912results about "Molybdeum compounds" patented technology

A homogeneous ceria-based mixed-metal oxide, useful as a catalyst support, a co-catalyst and / or a getter has a relatively large surface area per weight, typically exceeding 150 m<2> / g, a structure of nanocrystallites having diameters of less than 4 nm, and including pores larger than the nanocrystallites and having diameters in the range of 4 to about 9 nm. The ratio of pore volumes, VP, to skeletal structure volumes, VS, is typically less than about 2.5, and the surface area per unit volume of the oxide material is greater than 320 m<2> / cm<3>, for low internal mass transfer resistance and large effective surface area for reaction activity. The mixed metal oxide is ceria-based, includes Zr and or Hf, and is made by a novel co-precipitation process. A highly dispersed catalyst metal, typically a noble metal such as Pt, may be loaded on to the mixed metal oxide support from a catalyst metal-containing solution following a selected acid surface treatment of the oxide support. Appropriate ratioing of the Ce and other metal constituents of the oxide support contribute to it retaining in a cubic phase and enhancing catalytic performance. Rhenium is preferably further loaded on to the mixed-metal oxide support and passivated, to increase the activity of the catalyst. The metal-loaded mixed-metal oxide catalyst is applied particularly in water gas shift reactions as associated with fuel processing systems, as for fuel cells.

A device for generating hydrogen gas is provided. The device (101) comprises a first hydrogen-containing composition (107) that reacts with a second composition to evolve hydrogen gas; a dispenser (105) adapted to apply the first composition to a first porous member (109); and a conduit (111) adapted to supply the second composition to the first porous member. In a preferred embodiment, the first composition is selected from the group consisting of hydrides, borohydrides and boranes, the second composition is water, and the dispenser is spring-loaded and is charged with the first composition. As the first composition reacts with water at the interface to evolve hydrogen gas, the dispenser forces the reaction product across the interface and out of the dispenser, where it will not interfere with the progress of the hydrogen evolution reaction.

A method is disclosed for separating and recovering base metals from a used hydroprocessing catalyst originating from Group VIB and Group VIII metals and containing at least a Group VB metal. In one embodiment, the used catalyst is contacted with an ammonia leaching solution to dissolve and separate the Group VIB and VIII metals from the Group VB metal complex and coke associated with the used catalyst. The resulting Group VIB and VIII metal containing solution is processed through at least two additional precipitation and liquid / solid separation steps to produce, in separate processing streams, a Group VIB metal product solution (such as ammonium molybdate) and a Group VIII metal product solution (such as nickel sulfate). Additionally, two separate filtrate streams are generated from liquid-solid separation steps, which filtrate streams are combined and subjected to hydrolysis and oxidation (oxydrolysis) to generate a purified ammonium sulfate solution for further processing, such as for fertilizer.

The invention belongs to the technological field of coal chemical processing and discloses a heat dissolving and catalyzing method using brown coal to prepare liquid fuel. The method comprises the following steps: 1) the brown coal is smashed and dried to prepare pulverized coal; 2) the pulverized coal, solvent and catalyst are stirred and mixed well to prepare coal slurry; wherein, the weight percent of the pulverized coal is 30 percent to 40 percent; the weight percent of the solvent is 60 percent to 70 percent; the quantity of the added catalyst is 0.5 percent to 1 percent of the weight of the pulverized coal; 3) the coal slurry is dissolved by heat and catalyzed to prepare heat dissolved and liquefied products; wherein, the temperature is 390 DEG C to 450 DEG C; the pressure is 5.0MPa to 9.0MPa; the reaction time is 30 minutes to 60 minutes; 4) the heat dissolved and liquefied products are separated to form gas-phase, liquid-phase and solid-phase products; 5) the liquid products are extracted and processed to form liquid fuel. The invention also discloses catalyst and solvent used in the method. The operation condition of the method of the invention is mild; the conversion ratio of the organic substances in the brown coal can achieve a higher level; after being processed, the liquid fuel product can be used for preparing engine fuel suiting national standards; and the preparation equipment is simple; the investment is small; the cost is low; and the invention is a coal liquefaction method suiting the national conditions of China.

A process for economically separating and recovering valuable metal components, with few kinds of chemicals being used, with no waste water that causes environmental pollution being discharged, and also perfectly no by-products being formed by means of simple steps. The process includes a step of leaching a raw material containing at least vanadium oxides and molybdenum oxides with ammonia-containing leaching water to obtain a leached solution containing a vanadium compound and a molybdenum compound, a step of adding ammonium orthomolybdate to the leached solution to separate and recover the deposited ammonium metavanadate from a first solution for separation, a step of adding a water-soluble alcohol to the separated solution to separate and recover the deposited ammonium orthomolybdate from a second solution for separation, a step of distilling the second solution for separation to separate and recover the water-soluble alcohol and a residue solution, a step of adding at least a portion of the residue solution to the ammonia-containing leaching water as the portion thereof, and a step of returning a portion of the recovered ammonium orthomolybdate and a total of a recovered, water-soluble alcohol to the system for reusing.