Process for the removal of selenium compounds from urethane solu

Details Process for the removal of selenium compounds from urethane solu Process for the removal of selenium compounds from urethane solu

1976-12-13

1977-10-25

Stern, Edward

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

Binary compound

423604, C01B 1900, C01G 302

Patent

active

040556298

ABSTRACT:
A process for the recovery of selenium from a urethane solution containing selenium compounds which comprises contacting the selenium-containing urethane solution at a suitable temperature with copper (I) chloride, oxygen or an oxygen-containing gas such as air, and a complexing solvent such as an amine or nitrile to form an insoluble precipitate of copper-selenium compounds or complexes. The selenium and copper may be recovered from the resulting precipitate in a form suitable for reuse in the preparation of urethanes and selenium removal respectively.

REFERENCES:
patent: 2084394 (1937-06-01), Heberlein
patent: 3627486 (1971-12-01), Nakano
patent: 3848069 (1974-11-01), Carey et al.

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