Process for producing ethanol
    1.
    发明授权
    Process for producing ethanol 有权
    生产乙醇的方法

    公开(公告)号:US08211679B2

    公开(公告)日:2012-07-03

    申请号:US12036859

    申请日:2008-02-25

    IPC分类号: C12P7/14

    摘要: Ethanol and other liquid products produced by contacting carbon monoxide (CO) and/or a mixture of CO2 (carbon dioxide) and H2 (hydrogen) with a microorganism in a bioreactor are separated using a combination of distillation and vapor permeation membranes. The bioreactor passes an effluent with an ethanol concentration of 1 to 6 wt % to a distillation column that produces an overhead vapor stream enriched in ethanol. A series of vapor permeation membranes retain ethanol as retentate and produce a 99 wt % or higher ethanol product. Ethanol depleted permeate streams flow back to the column and the bioreactor. Coupling a bioreactor with distillation and pervaporation efficiently and economically separates ethanol when present at low concentration in an aqueous fermentation broth. The separation arrangement may also include a flash zone ahead of the distillation column to raise the concentration of the ethanol in the input stream to the distillation column.

    摘要翻译: 使用蒸馏和蒸气渗透膜的组合分离通过使生物反应器中的一氧化碳(CO)和/或CO 2(二氧化碳)和H 2(氢)的混合物与微生物接触而产生的乙醇和其它液体产物。 生物反应器将乙醇浓度为1至6重量%的流出物通过蒸馏塔,蒸馏塔产生富含乙醇的塔顶蒸气流。 一系列蒸汽渗透膜将乙醇作为保留物保留,并产生99重量%或更高的乙醇产物。 乙醇贫化的渗透物流流回塔和生物反应器。 在含水发酵液中以低浓度存在时,使生物反应器与蒸馏和渗透蒸发有效并经济地分离乙醇。 分离装置还可以包括在蒸馏塔之前的闪蒸区域,以将输入流中的乙醇浓度提高到蒸馏塔。