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《中国化学工程学报(英文版)》 2012-04
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Separation of α-Tocopherol with a Two-Feed Simulated Moving Bed

WEI Feng**,SHEN Bo,CHEN Mingjie,ZHOU Xianbo and ZHAO Yingxian Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China  
A two-feed simulated moving bed(SMB) was proposed to utilize the stationary phase more effectively.Zone I is disconnected with zone II and zone III is disconnected with zone IV.Two feeds are added to zones I and III,while two desorbents are added to zones II and IV separately.The investigation on the movement of concentra-tion bands indicated that the tail of the strong retained solute and the front of the weak retained solute were eluted from zones I and III orderly,so the streams from zones I and III could be cut into different fractions to give the products with high purity.The two-feed SMB was used to separate α-tocopherol from its homologue mixture suc-cessfully,and could double the productivity if both feeds were identical to the feed in the conventional four-zone SMB.The solvent consumption could be reduced by reusing the middle fraction without solutes.
【Fund】: Supported by the Natural Science Foundation of Ningbo China (2009A610153);; Analysis & Measurement Foundation ofZhejiang (2009F70066);; Education Bureau of Ningbo China (Jd090222)
【CateGory Index】: TQ466.5
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