公开(公告)号：US20180072583A1

公开(公告)日：2018-03-15

申请号：US15696203

申请日：2017-09-06

Applicant: Cytec Industries Inc.

Inventor： Dannon Stigers ,  Marie E. Anderson

IPC: C01F7/34

CPC classification number: C01F7/34 ,  C01F7/02 ,  C01F7/08 ,  C01F7/145

Abstract: Disclosed herein are methods of producing alumina trihydrate crystals from an alumina trihydrate recovery process stream wherein an aqueous emulsion comprising a crystal growth modifier, which is at least one of an acyclic anhydride or 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 crystal growth modifier. The process does not require the addition of a defoamer/anti-foam agent in order to control foam generated in the process.

公开(公告)号：US10259721B2

公开(公告)日：2019-04-16

申请号：US15696203

申请日：2017-09-06

Applicant: Cytec Industries Inc.

Inventor： Dannon Stigers ,  Marie E. Anderson

IPC: C01F7/34 ,  C01F7/02 ,  C01F7/08 ,  C01F7/14

Abstract: Disclosed herein are methods of producing alumina trihydrate crystals from an alumina trihydrate recovery process stream wherein an aqueous emulsion comprising a crystal growth modifier, which is at least one of an acyclic anhydride or 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 crystal growth modifier. The process does not require the addition of a defoamer/anti-foam agent in order to control foam generated in the process.

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.