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| Synthesis of 9,10-dihydroxystearic acid from oleic acid in a continuous flow reactor without solvent |
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| DOI： |
| KeyWord:oleic acid continuous flow reactor 9,10-dihydroxystearic acid solvent free |
| FundProject:国家自然科学基金项目(21808085) |
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| Abstract: |
| In order to improve the existing problems in the synthesis of 9,10-dihydroxystearic acid of discontinuous reaction and long reaction time, 9,10-dihydroxystearic acid was synthesized in a continuous flow reactor with oleic acid as the starting material, hydrogen peroxide as the oxidant.After screening catalyst, the synthesis process conditions were optimized by single factor experiment.The results showed that the optimal conditions for the synthesis of 9,10-dihydroxystearic acid were obtained as follows: with phosphotungstic acid as the catalyst, molar ratio of 30% H2O2 to oleic acid 3∶ 1, reaction temperature 60 ℃, catalyst dosage 10% of oleic acid mass, reaction time 23.6 min, and no solvent. Under these conditions, the conversion rate of oleic acid and the selectivity of 9,10-dihydroxystearic acid were 912% and 82.6%, respectively. By utilizing this system, the difficulties associated with the production of 9,10-dihydroxystearic acid in the conventional batch reactor, such as long reaction time and complex processes, were resolved. Additionally, this system is environmentally benign and green. |
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