Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1987-08-21
1989-08-29
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210677, 210681, 210687, 210688, 423356, 521 26, B01D 1504
Patent
active
048614904
ABSTRACT:
A process for the removal of cationic impurities from inorganic solutions and especially wet process phosphoric acid solutions wherein the solutions are passed through an ammonium ion or hydrogen ion charged cation exchange resin to remove various metal cations and thereafter the ion exchange resin is regenerated using an excess volume of ammonium sulfate solution which is subsequently treated to precipitate and filter out the cationic impurities so that the ammonium sulfate solution may be recycled for further ion exchange regeneration.
REFERENCES:
patent: 2628165 (1953-02-01), Bliss
patent: 4511675 (1985-04-01), Auerswald
"Swenson Industrial Scale-Up of a Phosphoric Acid Purification Process", by James E. Van Wyk, P.E. 11/11/86.
Cintins Ivars
Phosphate Engineering & Construction Co., Inc.
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