Process for the preparation of dustless, readily-dispersible pig

Details Process for the preparation of dustless, readily-dispersible pig Process for the preparation of dustless, readily-dispersible pig

1979-05-29

1981-03-10

Morris, Theodore

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Agitating to form larger particles

106262, 106308F, 260 23R, C08L 9100, C09B 6708

Patent

active

042553750

ABSTRACT:
A process for producing a pigment or dyestuff composition in the form of dustless readily dispersible granules, which process comprises contacting, with agitation, an aqueous dispersion of a pigment and a composition comprising one or more organic acids which are liquid at temperatures below 100.degree. C. or their salts, at a pH value at which the acid is insoluble in water, the temperature being maintained during contacting above the melting point of the acid until the pigment has completely transferred into the organic phase; increasing the pH to a value suitable to render the acid soluble in water and recovering the resulting granules.

REFERENCES:
patent: 2268144 (1941-12-01), Vesce
patent: 4015999 (1977-04-01), Robertson et al.
patent: 4170487 (1979-10-01), Robertson

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