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18 条记录 (耗时 0.011 秒)

    Modified platinum NOx trap for automotive emission reduction
    1.
    发明授权
    Modified platinum NOx trap for automotive emission reduction 有权
    用于汽车减排的改性铂NOx陷阱

    公开(公告)号：US06537511B1

    公开(公告)日：2003-03-25

    申请号：US09643310

    申请日：2000-08-21

    申请人： Mohinder Singh Chattha ,  Jun (John) Li ,  William Lewis Henderson Watkins ,  Amy Berris

    发明人： Mohinder Singh Chattha ,  Jun (John) Li ,  William Lewis Henderson Watkins ,  Amy Berris

    IPC分类号： C01B2120

    CPC分类号： B01D53/945 ,  B01D53/9422 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01J23/58 ,  B01J23/63 ,  Y02A50/2324 ,  Y02T10/22

    摘要： The invention is a method of treating exhaust gases generated by an internal combustion engine using a NOx trap in the exhaust flow system. The method comprises locating a nitrogen oxide trap in the exhaust gas passage and cycling the air/fuel ratio of the exhaust gases entering the trap between lean and rich, such that the trap absorbs nitrogen oxides during the lean cycle and desorbs the nitrogen oxides when the concentration of the oxygen in the exhaust flow is lowered as during a rich cycle. The trap comprises: (a) a porous support material comprising mostly &ggr;-alumina; (b) a sulfur-suppressing metal selected from the group consisting of cesium, zinc and a combination of cesium and zinc; (c) a precious metal; and (d) a NOx sorption metal such as barium, the metals being deposited in the support material, the amount of the metals being individually dependent on the weight of the support material. The desorbed nitrogen oxides may be converted over the precious metal to N2 by reductants like hydrogen, hydrocarbon and carbon monoxide present in the exhaust gas.

    摘要翻译： 本发明是一种利用排气系统中的NOx捕集器来处理由内燃机产生的废气的方法。 该方法包括将排气通道中的氮氧化物捕集器定位并且循环在贫和富之间进入捕集器的排气的空气/燃料比，使得阱在贫循环期间吸收氮氧化物并且当氮 浓缩循环中的排气流中的氧浓度降低。 捕集器包括：（a）主要包含γ-氧化铝的多孔支撑材料; （b）选自铯，锌和铯和锌的组合的硫抑制金属; （c）贵重金属; 和（d）NOx吸附金属如钡，金属沉积在支撑材料中，金属的量分别取决于载体材料的重量。 解吸的氮氧化物可以通过废气中存在的还原剂如氢，烃和一氧化碳在贵金属上转化为N 2。

    Method and apparatus for NOx reduction in flue gases
    4.
    发明授权
    Method and apparatus for NOx reduction in flue gases 有权
    烟气中NOx还原的方法和装置

    公开(公告)号：US06258336B1

    公开(公告)日：2001-07-10

    申请号：US09276910

    申请日：1999-03-26

    申请人： Bernard P. Breen ,  Harjit S. Hura

    发明人： Bernard P. Breen ,  Harjit S. Hura

    IPC分类号： C01B2120

    CPC分类号： B01D53/56 ,  B01D53/79 ,  F23C6/047 ,  F23C2201/101 ,  F23C2201/301 ,  F23J7/00

    摘要： In a furnace having a primary combustion zone for combustion of a fuel and oxidant, an in-furnace method for reducing nitrogen oxides in combustion products generated in the primary combustion zone in which at least one fluid fuel selected from the group consisting of natural gas, hydrogen, CxHy compounds, CxHyOz compounds and mixtures thereof in an amount in a range of about 2.0% to about 25% of a total heat input to the furnace and at least one nitrogenous compound selected from the group consisting of ammonia, amines, urea, cyanuric acid and mixtures thereof are injected into the furnace downstream of the primary combustion zone, forming an overall fuel-lean NOx-reduction zone.

    摘要翻译： 在具有用于燃烧和氧化剂燃烧的初级燃烧区的炉子中，用于还原在主燃烧区产生的燃烧产物中的氮氧化物的炉内方法，其中至少一种选自天然气， 氢，C x H y化合物，C x H y O z化合物及其混合物，其量为输入炉内总热量的约2.0％至约25％，以及至少一种选自氨，胺，脲， 将氰尿酸及其混合物注入到主燃烧区下游的炉中，形成总体贫燃氮氧化物还原区。

    Process for recovering sodium nitrite
    7.
    发明授权
    Process for recovering sodium nitrite 失效
    回收亚硝酸钠的方法

    公开(公告)号：US06251354B1

    公开(公告)日：2001-06-26

    申请号：US09285927

    申请日：1999-04-02

    申请人： Robert E. Greenwell ,  Thomas Link Guggenheim ,  Norman Enoch Johnson ,  Roy Ray Odle ,  Jimmy Lynn Webb

