Abstract: A system for generating hydrogen gas utilizes a volume exchange housing for the storage of a fuel material that reacts to generate hydrogen gas and a hydrogen separation chamber. The system includes a gas permeable membrane or membranes that allow hydrogen gas to pass through the membrane while preventing aqueous solutions from passing therethrough. The system is orientation independent. A throttle valve is also used to self regulate the reaction generating the hydrogen gas.

Abstract: A pressurization device is for a flexible enclosure disposable within an environment having air at a pressure and configured to define an interior chamber having a sufficient volume to entirely contain at least one person and containing air. The device includes a gas generator configured to generate and release a gas into the enclosure chamber such that the enclosure air pressure is increased or maintained above the environment air pressure to prevent entry of environment air into the enclosure chamber. The generator is preferably configured to generate the gas by a chemical reaction, and preferably includes a quantity of at least one reactant, such as sodium nitrate, sulfuric acid or ammonium chloride, and initiates chemical reaction of the reactant to generate the gas. Furthermore, the pressurization device is preferably incorporated into an air treatment system including an oxygen generator that generates and discharges oxygen into the enclosure chamber.

Abstract: A self-regulating on-demand gas generator. Generation of gas produced from a reaction is selectively, variably, and spontaneously controlled. A variable volume liquid chamber in communication with the pressure pot allows the volume of liquid reactant in the pressure pot to be varied. The amount of product gas generated in the pressure pot depends on the degree of contact between the solid-like reactant and the liquid reactant. The pressure of the product gas regulates the level of liquid in the pressure pot and thereby regulates the degree of contact between the solid-like reactant and the liquid reactant. A sealed gas chamber sharing a flexible diaphragm with the liquid chamber controls the expandability of the liquid chamber. Manipulating the pressure in the sealed gas chamber or the volume of the liquid reactant affects the pressure at which contact by the reactants will be initiated or terminated and thereby provides the ability to control the reaction.

Abstract: Autoclaves with combined airflow to provide controllable heating or cooling of parts being processed are disclosed. Gas flow along the autoclave is provided in one or more duct areas (48,52), with a plurality of duct valves (50) along the duct (48,52) controllably diverting the gas into the working area of the autoclave. In a fully configured autoclave, duct valves (50) divert gas flowing from the fan or blower (38) from the ceiling, sides and floor of an autoclave to provide a controllable, three dimensional, air flow in the working area of the autoclave. Control of the duct valves (50) may be manual or automatic, with individual or ganged duct valve control. Computer control based on temperature sensor on parts in the working area of the autoclave may be used to provide uniform heating or cooling, or intentional non-uniform heating or cooling rates. Various embodiments are disclosed.

Abstract: A novel chlorine dioxide production apparatus, or reactor, is disclosed. The reactor receives reactants from two or more feed pipes under pressure, and the reactants react in a reaction chamber that operates under elevated pressure and within a specified temperature range. A gaseous product, such as chlorine dioxide, is generated and is released directly into a liquid stream for bleaching, disinfection, and other purposes. Also disclosed is a novel system for production of quantities of chlorine compounds from commercial grades of starting materials, and methods of using the reactor in situ for bleaching, and for disinfection, decontamination, and sterilization of flows of water or other liquids. An automated system for multiple points of addition of chlorine dioxide to a flow to be treated is also disclosed.

Abstract: A first heat treatment is carried out in which a material powder comprising magnesium is kept in the atmosphere of hydrogen gas and the temperature and pressure in the atmosphere of hydrogen gas are maintained in the temperature-pressure region in which single Mg and H2 coexist in a thermodynamically stable state, whereby the coating on the surface of the material powder is removed. Next, a second heat treatment is carried out in which the temperature and pressure in the atmosphere of hydrogen gas are changed and maintained in the temperature-pressure region in which MgH2 exists in a thermodynamically stable state. Hence, Mg from which the coating is removed reacts promptly with H2, and MgH2 is produced at high yield. Magnesium-based hydrides containing high purity MgH2 can thus be obtained by supplying energy less than that required for the related art that requires an activation treatment.

