| abstract |
A method of manufacturing a polymeric aluminium chlorhydrate having the empirical formula: A12(OH)6-axa?YH2 wherein X is Cl, Br or I, a is 0.8 to 1.33 and Y is 0.19-1.4, comprising heating an aqueous solution of the aluminium halohydrate with a solution containing an acidic source of halide ions at a temperature of between 80°C and 130°C for a time period of 50 minutes to 10 days, such that the Al/X ratio in the resulting polymer is between 1.5:1 and 2.0:1, and such that the aluminium concentration in the resulting solution is between 0.5 and 3.8wt%, and drying the resultant material to provide a salt having a water content of less than 12wt%. |