65results about "Molybdenum halides" patented technology

The present invention relates to a process for producing molybdenum dioxide dichloride, which is a very efficient process that does not use hazardous chlorine gas and high reaction temperatures and enables the production of molybdenum dioxide dichloride in high yield without solvent.

To provide glass fiber yarn and a method for manufacturing the same.SOLUTION: A method for manufacturing glass fiber yarn comprises a coating step of coating a molybdenum compound on the surfaces of inorganic particles to form the surface-treated inorganic particles; a sintering step of sintering the surface-treated inorganic particles on a temperature condition of 400 to 1,000°C in a nitrogen gas atmosphere; a mixture step of mixing the surface-treated inorganic particles into a molten glass raw material; and a spinning step of spinning the molten glass raw material including the surface-treated inorganic particles to form glass fiber yarns.SELECTED DRAWING: Figure 1

The present invention provides a method for preparing molybdenum dioxide dichloride based on a molybdenum-containing solution. The technical scheme comprises the following steps: adjusting the pH of the molybdenum-containing solution to 7.5-9.0 using a pH regulator to obtain a treated molybdenum-containing solution; adding a calcium source to the treated molybdenum-containing solution at a molar ratio of molybdenum to calcium source of 1:1.5-2.0, stirring, and solid-liquid separation to obtain a molybdenum-containing precipitate; mixing the molybdenum-containing precipitate with a chlorinating agent at a molar ratio of molybdenum to chlorinating agent of 1:1-4 to obtain a chlorination reaction product; placing the chlorination reaction product in a reaction apparatus, introducing a protective atmosphere, and reacting at 150-180°C for 1-3 hours to produce molybdenum dioxide dichloride gas; and condensing the molybdenum dioxide dichloride gas at 0-50°C to obtain molybdenum dioxide dichloride based on the molybdenum-containing solution. This method features a simple process, environmental friendliness, high safety, and low energy consumption. The prepared molybdenum dioxide dichloride based on the molybdenum-containing solution is of high purity.

The invention relates to preparation equipment of high-purity electronic-grade molybdenum hexafluoride, which comprises a molybdenum hexafluoride reactor used for heating molybdenum powder and fluorine gas to react; the cyclone separator is connected to the discharge end of the molybdenum hexafluoride reactor and is used for carrying out gas-solid separation on the molybdenum hexafluoride original gas to obtain crude molybdenum hexafluoride gas; the variable-pressure condensation filter is connected to the gas outlet end of the cyclone separator, and the variable-pressure condensation filter is used for carrying out variable-pressure condensation on the molybdenum hexafluoride crude gas and filtering impurities solidified after condensation to obtain molybdenum hexafluoride crude liquid; the light component removal tower is connected to the liquid outlet end of the variable-pressure condensation filter, and hydrogen fluoride is removed from the molybdenum hexafluoride crude product liquid by the light component removal tower; the liquid inlet end of the bubble breaking rectifying tower is connected to the bottom of the light component removal tower, and the bubble breaking rectifying tower is used for purifying molybdenum hexafluoride in the molybdenum hexafluoride crude product liquid to obtain the electronic grade molybdenum hexafluoride.

Methods for controlling the crystal phase ratio of a molybdenum precursor are provided. A method includes gasifying a molybdenum reagent in a first vessel at a first temperature and a first pressure to obtain a gasified molybdenum precursor; flowing the vaporized molybdenum precursor from the first vessel to a second vessel; and condensing the vaporized molybdenum precursor in the second vessel at a second temperature and a second pressure to obtain a crystal phase ratio of the molybdenum precursor.

Methods for removing impurities from precursors and related systems are provided. A method comprises at least one thermal cycle. The at least one thermal cycle comprises one or more of the following steps: heating a vessel comprising a precursor and at least one impurity to a temperature for a duration sufficient to vaporize at least a portion of the at least one impurity; measuring a vapor pressure within the vessel to obtain a measured vapor pressure and comparing the measured vapor pressure to a set point vapor pressure; and when the measured vapor pressure is above or within the set point vapor pressure, removing, from the vessel, at least a portion of a vapor comprising the at least one impurity. Other methods and systems are provided herein.

This invention discloses a process for preparing chlorides by reducing chlorination with rare metal oxides, comprising the following steps: S1, in an inert atmosphere, a mixture containing rare metal oxide powder, a reducing agent, and a chloride salt is subjected to a reduction reaction at a predetermined temperature 1; S2, the temperature is lowered to a predetermined temperature 2, oxygen is introduced, and the concentration of oxygen in the mixed gas is adjusted to carry out a chlorination reaction, and the chlorinated product is condensed and collected. This invention eliminates the need for gaseous chlorinating agents such as chlorine or hydrogen chloride, avoiding the leakage risks of liquid chlorine and compressed hydrogen chloride during storage and transportation; the raw materials can be directly rare metal oxides, with a wide range of sources, good process adaptability, and significantly reduced production costs.

