Extraction process for removing and recovering metals from aqueo

Details Extraction process for removing and recovering metals from aqueo Extraction process for removing and recovering metals from aqueo

1987-09-08

1989-04-04

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 24, 423 49, 423 54, 423100, 423139, 423157, 4236585, C01G11300

Patent

active

048185035

ABSTRACT:
The purpose of the process is to remove and to recover metals from their aqueous solution by the extraction process. As extractant is used monoesters of phosphonic acid wherein the alkyl group is a phenyl-vinyl group or straight-chained and the ester group is straight-chained. The particular advantage of the process is that the metals can be removed from aqueous solutions to be treated without neutralization of the acid quantity produced during extraction, and this acid solution produced can be circulated e.g. to the stage before the extraction. The process can be used to the removing of metals from the industrial waste waters.

REFERENCES:
patent: 2859094 (1958-11-01), Schmitt et al.
patent: 2869980 (1959-01-01), Grinstead
patent: 3052514 (1962-09-01), Schmitt
patent: 4246103 (1981-01-01), Block et al.
patent: 4356153 (1982-10-01), Bathellier et al.
patent: 4460548 (1984-07-01), Sturtz
Hurst et al., Ind. Eng. Chem. Process Des. Develop., 11 (#1), 1972, pp. 122-128.
Murthy, "Study of Some Phenyl Phosphoric Acids for Extraction of Uranium from Phosphoric Acid", pp. 341-350, IAEA-SM-135/11, (1970).

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