67results about "Calcination" patented technology

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 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 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.

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 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 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.

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.

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.

This invention relates to the field of industrial kiln technology and discloses an automated device and method for preparing rare earth oxides by calcining rare earth carbonates. The device includes a base with a segmented heat treatment mechanism mounted on it. The segmented heat treatment mechanism includes an annular heat insulation cover positioned above the base and open at one end. A preheating zone is located at one end of the inner side of the annular heat insulation cover, and a calcining zone is located at the other end. A heat-conducting box is installed inside the calcining zone, and a heat exchanger is installed in the preheating zone. A running mechanism is mounted on the base. This invention, through the segmented heat treatment mechanism in conjunction with the running mechanism, can introduce the high-temperature flue gas generated during calcination into the preheating zone, allowing the material to absorb a large amount of residual heat before entering the calcining zone. This significantly shortens the time required for the material to reach the process temperature, greatly reduces fuel consumption, and improves overall thermal efficiency. Simultaneously, the synergistic design of the annular conveying channel and the double-carrying plate improves production continuity.

The present disclosure relates to the technical field of lithium batteries. Provided in the present disclosure are a roasting furnace, a system for preparing a lithium battery oxide precursor, and a lithium battery material precursor and a preparation method therefor and the use thereof. By means of atomization feeding at the bottom of the roasting furnace, after a reaction is conducted in the roasting furnace from bottom to top, a product is output from a particle outlet in the top via negative pressure at the top of the furnace. Since a gas carries the product out from the top of the furnace, the present disclosure, compared with a device that discharges materials from the bottom thereof, achieves long residence time at a pyrolysis temperature, which is beneficial for improving the crystallinity of the product, and the particles are output from the top of the furnace along with the gas, such that the blockage of an atomizer due to the flowing of the particles can be prevented, and the operation stability of the device is improved. In addition, the roasting furnace provided by the present disclosure can further adjust the residence time by adjusting and controlling the negative pressure; and compared with traditional feeding and discharging modes, the temperature of a lower area in the roasting furnace is easier to control, and accurate temperature control, energy conservation and consumption reduction are facilitated.

The invention discloses a preparation system of a high-hole denitration catalyst, belongs to the technical field of denitration catalysts, and solves the problems that in the prior art, the preparation amount is small, heating is not uniform, and high-temperature gas cannot be rapidly sprayed into honeycomb inner holes. Comprising a base plate, an annular sliding way is arranged on the periphery of the base plate, a positioning beam is fixed to the periphery of the annular sliding way, and a main positioning lug is arranged at the top end of the positioning beam; a main driving gear and a main driven gear which are meshed with each other are arranged on the end face of the main positioning lug. High-temperature hot air or a calcining atmosphere is introduced into a plurality of honeycomb catalyst inner holes by utilizing the gas shunting device, so that warm gas is quickly sprayed to the honeycomb inner holes, the processing preparation amount of the catalyst is effectively improved, and the high-temperature hot air or the calcining atmosphere is uniformly guided to the honeycomb inner holes through the gas shunting assembly, so that uniform conveying of a heat source is ensured.

The invention relates to an apparatus and a method for synthesizing silicon carbide. The device for synthesizing silicon carbide comprises a crucible, the crucible comprises an outer ring side wall and an inner ring side wall, and the outer ring side wall and the inner ring side wall are used for limiting a reaction cavity; the first heater is arranged on the outer side of the outer ring side wall; and the second heater is arranged on the inner side of the inner ring side wall. According to the device, raw materials in the reaction cavity can be heated internally and externally.

The invention discloses granulation forming equipment and a method for manufacturing sandy silicon dioxide by using the granulation forming equipment, and belongs to the field of new material synthesis. The invention aims to solve the problems of high energy consumption, pollution, particle damage and the like in a crushing link in the traditional sandy silicon dioxide production, and provides a novel granulation forming device and process. The preparation method comprises the following steps: mixing sol and an accelerant to prepare wet gel, carrying out solvent removal and aging control under the protection of an inert atmosphere, and utilizing granulation equipment made of a high-purity quartz material to realize primary crushing, atomized water vapor assisted cracking and rounded forming of gel particles. And finally, roasting to obtain the sandy silicon dioxide with a closed pore structure, low hydroxyl content, high purity and excellent circularity. According to the method, the wet gel preparation and granulation technology is optimized, the traditional crushing and rounding process is avoided, the material purity and yield are remarkably improved, and a new way is provided for efficient and environment-friendly industrial production of the high-purity sandy silicon dioxide.

