超临界CO_2条件下大豆油极度氢化的研究  

Studies on the Fully Hydrogenated Soybean Oil in Supercritical CO_2 Conditions

作　　者：于殿宇[1] 齐晓芬 张如春[1] 姜洋[1] 刘天一[1] 

机构地区：[1]东北农业大学,哈尔滨150030

出　　处：《中国食品学报》2016年第12期162-168,共7页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(31271886);十三五攻关课题:大豆油绿色制造关键技术及大型智能化装备研发与示范(2016YFD0401402)

摘　　要：以机榨大豆油为原料,在超临界CO_2体系中,选取Pd/C作为催化剂催化极度氢化反应,通过单因素试验,确定催化剂添加量、氢气压力、反应时间、反应温度及搅拌速度的最适量。在最优条件下制备出极度氢化大豆油的碘值为2.6 gI_2/100 g,反式脂肪酸含量为0.23%(可看作零反式脂肪酸含量),VE含量186.7 mg/kg。与常规极度氢化反应相比,反应温度降低了70℃,反应时间缩短了60 min,提高了极度氢化油的质量。Pd/C催化剂可回收重复使用6次,降低了生产成本。Mechanical extracted soybean oil was used as raw materials, fully hydrogenated was catalyzed by Pd/C in supercritical CO_2 conditions. The optimum conditions were determined by single factor tests, such as he addition amount of catalyst, hydrogen pressure, reaction time, reaction temperature and stirring speed. The iodine value of the fully hydrogenated soybean oil was of 2.6 gI_2/100 g. The content of trans fatty acids was of 0.23% at the optimal conditions, it can be regarded as the content of trans fatty acids was zero. The content of VE was 186.7 mg/kg. Compared with conventional fully hydrogenation, the best reaction time of fully hydrogenated soybean oil in supercritical CO_2 conditions shortened 60 min, the best reaction temperature reduced 70 ℃, and the quality of fully hydrogenated soybean oil was improved. Pd/C can reused 6 times, the cost of production was reduced.

关 键 词：超临界CO2 机榨大豆油 极度氢化 碘值 

分 类 号：TS225.13[轻工技术与工程—粮食、油脂及植物蛋白工程]