Process for the production of fine tabular alumina monohydrate

Details Process for the production of fine tabular alumina monohydrate Process for the production of fine tabular alumina monohydrate

C - Chemistry, Metallurgy

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C01F 7/14 (2006.01) C01F 7/47 (2006.01) C09C 1/40 (2006.01) D21H 17/67 (2006.01) D21H 19/38 (2006.01) D21H 21/52 (2006.01)

Patent

CA 2002254

ABSTRACT A process for the production of fine, tabular alpha-alumina monohydrate crystals characterized by the following steps: - adjustment of a caustic aluminate liquor at temperatures above C8 until the molar ratio of the liquor Na2Ofree/Al2O3 is less than or equal to 1, - cooling of this liquor under the hydrodynamic conditions of intensive agitation in order to induce nuclea- tion of the alpha-alumina monohydrate, and - separation of an alpha-alumina monohydrate product into a fine size and tabular form.

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