环氧棉籽油制备工艺优化及其下游产品研究Optimization of preparation process of epoxy cottonseed oil and its downstream products study

• Published in: Zhongguo you zhi Vol. 49; no. 8; pp. 92 - 96
• Main Author: 夏热帕提·吐孙1，阿地力·吾布力2，熊燕1,3 TUSUN Xiarepati1, WUBULI Adili2, XIONG Yan1,3
• Format: Journal Article
• Language: English
• Published: 中粮工科（西安）国际工程有限公司 01.08.2024
• Subjects: cottonseed oil; epoxidation; catalyst; emulsifier; cottonseed oil polyester; 棉籽油；环氧化；催化剂；乳化剂；棉籽油聚酯
• ISSN: 1003-7969
• DOI: 10.19902/j.cnki.zgyz.1003-7969.230163

旨在为环氧棉籽油的制备及其高附加值利用提供理论依据和技术支撑，分别采用无机强酸催化法和有机酸自催化法对棉籽油进行环氧化，考察了不同酸对环氧化反应的催化作用及乳化剂对环氧化工艺的影响。以环氧棉籽油为原料，采用开环一锅法制备羟基化棉籽油，并将其与己二酸发生酯化反应合成棉籽油聚酯，对产物进行了红外光谱和核磁共振氢谱表征。结果表明：无机酸中浓硫酸对棉籽油环氧化的催化效果最佳，其次是磷酸，有机酸中甲酸效果最优；乳化剂增加了油-水体系的均匀混合，可适当提高产品的环氧值，但需增加破乳工段；棉籽油聚酯中存在酯基，但仍有未酯化的羟基。综上，量化生产环氧棉籽油可优先考虑甲酸为催化剂，通过环氧棉籽油制备羟基化棉籽油，再与多元酸反应可制备棉籽油聚酯，但存在未酯化的羟基。In order to provide theoretical basis and technical support for the preparation and high value-added utilization of epoxy cottonseed oil,cottonseed oil was epoxidized by inorganic acid catalysis and organic acid autocatalysis. The catalytic effect of different acids on the epoxidation reaction and the influence of emulsifiers on the epoxidation process were investigated. Hydroxylated cottonseed oil was prepared using epoxy cottonseed oil as raw material by open-loop one pot synthesis method, and then esterified with adipic acid to synthesize cottonseed oil polyester. The product was characterized by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance. The results showed that concentrated sulfuric acid had the best catalytic effect on the epoxidation of cottonseed oil, followed by phosphoric acid in inorganic, and formic acid in organic acids had the best effect. Emulsifiers increased the uniform mixing of the oil-water reaction system and appropriately increased the epoxy value of the product. However, an additional step of demulsification was not suitable for quantitative production. Cottonseed oil polyester had ester groups, but still had unesterified hydroxyl groups. In conclusion, quantitative production of epoxy cottonseed oil can prioritize formic acid as a catalyst, and hydroxylated cottonseed oil prepared by epoxy cottonseed oil can react with polyacids to prepare cottonseed oil polyester, but there are still unesterified hydroxyl groups.