Removal of Mg++ and Ca++ ions from NaCl brine
Patent 4405574 Issued on September 20, 1983. Estimated Expiration Date: 
October 2, 2001. 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 2, 2001. 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 3346422 3352800 InventorsApplicationNo. 06/307827 filed on 10/02/1981US Classes:423/157, Ion exchanging or liquid-liquid extracting521/28Previously formed solid ion-exchange polymer admixed with nonreactive material or ion-exchange polymerExaminersPrimary: Schofer, Joseph L.Assistant: Kulkosky, Peter F. Attorney, Agent or FirmInternational ClassesB01J 41/00 (20060101)B01J 47/00 (20060101) B01J 41/10 (20060101) C01D 3/14 (20060101) C01D 3/00 (20060101) AbstractAlkaline earth metal ions, e.g., Mg++ and/or Ca++, are removed from alkali metal brines, e.g., NaCl, by use of a particulate, macroporous, anion exchange resin containing the in-situ reaction product of polymeric, amorphous, hydrous zirconium oxide and a source of PO4 ions, e.g., H3 PO4. |
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