METHOD FOR PRODUCTION OF DERIVATIVES OF 7-HYDROXY-5,6-PHTHALYL PHENOXAZINE Russian patent published in 1997 - IPC

Abstract RU 2076103 C1

FIELD: dyeing of various fibers. SUBSTANCE: method is carried out by boiling of derivatives of 7-hydroxy-2-phenyloxy-4-hydroxyanthraquinone within 2-3 h in acetic anhydride. EFFECT: simplifies the method.

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RU 2 076 103 C1

Authors

Levdanskij V.A.

Polezhaeva N.I.

Kuznetsov B.N.

Dates

1997-03-27Published

1994-12-05Filed