Recovery of tellurium from acidic sulfonated ion exchange resins by acid elution
Patent 4244936 Issued on January 13, 1981. Estimated Expiration Date: 
October 9, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 9, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPreparation of glycol esters Patent #: 4073876 InventorsAssigneeApplicationNo. 06/082832 filed on 10/09/1979US Classes:423/509, Binary compound423/510, Elemental selenium or tellurium560/246Preparing polyoxy alcohol esters from olefinsExaminersPrimary: Hearn, Brian E.Attorney, Agent or FirmInternational ClassC01B 19/00 (20060101)AbstractA process for the recovery of tellurium compounds which have been retained on a strongly acidic sulfonated ion exchange resin employed to remove soluble tellurium compounds from tellurium-containing vicinal glycol ester solutions, by elution of the resin with dilute mineral acids, such as hydrochloric, to form a tellurium-containing acid eluate and treating the eluate by stripping or distilling to remove contained water and acid leaving a tellurium compound concentrate which may be treated in the presence of air or oxygen to convert the tellurium to a form suitable for reuse in the preparation of vicinal glycol esters.Other References
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