Process for the purification of copper phthalocyanine

Details Process for the purification of copper phthalocyanine Process for the purification of copper phthalocyanine

1973-12-21

1977-03-01

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 4704

Patent

active

040101800

ABSTRACT:
A process for the purification of optionally substituted crude phthalocyanines wherein a phthalocyanine is introduced into a 84 to 88 % sulfuric acid, the phthalocyanine sulfate formed is subjected to a crystal growth at 60 - 100.degree. C in an inert gas atmosphere, the phthalocyanine sulfate is isolated and the phthalocyanine is recovered by hydrolysis with water. By this process a phthalocyanine sulfate is formed in a coarse crystalline form which can easily be filtered and which furtheron can easily be processed to a valuable pigment of the .alpha.-modification.

REFERENCES:
patent: 2284685 (1942-06-01), Detrick et al.
patent: 2365464 (1944-12-01), Gross
patent: 2602800 (1952-07-01), Barnhart
patent: 2917518 (1959-12-01), Merner
patent: 3717493 (1973-02-01), Griswold
patent: 3801591 (1974-04-01), Jackson
Chemical Abstracts, vol. 78, abst. No. 31416e (1973), (abst. of German Offen. 2,159,912).
Venkataraman, Chemistry of Synthetic Dyes, vol. V, p. 248 (1971).

Affiliated with

Also associated with

Rating

Process for the purification of copper phthalocyanine 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 the purification of copper phthalocyanine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the purification of copper phthalocyanine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1352279