中国炼油与石油化工 ›› 2013, Vol. 15 ›› Issue (1): 48-53.

• Scientific Research • 上一篇    下一篇

正交实验法优化地沟油制生物柴油产物粗甘油的提纯

蔡天凤1,李会鹏2,赵华1,廖克俭2   

  1. 1. 辽宁石油化工大学
    2. 辽宁石油化工大学石油化工学院
  • 收稿日期:2012-07-20 修回日期:2012-08-08 出版日期:2013-03-30 发布日期:2013-03-30
  • 通讯作者: 李会鹏 E-mail:fslhp@sina.com
  • 作者简介:
  • 基金资助:
    辽宁省博士启动资金

Purification of Crude Glycerol from Waste Cooking Oil Based Biodiesel Production by Orthogonal Test Method

  • Received:2012-07-20 Revised:2012-08-08 Online:2013-03-30 Published:2013-03-30

摘要: 利用化学-物理方法进行地沟油制生物柴油副产物粗甘油的提纯,首先在70℃用85%的H3 PO4循环酸化至PH值为5,然后进行相分离收集富甘油中间相,粗甘油的收率可达81.2%。用0.03 %( w/w)草酸钠在80℃络合反应30分钟,脱杂率可达19.8%,减压蒸馏收集164 -200℃的馏分,然后用2%活性炭在 80℃脱色两次,甘油收率可达98.10%。

关键词: 粗甘油, 甲酸钠, 生物柴油, 提纯, 富甘油层

Abstract: Purification of original crude glycerol from by-product of biodiesel was conducted on a laboratory scale by using the combined chemical and physical treatments based upon repeated cycles of acidification to the desired pH of 5 using 85% H3 PO4 at 70℃ for 60 min, allowing phase separation and harvesting of the glycerol-rich middle phase. The yield of crude glycerol reached 81.2%. Subsequently, the complex reaction of the harvested glycerol phase occurred by adding 0.03 %( w/w) of sodium oxalate at 80℃ for 30min with the impurity removal rate of 19.8%. The fraction between 164 and 200℃ was collected by vacuum distillation followed by decolorization with 2% of active carbon at 80℃ twice at an acceptable purity of 98.10% (w/w) glycerol.

Key words: Crude glycerol, Sodium oxalate, Biodiesel, Purification, Glycerol-rich layer