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AssigneeEcolab USA Inc.
InventorsJing WANG, Kevin O'BRIEN, Mingli WEI, Weiguo CHENG, Jinfeng WANG, Kevin MCDONALD, Xinyu C. HUANG
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Methods and compositions for improving performance of flocculants in an industrial production process. Methods include pH triggered cross-linking reaction between a flocculating agent, such as dextran, and a composition comprising a boronic acid-containing polymer. The pH trigger can be provided by a fluid having a pH of 8 or more. The production process can be a Bayer Process and the fluid is caustic liquor or slurry in the fluid circuit of the Bayer, wherein the reaction time is reduced over conventional methods and the cross-linked dextran composition effectuates improved flocculation of the trihydrate particles.
A method for solid-liquid separation in a Bayer process for production of alumina at a production site comprising:
A flocculant composition for solid-liquid separation in a Bayer process for production of alumina comprising a pH triggered cross-linking reaction product of a cross-linking reaction between a flocculating agent and a boronic acid-containing polymer, the cross-linking reaction being triggered by exposing a mixture of the flocculating agent and the boronic-acid-containing polymer to a pH level of 8 or more, wherein the boronic acid-containing polymer is the reaction product of polymerization of at least one water soluble vinyl monomer and at least one vinyl monomer containing a boronic acid moiety.
A method for solid-liquid separation in a mining process for production of a mining product at a production site comprising:
Dependencies are inferred from the claim text.