Surfactant compositions in alumina precipitation in the...

Details Surfactant compositions in alumina precipitation in the... Surfactant compositions in alumina precipitation in the...

B - Operations, Transporting

01

F

134/55

B01F 17/38 (2006.01) B01F 17/00 (2006.01) C01F 7/14 (2006.01) C01F 7/47 (2006.01)

Patent

CA 1275889

ABSTRACT The invention relates to a composition for use in a method of reducing the percent of small size alumina trihydrate crystals produced during crystallization of alumina trihydrate from a hot, caustic pregnant Bayer process liquor, the composi- tion comprising (A) a surfactant which will not degrade to anything less than a tall oil equivalent in the presence of a hot strong caustic solution, together with (B) an oil carrier or solvent vehicle for the surfactant that has a boiling point safely above that of hot Bayer green liquor undergoing precipitation.

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