利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

2 条记录 (耗时 0.008 秒)

    METHOD TO INCREASE THE VISCOSITY OF HYDROGELS BY CROSSLINKING A COPOLYMER IN THE PRESENCE OF DISSOLVED SALT
    1.
    发明申请
    METHOD TO INCREASE THE VISCOSITY OF HYDROGELS BY CROSSLINKING A COPOLYMER IN THE PRESENCE OF DISSOLVED SALT 审中-公开
    通过在溶解盐存在下交联共聚物来增加水凝胶粘度的方法

    公开(公告)号：WO2015113577A1

    公开(公告)日：2015-08-06

    申请号：PCT/EP2014/000252

    申请日：2014-01-30

    申请人： TOUGAS OILFIELD SOLUTIONS GMBH

    发明人： DUGONJIC-BILIC, Fatima ,  BÜHLER, Jasmin ,  USENER, Carolin ,  NEUBER, Marita

    IPC分类号： C09K8/68 ,  A61L27/52

    CPC分类号： C09K8/685 ,  C08J3/075 ,  C08J3/24 ,  C08J2333/26 ,  C09K8/887 ,  E21B43/26 ,  E21B43/267

    摘要： Disclosed is a method to synthesize hydrogels with increased viscosity from a solution that contains water, a copolymer and a dissolved salt of an alkaline metal, an earth alkaline metal and/or an organic amine by addition of a zirconium compound as a crosslinker which comprises i) providing a copolymer containing 0.005 to 20 weight % of structural units of formula I, 4.995 to 40 weight% of structural units of formula II and 5 to 95 weight % of structural units of formula III wherein R 1 , R 4 and R 6 are independently of one another hydrogen or C 1 -C 6 -alkyl,R 2 , R 3 and R 5 are independently of one another hydrogen, a cation of an alkaline metal, of an earth alkaline metal, of ammonia and/or of an organic amine, R 7 and R 8 are independently of one another hydrogen or C 1 -C 6 -alkyhA is a covalent C-P bond or a two-valent organic bridge group, and B is a covalent C-S bond or a two-valent organic brigde group, and wherein the percentage of the structural units refers to the total mass of the copolymer, preparing an aqueous solution by adding the copolymer prepared in step i) to a solution comprising water and the salt of the alkaline metal, the earth alkaline metal and/or the organic amine, forming a network of a hydrogel by addition of at least one Zirconium- compound to the aqueous solution prepared in step ii), and selecting the amount of the salt of the alkaline metal, the earth alkaline metal and/or the organic amine in the hydrogel to range from 0.15 and 10 weight%, referring to the total mass of the hydrogel. The method can be used to prepare hydrogels used in fracturing operations.

    摘要翻译： 公开了一种通过添加锆化合物作为交联剂，从含有水，共聚物和碱金属，碱土金属和/或有机胺的溶解盐的溶液中合成具有增加粘度的水凝胶的方法，该方法包括i ）提供含有0.005-20重量％式I结构单元，4.995-40重量％式II结构单元和5-95重量％式III结构单元的共聚物，其中R 1，R 4和R 6独立地为一个 另一个氢或C 1 -C 6烷基，R 2，R 3和R 5彼此独立地为氢，碱金属阳离子，碱土金属的氨和/或有机胺，R 7和R 8独立地为 另一个氢或C 1 -C 6烷基是共价CP键或2价有机桥基，B是共价CS键或2价有机基团，其中结构单元的百分比是指 共聚物的总质量 通过将步骤i）中制备的共聚物加入到包含水和碱金属盐，碱土金属和/或有机胺的盐的溶液中制备水溶液，通过加入至少形成水凝胶网络 一种锆化合物与步骤ii）中制备的水溶液反应，并将水凝胶中的碱金属，碱土金属和/或有机胺的盐的量选择为0.15-10重量％，参考 水凝胶的总质量。 该方法可用于制备压裂作业中使用的水凝胶。