Process for the adsorptive removal of arsenic, antimony and/or bismuth from an aqueous solution
Patent 4046687 Issued on September 6, 1977. Estimated Expiration Date: 
September 6, 1994. 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.
September 6, 1994. 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 References 3332737 3696012 InventorAssigneeApplicationNo. 05/672334 filed on 03/31/1976US Classes:210/674, Utilizing organic regenerant210/681, Removing ions423/87Group VA metal or arsenic (Sb, Bi, or As)ExaminersPrimary: Wyse, Thomas G.Assistant: Cintins, Ivars Attorney, Agent or FirmForeign Application Priority Data1975-04-11 DTAbstractA process for the adsorptive removal of one or more impurity elements, selected from the group which consists of: arsenic, antimony and bismuth, from an aqueous solution containing same in which the solution is contacted with a water-insoluble or low-solubility salt of phosphoric acid or a phosphoric acid ester (phosphate ester) on a porous substrate. |
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