Process for preparing 1-chloro-1,2,2-trifluoroethylene or
1,2,2-trifluoroethylene
    81.
    发明授权
    Process for preparing 1-chloro-1,2,2-trifluoroethylene or 1,2,2-trifluoroethylene 失效
    制备1-氯-1,2,2-三氟乙烯或1,2,2-三氟乙烯的方法

    公开(公告)号:US5498806A

    公开(公告)日:1996-03-12

    申请号:US369259

    申请日:1995-01-05

    CPC分类号: C07C17/00 B01J23/56 C07C17/23

    摘要: 1-Chloro-l,2,2-trifluoroethylene or 1,2,2-trifluoroethylene is prepared by reacting 1,1,2-trichloro-1,2,2-trifluoroethane and hydrogen in the presence of a catalyst which comprises at least one metal selected from the group consisting of palladium, rhodium and ruthenium and at least one metal selected from the group consisting of mercury, lead, cadmium, tin, indium, copper, bismuth, thallium and silver and a carrier selected from the group consisting of Al.sub.2 O.sub.3, SiO.sub.2 and activated carbon, whereby selectivities and yields of 1-chloro-1,2,2-trifluoroethylene or 1,2,2-trifluoroethylene are optimized by selecting the kinds of metals and supports.

    摘要翻译: 通过使1,1,2-三氯-1,2,2-三氟乙烷和氢在催化剂存在下反应制备1-氯-1,2,2-三氟乙烯或1,2,2-三氟乙烯,该催化剂至少包含 选自钯,铑和钌的一种金属和选自汞,铅,镉,锡,铟,铜,铋,铊和银的至少一种金属和选自以下的载体: Al 2 O 3,SiO 2和活性炭,从而通过选择金属和载体的种类来优化1-氯-1,2,2-三氟乙烯或1,2,2-三氟乙烯的选择性和收率。

    Gradient radiation image conversion sheet
    82.
    发明授权
    Gradient radiation image conversion sheet 失效
    梯度辐射图像转换片

    公开(公告)号:US4816350A

    公开(公告)日:1989-03-28

    申请号:US7405

    申请日:1987-01-27

    IPC分类号: G21K4/00 A61B6/00

    CPC分类号: G21K4/00 Y10S428/917

    摘要: A gradient radiation image conversion sheet, comprising a protective layer a fluorescent layer and a support layer, and the transmissions of said protective layer and/or said fluorescent layer are partially changed and the dots of the print of said gradient patterns and the border between the printed area and the unprinted area are blurred. The gradient image conversion sheet has a gradation area in which the change in transmission is extremely smooth and a speed ratio which may be set in a relatively wide range, and the sheet can be produced through a mass-production system to give products of constant quality.

    摘要翻译: 包括荧光层和支撑层的保护层以及所述保护层和/或所述荧光层的透射的梯度辐射图像转换片部分地改变,并且所述梯度图案的印刷点和 打印区域和未打印区域模糊。 梯度图像转换片具有其中透射变化非常平滑的渐变区域和可以在相对宽的范围内设定的速度比,并且该片材可以通过批量生产系统产生以产生恒定质量的产品 。

    Dynamic memory device
    83.
    发明授权
    Dynamic memory device 失效
    动态存储设备

    公开(公告)号:US4777624A

    公开(公告)日:1988-10-11

    申请号:US884808

    申请日:1986-07-11

    CPC分类号: G11C11/4096

    摘要: A dynamic memory device comprises a dynamic memory circuit, an input buffer circuit for temporarily storing data each time it is received from a source external to the device; an output buffer circuit for temporarily storing data each time it is read out from the dynamic memory circuit and for outputting the stored data in a unit of a predetermined number of words each time a request for reading is made; and a control circuit for controlling the input and output buffer circuits so that reading and writing operations can be performed independently of a refreshing operation.

    摘要翻译: 动态存储器件包括动态存储器电路,每当从器件外部的源接收数据时临时存储数据的输入缓冲器电路; 输出缓冲电路,用于每当从动态存储器电路读出数据时临时存储数据,并且每当进行读取请求时,以预定数量的单位的单位输出存储的数据; 以及用于控制输入和输出缓冲电路的控制电路,使得能够独立于刷新操作执行读取和写入操作。