Dispersion of pigments by cryogenic attrition

Details Dispersion of pigments by cryogenic attrition Dispersion of pigments by cryogenic attrition

1976-01-06

1977-03-22

Custer, Jr., Granville Y.

Solid material comminution or disintegration

Processes

With solidifying, consolidating or shaping

241 14, 241 17, B02C 2306

Patent

active

040132323

ABSTRACT:
In order to disperse a pigmented filtercake, i.e. break up the pigment into fine particles suspended in water, a mixture of filtercake, water and a stabilizer are subjected to ice particles. The mixture of ice particles, filtercake and water are then agitated and the particles of ice act as an abrasive to break up and disperse the pigment. The stabilizer prevents the dispersed particles from re-agglomerating. The process is continuous in that the water is bled off and flowed through an ice flaker where the ice particles are formed preparatory to return to the mixture, all until the dispersion has reached the desired degree.

REFERENCES:
patent: 2100151 (1937-11-01), Tietz
patent: 2836368 (1958-05-01), McCoy
patent: 2841339 (1958-07-01), Gilmore
patent: 2893216 (1959-07-01), Seefeldt et al.
patent: 3072347 (1963-01-01), Dombrowski

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