Triphosphonic esters

Details Triphosphonic esters Triphosphonic esters

1983-10-11

1986-05-06

Miller, Edward A.

Compositions

Absorptive, or bindive, and chemically yieldive

558161, C09K 300

Patent

active

045870349

ABSTRACT:
Triphosphonic ester, each of the three phosphorus atoms of which is bound to a carbon atom of the same hydrocarbon group, having 2 or 4 free acid functions or two salt functions, is prepared by reacting an alkaline-metal derivative of a phosphite diester with a diphosphonic acid tetra-ester, followed by hydrolysis of the compound obtained. The triphosphonic esters may be used for various known uses of phosphonates, including the extraction of heavy metals.

REFERENCES:
patent: 2765279 (1956-10-01), Nusslein
patent: 3256370 (1966-06-01), Fitch et al.
patent: 3471552 (1969-10-01), Budnick
patent: 3534125 (1970-10-01), Knollmueller
patent: 3743688 (1973-07-01), Nicholson et al.
patent: 3993728 (1976-11-01), Schulz
patent: 4105741 (1978-08-01), Wiewiorowski et al.
Hurst, "Solvent Extraction of Uranium from Wet Process Phosphonic Acid," ORNL-TM-2522, p. 39, (1969).

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