Recovery of carboxylic acids from water by precipitation from organic solutions
Patent 5104492 Issued on April 14, 1992. Estimated Expiration Date: 
July 11, 2010. 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.
July 11, 2010. 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 2398485 2539472 2592964 3023238 3329712 3786096 3810937 Purification process Recovery of anhydrous acids Recovery of acids from aqueous solutions InventorsApplicationNo. 550959 filed on 07/11/1990US Classes:203/15, Organic acid203/43, Utilizing liquid-liquid extracting of distillation product203/47, Utilizing removing solid from liquid203/48, By crystallizing562/485, Purification or recovery per se562/486, By crystallization562/490, Naphthyl group562/494, Purification or recovery per se562/554, Purification or recovery per se562/593Purification or recovery per seExaminersPrimary: Bascomb, Wilbur L. Jr.Attorney, Agent or FirmForeign Patent References
International ClassesB01D 003/00C07C 051/48 AbstractCarboxylic acids are recovered from wet organic solutions by reducing the solutions' water content thus causing the acids to precipitate as recoverable crystals.Other References
Field of SearchOrganic acidUtilizing liquid-liquid extracting of distillation product Utilizing removing solid from liquid By crystallizing Acetic Purification or recovery per se Purification or recovery per se By crystallization Naphthyl group Purification or recovery per se Purification or recovery per se Saturated lower fatty acids |
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