    发明人： Robert E. Greenwell ,  Thomas Link Guggenheim ,  Norman Enoch Johnson ,  Roy Ray Odle ,  Jimmy Lynn Webb

    IPC分类号： C01B2120

    CPC分类号： C01B21/50

    摘要： The present invention provides a process for recovering a metal nitrite, e.g., sodium nitrite, from a reaction mixture formed from an aromatic displacement reaction such as the synthesis of an aromatic bis(ether phthalimide) in an organic non-polar solvent. The process comprises forming a reaction mixture from the synthesis of an aromatic bis(ether phthalimide) comprising a recoverable amount of metal nitrite; treating the reaction mixture with an amount of water effective to produce an aqueous solution phase of metal nitrite and an organic non-polar phase; and separating the aqueous solution phase of metal nitrite from the organic non-polar phase.

    摘要翻译： 本发明提供了从由有机非极性溶剂中的芳族双（醚邻苯二甲酰亚胺）的合成等芳香置换反应形成的反应混合物中回收亚硝酸金属亚硝酸盐的方法。 该方法包括从合成包含可回收量的金属亚硝酸盐的芳族双（醚邻苯二甲酰亚胺）形成反应混合物; 用有效量的水处理反应混合物以产生金属亚硝酸盐和有机非极性相的水溶液相; 并从有机非极性相分离金属亚硝酸盐的水溶液相。

    Process for the separation of a hydroxylammonium salt solution
    9.
    发明授权
    Process for the separation of a hydroxylammonium salt solution 失效
    羟基铵盐溶液分离方法

    公开(公告)号：US06699452B2

    公开(公告)日：2004-03-02

    申请号：US10176087

    申请日：2002-06-21

    申请人： Theodorus F. M. Riesthuis ,  Werner J. J. Ploumen

    发明人： Theodorus F. M. Riesthuis ,  Werner J. J. Ploumen

    IPC分类号： C01B2120

    CPC分类号： C01B21/1481 ,  C01B21/1418 ,  C01B21/1472

    摘要： Process for the separation of a hydroxylammonium salt solution from an aqueous reaction mixture comprising solid catalyst particles by means of filtration, wherein cake filtration through an asymmetric filter is applied, the asymmetric filter comprising at least two layers having different pore diameter, at least one layer being a filter layer, the pore diameter of the filter layer being between 0.1 and 10 &mgr;m and the thickness of the filter layer being 10 to 1000 &mgr;m.

    摘要翻译： 通过过滤从含有固体催化剂颗粒的含水反应混合物中分离羟基铵盐溶液的方法，其中施加通过不对称过滤器的滤饼过滤，所述不对称过滤器包括至少两层具有不同孔径的至少一层，至少一层 作为过滤层，过滤层的孔径为0.1〜10μm，过滤层的厚度为10〜1000μm。

    Process for producing free hydroxylamine aqueous solution
    10.
    发明授权
    Process for producing free hydroxylamine aqueous solution 失效
    生产游离羟胺水溶液的方法

    公开(公告)号：US06531108B1

    公开(公告)日：2003-03-11

    申请号：US09619156

    申请日：2000-07-19

    申请人： Kumiko Bansho ,  Yoshio Noguchi

    发明人： Kumiko Bansho ,  Yoshio Noguchi

    IPC分类号： C01B2120

    CPC分类号： C01B21/1445

    摘要： This invention provides a highly pure and highly concentrated free hydroxylamine aqueous solution substantially not containing any salt or organic substance. This invention is a process for obtaining a free hydroxylamine aqueous solution, comprising the steps of letting an aqueous solution or slurry containing hydroxylammonium sulfate and an alkali react with each other, to obtain an aqueous solution or slurry containing free hydroxylamine and dissolved or partially precipitated sulfates; mixing the obtained reaction solution and a lower alcohol, to precipitate solid sulfates; separating a solution containing the lower alcohol and some of water by distillation from the aqueous solution remaining after separating and removing the solid sulfates; and obtaining a free hydroxylamine aqueous solution from the remaining solution by distillation.

    摘要翻译： 本发明提供了一种基本上不含任何盐或有机物质的高纯度，高度浓缩的游离羟胺水溶液。本发明是一种获得游离羟胺水溶液的方法，包括以下步骤：使含有羟基硫酸铵和 碱反应，得到含有游离羟胺和溶解或部分沉淀的硫酸盐的水溶液或浆液; 混合得到的反应溶液和低级醇，使固体硫酸盐沉淀; 通过蒸馏从分离和除去固体硫酸盐后残留的水溶液中分离含有低级醇和一些水的溶液; 并通过蒸馏从剩余的溶液中获得游离羟胺水溶液。