125results about "Calcination" patented technology

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 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.

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.

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.

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.

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.

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.

Embodiments herein relate to a system 100 that for example may be used for calcination of lime mud. The system may comprise an input 102, a media separated heat exchanger 104, an injection arrangement 106, an electrically heated calcination reactor 108, configured to convert input material received by means of said injection arrangement 106 into calcination process products comprising a solid compound in the form of calcium oxide and a gas in the form of carbon dioxide, a heat recovery arrangement 116 configured to receive said calcination process products, to extract heat from said calcination process products and transfer said extracted heat to said input material in said media separated heat exchanger 104 and one or more separators 112, 118 configured to separate said solid compound in the form of calcium oxide and gas in the form of carbon dioxide. Different parts of the system 100 are exemplified in embodiments herein.

Provided herein are a method for producing a hydrocarbon adsorption catalyst includes dealuminated zeolite by heat-treating a zeolite in moisture-containing air at a first temperature to remove a portion of aluminum included in the zeolite, and supporting a metal on a carrier including the zeolite after the heat-treating and a hydrocarbon adsorption catalyst prepared using the same method. The metal-supported support may be additionally heat-treated in moisture-containing air at a second temperature that is higher than the first temperature.

To provide a silica carrier exhibiting high activity and selectivity when a catalytic component is supported thereon. The method for producing the silica carrier includes kneading fumed silica obtained by a combustion method, silica gel obtained by a gel method, and colloidal silica obtained by a sol-gel method or a water glass method, molding the resulting kneaded product, and calcining the resulting molded body. The silica carrier has, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less.

Methods of preparing and using alkane dehydrogenation catalysts are provided. The method for making an alkane dehydrogenation catalyst may include mixing a plurality of aluminum hydroxides, a chromium (III) oxide source, and an alkali metal oxide source with an aqueous metal free acid solution to form a moldable mixture. The plurality of aluminum hydroxides may contain from about 60 wt.% to about 99 wt.% of crystalline aluminum trihydroxide and from about 1 wt.% to about 40 wt.% of crystalline aluminum oxide-hydroxide or gelatinous aluminum hydroxide, or combinations thereof. The method may further include extruding the moldable mixture to form extrudates and drying and calcining the extrudates to produce the alkane dehydrogenation catalyst.

Methods of making a hydraulic cement are provided. Aspects of the methods include employing precipitated calcium carbonate (PCC), such as a CO2 sequestering PCC, as a feedstock for lime (CaO) production. Also provided are hydraulic cements and concretes produced by methods of embodiments of the invention, as well as products produced therefrom. In addition, systems for practicing methods of embodiments of the invention are provided.

To provide a catalyst that ensures high yield of target products such as α,β-unsaturated aldehydes and α,β-unsaturated carboxylic acids.SOLUTION: A catalyst containing at least molybdenum, wherein the COD (chemical oxygen demand) of the catalyst is more than 300 ppm and less than 11000 ppm.SELECTED DRAWING: None

A composite of aluminosilicate zeolite-hydrogenation metal component-alumina, and preparation and use thereof are provided. The composite contains an aluminosilicate zeolite, alumina and a hydrogenation metal component. At least a portion of the aluminosilicate zeolite in the composite is chemically bonded to at least portion of the alumina, such that the composite has an infrared spectrum exhibiting a characteristic peak within a range of 860-900 cm−1. When the hydroalkylation catalyst based on the composite is used in the hydroalkylation reaction of benzene to prepare cyclohexylbenzene, the excessive hydrogenation of benzene caused by too long diffusion path can be avoided, the selectivity of cyclohexane as a byproduct can be reduced, the utilization rate of benzene can be improved, and the energy consumption of reaction and separation can be reduced.

A petroleum coke processing apparatus, processing method and processing system, the processing apparatus including an activation unit which is a ring furnace reactor, the processing system including a first reactor, the processing apparatus used as a second reactor, a washing and separation unit, a cooling unit, a melting and separation unit, a washing and drying unit, optionally a regeneration unit, optionally a drying and roasting unit, and optionally an evaporative crystallization unit. Also provided is a method for producing carbon materials using the processing system for processing petroleum coke.

