摘要:
A process for preparing a molybdenum sulfide-based catalyst comprises drying a precipitated molybdenum sulfide-based catalyst precursor, for example, a wet filter cake, such that a particulate catalyst precursor, containing from 12 to 15 percent by weight water, is formed. The particulate catalyst precursor is desirably in the form of free-flowing particles. The particulate catalyst precursor is then auto-reduced. A rotary furnace that subjects the catalyst precursor to at least two zones having distinct temperatures may be conveniently used for drying, auto-reduction, or both. The staged drying and auto-reduction steps reduce the tendency of the precursor to self-heat, which is undesirable because it reduces both the activity and selectivity of the final catalyst.
摘要:
本発明は、金属成分と硫黄を導電性容器中に収容し、非酸化性雰囲気下において該容器に直流パルス電流を通電して多孔性金属と硫黄を反応させることを特徴とする硫化金属の製造方法、及びこの方法で得られる組成式:MS x (式中、Mは、Ni、Cu、Fe及びCoからなる群から選ばれた少なくとも一種であり、1<x≦2である)で表される金属硫化物を提供するものである。 本発明によれば、高容量のリチウム二次電池用正極活物質として優れた性能が期待される硫黄原子比の高い金属硫化物を簡便に作製できる。
摘要:
Procédé de traitement d'un produit contenant de l'amiante comprenant les étapes suivantes: a) fourniture d'un produit solide divisé contenant de l'amiante, b) préparation d'un milieu réactionnel comprenant le produit solide divisé contenant de l'amiante et une solution aqueuse d'un acide minéral, c) traitement par lixiviation du produit solide divisé à l'aide d'une solution aqueuse d'un acide minéral, d) séparation solide/ lixiviat liquide, puis d'une part le traitement à pH acide du lixiviat liquide obtenu à l'étape d) et/ou d'autre part le traitement alcalin du solide obtenu à l'étape d).
摘要:
A process for the recovery of a metal sulfide from a metal ion containing solution, including the steps of: a) providing a slurry containing seed particles of said metal sulfide; b) adding a sulfide ion containing solution to said slurry to form an activated seed slurry; c) mixing said activated seed slurry with said metal ion containing solution to thereby form a metal sulfide precipitate; and d) recovering said metal sulfide precipitate.
摘要:
The invention relates to a spray pyrolysis method characterized in that it is used in the synthesis of nanoparticles with a closed structure of metal chalcogens having a lamellar crystalographic structure of general formula MaXb, wherein M represents a metal and X represents a chalcogen, a and b represent the respective proportions of metal and chalcogen, and in that it comprises pyrolysis of a liquid aerosol obtained from a solution of at least one metal precursor (M) and a chalcogen (X), or at least one precursor of said metal (M) and at least one precursor of said chalcogen (X) dissolved in a solvent, said solution being atomized into fine droplets in a suspension in a vector gas
摘要:
Certain embodiments are directed to method for making and using an alkali promoted transition metal sulfide Fischer Tropsch catalyst. Certain embodiments are directed to alkali promoted transition metal sulfide Fischer Tropsch catalyst synthesized using steps comprising (i) mixing an ammonium tetrathiomolybdate (ATM) precursor compound with an alkali metal compound and molybdenium disulfide in deionized water to form a reaction mixture, (ii) heating the reaction mixture at a temperature of at least 200, 250, 300, 350, 400C at a pressure of at lease 900, 1000, 1100, 1500, 2000 psi for more than 0.5 1, 1.5, 2.0, 3 or more hours to form a reaction product, (iii) filtering, washing, and drying the reaction product.
摘要:
Carboxylic acids are prepared by a one-step gas phase process comprising the step of contacting under halogen-free hydroxycarbonylation conditions an alkene, carbon monoxide, water, and a solid sulfide-containing catalyst.
摘要:
Le procédé de production d'hydrogène à partir d'un effluent comportant de l'hydrogène sulfuré consiste à mettre en contact l'effluent arrivant par le conduit (8) avec un matériau (7) comportant au moins un oxyde métallique de manière à produire de l'hydrogène et un sulfure métallique. Le métal dudit oxyde est choisi parmi les éléments du groupe VIIB ou VIIIB de la classification périodique de Mendeleïev.
摘要:
Certain embodiments are directed to method for making and using an alkali promoted transition metal sulfide Fischer Tropsch catalyst. Certain embodiments are directed to alkali promoted transition metal sulfide Fischer Tropsch catalyst synthesized using steps comprising (i) mixing an ammonium tetrathiomolybdate (ATM) precursor compound with an alkali metal compound and molybdenium disulfide in deionized water to form a reaction mixture, (ii) heating the reaction mixture at a temperature of at least 200, 250, 300, 350, 400C at a pressure of at lease 900, 1000, 1100, 1500, 2000 psi for more than 0.5 1, 1.5, 2.0, 3 or more hours to form a reaction product, (iii) filtering, washing, and drying the reaction product.
摘要:
Embodiments of the present disclosure provide for methods of making quantum dots (QDs) (passivated or unpassivated) using a continuous flow process, systems for making QDs using a continuous flow process, and the like. In one or more embodiments, the QDs produced using embodiments of the present disclosure can be used in solar photovoltaic cells, bio-imaging, IR emitters, or LEDs.