08.11.05
PROCESS FOR PRODUCING
QUINACRIDONE PIGMENT
Patent No. U.S. 6,818,053 B2
Japan Science and Technology
Corp. has received a patent for a
method for preparation of
quinacridone pigment nanocrystals
with sub micrometer to nanometer
in average size. It is comprised of
supplying supercritical or sub-critical
liquid, which can dissolve
quinacridone pigment, into a reactor
containing quinacridone pigment,
flowing out the supercritical or subcritical
liquid in which quinacridone
pigment is dissolved from the reactor
to a mixing apparatus to which
coolant is supplied, and selecting
the kind of supercritical or sub-critical
liquid and by selecting the combination
of supplying speed of each
liquid, temperature of the liquid and
the reacting pressure.
QUINACRIDONE PIGMENT
Patent No. U.S. 6,818,053 B2
Japan Science and Technology
Corp. has received a patent for a
method for preparation of
quinacridone pigment nanocrystals
with sub micrometer to nanometer
in average size. It is comprised of
supplying supercritical or sub-critical
liquid, which can dissolve
quinacridone pigment, into a reactor
containing quinacridone pigment,
flowing out the supercritical or subcritical
liquid in which quinacridone
pigment is dissolved from the reactor
to a mixing apparatus to which
coolant is supplied, and selecting
the kind of supercritical or sub-critical
liquid and by selecting the combination
of supplying speed of each
liquid, temperature of the liquid and
the reacting pressure.