密差分相式液膜法提取L-苯丙氨酸

Extraction of L-phenylalanine using gravity separation phase liquid membrane

采用密差分相液膜分离技术 ,以P2 0 4 为载体 ,H2 SO4 为反萃剂 ,以初始浓度 15 .2 8g/L的L -苯丙氨酸水溶液提取 5次后 ,浓度降至 1 92 g/L ,反萃相中L -苯丙氨酸浓度达 5 4 35g/L ,膜溶胀和破裂均较小 ,过程不需要制乳和破乳 ;对反萃剂也进行了后处理 .

Both extraction and concentration of L-phenylalanine(L-phe) were carried out using gravity separation phase liquid membrane(GSPLM) with P 204 as carrier and H 2SO 4 as stripping agent. The concentration of L-phe in extraction raffinate and stripped solution could reach 1.92 g·L -1 and 54.35 g·L -1,respectively,after the fifth time extraction for the initial L-phe concentration of 15.28 g·L -1.Swelling and breakage of GSPLM were lower than emulsion liquid membrane(ELM).Emulsification and demulsification could be eliminated too. The post treatment of stripped solution was also carried out.