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    Process for preparing alkyl ethers
    9.
    发明授权
    Process for preparing alkyl ethers 失效
    制备烷基醚的方法

    公开(公告)号：US5536886A

    公开(公告)日：1996-07-16

    申请号：US305920

    申请日：1994-09-16

    申请人： Esa Tamminen ,  Juhani Aittamaa ,  Juha Jakkula

    发明人： Esa Tamminen ,  Juhani Aittamaa ,  Juha Jakkula

    IPC分类号： B01J31/10 ,  B01D3/00 ,  C07B61/00 ,  C07C41/06 ,  C07C41/42 ,  C07C43/04

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

    摘要： The invention relates to a process for preparing tertiary alkyl ethers. According to the process the feedstock containing hydrocarbons is fed to a catalytic distillation reactor system, in which the isoolefines, in particular the C.sub.4 to C.sub.7 isoolefines, of the feed are reacted with an alkanol in the presence of a cation exchange resin in order to produce tertiary alkyl ether products. The reaction product containing the ethers is removed from the distillation system as the bottoms product and, if necessary, it is subjected to an additional treatment for producing a gasoline component. The unreacted alkanol is removed as the overhead product of the distillation. According to the invention, the distillate withdrawn mainly contains an azeotrope of C.sub.4 hydrocarbons and alkanol, the C.sub.4 amount of which at least approximately corresponds to the C.sub.4 hydrocarbon concentration of the hydrocarbon feed, a substantial amount of the unreacted alkanol being removed in the form of said azeotrope. By means of the invention the need for a separate alkanol washing unit is eliminated in the apparatus which considerably reduces apparatus investment costs.

    摘要翻译： 本发明涉及一种制备叔烷基醚的方法。 根据该方法，将含有烃的原料进料到催化蒸馏反应器系统中，其中进料的异烯烃，特别是C4至C7异烯烃在阳离子交换树脂的存在下与烷醇反应，以产生 叔烷基醚产物。 含有醚的反应产物作为塔底产物从蒸馏系统中除去，如果需要，将其进行额外处理以生产汽油组分。 将未反应的链烷醇作为蒸馏塔顶产物除去。 根据本发明，取出的馏出物主要含有C 4烃和链烷醇的共沸物，其C4量至少近似对应于烃进料的C 4烃浓度，大量未反应的链烷醇以 说共沸物。 通过本发明，在装置中消除了对单独的烷醇洗涤单元的需求，这大大降低了设备的投资成本。