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    • 61. 发明申请
    • Diesel particulate matter reduction system
    • 柴油颗粒物减少系统
    • US20060236684A1
    • 2006-10-26
    • US11373497
    • 2006-03-10
    • Wenzhong ZhangJulian ImesTodd TaubertTimothy RickeTheodore Angelo
    • Wenzhong ZhangJulian ImesTodd TaubertTimothy RickeTheodore Angelo
    • F01N3/00F01N3/10
    • F01N3/0231B01D53/9459B01D2255/102B01D2255/50B01D2255/915B01D2258/012F01N3/035F01N13/009F01N13/0093F01N2250/02F01N2330/02F01N2330/12F01N2330/325F01N2330/38F01N2330/42
    • A diesel exhaust treatment system is disclosed that includes first and second diesel particulate reduction devices. The first diesel particulate reduction device is located upstream in the exhaust flow and contains an oxidation catalyst coating. The second particulate reduction device is located downstream from the first particulate reduction device and is generally non-catalyzed or lightly catalyzed. Each particulate reduction device comprises a flow-through fabric-type filtration media with substantial internal turbulence. As exhaust gas passes through the catalyzed upstream particulate reduction device, nitric oxide (NO) is oxidized to form nitrogen dioxide (NO2), a portion of which interacts with the particulate trapped within the upstream diesel particulate reduction device to regenerate the upstream device. A remaining portion of exhaust gas containing NO2 enters the downstream diesel particulate reduction device, where an additional portion interacts with the trapped particulate to regenerate the device. The relative volume weighted efficiency of the upstream particulate reduction device and of the downstream particulate reduction device are selected to optimize the overall system particle capture efficiency and backpressure, as well as to balance the amount of NO2 made with the amount of NO2 consumed so as to minimize NO2 emissions.
    • 公开了一种包括第一和第二柴油颗粒减少装置的柴油机排气处理系统。 第一柴油颗粒减少装置位于废气流的上游并且包含氧化催化剂涂层。 第二颗粒减少装置位于第一颗粒还原装置的下游,并且通常是非催化的或轻微的催化的。 每个颗粒还原装置包括具有实质内部湍流的流通织物型过滤介质。 当废气通过催化的上游颗粒还原装置时,一氧化氮(NO)被氧化以形成二氧化氮(NO 2 H 2),其一部分与捕获在上游柴油颗粒还原物内的颗粒相互作用 设备重新生成上游设备。 含有NO 2 N 2的排气的剩余部分进入下游柴油颗粒还原装置,其中附加部分与捕获的颗粒相互作用以再生装置。 选择上游颗粒还原装置和下游颗粒还原装置的相对体积加权效率以优化整个系统颗粒捕获效率和背压,以及平衡由下列颗粒还原装置制备的NO 2 2 / 消耗的NO 2量的量以使NO 2排放最小化。
    • 65. 发明授权
    • Catalytic applications of mesoporous metallosilicate molecular sieves and methods for their preparation
    • 介孔金属硅酸盐分子筛的催化应用及其制备方法
    • US06391278B1
    • 2002-05-21
    • US09246739
    • 1999-02-08
    • Thomas J. PinnavaiaPeter T. TanevWenzhong ZhangJialiang WangMalama Chibwe
    • Thomas J. PinnavaiaPeter T. TanevWenzhong ZhangJialiang WangMalama Chibwe
    • C01B3344
    • B01J21/04B01J21/066B01J23/14B01J29/0308B01J29/041B01J29/046B01J29/049B01J29/89B01J35/1061B01J37/03B01J37/036C01B33/20C01B37/00C01B37/005C01B37/02C07C46/06C07C46/08
    • A neutral templating route to mesoporous molecular sieves based on H-bonding and self-assembly between neutral primary amine or diamine surfactants (S°) and neutral inorganic precursors (I°) has been used to prepare hexagonal and lamellar mesoporous silicas with site isolated transition metal centers. This templating approach allows for the preparation of hexagonal or hexagonal-like mesoporous oxidation catalysts with large framework wall thickness of at least about 17 Å, small elementary particle size (≦400 Å), and unique combinations of framework-confined mesopores and textural mesopores while at the same time providing for facile recovery of the neutral template by simple solvent extraction. The templating of neutral metallosilicate precursors (I°) with neutral diamine surfactants (S°—S°) affords thermally stable pillared lamellar metallosilicates exhibiting complementary framework-confined microporosity and textural mesoporosity while at the same time also providing for template recovery by solvent extraction. In addition, a hexagonal transition metal-substituted catalysts, analogous to MCM-41, have been prepared using the mediated S+X−I+ templating pathway (Pathway 3) and mild reaction conditions.