The present invention relates to a hybrid nanomaterial comprising an octahedral crystalline cluster of formula [Mo6Ii8(OH)a4(H2O)a2]·2H2O, wherein the crystalline cluster is supported on graphene. Furthermore, the invention relates to a method for preparing the hybrid nanomaterial of the invention, and to a gas detection system comprising at least: (a) a gas sensor provided with a hybrid nanomaterial according to the present invention; and (b) optical interrogation means and / or electrical interrogation means configured to interrogate the gas sensor.

To provide a method for manufacturing high-purity molybdenum oxychloride and a manufacturing apparatus thereof.SOLUTION: The present invention relates to a method for manufacturing molybdenum oxychloride including: a reaction step of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating them to prepare molybdenum oxychloride (MoO2Cl2); a solidification and condensation step of transferring a reacted material in the reactor from the reactor to a condensation tank to solidify the reacted material on a surface of the condensation tank; a liquefaction step of heating a product solidified in the solidification and condensation step to convert the product into a liquid phase; and a purification step of filtering the product liquefied in the liquefaction step to increase purity, and a manufacturing apparatus thereof.SELECTED DRAWING: Figure 1

The present invention relates to high-purity molybdenum dichloride dioxide and a preparation method therefor. In the molybdenum dichloride dioxide, the amount of silicon (Si) in the impurities is 400 wt ppm or less. High-purity molybdenum dichloride dioxide can be obtained due to a preparation process that includes sublimation purification.

The present invention relates to high-purity molybdenum dichloride dioxide and a preparation method therefor. In the molybdenum dichloride dioxide, the amount of silicon (Si) in the impurities is 400 wt ppm or less. High-purity molybdenum dichloride dioxide can be obtained due to a preparation process that includes sublimation purification.

The invention relates to a method for producing MoO2Cl2 under inert conditions, comprising the steps of:(i) charging a reaction vessel with MoO2,(ii) reacting the MoO2 with supplied Cl2 in the reaction vessel at a first temperature T1 to give gaseous MoO2Cl2,(iii) transferring the gaseous MoO2Cl2 into a receiving vessel,(iv) resublimating the gaseous MoO2Cl2 in the receiving vessel to give solid MoO2Cl2 at a second temperature T2 that is lower than T1, and(v) recovering solid MoO2Cl2 with a purity determined by ICP-OES / MS of 99.9996 wt. % or more.The invention also relates to high-purity MoO2Cl2, the use thereof, and electronic components.

Provided are a method for producing high-purity molybdenum oxychloride and an apparatus for producing the same. Specifically, provided are a method for producing molybdenum oxychloride and an apparatus for producing the same, the method comprising: a reaction process of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating to produce molybdenum oxychloride (MoO2Cl2); a solidification and coagulation process of transferring the reacted substance in the reactor from the reactor to a coagulation tank so as to solidify the reacted substance on the surface of the coagulation tank; a liquefaction process of heating the product cured in the curing coagulation process to convert the product into a liquid phase; and a purification process of filtering the product liquefied in the liquefaction process to increase purity.

This invention relates to an apparatus for preparing high-purity electronic-grade molybdenum hexafluoride, comprising: a molybdenum hexafluoride reactor for heating and reacting molybdenum powder and fluorine gas; a cyclone separator connected to the outlet of the molybdenum hexafluoride reactor for gas-solid separation of the raw molybdenum hexafluoride gas to obtain crude molybdenum hexafluoride gas; a pressure swing condenser connected to the outlet of the cyclone separator for pressure swing condensation of the crude molybdenum hexafluoride gas and filtration of the solidified impurities after condensation to obtain crude molybdenum hexafluoride liquid; a light-light-removal tower connected to the liquid outlet of the pressure swing condenser for removing hydrogen fluoride from the crude molybdenum hexafluoride liquid; and a defoaming distillation tower connected to the bottom of the defoaming distillation tower for purifying the molybdenum hexafluoride in the crude molybdenum hexafluoride liquid to obtain electronic-grade molybdenum hexafluoride.

