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    • 2. 发明授权
    • Chromatographic simulated mobile bed separation process with dead volume
correction using an increase in flow rate
    • 色谱模拟移动床分离过程与死体积校正使用流量增加
    • US5582736A
    • 1996-12-10
    • US494562
    • 1995-06-22
    • Gerard HotierChoua CohenNicolas CouenneJean-Michel Toussaint
    • Gerard HotierChoua CohenNicolas CouenneJean-Michel Toussaint
    • G01N30/00B01D15/08B01D15/18G01N30/02G01N30/44G01N30/88
    • B01D15/1828B01D15/40B01D2215/025
    • In a simulated mobile bed separation process, perturbations are corrected in the compositions of an extract (EA) or raffinate (RB) due to the dead volume introduced by at least one recycling pump (P) or compressor for a liquid, supercritical or gaseous mixture in a closed circuit of columns. The process is characterized in that each time an extract extraction stream (EA) or that of the raffinate (RB) passes from a position immediately anterior to a position immediately posterior to each of the dead volumes in the circuit, the flow rate of the flow rate regulated recycling pump or compressor is increased for the time which the extract or raffinate remains in the position immediately posterior to the dead volume When the extract or raffinate extraction stream passes from the immediately posterior position to the dead volume to the following position, the flow rate of the recycling pump or compressor is reduced so that the flow rate regains the value which would have been applied if the dead volume had been ignored.The invention is applicable to the separation of aromatic hydrocarbons containing 8 carbon atoms.
    • 在模拟的移动床分离过程中,由于由用于液体,超临界或气体混合物的至少一个循环泵(P)或压缩机引入的死体积,在萃取物(EA)或萃余液(RB)的组成中校正扰动 在列的闭路中。 该方法的特征在于,每次提取物萃取流(EA)或萃余液(RB)的每一次从紧邻回路中每个死体积的位置之前的位置通过时,流量的流速 提取液或提余液保留在死体积之后的位置的时间内增加了速率调节回收泵或压缩机。当提取物或萃余液萃取物流从紧邻后位置传递至死体积至下一位置时,流量 回收泵或压缩机的速率降低,使得流量恢复如果死体积被忽略的将被应用的值。 本发明适用于分离含有8个碳原子的芳烃。