Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigment

Details Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigment Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigment

1989-08-22

1990-11-13

Lander, Ferris H.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106904, 552212, C08K 517

Patent

active

049699547

ABSTRACT:
Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigments by desulphonation of 4,4'-diamino-1,1'-dianthraquinonyl-3,3'-disulphonic acid in sulphuric acid, characterized in that after the desulphonation water is added to the sulphuric acid solution, 4,4'-diamino 1,1'-dianthraquinonyl is isolated as sulphate, the sulphate is hydrolyzed, if necessary by redissolving it in sulphuric acid and adding the solution to water, and the pigment is isolated, if necessary, after treatment with an organic solvent.

REFERENCES:
patent: 3194820 (1965-07-01), Grelat
patent: 3234242 (1966-02-01), Jost et al.

Affiliated with

Also associated with

Rating

Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigment 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 4,4'-diamino-1,1'-dianthraquinonyl pigment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing 4,4'-diamino-1,1'-dianthraquinonyl pigment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-775021