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| Separation of phosphatidylcholine from soybean phospholipids by simulated moving bed |
| LÜ Yu-bin, YANG Yi-wen, WU Ping-dong |
| National Laboratory of Secondary Resources Chemical Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract A simulated moving bed (SMB), equipped with eight silica-gel columns, was used to separate phosphatidylcholine (PC) from soybean phospholipids. The effects of flow rate in Sections 2 (Q2) and 3 (Q3), switching time, feed flow rate and feed concentration on the operating performance parameters: purity, recovery, productivity and desorbent consumption were studied. Operating conditions leading to more than 90% purity in both outlet streams have been identified, together with those achieving optimal performance. Regions leading to complete separation are observed and explained theoretically. As the mass-transfer effect was not considered, the triangle theory only gives initial guesses for the optimal operating conditions.
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Received: 27 September 2005
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