公开(公告)号：US20230011640A1

公开(公告)日：2023-01-12

申请号：US17783844

申请日：2020-12-07

Applicant: CYTEC INDUSTRIES INC.

Inventor： Scott GRIFFIN ,  Joseph CALBICK ,  Dannon STIGERS

IPC: C01F7/473

Abstract: Methods are provided for improved recovery of organic salts, such as ionic liquids or organic salts comprising quaternary organic cations, in an industrial alumina production process, such as the Bayer process. These methods include (i) using an organic salt for the removal of impurities in an industrial process for the production of alumina; (ii) subjecting the spent organic salt to a recycling operation that generates at least one exit stream having a measureable amount of the organic salt {e.g., by entrainment or by solubility of the organic salt in the exit stream); (iii) collecting and treating the exit stream (s) with an inorganic salt, in an amount effective to induce phase separation; and (iv) recovering the organic phase containing the recovered organic salt. These methods and compositions allow alumina refinery plants to use organic salts for removal of industrial process streams in an economical manner, due to the efficient recovery of the organic salt.

公开(公告)号：US20170225962A1

公开(公告)日：2017-08-10

申请号：US15064923

申请日：2016-03-09

Applicant: Cytec Industries Inc.

Inventor： Krzysztof ANDRUSZKIEWICZ ,  Raymond Salvatore FARINATO ,  Haunn-Lin Tony CHEN ,  Scott GRIFFIN ,  Marie E. Anderson

IPC: C01F7/34

CPC classification number: C01F7/34 ,  C01F7/145 ,  C01P2004/61 ,  C01P2006/80

Abstract: Disclosed herein is a method of producing alumina trihydrate crystals from an alumina trihydrate recovery process stream wherein an aqueous emulsion comprising an alkyl or alkenyl succinic anhydride is added to the alumina trihydrate recovery process stream, wherein the aqueous emulsion is substantially free of mineral oils. The method provides a decrease in percentage of alumina trihydrate crystals having a volume average diameter of less than about 45 micrometers compared to the percentage of alumina trihydrate crystals produced in the absence of the aqueous emulsion of an alkyl or alkenyl succinic anhydride.