Recovering Ethanol Sidedraw By Separating Crude Product From Hydrogenation Process
    32.
    发明申请
    Recovering Ethanol Sidedraw By Separating Crude Product From Hydrogenation Process 有权
    通过将粗产物与氢化过程分开来回收乙醇

    公开(公告)号:US20120245396A1

    公开(公告)日:2012-09-27

    申请号:US13456651

    申请日:2012-04-26

    IPC分类号: C07C29/80

    摘要: A process for producing ethanol is disclosed, comprising the steps of hydrogenating acetic acid in a reactor in the presence of a catalyst to form a crude ethanol product, separating at least a portion of the crude ethanol product in a column into a first distillate comprising ethanol and a first residue comprising acetic acid and water, wherein a substantial portion of the water in the crude ethanol product that is fed to the column is removed in the first residue, and separating a portion of the ethanol mixture stream to the second distillation column to yield an ethanol product sidedraw, second residue comprising water and a second distillate comprising ethyl acetate. The water content of the ethanol product sidedraw may be further reduced to yield a stream having reduced water content.

    摘要翻译: 公开了一种生产乙醇的方法,包括在催化剂存在下在反应器中氢化乙酸以形成粗乙醇产物的步骤,将塔中的至少一部分粗乙醇产物分离成包含乙醇的第一馏出物 和包含乙酸和水的第一残余物,其中在第一残余物中除去进料到塔中的粗乙醇产物中的大部分水,并将一部分乙醇混合物物流分离成第二蒸馏塔至 产生乙醇产物,副产物,第二残余物包含水和包含乙酸乙酯的第二馏出物。 可以进一步降低乙醇产品侧面的水含量以产生具有降低的水含量的料流。

    Reducing acetals and/or esters during ethanol separation process
    38.
    发明授权
    Reducing acetals and/or esters during ethanol separation process 有权
    在乙醇分离过程中还原缩醛和/或酯

    公开(公告)号:US08481792B2

    公开(公告)日:2013-07-09

    申请号:US13197699

    申请日:2011-08-03

    IPC分类号: C07C29/149

    摘要: To reduce acetal and/or ester concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water, ethyl acetate and one or more acetals, such as diethyl acetal. The acetal and/or ester concentration may be reduced thus reducing the need to separate acetal and/or ester from the crude product.

    摘要翻译: 为了在一个或多个蒸馏塔中从粗产物中分离乙醇以减少乙缩醛和/或酯浓度,至少一个塔在更高的压力下运行以增加有利于缩醛水解的平衡常数。 粗产物可以包括乙醇,乙醛,水,乙酸乙酯和一种或多种缩醛,例如二乙基缩醛。 可以减少缩醛和/或酯浓度,因此减少了与粗产物分离缩醛和/或酯的需要。

    Process for Purifying a Crude Ethanol Product
    39.
    发明申请
    Process for Purifying a Crude Ethanol Product 失效
    纯化粗乙醇产物的方法

    公开(公告)号:US20130035516A1

    公开(公告)日:2013-02-07

    申请号:US13197748

    申请日:2011-08-03

    IPC分类号: C07C27/26 C07C29/90

    摘要: In one embodiment, the invention is to a process for purifying a crude ethanol product. The process comprises the step of hydrogenating acetic acid in a first reaction zone in the presence of a first catalyst to form the crude ethanol product comprising ethanol, acetaldehyde, acetic acid, water, and acetal. The process further comprises the step of separating at least a portion of the crude ethanol product into a refined ethanol stream and a by-product stream. The refined ethanol stream comprises ethanol and acetaldehyde; and the by-product stream comprises acetic acid and a substantial portion of the water from the crude ethanol product. The process further comprises the step of hydrolyzing in a second reaction zone at least a portion of the acetal.

    摘要翻译: 在一个实施方案中,本发明涉及纯化粗乙醇产物的方法。 该方法包括在第一催化剂存在下在第一反应区中氢化乙酸以形成包含乙醇,乙醛,乙酸,水和缩醛的粗乙醇产物的步骤。 该方法还包括将至少一部分粗乙醇产物分离成精制乙醇料流和副产物流的步骤。 精制乙醇流包含乙醇和乙醛; 并且副产物流包含乙酸和来自粗乙醇产物的大部分水。 该方法还包括在第二反应区中水解缩醛的至少一部分的步骤。

    Process for purifying a crude ethanol product
    40.
    发明授权
    Process for purifying a crude ethanol product 失效
    纯化粗乙醇产物的方法

    公开(公告)号:US08748676B2

    公开(公告)日:2014-06-10

    申请号:US13197748

    申请日:2011-08-03

    IPC分类号: C07C27/04

    摘要: In one embodiment, the invention is to a process for purifying a crude ethanol product. The process comprises the step of hydrogenating acetic acid in a first reaction zone in the presence of a first catalyst to form the crude ethanol product comprising ethanol, acetaldehyde, acetic acid, water, and acetal. The process further comprises the step of separating at least a portion of the crude ethanol product into a refined ethanol stream and a by-product stream. The refined ethanol stream comprises ethanol and acetaldehyde; and the by-product stream comprises acetic acid and a substantial portion of the water from the crude ethanol product. The process further comprises the step of hydrolyzing in a second reaction zone at least a portion of the acetal.

    摘要翻译: 在一个实施方案中,本发明涉及纯化粗乙醇产物的方法。 该方法包括在第一催化剂存在下在第一反应区中氢化乙酸以形成包含乙醇,乙醛,乙酸,水和缩醛的粗乙醇产物的步骤。 该方法还包括将至少一部分粗乙醇产物分离成精制乙醇料流和副产物流的步骤。 精制乙醇流包含乙醇和乙醛; 并且副产物流包含乙酸和来自粗乙醇产物的大部分水。 该方法还包括在第二反应区中水解缩醛的至少一部分的步骤。