用乳状液膜法分离浓缩L-苯丙氨酸

以煤油－Ｎ２０５－Ｐ２０４－ＨＣｌ组成的乳状液膜体系，在喷射提取柱内分别对Ｌ－苯丙氨酸及Ｌ－苯丙氨酸和Ｌ－天冬氨酸的混合溶液进行提取。实验结果表明，用１０００ｍＬ乳状液对初始浓度为２１．２５ｇ／Ｌ的单一Ｌ－苯丙氨酸水溶液提取３次后，外相浓度降到０．９５ｇ／Ｌ，内相最高浓度为１２６．１０ｇ／Ｌ；对Ｌ－苯丙氨酸浓度为８．６４ｇ／Ｌ的混合溶液提取两次后，外相Ｌ－苯丙氨酸浓度降至０．９０ｇ／Ｌ，内相Ｌ－苯

Separation and concentration of L-phenylalanine using emulsion liquid membrane

Extracting and concentrating L-phenylalanine(L-Phe)from aqueous solution containing L-Phe only and the mixture of L-Phe and L-aspartate(LAsp)were carried out in spurt extraction column,using emulsion liquid membrane system of kero-N205-P 204 -HCl.The experimental results show that the concentration of L-Phe in external and internal phase could reach 126.10 g/L and 0.95 g/L,respectively,after extractions for the initial L-Phe concentration of 21.25 g/L in the former case,and reach 60.0 g/L and 0.90 g/L respectively,for the initial L-Phe concentration of 8.64 g/L in the latter case,the presence of L-Asp did not affect extraction effciency of L-Phe,swelling was less than 26% after one time operation.The mechanism for why the spurt extraction column could minimize efficiently swelling was also discussed.