The invention relates to the cross technical field of new energy materials and waste acid regeneration, and provides a device and method for preparing iron oxide red through pure iron or pure iron gas cutting slag and integrated electromagnetic induction spray roasting-regenerated acid circulation and application, and the method comprises the steps that pure iron or pure iron gas cutting slag is added into a regenerated hydrochloric acid solution, filtering is conducted after the operation is finished, the concentration of Fe < 3 + > is adjusted to 180-220 g / L, HCl is adjusted to 5-8 wt%, and a mixed solution is obtained; 0.1-0.3 wt% of a dispersing agent is added into the adjusted solution, then spraying and oxygen reaction are carried out, iron oxide red and hydrogen chloride are generated, the temperature ranges from 550 DEG C to 650 DEG C, the pressure ranges from-300 Pa to-600 Pa, the oxygen content ranges from 5 vol% to 10 vol%, and the reaction time ranges from 3 s to 8 s; spraying hydrogen chloride through desalted water to form regenerated hydrochloric acid and returning to the first step. The method not only solves the problem of low additional value of existing pure iron gas cutting slag treatment, but also solves the problem of low purity of iron oxide red caused by a traditional method for preparing iron oxide red.

The present invention relates to a catalytic article comprising a substrate and a catalytic composition disposed on the substrate, the catalytic composition comprising a support material on which one or more platinum group metals (PGMs) and a Ta-polyoxometalate (POM) are supported.

The invention discloses a preparation method of a red mud oxygen carrier based on multistage gradient synergistic activation and application of the red mud oxygen carrier in chemical looping gasification. The preparation method of the red mud oxygen carrier comprises the following steps: by taking red mud produced by a Bayer process aluminum oxide process as a raw material, firstly carrying out layered gradient pretreatment on the red mud raw material, then carrying out multi-stage temperature control calcination activation, and finally carrying out functional modification, thereby obtaining the red mud oxygen carrier. The red mud oxygen carrier provided by the invention is used for removing nitrogen, sulfur and chlorine pollutants by chemical chain gasification of colored paint on the surface of the pop can, so that not only can efficient thermal removal of an aluminum-based waste material organic coating be realized, but also harmful gas generated in the gasification process is adsorbed and neutralized by using active components in the red mud; the technical problem of harmful gas emission in a traditional thermal paint removal process is solved from the source, and a green paint removal technical support is provided for high-value regeneration of aluminum-based waste materials.

The disclosure provides a process for a polyol dehydration, including: providing a feedstock containing a polyol, and dehydrating the polyol in the presence of a solid alumina composition as a catalyst or catalyst support for the dehydration reaction to obtain a dehydration product; wherein the solid alumina composition is prepared from a precursor composition comprising an alumina hydroxide (Al(OH)3), aluminum oxyhydroxide (AlO(OH)), or a mixture thereof.

Provided in the present invention are a system and method for using industrial waste gas and industrial waste brine to prepare soda ash. The system comprises a waste liquid pipe, a waste gas pipe, an ammonia gas pipe, a heat exchanger, an oxidation reaction tower, a dust removal tower, a preliminary carbonization reaction tower and a deep carbonization reaction tower; an outlet of the waste liquid pipe is connected to the oxidation reaction tower, the heat exchanger being arranged on the waste liquid pipe; an oxidation product generated in the waste liquid pipe is conveyed to the preliminary carbonization reaction tower by means of a first conveying pipe; the waste gas pipe is connected to the dust removal tower by means of the heat exchanger, a dust removal product obtained in the waste gas pipe being conveyed to the preliminary carbonization reaction tower by means of a second conveying pipe; the ammonia gas pipe is connected to the preliminary carbonization reaction tower; an outlet at the bottom of the preliminary carbonization reaction tower is connected to a third conveying pipe, an outlet of the third conveying pipe being connected to the deep carbonization reaction tower. The system realizes a carbon-negative, green, and low-energy-consumption environmentally-friendly soda ash production process, and meets the industrial production requirement for green and sustainable development.

