Method for extracting perchlorate-ion from an aqueous solution

Details Method for extracting perchlorate-ion from an aqueous solution Method for extracting perchlorate-ion from an aqueous solution

2006-12-28

2008-09-16

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S683000

Reexamination Certificate

active

07425270

ABSTRACT:
The invention relates to chemical industry and can be used for extracting perchlorate-ion from a highly concentrated processing solution having a complex nitrate-chloride-sulphate-iodate composition. The inventive method for extracting perchlorate-ion from an aqueous solution comprises passing the solution through a highly basic anionite and subsequent regeneration of the said anionite in a metal salt aqueous solution. The anionite in the nitrate form is used as an anionite, and its regeneration is performed in an aqueous solution of alkali or alkali-earth metal nitrate at the temperature of 0-60° C.

REFERENCES:
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patent: 6448299 (2002-09-01), Brown et al.
patent: 2006/0011550 (2006-01-01), Bourke et al.
patent: 1074589 (1984-02-01), None
patent: 1666450 (1991-07-01), None
Batista, J. R. et al., “The Removal of Perchlorate From Waters Using Ion-Exchange Resins,” Chapter 13, Perchlorate In the Environment, edited by Urbansky, Kluwer Academic/Plenum Publishers, New York, pp. 135-145.
English translation of International Search Report from PCT/RU2005/000364, filed on Jul. 1, 2004.

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