Conditioning of finely divided crude organic pigments

Details Conditioning of finely divided crude organic pigments Conditioning of finely divided crude organic pigments

1982-09-20

1984-05-29

Raymond, Richard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

106309, 260208, 26024586, 26024587, 260369, 546 49, 546 73, 548457, 549 52, 568368, C09B 4704, C09B 4730

Patent

active

044516541

ABSTRACT:
A process for the preparation of deeply colored organic pigments by crystallizing finely divided crude organic pigments, whose primary particles have a size of .ltoreq.0.2 .mu.m, in C.sub.3 -C.sub.5 -alkanes, C.sub.3 -C.sub.5 -alkenes or C.sub.1 -C.sub.3 -chloroalkanes at from 40.degree. to 250.degree. C. to under atmospheric pressure or superatmospheric pressure, and isolating the pigment.
The pigments obtained by the process give deep, brilliant colorations.

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patent: 3730750 (1973-05-01), Fabian
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patent: 4224222 (1980-09-01), Spietschka et al.
patent: 4298526 (1981-11-01), Sappok et al.
patent: 4370270 (1983-01-01), Bock et al.

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