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119 条记录 (耗时 0.019 秒)

    Process for the production of methacrylic acid
    1.
    发明授权
    Process for the production of methacrylic acid 失效
    生产甲基丙烯酸的方法

    公开(公告)号：US4803302A

    公开(公告)日：1989-02-07

    申请号：US103580

    申请日：1987-08-21

    申请人： Motomu Oh-Kita ,  Masaaki Kato ,  Masao Kobayashi

    发明人： Motomu Oh-Kita ,  Masaaki Kato ,  Masao Kobayashi

    IPC分类号： B01J23/28 ,  B01J27/198 ,  B01J27/199 ,  C07C51/235 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

    CPC分类号： B01J23/002 ,  B01J27/199 ,  C07C51/252 ,  B01J2523/00

    摘要： A catalyst represented by the general formulaP.sub.a Mo.sub.b V.sub.c Fe.sub.d Cu.sub.e Z.sub.f X.sub.g Y.sub.h O.sub.iwherein X represents at least one or more of the elements selected form the group consisting of potassium, rubidium, cesium and thallium, Y represents at least one or more of the elements selected from the group consisting of tellurium, lanthanum, boron, silver, chromium, magnesium and barium, Z represents any one of the elements of zirconium or antimony, a to i denote atomic ratios of respective elements, and when b=12, a=0.3-4, c=0.01-3, d=0.01-4, e=0.01-3, f=0.01-3, g=0.01-3, h=0.001-5 and i denotes the number of oxygen atoms required for satisfying the valence number of the said ingredients, and a process for the production of methacrylic acid comprising contacting methacrolein in vapor phase in the presence of said catalyst.

    Process for the preparation of catalyst used in the production of unsaturated carboxylic acids
    2.
    发明授权
    Process for the preparation of catalyst used in the production of unsaturated carboxylic acids 失效
    制备用于生产不饱和羧酸的催化剂的方法

    公开(公告)号：US4891347A

    公开(公告)日：1990-01-02

    申请号：US795820

    申请日：1985-11-07

    申请人： Motomu Oh-Kita ,  Kazuhiro Ishii ,  Masaaki Kato ,  Masao Kobayashi

    发明人： Motomu Oh-Kita ,  Kazuhiro Ishii ,  Masaaki Kato ,  Masao Kobayashi

    IPC分类号： B01J27/19 ,  C07B61/00 ,  C07C51/00 ,  C07C51/235 ,  C07C51/25 ,  C07C57/055 ,  C07C67/00

    CPC分类号： C07C51/252 ,  B01J27/19

    摘要： The present invention provides a process for the preparation of a catalyst used in the production of unsaturated carboxylic acids such as methacrylic acid by the gas phase catalytic oxidation of the corresponding unsaturated aldehydes such as methacrolein. Said catalyst is composed of a multi-component composition containing at least phosphorus, molybdenum and antimony. The present invention has attained an improved in its catalytic performance such as conversion rate, selectivity, single-pass yield etc. by using antimony trioxide with average particle size of no more than 0.2 micron as a starting material upon preparing said catalyst.

    摘要翻译： 本发明提供了通过气相催化氧化相应的不饱和醛如甲基丙烯醛，制备用于生产不饱和羧酸如甲基丙烯酸的催化剂的方法。 所述催化剂由至少含有磷，钼和锑的多组分组合物组成。 本发明在制备所述催化剂时，通过使用平均粒径不超过0.2微米的三氧化锑作为起始材料，在其催化性能如转化率，选择性，单程产率等方面得到了改进。

    Process for the production of deuterated acid or deuterated methacrylic acid
    7.
    发明授权
    Process for the production of deuterated acid or deuterated methacrylic acid 失效
    用于生产去酸或去甲基丙烯酸的方法

    公开(公告)号：US5221768A

    公开(公告)日：1993-06-22

    申请号：US522418

    申请日：1990-05-07

    申请人： Masaaki Kato ,  Tetsuya Uno ,  Masao Kobayashi ,  Naoto Osuga

    发明人： Masaaki Kato ,  Tetsuya Uno ,  Masao Kobayashi ,  Naoto Osuga

    IPC分类号： C07B59/00 ,  C07C57/04

    CPC分类号： C07B59/00 ,  C07C57/04

    摘要： In accordance with the present invention, there is provided a process for the production of deuterated acrylic acid or deuterated methacrylic acid comprising the exchange of hydrogens in acrylic acid or methacrylic acid with deuteriums in the presence of a catalyst. The deuterated acrylic or methacrylic acid is very useful as a starting material in the production of high quality optical plastic fibers.

    摘要翻译： 根据本发明，提供了一种制备氘化丙烯酸或氘代甲基丙烯酸的方法，其包括在催化剂存在下，将丙烯酸或甲基丙烯酸中的氢与氘交换。 氘代丙烯酸或甲基丙烯酸作为生产高质量光学塑料纤维的原料非常有用。

    Image capturing device having multiple optical systems
    9.
    发明申请
    Image capturing device having multiple optical systems 失效
    具有多个光学系统的图像捕获装置

    公开(公告)号：US20070024737A1

    公开(公告)日：2007-02-01

    申请号：US11311466

    申请日：2005-12-19

    申请人： Hideo Nakamura ,  Gakuji Horigome ,  Masao Kobayashi ,  Kazuyasu Kurata

    发明人： Hideo Nakamura ,  Gakuji Horigome ,  Masao Kobayashi ,  Kazuyasu Kurata

    IPC分类号： G02B13/16

    CPC分类号： G02B7/102 ,  H04N5/2254 ,  H04N5/23241 ,  H04N5/23293 ,  H04N5/23296

    摘要： In a digital camera having multiple optical systems, multiple image capturing elements are effectively driven to reduce power consumption. A digital camera has a first image capturing optical system having a lens and a first image sensor and a second image capturing optical system having a lens and a second image sensor. A controller and timing generator selects the image signal from the first image capturing optical system while controlling an operation or power of the second image sensor and a clock driver to be OFF when the zoom position falls within a first zoom range. When the zoom position falls within a second zoom range, the image signal from the second image capturing optical system is selected while an operation or power of the first image sensor and a clock driver is controlled to be OFF. An operation or power of the image capturing optical system which is not selected is stopped so that power consumption is reduced.

    摘要翻译： 在具有多个光学系统的数码相机中，有效地驱动多个图像捕获元件以降低功耗。 数码相机具有具有透镜和第一图像传感器的第一图像拍摄光学系统和具有透镜和第二图像传感器的第二图像拍摄光学系统。 当变焦位置落入第一变焦范围内时，控制器和定时发生器选择第一图像拍摄光学系统的图像信号，同时控制第二图像传感器的操作或电源以及时钟驱动器关闭。 当变焦位置落入第二变焦范围内时，在将第一图像传感器和时钟驱动器的操作或功率控制为OFF时，选择来自第二图像拍摄光学系统的图像信号。 停止未选择的图像拍摄光学系统的操作或功率，从而降低功耗。