    • 已经使用了基于中性伯胺或二胺表面活性剂(S°)和中性无机前体(I°)之间的H键和自组装的介孔分子筛的中性模板化途径来制备具有位置分离转移的六方晶系和层状介孔二氧化硅 金属中心。 该模板方法允许制备具有至少约17埃的大框架壁厚度,小的基本粒度(<= 400)的六边形或六边形样介孔氧化催化剂,以及框架约束的中孔和结构中孔的独特组合 同时通过简单的溶剂萃取提供中性模板的简便回收。 中性金属硅酸盐前体(I°)与中性二胺表面活性剂(S°-S°)的模板提供了表现出互补的框架限制的微孔性和结构中等孔隙度的热稳定的柱状金属硅酸盐,同时也提供了通过溶剂萃取的模板回收。 此外,使用介导的S + X-I +模板途径(途径3)和温和的反应条件,已经制备了类似于MCM-41的六方晶过渡金属取代的催化剂。
    • 66. 发明授权
    • Porous aluminum oxide materials prepared by non-ionic surfactant
assembly route
    • 通过非离子表面活性剂装配路线制备的多孔氧化铝材料
    • US6027706A
    • 2000-02-22
    • US72870
    • 1998-05-05
    • Thomas J. PinnavaiaWenzhong Zhang
    • Thomas J. PinnavaiaWenzhong Zhang
    • C01B37/00C01F7/02
    • C01B37/00
    • Semi-crystalline alumina compositions with framework mesopores are disclosed. The compositions are assembled from inorganic aluminum precursors and nonionic polyethylene oxide surfactants. The new assembly pathway introduces several new concepts to alumina mesostructure synthesis. The application of low-cost, non-toxic and biodegradable surfactants and low cost aluminum reagents as alumina precursors which are inorganic and low solution reaction temperatures, introduces efficient and environmentally clean synthetic techniques to the formation of mesostructures. Recovery of the surfactant can be achieved through solvent extraction where the solvent may be water or ethanol or by calcination.
    • 公开了具有骨架中孔的半结晶氧化铝组合物。 组合物由无机铝前体和非离子聚环氧乙烷表面活性剂组装。 新的装配路径为氧化铝介孔结构合成提出了几个新概念。 低成本,无毒和可生物降解的表面活性剂和低成本铝试剂作为氧化铝前体的应用是无机和低溶液反应温度,为形成介观结构引入了有效和环保的合成技术。 表面活性剂的回收可以通过溶剂萃取来实现,其中溶剂可以是水或乙醇或通过煅烧。
    • 70. 发明授权
    • Comparator and clock signal generation circuit
    • 比较器和时钟信号发生电路
    • US08975926B2
    • 2015-03-10
    • US14190093
    • 2014-02-26
    • Wenzhong ZhangChris C. DaoJehoda RefaeliYi Zhao
    • Wenzhong ZhangChris C. DaoJehoda RefaeliYi Zhao
    • H03K5/22H03K3/3565
    • H03K3/3565
    • A comparator used in a clock signal generation circuit compares two input signals and generates an output signal. The comparator has first and second input transistors coupled to the input signals. First and second hysteresis transistors are coupled between the input transistors and an output stage of the comparator, and apply hysteresis to a comparison of the input signals. First and second hysteresis control transistors are coupled between the input transistors and the hysteresis transistors to isolate the hysteresis transistors from the input transistors under control of a hysteresis enable signal. The comparator is operable in a first mode or a second mode based on a hysteresis enable signal. In the first mode the comparator applies hysteresis to the comparison of the input signals and in the second mode, compares the input signals without hysteresis.
    • 在时钟信号发生电路中使用的比较器比较两个输入信号并产生输出信号。 比较器具有耦合到输入信号的第一和第二输入晶体管。 第一和第二滞后晶体管耦合在输入晶体管和比较器的输出级之间,并且将迟滞应用于输入信号的比较。 第一和第二滞环控制晶体管耦合在输入晶体管和滞后晶体管之间,以在迟滞使能信号的控制下将滞环晶体管与输入晶体管隔离。 比较器可基于滞后使能信号在第一模式或第二模式中操作。 在第一种模式下,比较器对输入信号的比较应用迟滞,而在第二种模式下,比较输入信号而没有滞后。