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US 4,572,788 AGranted
Treatment of contaminated Stretford solution
AssigneeThe Dow Chemical Company
InventorRichard A. Wolcott
Life of this patent
Estimating the term…
Abstract
A side-stream portion of a Stretford Process solution is taken from the main-stream in order to reduce the amount of deleterious side-products in the solution and the ADA values and vanadium values are salvaged from the side-stream by taking up the ADA values on activated charcoal and the vanadium values in an anion exchange resin. The ADA and vanadium values are recovered for re-cycling back to the Stretford Process.
Claims10
A method for removing vanadate values from an alkaline Stretford Process solution, said method comprising
- contacting said Stretford Process solution with an anion exchange resin which takes up vanadate values, and
- removing said Stretford Process solution from said anion exchange resin, leaving vanadate values in said anion exchange resin.
The method of claim 11 wherein vanadate values comprise sodium vanadate.
Dependencies are inferred from the claim text.