Process for the separation and recovery of extractant from spent

Details Process for the separation and recovery of extractant from spent Process for the separation and recovery of extractant from spent

1991-08-27

1993-02-23

Morris, Theodore

Liquid purification or separation

Processes

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

210638, 423 10, 423 70, 252631, B01D 1100, B01D 1104

Patent

active

051887363

ABSTRACT:
A new chemical separation process was developed in this invention using 2-methoxyethanol or methyl collosolve (MCS) and ethylene glycol (EG) as separation agents, to separate the valuable extractants such as di(2-ethylhexyl) phosphoric acid(D2EHPA), tri n-octyl-phosphine oxide (TOPO) from spent solvent and to recover the extractants. The process comprises separation and recovery sections. In the separation section the extractants were removed by the polar solution from spent solvent based on the difference of miscibilities. In the recovery section, the polar solution loaded with extractants was distillated under vacuum to remove MCS as a distillate and water was added to the bottom product to facilitate the separation of the extractants. By using this novel process, 99% of D2EHPA and 70% of TOPO in the spent solvent were separated and 98% of D2EHPA was recovered. MCS and EG can be regenerated and reused in the process.

REFERENCES:
patent: T970007 (1978-05-01), McCullough et al.
patent: 3711591 (1973-01-01), Hurst et al.
patent: 4180545 (1979-12-01), McCullough et al.
patent: 4207294 (1980-06-01), Hirono
patent: 4255396 (1981-03-01), Kim
patent: 4302427 (1981-11-01), Beny et al.
patent: 4382066 (1983-05-01), Rose
patent: 4432946 (1984-02-01), Ginisty et al.
patent: 4442071 (1984-04-01), Lieser et al.
patent: 4490336 (1984-12-01), Worthington et al.
patent: 4544530 (1985-10-01), Tsai et al.
patent: 4765834 (1988-08-01), Ananthapadmanabhan

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