CM-PATRA / record

A process for preparation of aluminium oxide using the bayer process with suspended solid particles removal due to addition of hydroxamic polymers

Publication

UA-53631-C2 on Google Patents

Filed / published / granted

1996-10-28 / 2003-02-17 / 2000-03-27

Offices

RU, UA, EP, IN, DE, AT, OA (includes the Indian office)

Applicants

Cytec Tech Corp (US, foreign-industry)

Minerals

Aluminium (not on list)

Stages

Compounds and materials

Waste stream

None named in the English text

CPC

C01F7/0653, B01D21/01

Abstract (first 170 chars)

The filtration rate of Bayer Process primary settler feed and/or the flocculation in the initial stages of the washer train in the Bayer Process are improved by contacting the settler feed stream or the feed stream to the first stages of the washer train first with a) a lower molecular weight polymer which contains hydroxamic acid and/or salt groups and then with b) a mixture of an anionic polymer and a second, higher molecular weight polymer which contains hydroxamic acid groups.