Removal of selenium from urethane solutions

Details Removal of selenium from urethane solutions Removal of selenium from urethane solutions

1977-12-27

1978-12-19

Thomas, Earl C.

Chemistry of inorganic compounds

Selenium or tellurium or compound thereof

Binary compound

423510, 560 25, C01B 1900

Patent

active

041306333

ABSTRACT:
A method for the removal and recovery of selenium from a urethane solution containing selenium compounds, which may be in the form of inorganic selenium and/or organoselenium compounds, which comprises contacting the selenium-containing urethane solution at a suitable temperature with an aqueous hydrogen peroxide solution and recovering the selenium from the resulting selenium compound enriched aqueous phase in a form suitable for reuse in the preparation of urethanes, the deselenized urethane remaining in the hydrocarbon and/or organic phase.

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patent: 3577216 (1971-05-01), Weiss et al.
patent: 3895054 (1975-07-01), Zajacek
patent: 4038375 (1977-07-01), Vorachek et al.
patent: 4038376 (1977-07-01), McCoy et al.
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patent: 4041139 (1977-08-01), Washall
patent: 4055629 (1977-10-01), Rosenthal
patent: 4055630 (1977-10-01), McCoy et al.

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