The Study of TCA Applied in Organic Removal from Sodium Aluminate Solution

In the process of alumina production using Bayer process technology, organic impurities (like oxalate) can enrich along the production process, which may bring in some serious problems. For example, the mother liquor will thicken, the viscosity will increase, and the sedimentation performance of the red mud will decrease, if the organic impurity content is high. Calcium aluminate hydrate, as one process intermediate product, has small particle size, and a large specific surface area, which has obvious adsorption potential. It has practical significance to study the adsorption and removal of organic in sodium aluminate solution by Tricalcium aluminate hexahydrate (TCA). Based on the above statement, the efficiency of TCA on the oxalate removal was investigated. Besides the influence of different prepared condition for TCA was also investigated using orthogonal experiment method.