Purification of alkylated anthraquinones

Details Purification of alkylated anthraquinones Purification of alkylated anthraquinones

1983-04-25

1985-10-01

Hollrah, Glennon H.

Chemistry of inorganic compounds

Oxygen or compound thereof

Peroxide

423589, 423590, 260369, C01B 15023, C07C 5018

Patent

active

045445435

ABSTRACT:
The invention is for a process for removing unalkylated anthraquinones from alkylated anthraquinone by forming a solution thereof, reducing the solution sufficiently so that at least part of the unalkylated anthraquinone is in the reduced form, and extracting the reduced solution in the absence of an oxidizing agent with an aqueous alkaline solution. The process is especially suited for removing anthraquinone from an alkylated anthraquinone for use in the manufacture of hydrogen peroxide by reducing and oxidizing a solution of the alkylated anthraquinone.

REFERENCES:
patent: 2842563 (1958-07-01), Hinegardner et al.
patent: 2860036 (1958-11-01), Lait
patent: 2901491 (1959-08-01), Eller et al.
patent: 3041143 (1962-06-01), Dawsey
patent: 3132001 (1964-05-01), Denaeyer et al.
patent: 3295928 (1967-01-01), Howe et al.
patent: 3767779 (1973-10-01), Coingt
patent: 3965251 (1976-06-01), Shin et al.

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