Multi-stage membrane separation process
    21.
    发明授权
    Multi-stage membrane separation process 有权
    多级膜分离过程

    公开(公告)号:US08419828B2

    公开(公告)日:2013-04-16

    申请号:US12811793

    申请日:2009-01-07

    IPC分类号: B01D53/22

    摘要: The invention concerns a process for the removal of gaseous acidic contaminants, especially carbon dioxide and/or hydrogen sulphide, in two or more stages from a gaseous hydrocarbonaceous feedstream (1) comprising hydrocarbons and said acidic contaminants, using one or more membranes in each separation stages. The gaseous hydrocarbonaceous feedstream is especially a natural gas stream. The process is especially suitable for feedstreams comprising very high amounts of acidic contaminants, especially carbon dioxide, e.g. more than 25 vol. %, or even more than 45 vol. %. In a first stage (2) a pure or almost pure stream of acidic contaminants is separated from the feedstream, the acidic contaminants (4) stream suitably containing less than 5 vol % of hydrocarbons. The remaining stream (3) comprises the hydrocarbons and still a certain amount of gaseous acidic contaminants. In a second stage (5) a pure or almost pure stream of hydrocarbons (8) is separated from the remaining stream, where after the then remaining stream (6) is combined with the feed for the first stage (1), the hydrocarbon stream suitably containing less than 5 vol % of acidic contaminants.

    摘要翻译: 本发明涉及一种从包含烃和所述酸性污染物的气态烃类进料流(1)在两个或多个阶段中除去气态酸性污染物,特别是二氧化碳和/或硫化氢的方法,其中在每个分离中使用一个或多个膜 阶段 气态烃类进料流特别是天然气流。 该方法特别适合于包含非常高量的酸性污染物,特别是二氧化碳的进料流,例如二氧化碳。 超过25卷 %,甚至超过45体积。 %。 在第一阶段(2),纯净或几乎纯净的酸性污染物流与进料流分离,酸性污染物(4)流适当地含有少于5体积%的烃。 剩余的流(3)包含烃和仍然一定量的气态酸性污染物。 在第二阶段(5)中,将纯的或几乎纯的烃类物流(8)与剩余物流分离,其中当然后的剩余物流(6)与第一级(1)的进料相结合时,烃流 适当地含有少于5体积%的酸性污染物。

    Extraction of metal residues from polymer cements
    26.
    发明授权
    Extraction of metal residues from polymer cements 失效
    从聚合物水泥中提取金属残留物

    公开(公告)号:US6153727A

    公开(公告)日:2000-11-28

    申请号:US135725

    申请日:1998-08-18

    IPC分类号: C08F6/02 C08F6/00

    CPC分类号: C08F6/02

    摘要: There is provided a method of removing metal residues from a polymer cement, the method comprising polymerizing a monomer with a metal-based polymerization initiator to give a polymer cement having metal polymerization initiator residue; adding an organic-soluble acid having a pKa no greater than about 4.5 to the polymer cement, thereby forming an acid containing organic phase; mixing the organic phase with an aqueous phase containing a mineral acid; and recovering the polymer cement substantially free of metal residue.

    摘要翻译: 提供了从聚合物水泥中除去金属残留物的方法,该方法包括用金属基聚合引发剂使单体聚合,得到具有金属聚合引发剂残基的聚合物粘合剂; 向聚合物胶浆中加入pKa不大于约4.5的有机溶解酸,从而形成含酸的有机相; 将有机相与含有无机酸的水相混合; 并回收基本上不含金属残渣的聚合物胶浆。

    Removal of lithium from polymer cements
    27.
    发明授权
    Removal of lithium from polymer cements 失效
    从聚合物水泥中去除锂

    公开(公告)号:US5767207A

    公开(公告)日:1998-06-16

    申请号:US652084

    申请日:1996-05-23

    IPC分类号: C08C2/04 C08F6/02 C08F297/02

    CPC分类号: C08C2/04 C08F297/02 C08F6/02

    摘要: A process for preparing a polymer cement which is relatively free of alkali metal salt by preparing the polymer cement with a polymerization terminating agent which is a diketone which leaves alkali metal salt in the cement which is readily removable by centrifugation.

    摘要翻译: 一种制备聚合物胶浆的方法,该聚合物胶浆通过制备具有聚合终止剂的聚合物粘合剂来制备聚合物粘合剂,所述聚合终止剂是在水泥中留下碱金属盐的二酮,其可通过离心容易地除去。

    Removal of nickel catalyst from polymer solutions by water addition and
centrifugation
    28.
    依法登记的发明
    Removal of nickel catalyst from polymer solutions by water addition and centrifugation 失效
    通过水添加和离心从聚合物溶液中去除镍催化剂

    公开(公告)号:USH1303H

    公开(公告)日:1994-04-05

    申请号:US527970

    申请日:1990-05-24

    IPC分类号: C08C2/04 C08F6/02 C08F6/08

    CPC分类号: C08F6/02 C08C2/04

    摘要: A process is provided comprising the steps of contacting a Group VIII metal hydrogenation catalyst residue containing polymer solution with from about 2 to about 50 parts by weight water based on 100 parts by weight of polymer solution, centrifuging the polymer from metal containing particles with a centrifugal force such that the centrifugal force times the time duration of centrifugation divided by the viscosity of the polymer solution equals or exceeds about 50 G-minutes/cp, and recovering a polymer solution comprising less than 10 ppm by weight, based on the polymer, of the Group VIII metal.

    摘要翻译: 提供了一种方法,其包括以下步骤:基于100重量份的聚合物溶液使含有聚合物溶液的第VIII族金属加氢催化剂残余物与约2-约50重量份的水接触,用离心机从含金属的颗粒中离心分离 使得离心力乘以离心时间除以聚合物溶液的粘度等于或超过约50G分钟/厘泊,并回收包含基于聚合物的小于10重量ppm的聚合物溶液, 第VIII族金属。

    Ammonium polysulfide removal of HCN from gaseous streams, with
subsequent production of NH.sub.3, H.sub.2 S, and CO.sub.2
    30.
    发明授权
    Ammonium polysulfide removal of HCN from gaseous streams, with subsequent production of NH.sub.3, H.sub.2 S, and CO.sub.2 失效
    多氯化铵从气态物流中除去HCN,随后生成NH3,H2S和CO2

    公开(公告)号:US4505881A

    公开(公告)日:1985-03-19

    申请号:US556256

    申请日:1983-11-29

    申请人: Zaida Diaz

    发明人: Zaida Diaz

    摘要: A process for the removal of HCN from gaseous streams is described, the process being characterized by reaction of the HCN in the gaseous stream with an ammonium polysulfide solution, formation of ammonium thiocyanate in solution, decomposition of ammonium polysulfide and precipitation of sulfur from the ammonium thiocyanate solution in a stripping zone, and hydrolysis of the ammonium thiocyanate. Recycle or recovery of sulfur and hydrolysis products are contemplated.

    摘要翻译: 描述了从气流中除去HCN的方法,该方法的特征在于气态物流中的HCN与多硫化铵溶液的反应,硫氰酸铵在溶液中的形成,多硫化铵的分解和硫从铵中的沉淀 硫氰酸盐溶液在汽提区,硫氰酸铵水解。 预期硫和水解产物的回收或回收。