【摘要】 对乳化液膜技术分离丙氨酸进行了实验研究,从而探索了从味精生产过程的“第二次等电点结晶母液”中回收丙氨酸的新途径。采用二-(2-乙基己基)磷酸为载体和表面活性剂失水山梨醇单油酸酯、磺化煤油组成液膜体系。研究了影响乳化液膜提取的各种因素,确定了适宜的分离条件。丙氨酸的单级提取率超过60％,浓缩3倍以上。对该液膜体系在交流高压静电场作用下,箱式破乳器的破乳过程,建立了破乳速率和相关操作因素间的定量关系。更多还原

【Abstract】 The separation of alanine by emulsion liquid membranes in laboratory scale is studied, thus explores a new way for recovery of alanine from the "secondary isoelectric point crystallization" mother liquid in the production process of gourmet powder. D2EHPA, Span 80 and Sulphonating-kerosene are used as carrier , surfactant and diluent, resppectively, to compose the liquid membrane system. The affecting factors of ELM extraction are inverstigated and some suitable separation conditions are established. The extraction of alanine in one batch stage is over 60% and alanine is concentrated over 3 times. The demulsification process in high electrostatic field with box install is researched and the functional relation between the demulsification rate and the related operating factors is obtained.更多还原