Preparative processes for dihydroxygermanium phthalocyanine

Details Preparative processes for dihydroxygermanium phthalocyanine Preparative processes for dihydroxygermanium phthalocyanine

1994-04-18

1996-02-13

Shah, Mukund J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540122, C09B 6750

Patent

active

054912288

ABSTRACT:
A process for the preparation of dihydroxygermanium phthalocyanine, polymorphic Type III, which comprises treating dihalogermanium phthalocyanine or dialkoxygermanium phthalocyanine with a strong acid, followed by treatment with water, optionally washing with a dilute aqueous base and water, and subsequently optionally admixing with a solvent mixture comprised of a strong organic acid and aprotic organic solvent.

REFERENCES:
patent: 4557989 (1985-12-01), Branston et al.
patent: 5153313 (1992-10-01), Kazmaier et al.
patent: 5166339 (1992-11-01), Duff et al.
patent: 5360475 (1994-11-01), Nukada et al.

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