Method of enrichment of oxygen-18 in natural water

Details Method of enrichment of oxygen-18 in natural water Method of enrichment of oxygen-18 in natural water

1990-06-08

1991-10-15

Sever, Frank

Liquid purification or separation

Processes

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

55 16, 203 91, 203DIG17, B01D 6136

Patent

active

050572253

ABSTRACT:
A method for the enrichment of natural water in oxygen-18. Permeation followed by phase transition of lighter isotopes of water across a hydrophobic semipermeable membrane are employed to enrich the natural water in O-18 isotopes. Unexpectedly large fractionation factors have been found.

REFERENCES:
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patent: 3953568 (1976-04-01), Seko et al.
patent: 4284418 (1981-08-01), Andres
patent: 4285701 (1981-08-01), Schlenker
patent: 4331522 (1982-05-01), Pierini
patent: 4399120 (1983-08-01), Cheung
patent: 4504460 (1985-03-01), Mandrin
patent: 4770785 (1988-09-01), Schaupert
patent: 4818345 (1989-04-01), Jonsson
patent: 4879041 (1989-11-01), Kuroka et al.
U.S. application Ser. No. 07/535,172, filed Jun. 18, 1990, entitled "Enrichment of Water in Components of Heavy Water".

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