地沟油制生物柴油副产甘油精制  

Purification of glycerol from by-product of biodiesel preparaed from waste oil

作　　者：敖红伟[1] 王淑波[1] 潘媛媛[1] 廖克俭[1] 闫峰[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《石化技术与应用》2009年第3期226-228,共3页Petrochemical Technology & Application

摘　　要：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。Refining of by - product crude glycerol from producing biodiesel was conducted by complex formation separation of sodium oxalate. The results showed that the yield of crude glycerol was 81.2% when the by - product of biodiesel was neutralized to pH value 5 by adding 85% H3PO4 ,temperature was 70℃ , reaction time was 60 min. The impurity removal rate was 19.8% under the condition of mass fraction of sodium oxalate 0.03%, temperature 80℃,reaction time 30 min. The fraction of 164 - 200 ℃ was collected by vacuum distillation,the refining glycerol with purity 99.5% was obtained by active carbon decoloring.

关 键 词：生物柴油 甘油 草酸钠 分离 精制 

分 类 号：TQ645.5[化学工程—精细化工]