PROCESS FOR RECOVERING ALUMINUM HYDROXIDE CRYSTALS FROM A TURKISH BAYER PROCESS LIQUOR BY ADDING A CRYSTALLIZATION MODIFIER TO THE LIQUOR, AND COMPOSITION OF IMPROVED CRYSTALLIZATION MODIFIER

摘要

A process for recovering aluminum hydroxide crystals from a turgid bayer process liquor by the addition of a crystallization modifier to the liquor, which is an improved process for the production of aluminum hydroxide from a bayer process liquor containing an aqueous 50db aluminate phase and the liquor is produced by the separation of caustic insoluble suspended solids, improved crystallization modifier composition for the production of aluminum hydroxide by the bayer process, the bayer process to produce aluminum hydroxide crystals that have reduced fines formation simultaneously with an upward change in the aluminum hydroxide particle size distribution without a substantial reduction in the total yield of the aluminum hydroxide product and aluminum hydroxide crystals is an improved method and a composition to produce aluminum hydroxide crystals in a turgid proce liqueur bayer, which involves the addition of a crystallization modifier comprising a C 8 -C 10 fatty acid, precursors, salts, or mixtures thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier results in a commercial yield in the presence and absence of a hydrocarbon oil that dissolves fatty acid.