Yu Siyuan, Cui Jianlan, Zhong Congshan, Meng Jian, Xue Tianyi
School of Chemical Engineering and Technology and Software School, North University of China, Taiyuan 030051, Shanxi, China.
ACS Omega. 2019 Apr 11;4(4):6697-6702. doi: 10.1021/acsomega.9b00577. eCollection 2019 Apr 30.
A green and environmentally friendly route of no thinning agent was designed to prepare sebacic acid. Sodium ricinoleate was selected as the raw material to carry out solid-phase cleavage in a tubular furnace. The reaction parameters including catalyst, ratio of sodium ricinoleate/KOH, reaction time, reaction temperature, and absolute pressure were optimized to obtain a high yield of sebacic acid. A satisfactory yield (70.2%) of sebacic acid was received in the presence of 1% catalyst (FeO) by weight (w/w), with 5:4 (w/w) ratio of sodium ricinoleate/KOH at 543 K under the absolute pressure of 0.09 MPa in 60 min. Sebacic acid was identified by gas chromatography analysis, and the purity (98.1%) of the product was further assessed by its melting point (306.3 K). Alkaline enhancement generates a better cracking effect. The yield of sebacic acid can be improved by a certain absolute pressure as a result of avoiding oxidation of sodium ricinoleate as well as reducing the residence time of hydrogen.
设计了一种无稀释剂的绿色环保路线来制备癸二酸。选择蓖麻油酸钠作为原料，在管式炉中进行固相裂解。对催化剂、蓖麻油酸钠与氢氧化钾的比例、反应时间、反应温度和绝对压力等反应参数进行了优化，以获得高产率的癸二酸。在1%（重量比，w/w）的催化剂（FeO）存在下，蓖麻油酸钠与氢氧化钾的比例为5:4（w/w），在543K、绝对压力0.09MPa的条件下反应60分钟，癸二酸的产率达到了令人满意的70.2%。通过气相色谱分析对癸二酸进行了鉴定，并通过其熔点（306.3K）进一步评估了产物的纯度（98.1%）。碱性增强会产生更好的裂解效果。由于避免了蓖麻油酸钠的氧化以及减少了氢气的停留时间，一定的绝对压力可以提高癸二酸的产率。
