LOW TEMPERATURE OXIDATION OF AMMONIA IN NITRIC ACID PRODUCTION
    5.
    发明申请
    LOW TEMPERATURE OXIDATION OF AMMONIA IN NITRIC ACID PRODUCTION 审中-公开
    硝酸在硝酸生产中的低温氧化

    公开(公告)号:US20120183467A1

    公开(公告)日:2012-07-19

    申请号:US13006460

    申请日:2011-01-14

    IPC分类号: C01B21/38

    摘要: Ammonia in a gas stream comprising oxygen and nitrogen may be effectively completely oxidized to a mixture of NO and NO2 for further processing to nitric acid. The gas stream is flowed over fine particles of La1-xSrxCoO3 and/or La1-xSrxMnO3, and/or La1-xSrxFeO3 where x=about 0.1, 0.2, or 0.3. The particles are supported as catalyst layers on gas stream-contacting surfaces of a flow-through catalyzed oxidation reactor. These relatively inexpensive perovskite-type materials may be used to promote oxidation of ammonia at temperatures below about 450° C. to about 500° C. to selectively produce a mixture of NO and NO2. This mixture is suitable for further oxidation to NO2 for adsorption into water to make nitric acid.

    摘要翻译: 包含氧和氮的气流中的氨可以有效地完全氧化成NO和NO 2的混合物,以进一步加工成硝酸。 气流在La1-xSrxCoO3和/或La1-xSrxMnO3和/或La1-xSrxFeO3的细颗粒上流动,其中x =约0.1,0.2或0.3。 颗粒在流通催化的氧化反应器的气流接触表面上作为催化剂层被支撑。 这些相对便宜的钙钛矿型材料可用于在低于约450℃至约500℃的温度下促进氨的氧化,以选择性地产生NO和NO 2的混合物。 该混合物适于进一步氧化成NO2以吸附到水中以制备硝酸。

    SCR catalysts preparation methods
    7.
    发明授权
    SCR catalysts preparation methods 有权
    SCR催化剂制备方法

    公开(公告)号:US08956992B2

    公开(公告)日:2015-02-17

    申请号:US13282594

    申请日:2011-10-27

    摘要: A method of replacing or exchanging non-metal charge balancing cations located at ion-exchanges sites within SAPO frameworks with cations of a transition metal using a solid state ion-exchange process. Transition metal-containing particles are formed on surfaces of SAPO particles, and thereafter the particles are heated in air to initiate the solid-state ion-exchange process. The transition metal-containing particles and the SAPO particles are heated to a temperature and for an amount of time to produce transition metal cations, and for the transition metal cations to replace at least a portion of the non-metal cations located within the SAPO frameworks.

    摘要翻译: 一种使用固态离子交换工艺替代或交换位于SAPO框架内的离子交换位置的非金属电荷平衡阳离子与过渡金属的阳离子的方法。 在SAPO颗粒的表面上形成过渡金属的颗粒,然后在空气中加热颗粒以引发固态离子交换过程。 将含过渡金属的颗粒和SAPO颗粒加热到一定温度和一段时间以产生过渡金属阳离子,并且对于过渡金属阳离子替代位于SAPO框架内的至少一部分非金属阳离子 。