Hydrous aluminium oxide containing substantially...

Details Hydrous aluminium oxide containing substantially... Hydrous aluminium oxide containing substantially...

C - Chemistry, Metallurgy

01

F

23/244

C01F 7/02 (2006.01) C01F 7/34 (2006.01)

Patent

CA 1246833

ABSTRACT OF THE DISCLOSURE The present invention provides hydrous aluminium oxide which contains substantially pseudobohmite has less than 400 p.p.m. of Na2O, less than 2% by weight of sulphate, a peptization degree of less than 60 minutes and a specific surface area of 200 to 400 sq m per gram. It is produced by allowing aluminium-sulphate solution and sodium-aluminate solution to flow simultaneously into a water reciever such that during the precipitation a constant pH value of <5 is maintained. The pH value is then shifted into the alkaline range by further addition of sodium-aluminate liquor. The precipitation product is aged, filtered off, washed and dried. The hydrous aluminium oxide can be used as a catalyst.

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