SELECTIVE CATALYTIC NOx REDUCTION PROCESS AND APPARATUS PROVIDING IMPROVED GASSIFICATION OF UREA TO FORM AMMONIA-CONTAINING GAS
    5.
    发明申请
    SELECTIVE CATALYTIC NOx REDUCTION PROCESS AND APPARATUS PROVIDING IMPROVED GASSIFICATION OF UREA TO FORM AMMONIA-CONTAINING GAS 有权
    选择性催化还原NOx还原方法和设备改进尿素对形成含氨气体的认证

    公开(公告)号:US20090297417A1

    公开(公告)日:2009-12-03

    申请号:US12472508

    申请日:2009-05-27

    摘要: Disclosed are methods and apparatus enabling the efficient utilization of urea for purposes such as selective catalytic reduction (SCR) of NOx, which enable feeding urea to a chamber designed to efficiently and completely gasify the urea to enable ammonia feed. Preferably, aqueous urea is fed to a gasification chamber, which is also fed with heated gases. An injector means, capable of distributing the aqueous urea as fine droplets, is positioned centrally of a gas distribution plate in the chamber. An arrangement of spaced holes in the gas distribution plate provides higher gas velocity in the vicinity of the injector means than near the walls of the chamber. Uniform gas distribution without equipment fouling is achieved.

    摘要翻译: 公开了能够有效利用尿素的方法和装置,例如NOx的选择性催化还原(SCR),其使得能够将尿素输送到设计成有效地和完全气化尿素以使氨进料的室。 优选地,将水性尿素供给到气化室,其也被加热气体。 能够将尿素作为细小液滴分配的喷射器装置位于腔室中的气体分配板的中心。 在气体分配板中的间隔开的孔的布置在喷射器装置附近提供比在腔的壁附近更高的气体速度。 实现无设备污染的均匀气体分配。

    Method for preparing N,N-disubstituted hydroxylamines
    8.
    发明授权
    Method for preparing N,N-disubstituted hydroxylamines 失效
    制备N,N-二取代羟胺的方法

    公开(公告)号:US6031130A

    公开(公告)日:2000-02-29

    申请号:US81943

    申请日:1998-05-21

    摘要: A method for preparing N,N-disubstituted hydroxylamine compounds represented by the formula (II): HO--N(R.sup.1)(R.sup.2) wherein R.sup.1 and R.sup.2 may be the same or different, and independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aromatic heterocyclic group, which comprises the step of adding a rhenium catalyst and aqueous hydrogen peroxide to a mixture containing a secondary amine compound represented by the formula (I): HN(R.sup.1)(R.sup.2) wherein R.sup.1 and R.sup.2 have the same meanings as those defined above and a dehydrating agent.

    摘要翻译: 制备由式(II)表示的N,N-二取代羟胺化合物的方法:HO-N(R1)(R2)其中R1和R2可以相同或不同,并且独立地表示取代或未取代的烷基, 取代或未取代的芳基或取代或未取代的芳族杂环基,其包括将铼催化剂和过氧化氢水溶液加入到由式(I)表示的仲胺化合物的混合物中:HN(R1)(R2 )其中R1和R2具有与上述相同的含义和脱水剂。