Abstract: The rice bran wax was firstly extracted by solvent from rice bran, and triacontanol was thenextracted after refining. The extraction conditions were determined through the investigation of solvent type, extraction temperature, time and other factors. After refining, the optimum conditions for extracting triacontanol were determined, and the corresponding products were characterized by infrared spectroscopy. The experimental results show that the yield of crude rice bran wax is 1.0%~1.5% under the conditions of isobutanol as extractant, isobutanol/rice bran mass fraction ratio of 10, extraction temperature of 105 ℃ and extraction time of 5 h. In addition, the yield of refined rice bran wax is 3.1% under the conditions of saponification temperature 55 ℃, reaction time 8 h, sodium hydroxide concentration 3 mol/L and ethanol calcium chloride as extraction solution. The infrared spectrum analysis indicated that the melting point of the product is 85.0~86.5 ℃.

Key words: Rice bran wax, Extraction, Rtriacontanol

摘要： 以米糠为原料，溶剂萃取米糠蜡，精制后提取三十烷醇。考察溶剂、萃取温度、反应时间等因素对反应的影响，确定萃取条件；精制后，确定提取三十烷醇的最佳条件，并利用红外光谱对产物进行表征。结果表明，在异丁醇为萃取剂、异丁醇与米糠质量比为10、萃取温度为105 ℃、萃取时间为5 h的条件下，米糠蜡收率为1.0%~1.5%；精制后米糠蜡采用乙醇皂化，在皂化温度为55 ℃、反应时间为8 h、氢氧化钠浓度为3 mol/L、乙醇⁃氯化钙为提取液的条件下，三十烷醇收率为3.1%；红外谱图分析表明三十烷醇被提取，产品熔点为85.0~86.5 ℃。

关键词: 米糠蜡, 萃取, 三十烷醇