Oxidation process for preparing quinacridone pigments

Details Oxidation process for preparing quinacridone pigments Oxidation process for preparing quinacridone pigments

C - Chemistry, Metallurgy

09

B

C09B 48/00 (2006.01) C07D 471/04 (2006.01)

Patent

CA 2317324

A process for preparing an unsubstituted or substituted quinacridone of the formula (see formula I) or a solid solution of quinacridones of the formula (I), wherein X and Y are independently 1 or 2 substituents selected from hydrogen, fluorine, chlorine, C1-C3alkyl, C1-C3alkoxy and COOR wherein R is hydrogen or C1- C10alkyl in which a salt of a corresponding 6,13-dihydroquinacridone of formula II (see formula II) having the same substitutions as the desired quinacridone of formula I, or a mixture of corresponding 6,13-dihydroquinacridones of formula II, is oxidized with an oxygen containing gas in the presence of an aqueous base and a catalytically effective amount of an oxidation catalyst, characterized in that the oxidation is performed in the presence of an polyglycolic reaction medium of formula R1-O-[(CH2)m-(CHR1')n-O]x-O-R1'' (III).

Affiliated with

Also associated with

Rating

Oxidation process for preparing quinacridone pigments does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1575005