Antifoam/defoamer compositions for Bayer process

Details Antifoam/defoamer compositions for Bayer process Antifoam/defoamer compositions for Bayer process

1993-03-12

1994-09-13

Langel, Wayne

Chemistry: physical processes

Physical processes

423119, 423121, 423130, 252321, 252358, B01J 1900, C01F 704, C01F 706, C01F 708

Patent

active

053465113

ABSTRACT:
A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a polyether surfactant and a polyhydric alcohol fatty acid ester.

REFERENCES:
patent: 4009119 (1977-02-01), Poschmann et al.
patent: 4036931 (1977-07-01), Roberson et al.
patent: 4280987 (1981-07-01), Yamada et al.
patent: 4434142 (1984-02-01), Huckabay
patent: 4968448 (1990-11-01), Svarz
patent: 5275628 (1994-01-01), Dimas et al.
Search 4496: Polypropylene Glycol in the Bayer Alumina Process (no date).

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