295results about "Calcination" patented technology

The purpose of the present invention is to provide a catalyst that has a high selectivity for α,β-unsaturated aldehydes, α,β-unsaturated carboxylic acids, and the like. This catalyst includes at least molybdenum and bismuth, and exhibits a B / A of 1.3-5, where A represents the ratio of the quantity of bismuth atoms with respect to the quantity of molybdenum atoms, calculated by an inductively coupled radiofrequency plasma (ICP) emission spectrography, and B represents the ratio of the peak area of bismuth atoms with respect to the peak area of molybdenum atoms, measured by an X-ray photoelectron spectroscopy analysis method.

The invention relates to a multi-airflow alternating temperature calcining device for ultra-long nitride single crystal nanofibers. The multi-airflow alternating temperature calcining device comprises a reaction furnace; the mechanical vacuum pressure gauge and the exhaust port are arranged at the top of the reaction furnace; the reaction furnace chamber is arranged in the reaction furnace; the multi-reaction-zone graphite furnace body is arranged in the reaction furnace chamber and comprises a first low-temperature zone, a second high-temperature zone and a third low-temperature zone which are sequentially arranged from bottom to top and are not in contact with one another; the electromagnetic heating controller is arranged on the periphery of the multi-reaction-area graphite furnace body; the graphite boat is movably arranged in the multi-reaction-area graphite furnace body; the movable alumina crucible is arranged in the graphite boat; the graphite columns are arranged at the top and the bottom of the multi-reaction-zone graphite furnace body; the hydraulic cylinder is connected with the graphite column; and a control assembly. Compared with the prior art, the method has the advantages that the nitridation reaction process can be accurately controlled, the fiber quality and the crystal integrity can be improved, and independent and accurate temperature control can be realized.

The disclosure relates to catalysts that include a first zeolite selected from ZSM-5 and Y zeolite impregnated with P2O5 and a second zeolite different from the first zeolite selected from ZSM-5 and Y zeolite impregnated with La2O3. The catalysts can also include alumina, clay, and silica. The catalysts can be used for various hydrocarbon-related processes, such as cracking hydro-treated atmospheric residue (HT AR) and hydro-treated vacuum gas oil (HT VGO).

According to the system for preparing the composite inorganic material from the coal gangue provided by the invention, the system consisting of the pretreatment device, the reaction device, the heating device and the overflow pipeline is constructed, so that the coal gangue is efficiently utilized as a reaction material, and the problems of environmental pollution and resource waste caused by accumulation of the coal gangue are effectively solved. Moreover, by utilizing the system provided by the invention, valuable chemical components such as silicon and aluminum which are rich in the coal gangue can be efficiently recycled, resource recycling of wastes is promoted in an assisting manner, and the source of high-performance inorganic materials is expanded.

Disclosed is a zirconium- and cerium-based mixed oxide composition exhibiting high reducibility, a method for preparing the same, and uses thereof in the field of catalysis.

The invention relates to the development made in the vertical kiln subject to the application numbered 2021 / 012627, which is designed to be used in calcination and / or drying processes in industrial plants operating in the mining sector.

A hydrogenation catalyst contains a hydrogenation catalyst carrier and an active hydrogenation component. The active hydrogenation component includes a Group VIB metal sulfide and a Group VIII metal compound, and the molar proportion of a substance of the Group VIII metal compound that interacts with the Group VIB metal sulfide to the total amount of the Group VIII metal compound is 60-100%. The hydrogenation catalyst has a higher active metal sulfurizing degree and a higher number of type II active centers, and can be applied to the hydrogenation treatment process of oil products such as distillate oils and residual oils.

A process for calcining aluminium trihydrate (Al2O3.3H2O) to form alumina (Al2O3) replaces at least a part of a natural gas energy source for generating heat for use in a calciner with an electrical energy source. The process may comprise using at least one electrically-heated fluidized bed reactor for calcining aluminium trihydrate.

