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    Process for preparation of ethers in a catalytic distillation column
    4.
    发明授权
    Process for preparation of ethers in a catalytic distillation column 有权
    在催化蒸馏塔中制备醚的方法

    公开(公告)号：US06262314B1

    公开(公告)日：2001-07-17

    申请号：US09286722

    申请日：1999-04-06

    申请人： Leonardo Escalante ,  Jose Castor Gonzalez ,  Zaida Hernandez

    发明人： Leonardo Escalante ,  Jose Castor Gonzalez ,  Zaida Hernandez

    IPC分类号： C07C4101

    CPC分类号： B01D3/009 ,  C07C41/06 ,  C07C41/42 ,  Y02P20/127 ,  Y10S203/06 ,  C07C43/046

    摘要： A process for preparing ethers includes the steps of: providing a feedstock containing iso-olefins selected from the group consisting of C5 iso-olefins, C6 iso-olefins and mixtures thereof; mixing the feedstock with alkyl alcohol so as to provide a reaction feedstock, feeding the reaction feedstock to a reactor zone in the presence of a first etherification catalyst whereby the alkyl alcohol reacts with the iso-olefins to form alkyl-tert-alkyl ethers so as to provide an intermediate feedstock containing the ethers and unreacted iso-olefins and alkyl alcohol; feeding the intermediate feedstock to a catalytic distillation column having a second etherification catalyst defining a catalytic zone; mixing additional alkyl alcohol to the intermediate feedstock so as to form azeotropes of the alkyl alcohol with the unreacted iso-olefins without forming azeotropes of the alkyl alcohol with the ethers whereby the catalytic zone is substantially free of the ethers and the unreacted iso-olefins react with said alkyl alcohol in the catalytic zone to form additional alkyl-tert-alkyl ethers.

    摘要翻译： 制备醚的方法包括以下步骤：提供含有选自C5异烯烃，C6异烯烃及其混合物的异烯烃的原料; 将原料与烷基醇混合以提供反应原料，在第一醚化催化剂存在下将反应原料进料到反应器区域，由此烷基醇与异烯烃反应形成烷基 - 叔烷基醚，以便 提供含有醚和未反应的异烯烃和烷基醇的中间原料; 将中间原料进料到具有限定催化区的第二醚化催化剂的催化蒸馏塔; 将另外的烷基醇混合到中间体原料中，以便与未反应的异烯烃形成烷基醇的共沸物，而不形成烷基醇与醚的共沸物，由此催化区基本上不含醚，未反应的异烯烃反应 所述烷基醇在催化区中形成另外的烷基 - 叔烷基醚。

    Nitrile selective removal process
    5.
    发明授权
    Nitrile selective removal process 有权
    腈选择性去除过程

    公开(公告)号：US6019887A

    公开(公告)日：2000-02-01

    申请号：US195856

    申请日：1998-11-19

    申请人： Maria M. Ramirez de Agudelo ,  Julia T. Guerra ,  Douglaines L Marcano ,  Zaida Hernandez

    发明人： Maria M. Ramirez de Agudelo ,  Julia T. Guerra ,  Douglaines L Marcano ,  Zaida Hernandez

    IPC分类号： B01D15/00 ,  B01J20/18 ,  B01J20/34 ,  C07C7/12 ,  C10G25/00 ,  C10G25/03 ,  C10G25/05 ,  C10G25/12

    CPC分类号： C07C253/34 ,  B01D15/00 ,  B01J20/183 ,  C10G25/05

    摘要： An adsorption/desorption process for selectively removing nitriles from a hydrocarbon feedstock includes the steps of: (a) providing a hydrocarbon feedstock having a nitrile content of less than or equal to about 400 ppm; (b) providing an adsorbent for selective removal of nitrile from a hydrocarbon feedstock comprising a substantially homogeneous mixture of a cationic nonacidic zeolite and an inorganic oxide matrix, the zeolite having an accessibility index of between about 0.1 to about 0.4; (c) contacting the feedstock and the adsorbent at nitrile adsorption conditions whereby at least about 80% of the nitrile content is adsorbed by the adsorbent during contact with at least about 200 volumes of the feedstock per volume of the adsorbent so as to provide a used adsorbent having nitrile molecules adsorbed thereon; and (d) contacting the used adsorbent with a desorbent at desorption conditions so as to remove the nitrile molecules and provide a renewed adsorbent.

    摘要翻译： 用于从烃原料中选择性除去腈的吸附/解吸方法包括以下步骤：（a）提供腈含量小于或等于约400ppm的烃原料; （b）提供用于从包含阳离子非酸性沸石和无机氧化物基质的基本均匀的混合物的烃原料中选择性除去腈的吸附剂，所述沸石的可接近指数为约0.1至约0.4; （c）在腈吸附条件下使原料和吸附剂接触，由此至少约80％的腈含量在与至少约200体积的原料/体积的吸附剂接触期间被吸附剂吸附，从而提供使用过的 吸附有腈分子的吸附剂; 和（d）在脱附条件下使用的吸附剂与解吸剂接触，以除去腈分子并提供更新的吸附剂。