Castor oil and its three derivatives including methyl ricinoleate, sodium ricinoleate and ricinoleic acid were used as the raw material for alkali fusion to prepare sebacic acid. The reaction parameters including catalyst, ratio of oleochemicals/NaOH, reaction time and reaction temperature were optimized. It was found that Pb₃O₄ (1%) showed the best catalytic performance, and 553 K was considered as the most suitable reaction temperature. The oleochemicals/NaOH ratios of 15:14, 15:14, 15:12 and 15:14 were determined as the optimal ratio for alkali fusion of castor oil, methyl ricinoleate, sodium ricinoleate and ricinoleic acid, respectively. In addition, the optimal reaction time of alkali fusion of castor oil was 5 hours, and that of its derivatives was 3 hours. The maximum yield in sebacic acid of 68.8%, 77.7%, 80.1%, 78.6% can be obtained by using castor oil, methyl ricinoleate, sodium ricinoleate and ricinoleic acid as the raw material, respectively. High purity of sebacic acid was confirmed by GC and melting point analysis. ICP‐OES results illustrated that the content of Pb in sebcic acid was less than 1 mg kg⁻¹. Separating glycerol from castor oil was beneficial for alkali fusion, by which, the yield of sebacic acid was increased of approximately 10%, and the reaction time was reduced from 5 to 3 hours. This study provided guiding significance for the future industrial production of sebacic acid.

中文翻译：

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蓖麻油及其几种衍生物碱熔融制备癸二酸

以蓖麻油及其蓖麻油酸甲酯，蓖麻油酸钠和蓖麻油酸三种衍生物为​​原料，进行碱熔制备癸二酸。优化了反应条件，包括催化剂，油脂化学试剂/ NaOH的比例，反应时间和反应温度。发现Pb ₃ O ₄（1％）表现出最佳的催化性能，并且553 K被认为是最合适的反应温度。确定了15：14、15：14、15：12和15:14的油脂化学/ NaOH比分别是蓖麻油，蓖麻油酸甲酯，蓖麻油酸钠和蓖麻油酸碱熔的最佳比例。另外，蓖麻油碱熔的最佳反应时间为5小时，其衍生物的碱熔最佳反应时间为3小时。以蓖麻油，蓖麻油酸甲酯，蓖麻油酸钠和蓖麻油酸为原料，癸二酸的最大收率分别为68.8％，77.7％，80.1％，78.6％。通过GC和熔点分析证实了癸二酸的高纯度。ICP-OES结果表明，癸二酸中Pb的含量小于1 mg kg ^-1。从蓖麻油中分离甘油有利于碱融合，由此，癸二酸的产率提高了约10％，并且反应时间从5小时减少至3小时。该研究为癸二酸的未来工业生产提供了指导意义。