Process for producing partially hydrolyzed polyacrylamide in the
presence of alkali metal hydroxide and boric acid
    11.
    发明授权
    Process for producing partially hydrolyzed polyacrylamide in the presence of alkali metal hydroxide and boric acid 失效
    在碱金属氢氧化物和硼酸存在下制备部分水解的聚丙烯酰胺的方法

    公开(公告)号:US3968093A

    公开(公告)日:1976-07-06

    申请号:US469443

    申请日:1974-05-13

    CPC分类号: C08F120/56

    摘要: A process for producing a partially hydrolyzed polyacrylamide which has a high molecular weight and high water solubility and can be suitably used as a flocculant for water treatment and a size for paper manufacture comprising polymerizing an aqueous solution of an acrylamide monomer in the presence of an alkali metal hydroxide such as sodium hydroxide and boric acid, whereby a partial hydrolysis of the polymer formed is also conducted substantially simultaneously with the polymerization. In an additional embodiment, a maturing of the polyacrylamide produced can be conducted by continuing to heat the polymer solution to increase the hydrolysis percentage.

    摘要翻译: 一种生产部分水解的聚丙烯酰胺的方法,其具有高分子量和高水溶性,并且可以适合用作水处理的絮凝剂和纸制造的尺寸,包括在碱的存在下聚合丙烯酰胺单体的水溶液 金属氢氧化物如氢氧化钠和硼酸,由此在聚合过程中基本上同时进行形成的聚合物的部分水解。 在另外的实施方案中,所生产的聚丙烯酰胺的成熟可以通过继续加热聚合物溶液以提高水解百分比来进行。

    Communication satellite facility and satellite communication system providing bidirectional wideband intersatellite communication
    12.
    发明授权
    Communication satellite facility and satellite communication system providing bidirectional wideband intersatellite communication 失效
    通信卫星设施和卫星通信系统提供双向宽带卫星间通信

    公开(公告)号:US07184762B2

    公开(公告)日:2007-02-27

    申请号:US10652032

    申请日:2003-09-02

    IPC分类号: H04Q7/20

    CPC分类号: H04B7/18521 H04B7/18515

    摘要: A communication satellite facility and a satellite communication system adapted to respond flexibly to development and change of communication technologies occurring on the ground even after satellites have been launched. The system includes a first satellite having an antenna function, a second satellite having a modem function and a third satellite having a server function all of which are launched into one and same slot of geosynchronous orbit and connected one to another by wideband intersatellite communication. A ground station connected to a ground network communicates with the first satellite.

    摘要翻译: 一种通信卫星设施和卫星通信系统,适用于即使在卫星发射后也能灵活应对发生和发生在地面上的通信技术的变化。 该系统包括具有天线功能的第一卫星,具有调制解调器功能的第二卫星和具有服务器功能的第三卫星,所有第三卫星都被发射到地球同步轨道的同一时隙中,并通过宽带卫星间通信相互连接。 连接到地面网络的地面站与第一颗卫星通信。

    Heat pump system
    13.
    发明授权
    Heat pump system 失效
    热泵系统

    公开(公告)号:US4843837A

    公开(公告)日:1989-07-04

    申请号:US103523

    申请日:1987-09-29

    摘要: A heat pump system adapted to use a non-azeotropic refrigerant mixture preferably containing a high boiling temperature refrigerant as a primary component thereof is given an improved heat transfer efficiency and its pressure loss is minimized by arranging a refrigerant extracting means for removing the refrigerant stagnating in the system in an unfavorable state, in a vapor state in a condenser or in liquid state in an evaporator and returning the removed refrigerant into a refrigerant circulating passage of the system; and by constructing an evaporator of a flooded type at least at a portion adjacent to a refrigerant outlet portion of the evaporator.

    摘要翻译: 适于使用优选含有高沸点制冷剂作为其主要组分的非共沸混合制冷剂混合物的热泵系统具有改进的传热效率,并且通过设置用于除去停滞在制冷剂中的制冷剂的制冷剂提取装置来最小化其压力损失 该系统处于不利状态,在蒸发器中处于蒸汽状态或在蒸发器中处于液态,并将排出的制冷剂返回到系统的制冷剂循环通道中; 并且至少在与蒸发器的制冷剂出口部分相邻的部分处构造淹水型蒸发器。

    Process for the preparation of cationic polymers
    14.
    发明授权
    Process for the preparation of cationic polymers 失效
    阳离子聚合物的制备方法

