Method for purifying 1-aminoanthraquinone

Details Method for purifying 1-aminoanthraquinone Method for purifying 1-aminoanthraquinone

1983-02-15

1987-09-22

Hollrah, Glennon H.

Metal tools and implements, making

C07C 9724

Patent

active

046954074

ABSTRACT:
A method for purifying 1-aminoanthraquinone which comprises previously subjecting a crude 1-aminoanthraquinone to a removal treatment of inorganic impurities so that their content is reduced to not more than 4 wt. % as converted to ash basis or to a removal treatment of iodine-consuming reductive inorganic impurities so that their content is reduced to not more than 2 wt. % as converted to consumed iodine basis, and then rectifying the 1-aminoanthraquinone.

REFERENCES:
patent: 2738354 (1956-03-01), Kern et al.
patent: 3907828 (1975-09-01), Thiem et al.
patent: 3984425 (1976-10-01), Mori et al.
patent: 4054586 (1977-10-01), Hirai et al.
patent: 9323431 (1982-04-01), Takahashi et al.

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