Method of production of a solution of sodium aluminate discolored and aluminium hydroxide tres white from that - ci

摘要

The present invention relates to a process for the production of a solution of sodium aluminate discoloured, which comprises the heat treatment of a suspension comprising magnesium oxide and a solid solution of sodium aluminate, of a suspension comprising magnesium oxide, aluminum hydroxide and a solid solution of sodium aluminate less concentrated or a suspension comprising magnesium oxide, aluminum hydroxide and a solid solution of sodium hydroxide at a temperature of 130°C. or more, then the removal of a solid constituent, as well as a process for the production of aluminium hydroxide very white by precipitation of aluminum hydroxide from a solution of sodium aluminate produced by the previous process.