A method for producing a synthetic fuel from hydrogen and carbon dioxide comprises extracting hydrogen molecules from hydrogen compounds in a hydrogen feedstock to produce a hydrogen-containing fluid stream; extracting carbon dioxide molecules from a dilute gaseous mixture in a carbon dioxide feedstock to produce a carbon dioxide containing fluid stream; and processing the hydrogen and carbon dioxide containing fluid streams to produce a synthetic fuel. At least some thermal energy and / or material used for at least one of the steps of extracting hydrogen molecules, extracting carbon dioxide molecules, and processing the hydrogen and carbon dioxide containing fluid streams is obtained from thermal energy and / or material produced by another one of the steps of extracting hydrogen molecules, extracting carbon dioxide molecules, and processing the hydrogen and carbon dioxide containing fluid streams.

The invention relates to the technical field of high-temperature acid gas adsorbent preparation, in particular to high-temperature acid gas adsorbent manufacturing equipment and a high-temperature acid gas adsorbent manufacturing process. The high-temperature acid gas adsorbent manufacturing equipment comprises a supporting table, a vibration part is fixedly arranged on the right side of the supporting table, a mixing barrel is fixedly connected to the inner wall of the supporting table, and a fixing plate is fixedly connected to the bottom of the mixing barrel; the top of the mixing cylinder is fixedly connected with a supporting ring, the top of the supporting ring is fixedly connected with a cover plate, the vibration part comprises a supporting plate, and the left side of the supporting plate is fixedly connected with the right side of the supporting table. According to the invention, through the periodic vibration of the cylindrical cam and the L-shaped impact block and the combination of the high-speed stirring plate, the material mixing uniformity is obviously improved, the agglomeration phenomenon is reduced, the porosity of the adsorbent is improved to 60-80%, the cross cleaning sheet scrapes the cylinder wall in real time in the mixing process, the material adhesion caused by high-temperature sintering is prevented, the manual cleaning frequency is reduced, and the production efficiency is improved. And the service life of equipment is prolonged by more than 50%.

The present invention relates to a method for preparing an alumina supported perovskite type oxide composition, to an alumina supported perovskite type oxide composition and to the use of such an alumina supported perovskite type oxide composition in catalytic systems in emission control applications.

The invention discloses a novel mineral-based ozone catalyst filler preparation device and method, the preparation device is advanced and low in energy consumption, and the novel mineral-based ozone catalyst filler prepared by the preparation device has an internal unique three-dimensional microporous structure, a huge specific surface area and excellent ion exchange performance. The main performances of the filler comprise: (1) the specific surface area is high, and a large number of adsorption sites are provided; (2) the ion exchange capacity is excellent, and various unfavorable ions in water can be adsorbed and treated; (3) the mechanical strength is high, and the problem of component loss is well solved; (4) the chemical stability is good, good performance can still be kept in an extreme environment, and secondary pollution is avoided; and (5) the internal static electricity is strong, the self-decomposition of ozone in wastewater can be accelerated, and the concentration of (. OH) generated in water is increased, so that the catalytic ozonation effect is improved, and compared with the current catalyst filler in the market, the catalytic ozonation effect can be improved by 2-3 times.

Provided in the invention are a catalyst for preparing phosgene and a preparation method therefor, and a method for the preparation of phosgene and the comprehensive utilization of energy thereof. The preparation method comprises the following steps: 1) stirring and soaking activated carbon in a modifying solution, then adding dimethyltin dichloride and chromium oxide powders and carrying out a reaction, and then adding a nickel oxide fine powder and ultrasonically oscillating same to prepare a pre-modified activated carbon; 2) drying the pre-modified activated carbon; and 3) heating and calcinating the dried pre-modified activated carbon from step 2) to prepare the catalyst.

