METHOD FOR CATALYTIC DECOMPOSITION OF SODIUM ALUMINATE SOLUTION

摘要

The present invention discloses a process for catalytic decomposition of sodium aluminate solution used in the production of aluminum hydroxide or alumina. A composite catalyst YHC is formed by mixing a composite catalyst YHA and a composite catalyst YHB. The composite catalyst YHC is added into the sodium aluminate solution in a proportion of 1-300 % based on the volume of the sodium aluminate solution, so as to conduct the catalytic decomposition. The initial temperature ranges from 30 to 80 ºC, the terminal temperature ranges from 20 to 70 ºC, and the decomposition time ranges from 1.5 to 80 hours. Said composite catalyst YHA is one of surfactants, alcohols and esters, or a mixture of two or more of the preceding substances. Said composite catalyst YHB is one of sugars and inorganics, or a mixture of two of the preceding substances.