Blends of hydroxamated polymer emulsions with polyacrylate emulsions

Patent 5516435 Issued on May 14, 1996. Estimated Expiration Date:

May 30, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3345344

3390959

3445187

3578586

3716617

Red mud treatment
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Inventor

Lewellyn, Morris E.

Assignee

Cytec Technology Corp.

Application

No. 454472 filed on 05/30/1995

US Classes:

210/728, Including organic agent209/5, Deflocculation and flocculation210/733, Acrylic210/734, Nitrogen containing (e.g., amine, azo, etc.)423/121, From bauxite423/122Forming insoluble substance in liquid

Examiners

Primary: Hruskoci, Peter A.

Attorney, Agent or Firm

Schultz; Claire M., Lau; Bernard, Lerman; Bart E.

Foreign Patent References

0514648 EP. 11/13/1992

International Class

B01D 021/01

Abstract

A composition comprising a blend of an inverse emulsion of a hydroxamated polymer and a second inverse emulsion of a second polymer selected from the group consisting of alkali metal (meth)acrylate homopolymers, ammonium (meth)acrylate homopolymers, and copolymers of the (meth)acrylates with (alk)acrylamides, wherein the molar ratio of hydroxamated polymer to said second polymer in the emulsion is within the range of about 99:1 to 15:85 when the second polymer is an alkali metal (meth)acrylate homopolymer or copolymer and is within the range of about 99:1 to 58:42 when said second polymer is an ammonium (meth)acrylate homopolymer or copolymer. Processes for removing suspended solids from Bayer alumina process streams using these compositions are also provided.