Recovery of anhydrous acids
Patent 4230887 Issued on October 28, 1980. Estimated Expiration Date: 
February 16, 1998. 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.
February 16, 1998. 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 2430086 2578698 2638481 3448147 Recovering anhydrous acrylic acid Patent #: 3932500 InventorsAssigneeApplicationNo. 05/878196 filed on 02/16/1978US Classes:562/593, Purification or recovery per se203/15, Organic acid203/16, Acetic203/42, Utilizing liquid sorption of component from gas or vapor203/64, Polyhydroxy alcohol or ether derivative thereof562/530, With recycle or recovery of reaction component562/531, Of aldehyde562/532, Producing unsaturated acid562/534, Group VIII metal containing catalyst utilized562/535, Group V metal containing catalyst utilized562/536, Producing acetic acid562/538, Of alcohol562/545, Producing unsaturated acid562/546, Group VIII metal containing catalyst utilized562/547, Group V metal containing catalyst utilized562/548, Producing acetic acid562/549, Alkane562/600, Purification or recovery per se562/606, Saturated lower fatty acids562/608Purification or recovery per seExaminersPrimary: Garner, VivianAttorney, Agent or FirmInternational ClassesC07C 51/42 (20060101)C07C 51/44 (20060101) AbstractC2 -C6 monocarboxylic and dicarboxylic acids are scrubbed from gas phase mixtures of such acids and water by gas absorption techniques utilizing a liquid solvent comprising a polyoxyalkylene glycol or a monoalkyl or dialkyl ether thereof. The solvent enriched with the acid is subjected to distillation to recover a substantially anhydrous acid product.Field of SearchPurification or recovery per sePurification or recovery per se Purification or recovery per se Saturated lower fatty acids With recycle or recovery of reaction component Of aldehyde Producing unsaturated acid Group VIII metal containing catalyst utilized Group V metal containing catalyst utilized Producing acetic acid Of alcohol Producing unsaturated acid Group VIII metal containing catalyst utilized Group V metal containing catalyst utilized Producing acetic acid Alkane |
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