The invention relates to a bubble breaking rectifying tower for preparing high-purity electronic grade molybdenum hexafluoride and a control method, the bubble breaking rectifying tower comprises a plurality of bubble stretching and thinning mechanisms, each bubble stretching and thinning mechanism comprises a gas flow guide frame body, a fixed plate body and a bubble attachment plate, the gas flow guide frame bodies and the fixed plate bodies are arranged on a first mounting bracket at intervals, and the gas flow guide frame bodies and the fixed plate bodies are arranged on a second mounting bracket at intervals; the middle part of the bubble attachment plate is transversely hinged to the top end of the fixed plate body, the bubble attachment plate shields an opening of the gas guide frame body in an unstressed state, and the gas guide frame body and the bubble attachment plate are arranged at an interval; the liquid driving devices are arranged on the second mounting support and used for outputting liquid towards the top of the bubble attachment plate, the bubble attachment plate stretches and thinns a contact line between the foam corresponding fixing plate body and the bubble attachment plate in the rapid swinging process, and after the bubble attachment plate and the gas flow guide frame body are opened, the bubble attachment plate and the gas flow guide frame body are separated from each other. And the bubble attachment plate drives air to flow into the opening so as to break the stretched and thinned part.

Methods for controlling crystalline phase ratios of molybdenum precursors are provided. A method comprises vaporizing, at a first temperature and a first pressure, a molybdenum reagent in a first vessel to obtain a vaporized molybdenum precursor; flowing the vaporized molybdenum precursor from the first vessel to a second vessel; and condensing, at a second temperature and a second pressure, the vaporized molybdenum precursor in the second vessel to obtain a crystalline phase ratio of the molybdenum precursor.

To provide a method for manufacturing high-purity molybdenum oxychloride and a manufacturing apparatus thereof.SOLUTION: The present invention relates to a method for manufacturing molybdenum oxychloride including: a reaction step of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating them to prepare molybdenum oxychloride (MoO2Cl2); a solidification and condensation step of transferring a reacted material in the reactor from the reactor to a condensation tank to solidify the reacted material on a surface of the condensation tank; a liquefaction step of heating a product solidified in the solidification and condensation step to convert the product into a liquid phase; and a purification step of filtering the product liquefied in the liquefaction step to increase purity, and a manufacturing apparatus thereof.SELECTED DRAWING: Figure 1

The present invention relates to a hybrid nanomaterial comprising an octahedral crystalline cluster of formula [Mo6Ii8(OH)a4(H2O)a2]·2H2O, wherein the crystalline cluster is supported on graphene. Furthermore, the invention relates to a method for preparing the hybrid nanomaterial of the invention, and to a gas detection system comprising at least: (a) a gas sensor provided with a hybrid nanomaterial according to the present invention; and (b) optical interrogation means and / or electrical interrogation means configured to interrogate the gas sensor.

Aspects disclosed herein include a system for generating singlet oxygen in a gas, the system comprising: a substrate; and hexanuclear clusters operably immobilized on at least a portion of the substrate; wherein each hexanuclear cluster comprises a photosensitive octahedral core complex characterized by formula FX1a: M6X8 (FX1a); wherein each M is independently Mo, W, or Re; wherein each X is independently a halide anion ligand; wherein the clusters are exposed to the gas and the gas comprises O2 gas; wherein the clusters are exposed to a light; and wherein each hexanuclear cluster is a photosensitizer configured to generate the gaseous singlet oxygen when irradiated by the light in the presence of the O2 gas.

Methods for removing impurities from precursors and related systems are provided. A method comprises at least one thermal cycle. The at least one thermal cycle comprises one or more of the following steps: heating a vessel comprising a precursor and at least one impurity to a temperature for a duration sufficient to vaporize at least a portion of the at least one impurity; measuring a vapor pressure within the vessel to obtain a measured vapor pressure and comparing the measured vapor pressure to a set point vapor pressure; and when the measured vapor pressure is above or within the set point vapor pressure, removing, from the vessel, at least a portion of a vapor comprising the at least one impurity. Other methods and systems are provided herein.

Provided are a method for manufacturing high-purity molybdenum oxychloride and a manufacturing apparatus thereof. Specifically, provided are a method for manufacturing molybdenum oxychloride including: a reaction process of adding molybdenum powder, chlorine gas, and oxygen to a reactor and heating to prepare molybdenum oxychloride (MoO2Cl2); a solidification and condensation process of transferring a reacted material in the reactor from the reactor to a condensation tank to solidify the reacted material on a surface of the condensation tank; a liquefaction process of heating a product solidified in the solidification and condensation process to convert the product into a liquid phase; and a purification process of filtering the product liquefied in the liquefaction process to increase purity, and a manufacturing apparatus thereof.

