Purification of ammonium metallate solutions

Details Purification of ammonium metallate solutions Purification of ammonium metallate solutions

2007-05-15

2007-05-15

Fortuna, Ana (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S660000, C210S661000, C210S681000, C210S195200, C423S049000, C423S053000, C423S054000, C423S055000, C423S056000, C502S321000

Reexamination Certificate

active

10935563

ABSTRACT:
A process for reducing the content of alkali metal impurities (e.g., potassium) in ammonium metallate solutions is described. The process involves subjecting a feed solution containing ammonium metallate and alkali metal impurities to membrane filtration. The membrane filtration results in the formation of a retentate having a reduced level alkali metal relative to the feed solution, and a permeate containing substantially the balance of alkali metal. The permeate may also be further treated, to remove alkali metal there from, by passage through a cation exchange column, thereby forming a cation exchange treated permeate that may be combined with the retentate of the membrane filtration step.

REFERENCES:
patent: 3393971 (1968-07-01), Vanderpool et al.
patent: 3848048 (1974-11-01), Ronzio et al.
patent: 4207296 (1980-06-01), Nauta et al.
patent: 4525331 (1985-06-01), Cheresnowsky et al.
patent: 4596701 (1986-06-01), Cheresnowsky et al.
patent: 4601890 (1986-07-01), Cheresnowsky
patent: 4604226 (1986-08-01), Cheresnowsky et al.
patent: 4612172 (1986-09-01), Brunelli et al.
patent: 4643884 (1987-02-01), Cheresnowsky et al.
patent: 4933152 (1990-06-01), Scheftic et al.
patent: 5676817 (1997-10-01), Gutknecht et al.
patent: 5891407 (1999-04-01), Gutknecht et al.
patent: 6113868 (2000-09-01), Mathy et al.
patent: 6117327 (2000-09-01), Ciora et al.
patent: 2005/0072735 (2005-04-01), Stoller et al.

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