Use of polymers in alumina precipitation in the bayer...

Details Use of polymers in alumina precipitation in the bayer... Use of polymers in alumina precipitation in the bayer...

C - Chemistry, Metallurgy

22

B

23/249

C22B 21/04 (2006.01) C01F 7/14 (2006.01) C01F 7/36 (2006.01) C01F 7/47 (2006.01)

Patent

CA 1232118

ABSTRACT OF THE DISCLOSURE The negative effects of sodium oxalate on the crystallization of aluminum trihydrate from Bayer process liquors may be eliminated or curtailed by adding an effective amount of a polyacrylic acid, with a molecular weight about 1,000,000 and containing at least 50 mole percent acrylic acid monomer, to pregnant Bayer process liquors.

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