Process for obtaining basic aluminum hydroxy carbonate...

Details Process for obtaining basic aluminum hydroxy carbonate... Process for obtaining basic aluminum hydroxy carbonate...

C - Chemistry, Metallurgy

01

F

23/14

C01F 7/00 (2006.01) B21D 39/06 (2006.01)

Patent

CA 1043074

ABSTRACT OF THE DISCLOSURE A basic aluminum hydroxycarbonate hydrate is provided by a process simultaneously flowing into water, an aqueous solu- tion of aluminum sulfate and an aqueous solution of at least one of an alkali-metal bicarbonate and an alkali-metal carbonate to form a reaction mixture, maintaining a neutral to alkaline pH and allowing precipitation of a precipitate of an aluminum hydroxy- carbonate from said reaction mixture, adjusting the pH of said reaction mixture, after completion of said precipitation, to a pH of about 5.5 to about 6.5 by addition of a salt of aluminum which hydrolyses in aqueous solution to show an acid reaction, and filtering and washing said precipitate.

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