Composition and method for improved aluminum hydroxide production
An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C8-C10 fatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 μm which may be readily screened out with minimum trihydrate loss.
Nalco Company
C
C01F
inventional
Jianjun David H Dmitri L James A
Liu Slinkman Kouznetsov Counter