Process for eliminating metal ions from a metal ion-containing liquid with solid chelate resins
Patent 4152493 Issued on May 1, 1979. Estimated Expiration Date: 
April 25, 1997. 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.
April 25, 1997. 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 2875162 2980607 2993782 3337480 3547686 InventorsAssigneeApplicationNo. 05/790744 filed on 04/25/1977US Classes:521/32, Treated with nitrogen-containing material210/688Heavy metalExaminersPrimary: Schofer, Joseph L.Assistant: Kulkosky, Peter F. Attorney, Agent or FirmInternational ClassesA23K 1/16 (20060101)B01J 45/00 (20060101) Foreign Application Priority Data1976-04-27 JPAbstractMetal ions, for example, heavy metal ions, alkaline earth metal ions and aluminium ions are eliminated by bringing a liquid containing the metal ions into contact with a special chelate resin in which chelating carboxylic anion groups are associated with basic amino acid cations, for example, lysine, ornithine, histidine, arginine, ,ଲ-diaminopropionic acid, ,γ-diaminobutyric acid, L-citrulline and δ-oxylysine. | |
