Process for removal of fluoride and phosphorus-type contaminants

Details Process for removal of fluoride and phosphorus-type contaminants Process for removal of fluoride and phosphorus-type contaminants

1986-04-04

1988-03-29

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210683, C02F 142

Patent

active

047342005

ABSTRACT:
A process for treating acidic process waste water containing SiF.sub.6.sup.2- is disclosed. The process is carried out by contacting the waste water with a strong base ion exchange resin and loading SiF.sub.6.sup.2- onto the resin. Phosphate ions are then removed from the waste water by raising the pH of the waste water to between about 5.0 and 7.0 and contacting the waste water with a strong base ion exchange resin and loading phosphate ions onto the resin.

REFERENCES:
patent: 4056605 (1977-11-01), Vulikh et al.
patent: 4522726 (1985-06-01), Berry et al.

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