Process for alumina recovery

Details Process for alumina recovery Process for alumina recovery

1984-06-20

1987-07-07

Castel, Benoit

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210734, C02F 154

Patent

active

046785850

ABSTRACT:
Aqueous suspensions of red mud are effectively removed from the Bayer process for making alumina by the addition to at least the first stage of the caustic recovery circuit of a flocculant selected from the group consisting of starch, homopolymers of acrylic acid or acrylates, copolymers of acrylic acid or acrylates containing at least 80 molar percent acrylic acid or acrylate monomers and combinations thereof and subsequent addition to later, more dilute stages in the caustic recovery circuit of a copolymer containing from about 35 to 75 molar percent of acrylic acid or acrylate and from about 65 to 25 molar percent of ethylenically unsaturated polymerizable monomers.

REFERENCES:
patent: 3374143 (1968-03-01), Stephenson
patent: 3445187 (1969-05-01), Sibert
patent: 3479282 (1969-11-01), Chamot et al.
patent: 3479284 (1969-11-01), Lees
patent: 3578586 (1971-05-01), Gal et al.

Affiliated with

Also associated with

Rating

Process for alumina recovery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for alumina recovery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for alumina recovery will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1661359