Preparation method of a lanthanum ferrite / silver / zinc indium sulfide composite photocatalyst. Includes following steps: dissolving citric acid, an iron-containing compound, and a lanthanum-containing compound in a first dispersant to obtain a first solution; carrying out a hydrothermal reaction on the first solution, prior to washing and drying sequentially, to obtain a first dried sample; calcining the first dried sample to obtain a lanthanum ferrite sample; adding deionized water and a silver nitrate solution in the lanthanum ferrite sample, prior to irradiation under a xenon lamp, and then washing and drying, to obtain a second dried sample; dissolving the second dried sample, zinc chloride, thioacetamide, and indium chloride in a second dispersant to obtain a second solution; and carrying out a hydrothermal reaction on the second solution, prior to washing and drying sequentially to obtain a lanthanum ferrite / silver / zinc indium sulfide composite photocatalyst, which can increase an absorption rate of visible light.

A method and system for preparing lithium carbonate by calcination in a tunnel kiln are disclosed. The method includes: designing and preparing the tunnel kiln; loading raw materials, specifically lithium carbonate raw materials, onto the material car of the tunnel kiln; and calcination heating, heating according to a preset temperature rise curve, controlling the calcination temperature between 870℃ and 920℃. The temperature rise curve is determined using partial differential equations, which describe the temperature changes of the raw materials at different calcination times and in different regions of the tunnel kiln. This application, through an optimized calcination process, enables precise temperature control during calcination, thereby improving the uniformity of calcination temperature, increasing calcination efficiency and thermal energy utilization, reducing energy consumption, improving the product quality of lithium carbonate, and enhancing the reliability and safety of the calcination process.

A sulfur-resistant, high activity methane oxidation catalyst for use in removing methane from gas streams having a concentration of methane by oxidizing the methane. The methane oxidation catalyst is especially useful in processing gas streams that also have a concentration of a sulfur compound. The sulfur-resistant methane oxidation catalyst includes a unique multi-crystalline zirconia as a support for a platinum component and a ruthenium component. The multi-crystalline zirconia contributes to the excellent properties of the catalyst. The platinum and ruthenium components can be included in the methane oxidation catalyst in a specific weight ratio that also contributes to the enhanced properties of the catalyst. The sulfur-resistant methane oxidation catalyst may also include a chloride component that contributes to enhanced properties of the catalyst.

The present disclosure relates to compositions for feedstocks suitable for graphitization. In particular, the present disclosure relates to compositions necessary to produce graphite products having desirable properties using difficult-to-graphitize carbon materials.

A computer-implemented method for predicting one or more parameters of calcinated coke produced by a coke production system includes acquiring data indicative of at least one of one or more feedstock properties, one or more coke heating properties, or one or more coke storage properties, inputting the acquired data into a coke predictive model, and providing by the coke predictive model one or more predicted coke parameters corresponding to a feedstock received by the coke production system and based on the acquired data.

There is provided herein a process for producing metal oxide in a flash calciner, the process comprising: a. pre-heating a metal carbonate particulate stream, prior to the particulate stream being fed into the flash calciner; and, b. calcining the particulate stream in a flash calciner to produce a raw stream comprising metal oxide and a flue gas comprising CO2, wherein at least a portion of the flue gas comprising CO2 produced in step (b) is used to pre-heat the metal carbonate particulate in step (a).

The present disclosure as a whole relates to methods for phase analysis of calcium sulfate materials that can be used to prepare gypsum products. In various aspects, the present disclosure provides methods for providing a computer-implemented system for determining the phase content of a test calcium sulfate material; methods for determining the phase content of a test calcium sulfate material; methods for providing a plaster raw material; and production methods for gypsum products.

The present specification provides a method for preparing a solid electrolyte for a secondary battery, comprising the steps of: (S1) preparing a material composition comprising phosphorus (P) sulfide, a lithium halide and lithium sulfide; (S2) mechanically milling the material composition in a milling container; and (S3) calcining a compound obtained after the milling step, wherein the calcination step (S3) performs purging using gas.

The present disclosure relates to processes for converting saturated polyethylene to at least one olefin product. The process comprises contacting the saturated polyethylene with three or more catalyst components in a reactor, the reactor comprising olefin reactants. The three or more catalyst components include a metathesis catalyst component, an isomerization catalyst component, and a dehydrogenation catalyst component. The contacting causes at least a portion of the saturated polyethylene to undergo a dehydrogenation reaction to form an unsaturated polyethylene, and at least a portion of the unsaturated polyethylene, or a product derived therefrom, to undergo a metathesis reaction and an isomerization reaction to produce an effluent comprising at least the olefinic product.

