摘要
利用络合萃取法对模拟溶液和发酵液中的丙酸分离进行研究。络合剂、稀释剂筛选结果表明:选用甲基三辛基氯化胺(MTAC)为络合剂、正辛醇为稀释剂时,萃取受pH值和无机阴离子影响较小,对丙酸具有较高的选择性。以1.2mol/L的MTAC为萃取有机相,有机相/水相(体积比)为3的条件下,萃取15min即能达到平衡;该系统适用于较高浓度丙酸发酵液萃取,经4级萃取丙酸萃取率达86.2%。
Extraction of propionic acid by chemical complexation was investigated from simulation solution and fermentation broth.Methyl trioctyl-ammonium chloride（MTAC）diluted with octanol was used for the extraction,which had a higher selectivity for propionic acid over other organic acids and was less affected by pH and inorganic anions.The extraction equilibrium could be reached in 15 min when 1.2 mol/L of MTAC was applied with an extraction phase ratio of 3∶1（organic phase to water phase）.This system was believed to be adaptable for the extraction of propionic acid with high concentration.Over four-stage extraction,86.2% of propionic acid could be extracted.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第5期812-816,共5页
Chemical Industry and Engineering Progress
基金
国家973计划(2007CB714304)
江苏省博士后基金(0901011C)
江苏省普通高校研究生科技创新计划(CX08B-113Z)
南京工业大学学科基金项目
关键词
丙酸
络合萃取
甲基三辛基氯化胺
propionic acid
complex extraction
methyl trioctyl-ammonium chloride