The present invention aims to provide a catalyst for α,β-unsaturated aldehyde and α,β-unsaturated carboxylic acid, etc. with high selectivity. The problem is solved by a catalyst containing at least molybdenum and bismuth, wherein the ratio of the amount of bismuth atoms to the amount of molybdenum atoms calculated from ICP (inductively coupled high frequency plasma) emission spectroscopy is A, and the ratio of the peak area of bismuth atoms to the peak area of molybdenum atoms measured by X-ray photoelectron spectroscopy is B, and B / A is 1.3 to 5.

The present disclosure relates to methods for preparing alumina-supported perovskite oxide compositions, alumina-supported perovskite oxide compositions, and the use of said alumina-supported perovskite oxide compositions in catalyst systems for emission control applications.

The carbonaceous material that is activated to form the precursor activated carbon is further improved by doping with copper and nitrogen and calcination. The resulting adsorbent has excellent catalytic properties that are useful in the field of fluid purification.

The present application relates to the technical field of SCR denitration catalyst production, in particular to a kind of SCR denitration catalyst production device, comprising: continuous calcination space, the operation of the calcination space has base plate, the base plate is designed with variable tray, the variable tray can support honeycomb cuboid calcination object;Slidingly assembled on the base plate assembly frame, the assembly frame can be displaced towards the honeycomb end of calcination object, a plurality of flow guide tubes corresponding to the honeycomb inner hole of calcination object are rotationally designed on the assembly frame, a plurality of air holes are designed on the outer wall of the flow guide tube, and both ends of the flow guide tube are open;Switching mechanism with two modes of convection and rotary spraying, the present application can make high-temperature gas accurately pass through the honeycomb inner hole of calcination object, so that high-temperature gas can form convection in the honeycomb inner hole, reduce the uneven heating condition, and also can spray high-temperature gas containing calcination atmosphere, improve the calcination quality of honeycomb inner hole.

There is provided a cyclone reactor design, wherein the reactor comprises an upper part with a first smaller diameter (D1) and a first height (L2), a middle part with a second diameter (D2), and a lower part with a third smaller diameter (D3) and a third height (L4), wherein the directions upper, middle and lower are in relation to the direction of gravity force, wherein the second diameter (D2) is at least 1.25 times larger than the first smaller diameter (D1) and wherein the second diameter (D2) is at least 1.25 times larger than the third smaller diameter (D3), wherein the angles α1 and α2 are in the interval 20°-65°, and wherein the reactor comprises at least one plasma torch, at least one inlet and at least one outlet. Advantages include that the reactor has efficient energy transfer to particles and allows for a compact design.

A method for selectively hydrogenating gasoline containing polyunsaturated compounds and light sulfur compounds is disclosed, wherein gasoline and hydrogen are contacted together with a catalyst comprising a Group VIB metal, a Group VIII metal, and a mesoporous-macroporous alumina matrix having a bimodal mesoporous pore distribution, wherein: - the volume of mesopores having a diameter greater than or equal to 2 nm and less than 18 nm is equivalent to 10-30% by volume of the total pore volume of the matrix; - the volume of mesopores having a diameter greater than or equal to 18 nm and less than 50 nm is equivalent to 30-50% by volume of the total pore volume of the matrix; - the volume of macropores having a diameter greater than or equal to 50 nm and less than 8000 nm is equivalent to 30-50% by volume of the total pore volume of the matrix.

The invention relates to a method and device for preparing a chemical looping combustion oxygen carrier by using vanadium-titanium blast furnace slag titanium extraction tailings, and the method comprises the following steps: S1, sequentially carrying out first screening and dechlorination on the vanadium-titanium blast furnace slag titanium extraction tailings to obtain a first material; s2, crushing the first material obtained in the step S1 to obtain a second material; s3, mixing the second material obtained in the step S2, an active filler and a binder, and performing fluidized bed granulation to obtain a third material; s4, the third material obtained in the step S3 is subjected to second screening and calcination in sequence, and the chemical looping combustion oxygen carrier is obtained. According to the method, the titanium extraction tailings of the vanadium-titanium blast furnace slag are used as a substance for transferring oxygen in the chemical looping combustion process, the problem of heavy metal pollution caused by waste of the titanium extraction tailings of the vanadium-titanium blast furnace slag is solved, and resource utilization and environmental protection are achieved.