35 results about "Rhenium compounds" patented technology

The present invention discloses an organic electroluminescent light emitting device which comprises a substrate, an anode, a hole injection layer, a hole transmission layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transmission layer, an electron injection layer and a cathode which are stacked in order. The material of the electron blocking layer is a mixture of an organic silicone small molecule and a phthalocyanine metal compound. The material of the hole blocking layer is a mixture of a rhenium compound and a phosphorescent material. An organic silicone small molecule energy level is wide, an LUMO energy level is high, the pass of electrons to one side of the hole can be effectively blocked, the phthalocyanine metal compound belongs to a crystalline compound, a chain segment can generate scattering for light, and the light emitting efficiency is improved. The HOMO energy level of the rhenium compound is low, the pass of electrons to one side of the cathode to be combined with the electrons can be effectively blocked, and the phosphorescent material has the advantages of good performance and stable light color. The light emitting efficiency can be effectively improved by the electron blocking layer and the hole blocking layer. The invention also discloses the preparation method of the organic electroluminescent light emitting device.

A process for producing an aromatic hydrocarbon, comprises heating the hydrocarbon in the presence of a catalyst carrying a molybdenum compound or a rhenium compound on a metallosilicate carrier modified with a silicon compound, a sodium compound or a calcium compound. The silicon compound is a silane compound having a basic group selected from amino, alkylamino and pyridyl groups and an organic group of a size equal to or greater than the pore size of the metallosilicate and selected from trialkoxy and triphenyl groups and the sodium compound or the calcium compound is a compound having an organic group of a size equal to or greater than the pore size of the metallosilicate and selected from crown ether, hexafluoropentanedione and acetylacetonate. The silane compound, the sodium compound or the calcium compound is modified so as to make an oxide thereof by impregnating the metallosilicate carrier with it and subsequently heat-treating it in an oxygen-containing atmosphere.

The invention relates to a preparation method for a composite silver catalyst used for producing ethylene oxide through ethylene oxidation. The preparation method comprises the following steps: 1) dissolving a compound containing silver and a compound containing chromium in an amine-contained solution or ammonia water so as to prepare a silver-ammonia solution; 2) subjecting an alpha-Al2O3 carrier to soaking in the silver-ammonia solution prepared in the step 1), taking out the soaked alpha-Al2O3, then carrying out draining, and carrying out calcination treatment so as to prepare a semi-finished silver catalyst; 3) dissolving the compound containing silver, the compound containing rhenium and an optional compound containing cesium in the amine-contained solution or the ammonia water so as to prepare the silver-ammonia solution; and 4) subjecting the semi-finished silver catalyst prepared in the step 2) to soaking in the silver-ammonia solution obtained in the step 3), taking out the soaked semi-finished silver catalyst, then carrying out draining, and carrying out calcination treatment so as to prepare the composite silver catalyst. The invention also relates to the composite catalyst and application of the catalyst in production of ethylene oxide.

The present invention relates to a mild and industrially applicable process for preparing sulfinyl derivatives of Formula (II), useful as inhibitors of gastric acid secretion, comprising the selective oxidation of the corresponding sulfides of Formula (I), as represented in scheme (I) and (II) in which said oxidation is performed with hydrogen peroxide in the presence of low amounts of a rhenium compound as catalyst, at a temperature from 0° C. to room temperature.

The present invention provides vanadium-free rare-earth-based titanium-tungsten powder and a preparation method therefor, and solves a difficulty in improving high-temperature aging resistance and dispersity of a catalyst reactive element or an active-center are increased, and a problem of chemical poisoning of a catalyst. The vanadium-free rare-earth-based titanium-tungsten powder of the present invention comprises the components of: 750-900 parts of titanium dioxide, 10-60 parts of tungsten compounds, 30-60 parts of one or more of cerium compounds, lanthanum compounds and rhenium compounds, and 10-15 parts of complex metal oxide of manganese, molybdenum, nickel (Mn-Mo-Ni-OX). According to the present invention, the catalyst has the characteristics of high-temperature aging resistance and a long service life. The catalyst is free of addition of the reactive element vanadium, and is a real environmentally-friendly catalyst.