Provided is a process which allows uranium and molybdenum fluorides to be efficiently separated, said process comprising a step of providing a mixture containing MoF6 and UF6; a step of reducing the UF6 to UF5 in the gas phase or in a liquid phase; and a step of separating the UF5 and the MoF6 or a conversion product thereof which may be obtained by further converting the molybdenum fluoride to another molybdenum compound. In a further aspect, a process for the fluorination of metals or semimetals is provided.

An apparatus for producing molybdenum oxyhalide according to one aspect of the present invention comprises a reaction zone to which a halogen-containing gas is supplied, wherein a raw material containing molybdenum oxide is transferred so as to pass through the reaction zone, and molybdenum oxyhalide is produced.

The present invention relates to a method for producing molybdenum dioxide dichloride. The method for producing molybdenum dioxide dichloride of the present invention can produce molybdenum dioxide dichloride in high yield and without using hazardous chlorine gas or high reaction temperatures, and therefore has the advantages of being safe and being capable of being produced in both small-scale and large-scale production, making it an industrially very useful and efficient method.

This application provides a method for the sublimation purification of electronic-grade molybdenum-based compounds, belonging to the field of electronic specialty gas purification technology. The method includes the following steps: S1. A solid raw material is placed in a sublimation tube, and high-purity inert gas is supplied into the sublimation tube until the pressure is not lower than 0.1 MPa. High-purity inert gas is continuously supplied under heating conditions to purge the solid raw material in the sublimation tube. The processing temperature is higher than the sublimation point of low-sublimation-point impurities at this pressure but lower than the sublimation point of the molybdenum-based compound at this pressure, yielding an intermediate. S2. The temperature of the sublimation tube is lowered to room temperature, and the supply of high-purity inert gas is stopped. The sublimation tube is evacuated until the pressure drops below 100 Pa. Then, the intermediate in the sublimation tube is heated, wherein the processing temperature is not lower than the sublimation point of the molybdenum-based compound at this pressure. The molybdenum-based compound prepared by this method has both high purity and high yield.

This invention relates to a defoaming distillation column and control method for preparing high-purity electronic-grade molybdenum hexafluoride, comprising: several bubble stretching and thinning mechanisms, each including a gas guiding frame, a fixed plate, and a bubble attachment plate. The gas guiding frame and the fixed plate are spaced apart on a first mounting bracket. The middle part of the bubble attachment plate is laterally hinged to the top of the fixed plate. When the bubble attachment plate is not under stress, it blocks the opening of the gas guiding frame. A gap is provided between the gas guiding frame and the bubble attachment plate. Several liquid driving devices are mounted on a second mounting bracket. The liquid driving devices output liquid toward the top of the bubble attachment plate. During the rapid oscillation of the bubble attachment plate, the contact line between the foam and the fixed plate and the bubble attachment plate is stretched and thinned. After an opening appears between the bubble attachment plate and the gas guiding frame, the bubble attachment plate drives air into the opening, thereby breaking the stretched and thinned portion.

Provided is a molybdenum oxychloride characterized in having a purity of 99.9995 wt% or higher. Additionally provided is a manufacturing method of a molybdenum oxychloride including the steps of reacting MoO3 and Cl2 and synthesizing the molybdenum oxychloride in a reaction chamber, and cooling the synthesized molybdenum oxychloride gas and precipitating the molybdenum oxychloride in a recovery chamber, wherein an impurity trap is provided between the reaction chamber and the recovery chamber, and impurities are removed with the impurity trap. An object of the present invention is to provide a high-purity molybdenum oxychloride and a manufacturing method therefor.

The invention discloses a purification method and a purification system of molybdenum pentachloride, and belongs to the technical field of purification of molybdenum pentachloride. The solid raw materials are placed at the bottom of a sublimation tube, and the sublimation tube is vacuumized to be not higher than 1 mBar. Adjusting the temperature of the heater and the condensation finger in the sublimation pipe, so that the low-sublimation-point impurities in the solid raw material are sublimated and desublimated in sequence and are attached to the condensation finger on the lower layer, and removing part of the first impurities in advance. Then the temperature is adjusted again, so that molybdenum pentachloride in the solid raw material is sublimated and desublimated in sequence and is attached to the condensation finger on the upper layer, and second impurities in the solid raw material are left at the bottom of the sublimation tube. And the circulation is carried out, the temperature of the condensation finger is adjusted step by step, and a high-purity molybdenum pentachloride product is obtained at the condensation finger on the upper layer.

A molybdenum oxychloride compact comprising molybdenum oxychloride and less than 10 weight percent of a binder, the compact having a bulk density greater than 0.85 g / cc.