Preparation of basic aluminium halides

Details Preparation of basic aluminium halides Preparation of basic aluminium halides

C - Chemistry, Metallurgy

01

F

23/164

C01F 7/48 (2006.01) C01F 7/02 (2006.01) C01F 7/56 (2006.01) C01F 7/64 (2006.01)

Patent

CA 1323746

ABSTRACT The disclosure concerns a process for the manufacture of basic aluminium halides in powder form which have an aluminium:halide molar ratio of 1.7:1 to 2.2:1 and contain more than 20% of the aluminium in the Band III fraction as determined by a chromatographic procedure. The disclosure centres on the finding of reaction conditions for the known interaction between aluminium and aluminium halides which lead directly to a solution of a basic aluminium halide having more than 20% of the aluminium in the Band III fraction. The temperature of reaction is 50° to 105°C and the final aluminium concentration of the solution is 0.8% to 6.75%. The solution is dried, preferably spray dried or freeze dried, to give the powder. The preparation of powders having at least 20% of the aluminium contained in Al13O40 species is also described.

501579

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