A circulating fluidized bed (CFB) furnace (3) for heating and / or calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is disclosed. A process for calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is further disclosed.

A method of producing a support, and supported catalyst, the method comprising: (a) combining a porous inorganic oxide catalyst carrier or carrier extrudate with an aqueous solution, dispersion or suspension comprising: (i) a boron-containing source; and (ii) an organic compound or organic chelating agent selected from organic compounds comprising at least two oxygen atoms and 2-10 carbon atoms; (b) calcining the composition (a) to reduce its Loss on Ignition (LOI) volatiles content to greater than 0 wt % to less than about 5 wt %; (c) impregnating the calcined composition an aqueous composition comprising at least one each of a Group VIB and Group VIIIB metal-containing source; and (d) calcining, to reduce its LOI volatiles content greater than 0 wt % to less than about 30 wt %; wherein the boron content of a supported catalyst is in the range of about 1 wt % to about 13 wt B2O3 based on the total weight of the catalyst.

The invention relates to the technical field of industrial kilns, and discloses an automatic device for preparing rare earth oxide through firing of rare earth carbonate salt and a using method.The automatic device comprises a base, a segmented heat treatment mechanism is arranged on the base, and the segmented heat treatment mechanism comprises an annular heat insulation cover which is arranged above the base and provided with an opening in one end; a preheating area is arranged at one end of the inner side of the annular heat shield, a roasting area is arranged at the other end of the inner side of the annular heat shield, and a heat conduction box is installed in the roasting area. And an operating mechanism is arranged on the base. According to the invention, the segmented heat treatment mechanism is matched with the operation mechanism, so that high-temperature flue gas generated by firing can be introduced into the preheating area, and materials absorb a large amount of waste heat before entering the roasting area, so that the time required for the materials to reach the process temperature is remarkably shortened, the fuel consumption is greatly reduced, and the overall heat efficiency is improved; meanwhile, by means of the collaborative design of the annular conveying channel and the double material carrying plates, the production continuity is improved.

The present disclosure relates to a technical field of preparation of zeolite molecular sieve catalysts, and in particular relates to a preparation method of a metal oxide loaded nano zeolite particle catalyst. In the preparation method, industrial γ-alumina balls are treated with a quaternary ammonium alkali solution, then pretreated γ-alumina balls are mixed with a zeolite precursor solution and are hydrothermally crystallized. Then a two-step high-temperature heat treatment is performed to obtain an alumina loaded zeolite nano particle material, solving problems of large zeolite dosage and poor dispersion in hydrocracking catalysts. Finally, the metal oxide loaded nano zeolite particle catalyst is obtained by combining transition metals. Nano zeolite particles prepared regulate a surface acidity of alumina, and exfoliated zeolites may be used independently as a catalyst, which saves cost and improves a utilization of the zeolites.

A process for producing a porous alpha-alumina catalyst support, comprising i) preparing a precursor material; ii) forming the precursor material into shaped bodies; and iii) calcining the shaped bodies to obtain the porous alpha-alumina catalyst support. The catalyst support has a high overall pore volume, thus allowing for impregnation with a high amount of silver, while keeping its surface area sufficiently large so as to provide optimal dispersion of catalytically active species. The invention further relates to a shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene. Also described is a process for preparing a shaped catalyst body as described above comprising impregnating a porous alpha-alumina catalyst support obtained in the process described above with a silver impregnation solution; and b) subjecting the impregnated porous alpha-alumina support to a heat treatment.

A process for the selective hydrogenation of gasoline containing polyunsaturated compounds and light sulfur compounds is disclosed, in which the gasoline, together with hydrogen, is contacted with a catalyst comprising a Group VIB metal, a Group VIII metal, and a mesoporous and macroporous alumina support having a bimodal mesopore distribution: the volume of mesopores having a diameter of 2 nm or more and less than 18 nm corresponds to between 10 and 30 volume % of the total pore volume of the support; the volume of mesopores having a diameter of 18 nm or more and less than 50 nm corresponds to between 30 and 50 volume % of the total pore volume of the support; and the volume of macropores having a diameter of 50 nm or more and less than 8000 nm corresponds to between 30 and 50 volume % of the total pore volume of the support.