The invention relates to a rhenium catalyst and a method for catalyzed synthesis of 2-methyl-1,4-naphthoquinone by the rhenium catalyst. The rhenium catalyst is characterized in that a rhenium compound is supported on activated carbon and is coated with a carbon-nitride material; then the rhenium compound is calcined in the atmosphere of inert gas to obtain a coated supported rhenium catalyst, wherein the supporting mass of rhenium accounts for 1 to 3 percent of total mass of the catalyst. The method for the catalyzed synthesis of the 2-methyl-1,4-naphthoquinone by the rhenium catalyst comprises the following specific steps: adding 2-methylnaphthalene, an oxidizing agent and a catalyst into an organic solvent; controlling the reaction temperature and the time to obtain a product, namely the 2-methyl-1,4-naphthoquinone. The catalyst is simple in preparation method, good in stability and suitable for industrial production; in addition, the rhenium catalyst shows good activity and selectivity for the reaction and is easy to recycle and reutilize.

The invention discloses an organic electroluminescent device and a manufacturing method thereof. The organic electroluminescent device comprises a glass substrate, a conductive anode, a hole injection layer, a hole transmission layer, a luminous layer, an electron transmission layer, an electron injection layer and a cathode which are stacked in sequence, wherein the electron injection layer comprises a rhenium compound doped layer, a rubidium compound layer and a metal layer which are stacked in sequence; the rhenium compound doped layer is arranged on the surface of the electron transmission layer and made from a mixed material formed by mixing a rhenium compound with a bipolar organic material at a mass ratio of (1:1) to (4:1); the rubidium compound layer is made from rubidium carbonate, rubidium chloride, rubidium nitrate or rubidium sulfate; the metal layer is made from low-work-function metal with the work function ranging from -2.0 eV to -3.5 eV. The electron injection layer can effectively improve the luminous efficiency of the device.

The invention discloses a preparation method for a platinum and rhenium reforming catalyst and a platinum and rhenium reforming catalyst. The method comprises the steps of: (1) contacting an aluminium oxide carrier with an active ingredient solution containing a platinum compound and a rhenium compound and filtering and drying the mixture to obtain a dried sample; (2) contacting an alkyl sodium xanthate solution with the pH of 7.5-9 with the dried sample and filtering, drying and roasting the mixture to obtain a catalyst intermediate; and (3) contacting the catalyst intermediate with the ingredient solution containing the platinum compound, the rhenium compound and hydrochloric acid, and then drying and roasting the mixture. The method disclosed by the invention integrates a vulcanization process of the catalyst, so that corrosion on equipment before the catalyst is used. The catalyst is simple in production process. In addition, the platinum and rhenium reforming catalyst prepared by the method is free of pre-vulcanization process of the catalyst before the catalyst is used, and compared with a catalyst which is vulcanized by sulfate radicals, the catalyst has a better catalytic performance.

The invention discloses a method for preparing high-purity rhenium(VII) oxide by gas reduction, which comprises the following steps: reducing crude ammonium rhenate into a low-valence rhenium compoundin a reducing gas atmosphere at high temperature, and oxidizing the low-valence rhenium compound in an oxygen atmosphere to obtain the high-valence rhenium oxide rhenium heptaoxide easy to sublimate.The method for preparing the high-purity rhenium(VII) oxide is short in process, high in reaction yield and high in product purity. Through detection, the purity of the high-purity rhenium(VII) oxideproduct prepared by the method is greater than 99.999%, and the rhenium recovery rate is greater than 98.5%.

A process for producing an aromatic hydrocarbon using a lower hydrocarbon as the starting material, the process comprising heating the hydrocarbon in the presence of a catalyst composed of metallosilicate support modified with a silicon compound, a sodium compound or a calcium compound on which a molybdenum compound or a rhenium compound is supported, the silicon compound being a silane compound having a basic group selected from amino, alkylamino and pyridyl groups and an organic group having a size equal to or greater than the pore size of the metallosilicate and selected from trialkoxy and triphenyl groups and, the sodium compound or the calcium compound being a compound having an organic group which has a size equal to or greater than the pore size of the metallosilicate and is selected from crown ether, hexafluoropentadione and acetylacetonate, the catalyst being prepared by impregnating the metallosilicate support with the silane, sodium or calcium compound and then treating the resulting product with heating in an oxygen-containing atmosphere to cause the modification of the metallosilicate support with an oxide of the silane, sodium or calcium compound.

