Ultra-fine gold particle-immobilized alkaline earth metal compounds and
methods for production thereof
    2.
    发明授权
    Ultra-fine gold particle-immobilized alkaline earth metal compounds and methods for production thereof 失效
    超细金颗粒固定碱土金属化合物及其制备方法

    公开(公告)号:US4937219A

    公开(公告)日:1990-06-26

    申请号:US247651

    申请日:1988-09-22

    摘要: An ultra-fine gold particle-immobilized alkaline earth metal compound having ultra-fine gold particles immobilized on an alkaline earth metal compound is useful as a catalyst or as an inflammable gas sensor. This compound is produced by (1) adding an aqueous solution of a gold compound dropwise to an aqueous solution containing an alkaline earth metal compound and having a pH value kept in the range of 7 to 11 thereby inducing immobilization of gold hydroxide on the compound, separating from the solution the gold hydroxide-immobilized compound, and calcining the separated compound at a temperature in the range of 80.degree. to 800.degree. C., (2) by adding a reducing agent to an aqueous solution of an alkaline earth metal having a gold compound dissolved therein, (3) by adding carbon dioxide gas or an acidic aqueous solution to an aqueous solution containing a gold compound and an alkaline earth metal compound thereby inducing immobilization of gold hydroxide on the alkaline earth metal compound, separating from the solution the gold hydroxide-immobilized compound, and calcining the separated compound at a temperature in the range of 100.degree. to 800.degree. C., or (4) by coprecipitating a gold compound and an alkaline earth metal and calcining the coprecipitate at a temperature in the range of 80.degree. to 800.degree. C.

    摘要翻译: 具有固定在碱土金属化合物上的超细金粒子的超细金粒子固定碱土金属化合物可用作催化剂或可燃性气体传感器。 该化合物通过(1)将金化合物的水溶液滴加到含有碱土金属化合物的水溶液中并且将pH值保持在7〜11的范围内,从而引发金氢氧化物固定在化合物上, 从金属氢氧化物固定化合物溶液中分离,并在80〜800℃的温度范围内煅烧分离出的化合物,(2)通过向碱土金属的水溶液中加入还原剂 金化合物溶解在其中,(3)通过将二氧化碳气体或酸性水溶液加入到含有金化合物和碱土金属化合物的水溶液中,从而导致氢氧化物固定在碱土金属化合物上,与溶液分离 金氢氧化物固定化合物,并在100-800℃的温度下煅烧分离的化合物,或(4)通过共沉淀金化合物 和碱土金属,并在80至800℃的温度下煅烧共沉淀物。

    Humidity detection method
    5.
    发明授权
    Humidity detection method 失效
    湿度检测方法

    公开(公告)号:US5879943A

    公开(公告)日:1999-03-09

    申请号:US872940

    申请日:1997-06-11

    IPC分类号: G01N21/59 G01N21/81 G01N33/18

    CPC分类号: G01N21/81

    摘要: A humidity detection material includes oxide of at least one metal selected from the group consisting of Mg, Ca, Mn, Fe, Co, Ni, and Cu. The metal oxide is preferably in the form of a porous material. The metal oxide is formed preferably in the form of a thin film on a transparent substrate. The humidity detection material is contacted with water vapor in the presence of a gas such as air, and the optical absorbance of the humidity detection material is measured to detect the humidity. The humidity can be detected by an optical method.

    摘要翻译: 湿度检测材料包括选自Mg,Ca,Mn,Fe,Co,Ni和Cu中的至少一种金属的氧化物。 金属氧化物优选为多孔材料的形式。 金属氧化物优选在透明基板上以薄膜的形式形成。 湿度检测材料在空气等气体的存在下与水蒸汽接触,测定湿度检测材料的吸光度,以检测湿度。 可以通过光学方法检测湿度。

    Apparatus for evaluating catalyst performance
    8.
    发明授权
    Apparatus for evaluating catalyst performance 失效
    用于评估催化剂性能的装置

    公开(公告)号:US06495105B1

    公开(公告)日:2002-12-17

    申请号:US09472097

    申请日:1999-12-23

    IPC分类号: B01J3502

    摘要: Apparatus 1 for evaluating catalyst performance according to the invention comprises a reaction vessel 2 in which a plurality of catalysts S are disposed at a distance, supply pipes 3 for supplying a reactant gas into the reaction vessel 2, a plurality of measuring instruments 7 provided with gas sensors 71 for sensing the gas formed by the contact of the reactant gas with a plurality of catalysts S, and outputting signals according to the kinds and concentrations of the formed gas, and a calculating unit 8 for receiving the output signals from the plurality of measuring instruments 7 and identifying the kinds of the formed gas and calculating the concentrations thereof. With such a constitution, performance evaluation on a plurality of catalysts can be made concurrently, quick and in simple steps.

    摘要翻译: 根据本发明的用于评价催化剂性能的装置1包括其中多个催化剂S一定距离地设置的反应容器2,用于将反应气体供应到反应容器2中的供应管3,多个测量仪器7, 气体传感器71,用于感测由反应气体与多个催化剂S的接触形成的气体,并根据形成的气体的种类和浓度输出信号;以及计算单元8,用于接收来自多个 测量仪器7,并确定形成的气体的种类并计算其浓度。 通过这样的结构,可以同时,快速和简单的步骤对多种催化剂进行性能评价。