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Preparation of high-purity oleic acid by urea adduction fractionation and selective hydrogenation |
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KeyWord:high-purity oleic acid urea adduction fractionation selective hydrogenation |
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Abstract: |
With cotton oleic acid as raw material, high-purity oleic acid was prepared by urea adduction fractionation and selective hydrogenation. The process was optimized by single factor experiment. The optimal conditions of urea adduction fractionation were obtained as follows: mass ratio of fatty acid to urea 1∶?2, adduction temperature 5?℃ and adduction time 8 h. The optimal conditions of selective hydrogenation were obtained as follows: dosage of catalyst 1.5%, reaction pressure 0.7 MPa, reaction temperature 165?℃ and reaction time 3 h. The purity of oleic acid reached above 90% by urea adduction fractionation and selective hydrogenation. |
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