Polymers containing phosphonic acid groups for the treatment of

Details Polymers containing phosphonic acid groups for the treatment of Polymers containing phosphonic acid groups for the treatment of

1995-09-05

1996-07-09

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

210732, 210733, C01F 700, B01D 2100

Patent

active

055342353

ABSTRACT:
The invention comprises a process for improved flocculation of Bayer process red mud-containing slurry. The improvement comprises adding to the red mud-containing liquor a phosphonic acid polymer optionally in addition to the conventional flocculant. The polymer is added to the red mud-containing liquor in an amount sufficient to reduce the concentration of suspended solids in the supernatant phase and/or increase the rate of sedimentation.

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Environmental Phosphorus Handbook, by E. J. Griffith, et al, pp. 258-259, no date.
"The Hydrolysis of Phosphonate Esters", by R. F. Hudson, et al, pp. 2463-2469, 1956, no month, no journal reference.

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