Method of preventing or reducing aluminosilicate scale in a bayer process
AssigneeCytec Technology Corp.
InventorsDonald P. Spitzer, Alan S. Rothenberg, Howard I. Heitner, Frank Kula
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Abstract
Materials and a process are provided whereby polymers with the pendant group or end group containing —Si(OR″)3 (where R″ is H, an alkyl group, Na, K, or NH4) are used to control aluminosilicate scaling in a Bayer process. When materials of the present invention are added to the Bayer liquor before the heat exchangers, they reduce and even completely prevent formation of aluminosilicate scale on heat exchanger walls. The present materials are effective at treatment concentrations that make them economically practical.
Claims18
A process for the reduction of sodium aluminosilicate containing scale in a Bayer process comprising the step of:
- adding to a Bayer process stream an aluminosilicate containing scale inhibiting amount of a polymer having pendant thereto a group or an end group containing Formula I:
- —Si(OR″)3 Formula I
- where R″═H, C1-C10 alkyl, aryl, Na, K or NH4.
Dependencies are inferred from the claim text.