Process for decreasing the hygroscopicity of polycarboxylates
    2.
    发明授权
    Process for decreasing the hygroscopicity of polycarboxylates 失效
    减少聚碳酸酯的混合物的方法

    公开(公告)号:US3987218A

    公开(公告)日:1976-10-19

    申请号:US478425

    申请日:1974-06-11

    IPC分类号: C08J3/00 B05D7/00

    摘要: A process for decreasing the hygroscopicity of a polycarboxylate, said process comprising preparing a melt of a composition having a melting point of about 40.degree. - 120.degree. C, said composition giving an acid or neutral pH in an aqueous solution or suspension, said composition being less hygroscopic than said polycarboxylate, said composition capable of being free flowing under equilibrium conditions at about 30.degree. C and in an air atmosphere of at least about 40% relative humidity; heating said melt in a mixer to a temperature of up to about 140.degree. C; gradually adding said polycarboxylate as a powder to said melt while mixing said melt; wherein said composition comprises at least about 3 and at most about 40% by weight of the mixture resulting after all polycarboxylate has been added to said melt.

    Pump with improved seal
    7.
    发明授权
    Pump with improved seal 失效
    泵具有改进的密封

    公开(公告)号:US4854834A

    公开(公告)日:1989-08-08

    申请号:US71396

    申请日:1987-07-09

    IPC分类号: F04D29/10

    CPC分类号: F04D29/106

    摘要: A pump has a rotor-carrying pump shaft rotatably supported within an internal pipe by a plurality of spaced bearings. A lowermost bearing is located in the vicinity of the rotor near the end of the internal pipe. Adjacent to the lowermost bearing is a seal provided in a reduced-pressure chamber within the internal pipe, the chamber being closed off at the lower end by the bearing juxtaposed to the rotor. The reduced-pressure chamber is connected to an outlet opening in an external pipe which surrounds the internal pipe and is spaced therefrom to provide a transport channel for effluent material being moved by the rotating rotor.

    摘要翻译: 泵具有通过多个间隔开的轴承可旋转地支撑在内管内的转子承载泵轴。 最下方的轴承位于靠近内管末端的转子附近。 靠近最下方的轴承是设置在内管内的减压室中的密封件,该腔室在下端被与转子并置的轴承封闭。 减压室连接到外管中的出口开口,该外管围绕内管并与其间隔开,以提供用于通过旋转转子移动的废液的输送通道。

    Process for bleaching cellulose with organic peracid
    8.
    发明授权
    Process for bleaching cellulose with organic peracid 失效
    用有机过酸漂白纤维素的方法

    公开(公告)号:US4400237A

    公开(公告)日:1983-08-23

    申请号:US232217

    申请日:1981-02-06

    IPC分类号: D21C9/16

    CPC分类号: D21C9/16

    摘要: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.

    摘要翻译: 纤维素通过有机过酸在酸性区域中漂白,随后通过碱性区域中的过氧化物漂白。 作为过酸,使用在无机酸存在下与过氧化氢反应由相应的羧酸生成的酸。 在过量漂白步骤之后的过氧化物漂白步骤在添加必需量的碱性水溶液以进行纸浆的过氧化物漂白步骤之后进行,而不中间洗涤纤维素。 不进一步加入过氧化物。

    Vertical control rod for rapid and safe shut-off of nuclear reactors
    9.
    发明授权
    Vertical control rod for rapid and safe shut-off of nuclear reactors 失效
    用于快速,安全地关闭核反应堆的垂直控制杆

    公开(公告)号:US3932215A

    公开(公告)日:1976-01-13

    申请号:US341278

    申请日:1973-03-14

    申请人: Horst Kruger

    发明人: Horst Kruger

    IPC分类号: G21C7/14 G21C9/027 G21C7/12

    摘要: Vertical control rod includes an absorber formed of flexible members and suspended by a traction device below the reactor core during operation of the reactor and a tensional spring for drawing the absorber into the reactor core to shut off the reactor. The control rod is operable independently of gravity and avoids jamming of the absorber in the guide therefor.

    摘要翻译: 垂直控制杆包括由反应器操作期间由柔性构件形成的吸收体并被反应堆芯下方的牵引装置悬挂,并且用于拉伸弹簧用于将吸收器拉入反应堆芯中以关闭反应器。 控制杆可独立于重力操作,并避免吸收器卡在引导件中。

    Overflow sieve
    10.
    发明授权
    Overflow sieve 失效
    溢流筛

    公开(公告)号:US5472608A

    公开(公告)日:1995-12-05

    申请号:US304538

    申请日:1994-09-12

    IPC分类号: B01D29/07 B01D29/13 B01D39/10

    CPC分类号: B01D29/071 B01D2201/184

    摘要: An overflow sieve in which the sieve bottom is in the form of a slotted hole sheet whose slots have a width less than 1.0 mm and a length of 0.5 to 4 mm or a fine hole sheet with noncircular holes of a greatest width or diameter of less than 2 mm.

    摘要翻译: 一个溢流筛,其中筛底为狭缝孔的形式,其狭缝的宽度小于1.0mm,长度为0.5至4mm,或具有最小宽度或直径较小的非圆形孔的细孔板 超过2毫米。