The invention discloses a semi-regenerated reforming catalyst and a preparation method thereof. The preparation method comprises the following steps that 1, a strip-shaped aluminium oxide carrier is prepared, wherein aluminium oxide is gamma-aluminium oxide prepared through aluminum hydroxide which is prepared through alkoxy aluminium hydrolysis; 2, a steeping liquor is prepared, wherein the steeping liquor comprises a platinum compound, a rhenium compound, a competitive adsorbent and ammonium salt; 3, the aluminium oxide carrier is steeped and then dried; 4, through catalyst activation, a catalyst oxidation-state precursor is obtained; 5, the catalyst oxidation-state precursor is subjected to reduction and pre-sulfuration. The ammonium salt is introduced into the steeping liquor, adsorption of a metal compound on the surface of the carrier can be reinforced, the interaction of the prepared catalyst metal-carrier is high, metal components in the catalyst are not easily gathered, the particle diameter of the metal components in the catalyst is small, the catalyst has good activity, selectivity and stability, in the reforming reaction reduction process, the hydrogenolysis side reaction happens, little methane as hydrogenolysis side products exists, and the selectivity of the product for arene is high.

The present invention relates to new rhenium compounds of formula (I)

The invention discloses a method for selectively recycling rhenium from a high-arsenic waste acid system. The method comprises the following steps: (1) extracting high-arsenic waste acid by using a mixed extracting agent to obtain a rhenium-rich organic phase, wherein the mixed extracting agent comprises the following components in percentages by mass: 8-25% of trioctylamine, 2-5% of N1923, 10-20%of isoamyl alcohol and 50-80% of sulfonated kerosene; and (2) washing the rhenium-rich organic phase obtained in the step (1) with water, then performing reverse extraction by using a reverse extraction agent, and collecting a reverse extraction solution to obtain a rhenium-enriched solution. According to the method disclosed by the invention, the high-arsenic waste acid is extracted by adoptingthe optimized mixed extracting agent, the mixed extracting agent has good selective extraction effect on the rhenium, the purity of the product rhenium compound is higher, a large amount of subsequentpurification operation is not needed, and the washing wastewater amount is less.

The invention discloses a method for judging the sub-domain and lattice direction of a rhenium compound film based on an optical method, and belongs to the technical field of two-dimensional nano material characterization. The method comprises the following steps: placing a rhenium-family compound film sample on an objective table of an optical microscope containing polarized light, rotating the position of the rhenium-family compound film sample, photographing the rotated sample, and judging all sub-domains and crystal boundaries of the rhenium-family compound film sample; rGB contrast extraction is carried out on a photo obtained through photographing, and the lattice orientation of each sub-domain is obtained. The method disclosed by the invention is relatively low in equipment condition requirement and simple in operation process, and is a lossless, rapid and convenient method for distinguishing and judging the rhenium sulfide crystal boundary and identifying the lattice orientation of each sub-domain.

The invention relates to an organic light-emitting device and a production method thereof. The organic light-emitting device is of a layered structure and comprises an anode conducting substrate, a hole injection layer, a hole transmission layer, a light-emitting layer, an electron transmission layer, an electron injection layer and a cathode layer which are stacked in sequence; the electron injection layer comprises a rubidium compound layer, a ternary doping layer and a rhenium compound layer; the rubidium compound layer is made of rubidium carbonate, rubidium chloride and rubidium nitrate or rubidium sulfate, the ternary doping layer is made of materials of low-work function metal, high-work function metal and metal sulfide. The rubidium compound layer in the electron injection layer is low in melting point and easy to evaporate and plate; work function is low due to existing of metal ions, electron injection barrier between the electron transmission layer and the injection layer can be lowered, and injection of electrons is benefited.

The invention relates to an organic light-emitting device and a production method thereof. The organic light-emitting device is of a layered structure and comprises an anode conducting substrate, a hole injection layer, a hole transmission layer, a light-emitting layer, an electron transmission layer, an electron injection layer and a cathode layer which are stacked in sequence; the electron injection layer comprises a rubidium compound doping layer and a rhenium compound layer; the rubidium compound doping layer is formed by a rubidium compound and an electron transmission material. The rubidium compound doping layer is formed by the rubidium compound and the electron transmission material, the rubidium compound is low in melting point and easy to evaporate and plate, work function is low due to metal ions, electron injection barrier between the electron transmission layer and the injection layer can be lowered, and injection of electrons is benefited.