Method for producing dry organic pigment

Details Method for producing dry organic pigment Method for producing dry organic pigment

2011-07-19

2011-07-19

Powers, Fiona T (Department: 1626)

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

Organic compounds

Azo

C106S496000

Reexamination Certificate

active

07982019

ABSTRACT:
The present invention provides a method for producing dry organic pigment, comprising the successive steps of, in this order: a first step wherein a wet organic pigment is obtained by drying an organic pigment presscake at 70 to 150° C. to a moisture content of 5 to 30%, and a second step wherein a dry organic pigment is obtained by pulverizing and drying the wet organic pigment at a temperature that is higher than the temperature employed in the first step but lower than the decomposition temperature of the organic pigment. The method for producing dry organic pigment enables the dry organic pigment to be obtained with superior productivity while consuming less energy than conventional methods.

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Machine Translation of JP 2006-063306, Mar. 2006.
Supplementary European Search Report dated Mar. 29, 2011, issued for the corresponding European Patent Application No. 07 82 9889.0.

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