Hydrocarbon fractionation by adsorbent membranes
    1.
    发明公开
    Hydrocarbon fractionation by adsorbent membranes 失效
    通过吸附膜进行烃分馏

    公开(公告)号:EP0636400A1

    公开(公告)日:1995-02-01

    申请号:EP94108718.1

    申请日:1994-06-07

    IPC分类号: B01D53/22

    CPC分类号: B01D53/229 B01D53/226

    摘要: A method is disclosed for separating a multicomponent gas mixture comprising at least three components into three product streams by means of adsorbent membrane zones operating in series. Each product is enriched in a different component based upon the relative strength of adsorption of each component on the adsorbent material. A non-permeate primary component product is obtained by the selective adsorption and permeation through the adsorbent membranes of secondary components which are more strongly adsorbed than the primary components in the gas mixture. Two or more permeate streams enriched in more the strongly adsorbed components are withdrawn from the membrane zones as individual secondary products, each of which contains a different component distribution determined by the relative strength of adsorption of the secondary components on the adsorbent material. Increased recovery and product purity are realized by the integration of pressure swing adsorption (PSA) and cryogenic separation systems with the adsorbent membrane zones. PSA reject gas is used as a membrane sweep gas to increase the permeation rates of secondary components.

    摘要翻译: 公开了一种通过串联运行的吸附膜区域将包含至少三种组分的多组分气体混合物分离成三种产物流的方法。 基于吸附材料上每种组分的相对吸附强度,每种产物都富含不同的组分。 通过选择性吸附和渗透吸附膜而获得非渗透的主要组分产物,其次要组分比气体混合物中的主要组分吸附得更强。 两个或更多富含更强吸附组分的渗透物流作为单独的次级产物从膜区域排出,每个次级产物含有不同的组分分布,其由次级组分吸附在吸附材料上的相对强度决定。 变压吸附(PSA)和深冷分离系统与吸附膜区域的结合实现了回收率和产品纯度的提高。 PSA废气被用作膜吹扫气体以增加次要组分的渗透速率。