Abstract: Mixing baths 6A and 6B which temporarily hold chemical agents A and B respectively are disposed. The mixing baths 6A and 6B are each connected with a high-pressure fluid supplying unit 2. For surface treatment using a mixture of the chemical agent A and SCF (processing fluid), SCF is fed under pressure from the high-pressure fluid supplying unit 2 to the mixing bath 6A which already holds the chemical agent A, whereby the chemical agent A dissolves in SCF flowing into the mixing bath 6A and the mixture of the chemical agent A and SCF (processing fluid) is created. As a high-pressure valve (processing fluid introducing valve) 39 is opened, the processing fluid is sent into a pressure vessel 1. This achieves a predetermined surface treatment of a substrate which has been set inside the pressure vessel 1, using the processing fluid.

Abstract: Apparatus and methods for removing malodor from the air, particularly from confined spaces are disclosed. Such devices and methods are useful for example for storing and preserving food in closed compartments such as refrigerators. The apparatus and methods utilize baking soda as the odor removing substance, either alone, or in combination with another odor removing substance, which may include activated carbon. In one embodiment, the apparatus has a detachable cartridge member which contains baking soda. In one version of this embodiment, the detachable cartridge member is used with an air moving member that draws air through the detachable cartridge member. In one embodiment, the method involves using a detachable cartridge member with an air moving member in one confined space, and using another cartridge member without the air moving member in another compartment of the confined space.

Abstract: The invention concerns a fast systemic method for low-temperature (athermal) sanitizing in confined chamber, under modified atmosphere, in turbulent conditions by combined production of a highly germicidal ionic chain acting simultaneously on the hydric flux (water) and the aeraulic flux (air), operating under controlled temperature, for killing pathogenic germs and toxins.

Abstract: A nebulant suitable for sterilization comprising finely divided liquid droplets suspended in a gas, said droplets including a solute, which is advantageously hydrogen peroxide and a solvent, for example water, wherein the droplets have a concentration of greater than 60 wt % of solute and an average diameter of less than 1.0 micron, preferably less than 0.8 microns.

Abstract: Methods and apparatus are disclosed for mixing fluid streams of different compositions to minimize fluid condensation inside a mixing vessel where the objective is to produce an all-vapor mixture product.

Abstract: A parallel reactor system including a reactor and vessels in the reactor for holding reaction mixtures, and a cannula for introducing fluid reaction material into the vessels. A robot system is operable to insert the cannula into cannula passages in the reactor for delivery of reaction materials, including condensed gases, to respective vessels, and to withdraw the cannula from the cannula passages after delivery. Related methods are also disclosed.

Abstract: A hydrogen reforming system includes a cyclical compression chamber having an entry port for receiving hydrogen-containing gas and an exit port for delivering reformed hydrogen-containing gas, an arrangement for heating the hydrogen-containing gas to a non-combustible temperature, and a drive system for cycling the cyclical compression chamber. The cyclical compression chamber has an operational cycle with an internal pressure and temperature absent combustion effective for reforming the hydrogen-containing gas.

Abstract: A system and method for producing molybdenum oxide(s) from molybdenum sulfide are disclosed. The system includes a pressure leach vessel, a solid-liquid separation stage coupled to the pressure leach vessel, a solvent-extraction stage coupled to the solid-liquid separation stage, and a base stripping stage coupled to the solvent-extraction stage. The method includes providing a molybdenum sulfide feed, subjecting the feed to a pressure leach process, subjecting pressure leach process discharge to a solid-liquid separation process to produce a discharge liquid stream and a discharge solids stream, and subjecting the discharge liquid stream to a solvent extraction and a base strip process.

Abstract: Methods and apparatus for production and use of carbon-isotope monoxide in labeling synthesis are provided. The resultant carbon-isotope labeled reagents are useful as radiopharmaceuticals, especially for use in Positron Emission Tomography (PET).

Abstract: A system for processing supercritical and subcritical fluid capable of bringing the inside of at least one processing container (1) formed in a flow passage into a supercritical or subcritical high pressure field, wherein thermal operation is applied to process fluid to apply thermal expansion to the fluid to produce a pressure difference between the processing container (1) and the outside, whereby a specified temperature and the high pressure field suitable for the processing of the supercritical or subcritical fluid can be provided in the processing container (1).

