地沟油制生物柴油副产甘油精制

Petrochemical Technology & Application(2009)

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Abstract
采用草酸钠络合分离方法,对地沟油制生物柴油副产甘油的精制进行了研究。结果表明,加入85%磷酸调整体系pH值至5,反应温度为70℃,反应时间为60 min,粗甘油收率达到81.2%;草酸钠加入质量分数为0.03%,反应温度为80℃,混合时间为30 min,甘油的脱杂率达到19.8%。脱杂甘油经减压蒸馏收取164~200℃馏分,后经活性炭脱色得到纯度为99.5%的精制甘油。
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Key words
sodium oxalate,glycerol,separation,refining,biodiesel
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