Process for removing selenium from sulfur

Details Process for removing selenium from sulfur Process for removing selenium from sulfur

1994-06-07

1995-01-03

Straub, Gary P.

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

423511, 4235671, 4235781, 4235784, 4236585, C01B 1702, C01B 1900

Patent

active

053784480

ABSTRACT:
In a liquid-liquid leaching process for removing selenium from selenium-contaminated sulfur, the selenium-contaminated sulfur in dissolved in an organic solvent to form an organic solution including sulfur and selenium. Selenium in the organic solution is preferentially oxidized to form one or more hydrophilic compounds of selenium. The hydrophilic compounds of selenium are transferred into an aqueous solution by liquid-liquid leaching, thereby removing selenium contaminant from the organic solution and leaving purified sulfur therein. The organic solution is then separated from the aqueous solution for recovering the purified sulfur.

REFERENCES:
patent: 3661535 (1972-05-01), Somerville
patent: 4259511 (1981-03-01), Scholl
patent: 4663141 (1987-05-01), Sonoda et al.

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