Abstract: A treatment apparatus for organic waste including a reaction vessel for introducing and decomposing organic waste and pulling out decomposed organic waste as a treated fluid. The reaction vessel includes an internal vessel made of corrosion-resistant material, an external vessel made of pressure-resistant material provided for surrounding the internal vessel via a gap, and an interconnection pipe for interconnecting the gap and the internal vessel outside the external vessel, thereby to control inside the gap and inside the internal vessel to practically equal pressure. The internal vessel has a heating zone for heating the introduced organic waste to a temperature higher than a critical point of water, a reaction zone for holding and decomposing the organic waste at a temperature higher than the critical point of water, and a cooling zone for cooling the treated fluid containing a decomposition product of the organic waste to lower than 100° C.

Abstract: A diamond sintered body conventionally used in a cutting tool or the like includes an iron group metal element as a sintering aid, and therefore has a problem in heat resistance. A diamond sintered body not including the iron group metal, on the other hand, does not have sufficient mechanical strength to be used as a tool material, and also does not have conductivity, which makes electrical discharge machining impossible, and thus processing thereof is difficult. A diamond polycrystalline body having high heat resistance and mechanical strength and having conductivity enabling electrical discharge machining is obtained by using only an amorphous or fine graphite-type carbon material as a starting material, adding boron thereto and concurrently performing conversion into diamond and sintering in an ultra-high pressure and temperature condition.

Abstract: The present invention relates to a method for the continuous mixing of at least one polyol component and at least one isocyanate component and optionally additives to form a polyurethane reaction mixture in a stirrer mixer with an axially conveying stirrer.

Abstract: A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without affecting the properties of the core materials through process steps benign to the environment in super- or sub-critical water compositions under the conditions of a temperature of 300° C. or more and a pressure of 20 MPa. The core magnetic material is subsequently recycled for forming carrier. This method may also be useful for processing waste including magnetic materials with silicone resin coating.

Abstract: A reactor comprising a reacting vessel 31 that contains a fluid including high temperature and high pressure water under target reaction temperature and reaction pressure condition and performs a reaction treatment to a reactant by the fluid, a first pipe 25 connected to the reacting vessel 31 to supply the reactant to the reacting vessel 31, and a first partition means 50 for partitioning between first pipe 25 and the reacting vessel 31 so as to prevent a leakage of any one of the fluid, the reactant, and a reaction product from the reacting vessel 31 side to the first pipe 25 side. The first partition means 50 is comprised of for example a valve 51, a shaft 52, a weight 53, a supporting member 54, and a pipe 55, and normally, due to the weight 53, the valve 51 closes an opening of a bottom end of the pipe 55. That is, it isolates the pipe 55 and the inside of the reacting vessel 31.

Abstract: Method for producing fatty acid methyl ester, including compounding saturated and unsaturated higher fatty substances from at least one of vegetable and animal with an alkaline solution dissolved in alcohol to form a mixture. The method also includes emulsifying the mixture to reach a chemical balance state in a reaction section, wherein fats are transesterified into fatty acid methyl ester, wherein border surfaces of the mixture are enlarged by dynamic turbulence in the reaction section and the transesterification is performed under pressure, and wherein the pressure is reduced during transesterification. The method further includes after reaching a chemical balance state, separating residues from the fatty acid methyl ester in a phase separation section. Apparatus for producing fatty acid methyl ester.

Abstract: An appliance for the gasification of carbon- and ash-containing fuel, residual and waste materials using an oxygen-containing oxidizing agent at temperatures above the melting point of the inorganic fractions, in a reaction chamber which is designed as an entrained-bed reactor, at pressures between atmospheric pressure and 80 bar, preferably between atmospheric pressure and 30 bar, the contour of the reaction chamber being delimited by a cooled reactor wall. The cooled reactor wall having the following structure, from the outside inward: a pressure shell, a cooling wall, a water-cooled gap between the pressure shell and the cooling wall, a ceramic protection for the cooling wall, and a layer of slag. The pressure and temperature of the cooling gap between the pressure shell and the cooling wall is controlled in such a way that it can be operated above and below the boiling point of the cooling water. The pressure in the cooling gap is higher than the pressure in the gasification chamber.

