Method of reducing the viscosity of a black liquor
    1.
    发明授权
    Method of reducing the viscosity of a black liquor 失效
    降低黑液粘度的方法

    公开(公告)号:US5635027A

    公开(公告)日:1997-06-03

    申请号:US415930

    申请日:1995-04-03

    IPC分类号: D21C11/00 D21C11/12

    CPC分类号: D21C11/0092 D21C11/12

    摘要: A method of recycling sodium-based salts used for digesting wood in a digester during the manufacture of pulp and paper. The method comprises collecting a black liquor from the digester, concentrating the black liquor, and adding a salt to the black liquor in an amount sufficient to reduce the viscosity thereof. Preferred salts are thiocyanate salts. The black liquor is then oxidized to produce a green liquor and a causticizer added to the green liquor to produce a white liquor containing the sodium-based salts to be recycled. The white liquor is then returned to the digester.

    摘要翻译: 在纸浆和纸制造过程中循环使用用于在蒸煮器中消化木材的钠盐的方法。 该方法包括从蒸煮器收集黑液,浓缩黑液,并向黑液中加入足以降低其粘度的量的盐。 优选的盐是硫氰酸盐。 然后黑液被氧化以产生绿液,并将苛性剂加入到绿液中以产生含有待再循环的钠基盐的白液。 然后将白酒送回消化器。

    Rheological device for in situ measurements of photo polymerization
kinetics
    5.
    发明授权
    Rheological device for in situ measurements of photo polymerization kinetics 失效
    用于光聚合动力学原位测量的流变装置

    公开(公告)号:US5105655A

    公开(公告)日:1992-04-21

    申请号:US643464

    申请日:1991-01-18

    IPC分类号: G01N11/16 G01N33/44

    CPC分类号: G01N33/442 G01N11/165

    摘要: A rheological device suitable for measuring the rate of polymerization of ultraviolet sensitive polymers includes a part of open-ended cylindrical fixtures having removable quartz windows at one end. The upper fixture is adapted with a window which permits light to enter and impinge upon the surface of an elliptically-shaped mirror. Curing is monitored by measuring the elastic and viscous moduli during polymerization.

    摘要翻译: 适用于测量紫外线敏感聚合物聚合速率的流变学装置包括在一端具有可去除的石英窗的开口圆柱形固定装置的一部分。 上部固定装置适于具有允许光进入并撞击在椭圆形反射镜的表面上的窗口。 通过测量聚合过程中的弹性和粘度模量来监测固化。

    Methods and compositions for fracturing subterranean formations
    7.
    发明授权
    Methods and compositions for fracturing subterranean formations 失效
    压裂地下地层的方法和组成

    公开(公告)号:US5421412A

    公开(公告)日:1995-06-06

    申请号:US209679

    申请日:1994-03-10

    IPC分类号: C09K8/62 C09K8/68 E21B43/267

    摘要: A method of fracturing a subterranean formation which surrounds a well bore comprises the steps of providing a fracturing fluid, and injecting the fracturing fluid into the well bore at a pressure sufficient to form fractures in the subterranean formation which surrounds the well bore. The pressure is then released from the fracturing fluid, after which the fluid may be removed from the well and the well placed into production. The fracturing fluid comprises an aqueous liquid, a polysaccharide soluble or dispersible in the aqueous liquid in an amount sufficient to increase the viscosity of the aqueous liquid, an enzyme breaker which degrades said polysaccharide at a temperature above 180.degree. F. Fracturing fluid compositions and enzyme breaker systems useful for carrying out the invention are also disclosed.

    摘要翻译: 压裂围绕井眼的地下地层的方法包括提供压裂流体的步骤,以及足以在围绕井眼的地层中形成裂缝的压力将压裂流体注入井眼。 然后压力从压裂液中释放出来,然后可以将流体从井中移出并将井放入生产中。 压裂流体包含含水液体,可溶于或分散在含水液体中的多糖,其量足以增加水性液体的粘度,该酶在大于180°F的温度下降解所述多糖。压裂液组合物和酶 还公开了可用于实施本发明的断路器系统。