process for the preparation of aqueous solutions of basic aluminium chloride.

摘要

it is described a process for the preparation of aqueous solutions of alkaline aluminium chloride of formula al2 (oh) xcly where x ranges from 1 to 3 and y ranges from 3 to 5.characterized by the following stages: a) reaction in a suspension of alumina with hcl in the presence of catalytic amount of sulfuric acid, at atmospheric pressure, at 100 - 125u00b0c and for 8 to 16 hours.when the concentration of hcl in relation to water contained in the reaction mixture is adjusted in such a way that it never exceeded the concentration azeotropica at atmospheric pressure; (b) raffreddameeight of the suspension thus obtained up to room temperature, followed by filtration to remove the alumina is not reagita.