Abstract: A gas siphon type reactor (10) is used to carry out a three phase chemical reaction under pressure, such as the reduction of uranyl nitrate to uranous nitrate by hydrogen, in the presence of a catalyst made up of platinum on a silica carrier. The control of the pressure in the reactor (10) is provided by regulating the liquid and gas flow rates from separator (52), into which the liquid and the gas leaving the reactor (10) are routed. The liquid in the reactor (10) is tapped from a lateral branch pipe (32) fitted with a filter (36) and emerging in the upper area (30), behind a profiled wall (34).

Abstract: A reaction vessel which includes internally placed temperature controlling mixing baffles in which liquid is boiled, resulting in an isothermal heat sink. The energy of vaporization is supplied by the reaction vessel contents. The vapor produced by the boiling is directed to channel coils which surround the outside of the reaction vessel wall. The channel coils contact the outside wall of the reaction vessel perpendicularly, and provide mechanical support for the reaction vessel. The mechanical support from the channel coils allows for a decrease in the thickness of the reaction vessel wall and corresponding increased heat transfer efficiency between the channel coil contents and the reaction vessel contents. The entire above described apparatus is enclosed within an evacuated shell to provide additional insulation.

Abstract: A reactor for fluorinating an organic compound comprising (a) an outer vessel; (b) a reactor vessel being disposed within said outer vessel to define an annular space, said reactor vessel at least partially comprising a fluoropolymer, said annular space being adapted to receive a fluid; (c) at least one pathway for introducing said heating fluid into said annular space; (d) at least one pathway for inputing reaction materials into said reactor vessel; and (e) at least one pathway for ouputing a product stream from said reactor vessel.

Abstract: A dynamic sealing structure for pressure vessels used in microwave assisted chemistry is disclosed. The structure includes a cylindrical vessel liner and a removable liner cap, each formed of a microwave transparent material. The liner has a circular mouth with a lip formed of respective first and second beveled edges, with the first beveled edge forming an interior edge of the circular mouth and the second beveled edge forming an exterior edge of the circular mouth. The cap includes respective interior and exterior faces, with a sleeve depending from the interior face and having a circumference that engages the interior surface of the vessel liner for being urged under pressure against the interior surface of the vessel liner. The interior face of the cap comprising a circular channel outward of the sleeve and having a circumference that engages the lip of the vessel liner, and with the channel comprising two beveled edges that respectively engage both beveled edges of the lip of the liner.

Abstract: A method for making gas hydrate comprising generating ultrafine bubbles in an aqueous solution; and spontaneously generating hydrate nuclei by self-compression and collapsing of the ultrafine bubbles.

Abstract: A caustic recovery system comprising an oxygen source adapted to provide a gas stream comprising at least 30% oxygen. A method of regenerating caustic comprising intermingling spent caustic with a gas stream comprising at least 30% oxygen.

Abstract: In the apparatus for liquid preparation, the silver halide emulsion contained in a dedicated pot is transferred as liquid by a mohno pump via a piping into a measuring tank. The silver halide emulsion transferred into the measuring tank is measured with a load cell and is melted by heating with a jacket while being stirred by a stirrer. Accordingly, even when a small amount is used as in the case of the silver halide emulsion used in the heat-developable photosensitive material, the time for heating the silver halide emulsion, within the time range from the liquid preparation of the silver halide emulsion to its utilization, can be made short to the utmost, and hence the time elapse in melt can be suppressed. Thus, the time elapse in melt, reagent loss, and mutual contamination in the liquid preparation of photographic reagents can be effectively prevented.