    公开(公告)号:US4514551A

    公开(公告)日:1985-04-30

    申请号:US572753

    申请日:1984-01-23

    CPC分类号: D21H17/455 C08F220/56

    摘要: A process for preparing a cationic polymer which comprises polymerizing a monomer mixture containing acrylamide and a cationic alkenyl monomer represented by the general formula: ##STR1## wherein R.sup.1 represents H or CH.sub.3 ; R.sup.2 and R.sup.3 represent independently CH.sub.3 or C.sub.2 H.sub.5 ; R.sup.4 represents H, CH.sub.3, C.sub.2 H.sub.5 or a benzyl group; A represents --OC.sub.n H.sub.2n -- (wherein n=2 or 3), ##STR2## or --NC.sub.n H.sub.2n -- (wherein n=2 or 3); and X.sup.- represents Cl.sup.-, Br.sup.-, I.sup.-, CH.sub.3 SO.sub.4.sup.-, C.sub.2 H.sub.5 SO.sub.4.sup.-, 1/2SO.sub.4.sup.-- or CH.sub.3 COO.sup.-, in the form of a sheet in an aqueous medium, characterized in that the composition ratio of acrylamide/cationic alkenyl monomer is within the range of 95/5 to 5/95, and the polymerization is carried out in the presence of a phosphite. The polymers obtained according to this process are free from insolubles produced under the influence of oxygen.

    摘要翻译: 一种制备阳离子聚合物的方法,其包括聚合含有丙烯酰胺和由以下通式表示的阳离子烯基单体的单体混合物:其中R 1表示H或CH 3; R2和R3独立地表示CH3或C2H5; R4代表H,CH3,C2H5或苄基; A表示-OC n H 2n - (其中n = 2或3),或者-NC n H 2n - (其中n = 2或3); 和X-表示在水性介质中的片状形式的Cl-,Br-,I-,CH 3 SO 4 - ,C 2 H 5 SO 4 - ,1 / 2SO 4 - 或CH 3 COO-,其特征在于丙烯酰胺/阳离子烯基 单体在95/5〜5/95的范围内,聚合在亚磷酸盐存在下进行。 根据该方法获得的聚合物不含在氧气的影响下产生的不溶物。

    Production of acrylamide using immobilized cells
    15.
    发明授权
    Production of acrylamide using immobilized cells 失效
    使用固定化细胞生产丙烯酰胺

    公开(公告)号:US4421855A

    公开(公告)日:1983-12-20

    申请号:US292848

    申请日:1981-08-14

    CPC分类号: C12N11/04 C12P13/02

    摘要: A process is described for producing acrylamide from acrylonitrile using an immobilized microorganism containing gel, which comprises immobilizing a microorganism having nitrilasic activity with a cationic acrylamide-based polymer gel and bringing acrylonitrile into contact with the immobilized microorganism gel in an aqueous medium containing substantially no salt.

    摘要翻译: 描述了一种用于使用固定化的含有微生物的凝胶从丙烯腈制备丙烯酰胺的方法,该方法包括用阳离子丙烯酰胺类聚合物凝胶固定具有亚硝酸活性的微生物,并使丙烯腈与基本上不含盐的水性介质中的固定化微生物凝胶接触 。

    Movable dome-type roof for structure
    16.
    发明授权
    Movable dome-type roof for structure 失效
    可移动圆顶型屋顶结构

    公开(公告)号:US5189851A

    公开(公告)日:1993-03-02

    申请号:US759744

    申请日:1991-09-12

    IPC分类号: E04B7/10 E04B7/16 E04H3/16

    CPC分类号: E04H3/165 E04B7/102 E04B7/163

    摘要: A structure having a movable dome-type roof including a plurality of independently movable shell sections which nest one beneath the other. A frame superstructure is arched over the dome to support the upper ends of the shell sections. The lower edges of the shell sections are mounted on self-powered carriages and are independently shiftable about a circular base of the structure. By selectively shifting individual shell sections, the dome may be contracted or expanded as desired. The superstructure may be mounted on a circular track or on a pair of linear tracks to expedite the opening and closing of the dome.

    摘要翻译: 一种具有可移动圆顶型屋顶的结构,其包括多个可独立移动的外壳部分,这些外壳部分嵌套在另一个之下。 框架上部结构在圆顶上拱形以支撑壳体部分的上端。 壳体部分的下边缘安装在自动动力滑架上,并且可以围绕结构的圆形基座独立地移动。 通过选择性地移动单个壳体部分,可以根据需要缩小或扩大圆顶。 上部结构可以安装在圆形轨道上或一对线性轨道上,以加速穹顶的打开和关闭。