TEMPERATURSTABILES, ELEKTROLYTHALTIGES HYDROGEL UND VERFAHREN ZUM STIMULIEREN VON ERDÖL- UND ERDGASLAGERSTÄTTEN
    3.
    发明公开
    TEMPERATURSTABILES, ELEKTROLYTHALTIGES HYDROGEL UND VERFAHREN ZUM STIMULIEREN VON ERDÖL- UND ERDGASLAGERSTÄTTEN 审中-公开
    下稳定,含电解质水凝胶和用于刺激油气藏的

    公开(公告)号:EP2999725A1

    公开(公告)日:2016-03-30

    申请号:EP14730425.7

    申请日:2014-05-22

    IPC分类号: C08F220/56 C08K3/08 C09K8/68

    摘要: The invention relates to a temperature-stable hydrogel comprising electrolytic water and a copolymer cross-linked to multivalent metal ions. The invention is characterized in that the copolymer contains at least structural units which are derived at up to 0.005-20 wgt.-% from an ethylenically unsaturated phosphonic acid and alkali metal salts thereof and/or ammonia salts, up to 5-40 wgt.-% from an ethylenically unsaturated sulfuric acid and alkali metal salts thereof and/or ammonia salts and up to 5-94.995 wgt.-% from an amide of an ethylenically unsaturated carboxylic acid selected from the group of acrylamide, methacrylamide and/or C
    1 -C
    4 alkyl derivatives, wherein the percentages are based on the total mass of the monomers used during copolymerization, that the multivalent metal ions for cross-linking of the copolymers belong to the groups IIIA, IVB, VB, VIIB and/or VIIIB of the periodic system of elements, and that the electrolyte content of the hydrogel equals between 0.075 and 25 wgt.-% based on the total mass of the hydrogel. The electrolytic hydrogel can preferably be used for hydraulic fracturing of crude oil or natural gas deposits and for reservoir stimulating of underground waters and is characterized by a very good resistance to saline waters.

    摘要翻译: 本发明涉及一种温度稳定的水凝胶,其包括电解水和共聚物的交联多价金属离子。 本发明在没有共聚物含有为特征的,在高达0005%至20%,导出哪个重量从通过烯属不饱和膦酸以及它们的碱金属盐和/或氨盐,高达5-40%重量的至少结构单元 从到其烯属不饱和硫酸和碱金属盐和/或氨盐和​​至多5至94995%(重量)由烯属不饱和羧酸的选自丙烯酰胺,甲基丙烯酰胺和/或C1-C4烷基衍生物中的酰胺的 ,worin百分比基于共聚中使用的单体的总质量,并没有对于该共聚物的交联的多价金属离子所属的组IIIA,IVB,VB,VIII B和/或VIIIB的周期系统的 元素。

    Membrane filtration of polymer containing solutions
    8.
    发明公开
    Membrane filtration of polymer containing solutions 有权
    膜渗透聚合物Lösungen

    公开(公告)号:EP0939100A1

    公开(公告)日:1999-09-01

    申请号:EP98306674.7

    申请日:1998-08-20

    IPC分类号: C08J11/08 C08J3/14

    摘要: In a method for recovering polymers in a substantially pure form from a solution containing the polymers, the solution is first treated with a reactant (e.g. an acid, a sequestrant or a mixture of both) to form the free polymers and salts of the reactant. Second, the solution is treated to remove the salts therefrom and in a final stage the polymer solution is concentrated and the polymers recovered.
    The second treatment step may consist of membrane-filtration, ion-exchange or electrodialysis.

    摘要翻译: 在从含有聚合物的溶液中回收基本上纯的形式的聚合物的方法中,首先用反应物(例如酸,多价螯合剂或两者的混合物)处理溶液以形成游离聚合物和反应物的盐。 第二,处理溶液以除去其中的盐,并且在最终阶段中聚合物溶液被浓缩并回收聚合物。 第二处理步骤可以由膜过滤,离子交换或电渗析组成。