Abstract: A high-pressure treatment apparatus comprises a first solid reservoir, a second solid reservoir connected to the first solid reservoir through a first connecting pipe, a high-pressure reactor connected to the second solid reservoir through a second connecting pipe, means for feeding reaction medium into the high-pressure reactor, a first sealing unit and a second sealing unit intervened respectively in the first connecting pipe and second connecting pipe, a first fluid feed unit for feeding a first fluid between the first sealing unit and the second sealing unit, a second fluid feed unit for feeding a second fluid between the second sealing unit and the high-pressure reactor, and means for opening the second sealing unit at the time of shut-off of the first sealing unit and controlling the first fluid and the second fluid to form a pressure-gradient so that pressure between the first sealing unit and the second sealing unit and pressure between the second sealing unit and the high-pressure reactor decrease gr

Abstract: In a process for the production of urea, substantially pure ammonia and carbon dioxide are reacted in a reaction space (1) from which comes out a reaction mixture subjected to stripping (2) to obtain a partially purified mixture sent to a urea recovery section (3, 4, 7, 8). From the recovery section (3, 4, 7, 8) it is obtained a dilute carbamate solution, which is subjected to stripping (9) with recycling of vapors to the reaction space (1) after condensation (6). This process achieves high conversion yield with reduced energy consumption and low implementation costs.

Abstract: A chemical processing apparatus is disclosed. The apparatus includes a pressure vessel and a microreactor disposed within the pressure vessel. The pressure vessel is constructed and arranged to maintain the pressure vessel and the microreactor at elevated pressure when a chemical operation is performed within the apparatus. A method of operating a microreactor at high pressure is also disclosed.

Abstract: A hydrogen storing and desorbing apparatus is adapted to store hydrogen by a hydrogen storage material and desorb the stored hydrogen from a hydrogen storage material. The hydrogen storing and desorbing apparatus comprises a pressure-proof vessel (2), a cartridge (3) having an outside diameter smaller than the inside diameter of the pressure-proof vessel and an outer peripheral wall part (3a) and a bottom wall part (3b) made of a porous material and capable of providing a carbonaceous material therein, legs (6) for holding the cartridge (3) in the pressure-proof vessel (2) so that the bottom wall part is spaced from the bottom surface (2b) of the pressure-proof vessel (2) and the outer peripheral wall part is spaced from the inner side surface (2a) of the pressure-proof vessel (2), gas passages (11a) and (11b) connected to the pressure-proof vessel (2), valves (12a) and (12b) provided in the gas passages and a hydrogen gas supply source (14) connected to the pressure-proof vessel (2) by the gas passage.

Abstract: The invention relates to a high-pressure reactor which has a hydraulically controlled pressure-relief valve. The mechanical design of the corresponding hydraulic system in combination with the control technology used facilitates particularly fast opening of the pressure-relief valve in the case of pressure or temperature jumps in the high-pressure reactor.

Abstract: An inflation device for an aircraft emergency evacuation slide or other inflatable device produces a greater number of moles of gas than the number of moles of gas stored. This is accomplished by selecting the stored inflation gas to be one of a family of gases capable of undergoing a thermal decomposition, such as nitrous oxide, such that two moles of nitrous oxide are decomposed to form two moles of diatomic nitrogen and a mole of diatomic oxygen. Because the universal gas constant is the same for all gases, the three moles of nitrogen and oxygen produced by the decomposition of two moles of nitrous oxide occupy 50% more volume than the two moles of nitrous oxide would have occupied at the same temperature and pressure. By decomposing the stored nitrous oxide, the inflator is capable of inflating a device that is 50% larger than would be possible using un-decomposed gas.

Abstract: The invention relates to a device 51 for closing a plurality of digestion vessels 1 the openings of which are in each case covered by a cover 3, comprising a plurality of positioning spaces 53 for the digestion vessels, the positioning spaces 53 being able to be distributed in a circumferential row R1 and being accessible from outside, and a plurality of closing devices 73 for pressing the covers 3 against the vessels. In order to improve the capacity of the device 51 with regard to the number of digestion vessels 1 further inner positioning spaces 53 are arranged to be offset inwardly with respect to said positioning spaces 53.

Abstract: A pressure-measuring vessel system for microwave assisted chemical processes is disclosed. The vessel system includes a pressure resistant vessel that is otherwise transparent to microwave radiation, a pressure-resistant closure for the mouth of the vessel, with portions of the closure including a pressure resistant synthetic membrane, a pressure transducer external to the vessel, and a tube extending from the transducer, through the membrane and into the vessel for permitting the pressure inside the vessel to be applied against the transducer while the closure and membrane otherwise maintain the pressure resistant characteristics of the vessel.

