Process for preparing organic pigments of high tinctorial streng

Details Process for preparing organic pigments of high tinctorial streng Process for preparing organic pigments of high tinctorial streng

1978-01-30

1979-05-29

McCarthy, Helen

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288Q, 165 94, C09B 6700

Patent

active

041566173

ABSTRACT:
An improved process for preparing an organic pigment having a high tinctorial strength by heating a crude organic pigment as an aqueous suspension having a consistency suitable for being pumped, to a temperature of from 80.degree. to 300.degree. C. and for a period of from 10 seconds to 20 minutes in a continuously operating flow apparatus which is shaped as a heat exchanger provided with moving internal elements.

REFERENCES:
patent: 1977582 (1934-10-01), Hanahan
patent: 2964532 (1960-12-01), Klenke
patent: 4077972 (1978-03-01), Baurecht et al.
Perry et al., Chem. Eng. Handbook, 5th ed., (1973), pp. 19-21 and 19-22.
Twin-Screw Compounding Extruder Type ZSK 53/variable, pub. by Werner-Pfleiderer.
Sales and Spec'n, Pamphlets on AP (All-Phase) Reactors of List, (German Language Portion is 1973, Pub'n).

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