A preparation method and a use method of a lanthanum ferrite / silver / zinc indium sulfide composite photocatalyst. The preparation method includes the following steps: dissolving citric acid, an iron-containing compound, and a lanthanum-containing compound in a first dispersant to obtain a first solution; carrying out a hydrothermal reaction on the first solution, prior to washing and drying sequentially, to obtain a first dried sample; calcining the first dried sample to obtain a lanthanum ferrite sample; adding deionized water and a silver nitrate solution in the lanthanum ferrite sample, prior to irradiation under a xenon lamp, and then washing and drying, to obtain a second dried sample; dissolving the second dried sample, zinc chloride, thioacetamide, and indium chloride in a second dispersant to obtain a second solution; and carrying out a hydrothermal reaction on the second solution, prior to washing and drying sequentially, to obtain a lanthanum ferrite / silver / zinc indium sulfide composite photocatalyst. The lanthanum ferrite / silver / zinc indium sulfide composite photocatalyst can increase an absorption rate of visible light, and has the advantages of high efficiency, good stability, and no pollution to the environment when used in degradation of dye wastewater.

The present invention provides a catalyst composition having excellent properties for converting sulfur, sulfur compounds, and carbon monoxide contained in a gas stream by catalytic hydrolysis, hydrogenation, and water gas shift reactions. The catalyst comprises a base layer of molybdenum and cobalt and an overlay of molybdenum and cobalt. These metals are present in the catalyst in a certain concentration range and relative weight ratio. The base layer metals are present in the catalyst in a specified range relative to the overlay and total metals. The base layer metals are formed by co-grinding an inorganic oxide with the catalytically active metals molybdenum and cobalt. The co-ground mixture is calcined and then impregnated with overlay molybdenum and overlay cobalt.

A computer-implemented method for predicting one or more parameters of calcinated coke produced by a coke production system includes acquiring data indicative of at least one of one or more feedstock properties, one or more coke heating properties, or one or more coke storage properties, inputting the acquired data into a coke predictive model, and providing by the coke predictive model one or more predicted coke parameters corresponding to a feedstock received by the coke production system and based on the acquired data.

The present disclosure relates generally to processes for phase analysis of calcium sulfate materials useful in making gypsum products. In various aspects, the disclosure provides processes for providing a computer-implemented system for determining a phase content of a test calcium sulfate material; processes for determining the phase content of a test calcium sulfate material; processes for providing stucco feedstocks; and production processes for gypsum products.

A process for treating a material, such as by a calcination or reduction process, is disclosed that includes reacting hydrogen and oxygen in a reaction chamber to produce heat and steam, venting the steam from the reaction chamber, using the heat to treat the material to produce a treated material, and returning at least a portion of the steam vented from the reaction chamber to the process. An apparatus is also disclosed.

The present invention relates to catalysts for producing hydrogen and / or synthesis gas and methods for obtaining the same. More specifically, the present invention describes nickel, molybdenum, and tungsten-based catalysts for the steam reforming process of natural gas or other hydrocarbon streams (refinery gas, propane, butane, naphtha, or any mixture thereof), which exhibit high resistance to deactivation by coke deposition. According to the present invention, the catalyst has NiMoW as its active phase, in bulk form and / or supported on alumina oxide and other high surface area oxide supports, and may contain other promoters. Furthermore, the present invention teaches the preparation of catalysts in which the NiMoW active phase has high activity for the steam reforming reaction of hydrocarbons.

A system for calcining powder material comprising a plurality of vertical reactor tubes, wherein the falling powder is heated around a heating zone by radiation from the external heating wall of the reactor tube, and the calcination process of the powder may be a reaction that releases gas or induces a phase change, and the average velocity of the falling powder particles while passing through the reactor tubes is not more than 1.0 m / s, and the powder material flux in each tube is preferably 0.5-1 kg m -2 ·s -1 The length of the heating zone is in the range of 10 to 35 m.