Method of removing and detoxifying a phosphorus-based substance

Details Method of removing and detoxifying a phosphorus-based substance Method of removing and detoxifying a phosphorus-based substance

1985-05-21

1989-07-25

Castel, Benoit

Liquid purification or separation

Processes

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

210643, 210644, 210906, B01D 1300, B01D 1104

Patent

active

048511242

ABSTRACT:
A method of removing organic phosphorus-based poisonous substances from water contaminated therewith and of subsequently destroying the toxicity of the substance is disclosed. Initially, a water-immiscible organic is immobilized on a supported liquid membrane. Thereafter, the contaminated water is contacted with one side of the supported liquid membrane to selectively dissolve the phosphorus-based substance in the organic extractant. At the same time, the other side of the supported liquid membrane is contacted with a hydroxy-affording strong base to react the phosphorus-based substance dissolved by the organic extractant with a hydroxy ion. This forms a non-toxic reaction product in the base. The organic extractant can be a water-insoluble trialkyl amine, such as trilauryl amine. The phosphorus-based substance can be phosphoryl or a thiophosphoryl.

REFERENCES:
patent: 3617546 (1971-11-01), Li et al.
patent: 3637488 (1972-01-01), Li et al.
patent: 3956112 (1976-05-01), Lee et al.
patent: 4064040 (1977-12-01), Singhal et al.
patent: 4244816 (1981-01-01), Volger et al.
patent: 4292181 (1981-09-01), Li et al.

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