Abstract: The disclosure concerns a process for the manufacture of basic aluminium chlorides in powder form for antiperspirant use which have an aluminium:chloride molar ratio of 1.7:1 to 2.2:1 and has a Band III fraction of at least 20% as determined by a chromatographic procedure. The disclosure centers on the finding of advantageous reaction conditions for the known reaction between aluminium powder and an aqueous aluminium chloride solution. The temperature of reaction is 50.degree. to 105.degree. C. and the final aluminium concentration of the solution is 7.5% to 13%. It has been discovered that if this reaction is carried out sufficiently rapidly a solution of a basic aluminium chloride is produced having a Band III fraction of at least 20%. The disclosure shows the influence of the grade of aluminium and manner of conducting the reaction on reaction time. The solution obtained is dried, preferably spray dried or freeze dried, to give the powder.

Abstract: The disclosure concerns a process for the manufacture of aluminium zirconium halohydrate having an aluminium:zirconium molar ratio of from 2:1 to 7:1 and having a metal:chlorine molar ratio of from 0.9:1 to 2.1:1. Metallic aluminium is dissolved in an aqueous starting solution comprising an oxyhalide, hydroxyhalide or carbonate of zirconium and an aluminium halide or basic aluminium halide, which solution is heated at about 50.degree. C. to 105.degree. C. The solution of the final aluminium zirconium halohydrate has a concentration of metal of 0.5 to 2.3 moles/kg and a size exclusion chromatogram of which the Band III proporition is at least 20%.