Method of recovering HF from mixtures containing C1 -C3 halocarbon compounds
Patent 3947558 Issued on March 30, 1976. Estimated Expiration Date: 
March 30, 1993. 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.
March 30, 1993. 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 2450414 2450415 2478362 InventorAssigneeApplicationNo. 389101 filed on 08/16/1973US Classes:423/483, Hydrogen fluoride203/80, Initial distillation under positive pressure or vacuum423/481, Hydrogen halide423/488, Recovery or purification570/180Including extraction with organic liquidExaminersPrimary: Sebastian, Leland A.Attorney, Agent or FirmAbstractHydrogen fluoride can be separated from an organic mixture of fluorinated C1 -C3 compounds and recovered for reuse by selectively absorbing the HF in a glycol in which the HF is soluble, but the fluorinated organic compound is substantially insoluble. If desired, HF can be obtained in anhydrous form. |
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