C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/06 (2006.01) C01F 7/06 (2006.01)
Patent
CA 2493521
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.
L'invention concerne des matériaux, et un procédé consistant à utiliser des polymères possédant un groupement pendant ou un groupement terminal contenant - -Si(OR'')¿3? (où R'' représente H, un groupe alkyle, Na, K, ou NH¿4?), pour lutter contre la formation de tartre d'aluminosilicate dans un procédé Bayer. Lorsque les matériaux selon la présente invention sont ajoutés à la liqueur Bayer avant les échangeurs de chaleur, ils réduisent et empêchent même totalement la formation de tartre d'aluminosilicate sur les parois des échangeurs de chaleur. Les présents matériaux sont efficaces à des concentrations de traitement qui les rendent économiquement avantageux
Heitner Howard I.
Kula Frank
Rothenberg Alan S.
Spitzer Donald P.
Cytec Technology Corp.
Smart & Biggar
LandOfFree
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