Process for preparing gamma phase quinacridone

Details Process for preparing gamma phase quinacridone Process for preparing gamma phase quinacridone

1979-03-27

1981-01-27

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

106288Q, C09B 4800

Patent

active

042476968

ABSTRACT:
Finely divided gamma crystal phase quinacridone pigments are prepared by a process wherein a crude quinacridone of an arbitrary crystal phase is dissolved in dimethyl sulfoxide in the presence of a caustic alkali and water and then a mineral acid or a mixture of a mineral acid with at least one diluent selected from water, dimethyl sulfoxide and a monohydric alcohol having 1 to 3 carbon atoms is incorporated into the so-formed solution, thereby neutralizing the caustic alkali present in the solution to precipitate a finely divided gamma phase quinacridone.

REFERENCES:
patent: 3201402 (1965-08-01), Bohler et al.
patent: 3738988 (1973-06-01), Jackson
patent: 4094699 (1978-06-01), Fitzgerald

Affiliated with

Also associated with

Rating

Process for preparing gamma phase quinacridone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing gamma phase quinacridone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing gamma phase quinacridone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1182873