采用络合萃取法从维生素B_(12)发酵废液中回收丙酸  

Recovery of Propionic Acid from the Waste Liquor in Vitamin B_(12) Fermentation by Complex Formation Extraction

作　　者：王金宇[1] 高文惠[1] 罗敏[1] 张华峰[1] 

机构地区：[1]河北科技大学生物科学与工程学院,河北石家庄050018

出　　处：《化工环保》2004年第5期358-361,共4页Environmental Protection of Chemical Industry

基　　金：河北省科技攻关课题(01276718D)

摘　　要：采用络合萃取法回收维生素B12发酵废液中的丙酸,确定了络合萃取的最佳工艺条件:以0.5 mol/L的磷酸三丁酯(TBP)为络合剂,油水比(体积比)为1:2,常温下萃取30 min。在最佳工艺条件下单级萃取率为56％左右,四级萃取率可达98％以上。络合萃取过程中使用的有机溶剂可反复使用,使成本大大降低。Propionic acid was recovered from the waste liquor in vitamin B12 fermentation by complex formation extraction. The optimal extraction conditions were determined as follows: 0.5 mol/L of tributyl phosphate (TBP)as complexing agent, 1:2 of volume ratio of organic phase to aqueous phase, room temperature and 30 minutes of extraction time. Under these conditions, the extraction yield of single - stage extraction is 56% and that of four - stage extraction is over 98 % . The organic solvent can be recycled, decreasing the extraction cost.

关 键 词：发酵 废液 丙酸 络合萃取 维生素B12 综合利用 

分 类 号：X703.1[环境科学与工程—环境工程]