Dual injection of two polymeric filtration aids for gypsum...

Details Dual injection of two polymeric filtration aids for gypsum... Dual injection of two polymeric filtration aids for gypsum...

2008-07-08

2008-07-08

Hruskoci, Peter A. (Department: 1797)

Liquid purification or separation

Processes

Separating

C210S727000, C210S734000, C423S321100

Reexamination Certificate

active

07396474

ABSTRACT:
A process to improve the polymeric filtration aid performance used in removal of gypsum from phosphoric acid/gypsum slurry. A synergistic effect has been observed by using a Dual Injection method. This method more specifically involves using two polymers (A & B) of different chemistry and injecting into slurry at a different time. The polymer chemistry of filtration aid A is selected from the group consisting of non-ionic, anionic, and cationic polymers and the polymer chemistry of filtration aid B is selected from the group consisting of sulfonated polymers. The polymer (A & B) usage is reduced by around 50% and performance improved.

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