Process for the recovery of selenium from selenium-containing ur

Details Process for the recovery of selenium from selenium-containing ur Process for the recovery of selenium from selenium-containing ur

1976-09-15

1977-07-26

Stern, Edward

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

Elemental selenium or tellurium

423508, 423509, 75 81, 75169, C01B 1900

Patent

active

040383750

ABSTRACT:
A process for the recovery of selenium from a urethane solution containing selenium compounds by contacting the selenium-containing urethane solution at a suitable temperature with an aqueous solution of a mercuric salt compound or mixtures thereof to form an insoluble precipitate of mercury-selenium compounds or complexes. The selenium and mercury may be recovered from the resulting precipitate in a form suitable for reuse in the preparation of urethanes and selenium removal respectively.

REFERENCES:
patent: 1915703 (1933-06-01), Towne et al.
patent: 2406666 (1946-08-01), Clark et al.
patent: 2616791 (1952-11-01), Roseman et al.
patent: 3577216 (1971-05-01), Weiss et al.
patent: 3677696 (1972-07-01), Bryk et al.
patent: 3895054 (1975-07-01), Zajacek et al.
"Extractive Metallurgy", vol. 81, 1974, p. 257.

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