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��ѧ��ҵ�빤�� 2004, Vol. 21 Issue (1) :25-28    DOI:
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The Study on Refining ��-Linolenic Acid by Molecular Distillation
ZHENG Tao, XU Song-lin��(National Engineering Research Center for Distillation Technology,Tianjin University,Tianjin 300072,China)����
(National Engineering Research Center for Distillation Technology,Tianjin University,Tianjin 300072,China)��
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Abstract�� The technology of refining ������-linolenic acid by wiped film molecular distillation has been studied.The effect of the operating parameters,such as:the distillation temperature,the system pressure,the feed rate,and the agitating speed were studied on the purity and yield of ������-linolenic acid.The experiment is carried out by multistage molecular distillation.The appropriate process condition for the purification of ������-linolenic by molecular distillation is:distillation temperature 90�桫105��,system pressure 0��3Pa��1��8Pa,feed temperature 60��,feed rate 90mL/h��100mL/h,and agitating speed 150r/min.The purity of ������-linolenic can be purified from 67��5% to 82��3% by 4 stages molecular distillation.����
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Received 2004-01-15; published 2004-01-15
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֣�|,������.���������ᴿ��-��������о�[J].  ��ѧ��ҵ�빤��, 2004,21(1): 25-28
ZHENG Tao, XU Song-lin��.The Study on Refining ��-Linolenic Acid by Molecular Distillation[J].  Chemcial Industry and Engineering, 2004,21(1): 25-28
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