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    • 4. 发明专利
    • Method for dehydrating ethanol
    • 乙醇脱水方法
    • JP2007197447A
    • 2007-08-09
    • JP2007015412
    • 2007-01-25
    • Oxeno Olefinchemie Gmbhオクセノ オレフィンヒェミー ゲゼルシャフト ミット ベシュレンクテル ハフツングOXENO Olefinchemie GmbH
    • RIX ARMINHOEPER FRANKPRAEFKE JOCHENBUESCHKEN WILFRIED
    • C07C29/76C07C31/08
    • B01D61/362B01D2317/022B01D2317/027B01D2317/04C07C29/76C07C41/06C07C31/08C07C43/046
    • PROBLEM TO BE SOLVED: To provide a method for dehydrating ethanol, capable of dehydrating ethanol by a lower investment cost and operation cost than those in conventional technologies. SOLUTION: This method for producing ethanol containing less water content by its dehydration by using a membrane from at least 2 flows of ethanol having different water contents and much water contents comprises the steps of: introducing the ethanol flows having different water contents separately into different membrane units; separating, during the above process, the ethanol flow to the ethanol having a small water content as concentrated liquid and permeated liquid having much water content each time; and uniting the concentrated liquid flows from at least one membrane unit for separating the ethanol flow having a high water content, with a feeding flow and/or at least one of different concentrated liquid flows of at least one different membrane unit for separating the ethanol flow, wherein only the flows having the difference of absolute ethanol concentration by a maximum of 1 mass% are united. COPYRIGHT: (C)2007,JPO&INPIT
    • 待解决的问题:提供一种脱水乙醇的方法,其能够以比传统技术更低的投资成本和操作成本使乙醇脱水。 解决方案:通过使用来自至少2个具有不同含水量和大量水分含量的乙醇流动的膜,通过脱水制备含水量较少的乙醇的方法包括以下步骤:分别引入具有不同含水量的乙醇流 进入不同的膜单位; 在上述过程中,将乙醇流向具有小水含量的乙醇作为浓缩液体,并且每次具有大量水含量的渗透液体; 以及将来自至少一个膜单元的浓缩液流与至少一个不同的膜单元的进料流和/或至少一种不同的浓缩液体流分离乙醇流分离乙醇流, 其中,仅将绝对乙醇浓度差异最大为1质量%的流量合并。 版权所有(C)2007,JPO&INPIT