitution in each ring.
The mixed disulfoanthraquinonemono-, di-, or polycarboxylic acids have exceptional utility in the Stretford Process.

REFERENCES:
patent: 1515325 (1924-11-01), Bailey
patent: 1963383 (1934-06-01), Rogers
patent: 2997439 (1961-08-01), Nicklin et al.
patent: 3032560 (1962-05-01), Dawsey
patent: 3459495 (1969-08-01), Lida et al.
patent: 3642448 (1972-02-01), Beavon
Chem. Abstract Index-Jan-Jun 1974-col. 3.
Horyha et al., "Sulfonates of Cyclic Carboxylic Acids", in Chemical Abstracts, vol. 80, 1974, 47649k.

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