A three-way catalyst for reduced palladium loading is provided. The catalyst includes an inert substrate and a palladium catalyst material coating the substrate. The palladium catalyst material includes a support material formed from one of 10% CeO2 / Al2O3, 20% CeO2-Al2O3 (20CeAlOy), 30% CeO2-Al2O3 (30CeAlOy), Al2O3, and MOx-Al2O3, wherein M is one of copper, iron, manganese, titanium, zirconium, magnesium, strontium, and barium. The palladium catalyst material includes a layer of CeO2 material disposed upon the support material, wherein the layer of CeO2 material is dispersed on a surface of the support material. The palladium catalyst material includes an active component including a layer of praseodymium oxide particles dispersed across the surface of the layer of CeO2 material and a layer of palladium particles disposed upon and dispersed across the surface of the layer of CeO2 material at locations each corresponding to a respective location of each of the praseodymium particles.

The invention provides a system for preparing sodium carbonate based on a dynamic ceramic membrane reactor, which efficiently prepares sodium carbonate and ammonium sulfate through a process route of pre-filtration, mass transfer reaction / solid-liquid separation, freezing desalination and magnetic adsorption purification. According to the invention, a dynamic ceramic membrane system is used as a reactor, industrial wastes (high-concentration CO2 waste gas and industrial byproduct mirabilite) are used as raw materials, and a dynamic ceramic membrane coupling reaction-separation system is used for replacing a traditional carbonization tower, so that a green chemical production technology with high process integration, closed circulation of substances and high product purification is realized. Solution of mirabilite, carbonization of ammonia water, crystallization of sodium bicarbonate and primary separation are integrated in an efficient and controllable membrane system to be synergistically completed, so that the efficiency is greatly improved, the occupied area of equipment is reduced, and the excellent quality of a combined product is ensured through multi-stage purification.

Provided is a reaction device that can be prevented from becoming unable to operate normally, even when the reaction vessel deforms due to thermal expansion or thermal contraction. A reaction device (10A) comprises: a cylindrical reaction vessel (100) that includes an intermediate section (A3) between a supply section and a delivery section; a temperature control unit that controls the temperature of the intermediate section; the supply section; the delivery section; a transport mechanism that transports the processed matter from the supply section side to the delivery section side through the intermediate section; a first support part (103) that supports one end side of the reaction vessel in a fixed state; and a second support part (104) that supports the other end side of the reaction vessel to be movable in the axial direction of the reaction vessel, wherein the temperature control unit controls the temperature rise rate or the temperature fall rate of the intermediate part so that the actual displacement rate of a specific part (E) of the reaction vessel follows the desired displacement rate of the specific part of the reaction vessel.A reaction apparatus capable of preventing a situation in which a reaction vessel cannot normally operate due to deformation of the reaction vessel because of thermal expansion or thermal contraction thereof is provided. A reaction apparatus (10A) includes: a cylindrical reaction vessel (100) including an intermediate part (A3) between a supply part and a delivery part; a temperature control unit configured to control a temperature of the intermediate part; the supply part and the delivery part; a conveyance mechanism configured to convey the substance to be treated from a side of the reaction vessel close to the supply part to a side of the reaction vessel close to the delivery part through the intermediate part; a first support part (103) configured to support one end side of the reaction vessel in a state in which the one end side of the reaction vessel is fixed; and a second support part (104) configured to support another end side of the reaction vessel in such a way that the other end side of the reaction vessel is movable in an axial direction of the reaction vessel, in which the temperature control unit controls a temperature increase rate or a temperature decrease rate of the intermediate part in such a way that an actual displacement rate of a specific part (E) of the reaction vessel follows a desirable displacement rate of the specific part of the reaction vessel.

The invention provides an iron oxide powder roasting furnace and a method for producing low-chlorine low-moisture iron oxide powder. The iron oxide powder roasting furnace comprises a furnace body, a first heating assembly and a second heating assembly. A furnace chamber is formed in the furnace body; the first heating assembly supplies heat to the furnace chamber at the first heating position, and the second heating assembly supplies heat to the furnace chamber at the second heating position; the first heating position is located between the top and the middle of the furnace chamber, and the second heating position is located between the middle and the bottom of the furnace chamber; a first reaction area is formed between the first heating position and the top of the furnace chamber; a second reaction zone is formed between the second heating position and the bottom of the furnace chamber, and an intermediate reaction zone is formed between the first reaction zone and the second reaction zone; the first reaction zone has ascending airflow in the roasting process, and the second reaction zone has descending airflow in the roasting process. The low-chlorine low-moisture iron oxide powder can be obtained, the problem that the chlorine content of the iron oxide powder exceeds the standard is solved, the moisture of the iron oxide powder is reduced, and the specific surface area of the iron oxide powder is increased.