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    • 30. 发明授权
    • Process and apparatus for efficient recovery of dichlorohydrins
    • 用于有效回收二氯代醇的方法和装置
    • US08471077B2
    • 2013-06-25
    • US12935299
    • 2009-03-18
    • Anil Mehta
    • Anil Mehta
    • C07C29/80C07C27/28
    • B01J19/00B01D3/143C07C29/82C07C31/42
    • A process and apparatus is disclosed for recovering dichlorohydrins from a hydrochlorination reactor effluent stream comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts. The reactor effluent stream is distilled to produce a dichlorohydrin-rich vapor phase effluent stream. The dichlorohydrin-rich vapor phase effluent stream is cooled and condensed in two unit operations conducted at two different temperatures and a portion of the liquid phase effluent stream produced by the first unit operation is recycled to the distillation step for reflux. Product streams produced by the process and apparatus are suitable for further processing in a further unit operation, such as dehydrochlorination. Advantages include recovery of high purity dichlorohydrins, more efficient recovery of dichlorohydrins, and reduced capital investment in the recovery equipment.
    • 公开了一种从含有二氯代醇的氢氯化反应器流出物流中回收二氯代醇的方法和装置,一种或多种选自二氯代醇,一氯醇和/或其酯的酯,以及多羟基化脂族烃化合物和/或其酯,以及任选的一种 或更多的含有水,氯化剂,催化剂和/或催化剂酯的物质。 将反应器流出物流蒸馏以产生富含二氯丙醇的气相流出物流。 将富含二氯丙醇的气相流出物流在两个不同温度下进行两个单元操作冷却和冷凝,并将通过第一单元操作产生的一部分液相流出物流循环至蒸馏步骤进行回流。 由该方法和装置产生的产物流适用于另外的单元操作如脱氯化氢中的进一步处理。 优点包括回收高纯度二氯丙醇,更有效地回收二氯丙醇,并减少回收设备的资本投入。