Abstract: This invention relates to pollution control requirements for fossil fuel burning facilities such as power plants, and, more particularly, to an apparatus for providing a safe and economical supply of ammonia, from a urea feedstock, when ammonia is desired or necessary to initiate, cause and/or supplement the removal of one or more pollutants from an exhaust gas stream.

Abstract: This invention relates to apparatus particularly a monolith catalytic reactor in a stirred tank reactor.

Abstract: The present invention provides a PCB decomposing apparatus capable of decomposing PCB efficiently. The PCB decomposing apparatus comprises a PCB extracting container for extracting PCB from a PCB-containing material with an organic solvent. A distilling tower provided on the downstream side of the PCB extracting container distills the organic solvent to separate the PCB. A primary reactor provided on the downstream side of the distilling tower includes a nozzle for supplying aqueous Na2CO3 solution and a nozzle for supplying an oxidizing agent into the container. A liquid cyclone provided on the downstream side of the primary reactor can remove Na2CO3 having a large particle size. A secondary reactor formed by a long pipe is connected to the liquid cyclone. A gas-liquid separator provided on the further downstream side of the secondary reactor can separate a gas from a solution.

Abstract: An improved process for the causticisation of Bayer liquors in an alumina refinery, the process including the steps of reacting lime with aluminate ions in a Bayer liquor within a primary reactor under controlled conditions of low to moderate temperature (between 70-80° C.) and agitation, to form substantially only a hydrocalumite species and hydroxyl ions; and a secondary reactor wherein the hydrocalumite species formed is subjected to heating in contact with a Bayer liquor under controlled conditions so as to cause the hydrocalumite species to react with the liquor to form calcium carbonate, aluminate ions and hydroxyl ions, whereby a causticised Bayer liquor is obtained and wherein the efficiency of lime utilization is substantially increased and/or alumina losses are minimized.

Abstract: An apparatus safely fills and empties a pressurized vessel charged with flammable and/or reactive gas. The apparatus features an upper flap combination, an intermediate lock vessel having a flushing apparatus, and a lower flap combination. The present invention also relates to a pressurized reactor which is charged with flammable and/or reactive gas and is equipped with a filling lock apparatus and an emptying lock apparatus for the simultaneous preparation of tetrachlorosilane, trichlorosilane and hydrogen. In addition, the present invention relates to a special process for filling and emptying such a reactor.

Abstract: The invention relates to a method and a system for automatically injecting chemicals into a pressurized system.

Abstract: The present invention refers to an apparatus for carrying out wet chemical reactions under pressure comprising a pressure sure vessel in which a reaction liquid can be provided and which is adapted to be sealed in a pressure-tight manner by closure means. When the reaction liquid is heated, the pressure in the interior of the pressure vessel will increase; the stressability limit of the pressure vessel must, however, not be exceeded. The total pressure in the interior is composed of the partial pressures of the reaction liquid and of the reaction products. The reaction liquid must be maintained at so low a temperature that the sum of the partial pressures of the reaction liquid and of the gaseous reaction products does not exceed the maximum load value of the pressure vessel. For achieving a wet chemical reaction which is as fast and as efficient as possible, the highest possible temperature of the reaction liquid is, however, required.

Abstract: A gas generation system includes a reservoir for a reactant used in a gas generation, a compressor configured to pressurize the reactant in the reservoir using an operating medium delivered into the reservoir, a gas generation component fed with the reactant using a reactant feed line, and a metering element disposed in the reactant feed line between the reservoir and the gas generation component. In addition, a method for operating a gas generation system that includes compressing an operating medium, delivering at least a first portion of the compressed operating medium to a reservoir so as to pressurize a reactant in the reservoir, controlling the delivery of the compressed operating medium so as to maintain a pressure in the reservoir at a level corresponding to a pressure of the reactant downstream from the reservoir, metering the reactant in a feed line between the reservoir and a gas generation component, and delivering the reactant to the gas generation component.

Abstract: An apparatus for loading fibers in a fiber suspension with calcium carbonate has a housing with an inlet and an accept outlet. A rotatable distribution member is positioned within the housing. A rotor and stator assembly is positioned within the housing radially outside of the distribution member. A toothed ring is interposed between the distribution rotor and the rotor and stator assembly. The toothed ring and the rotor and stator assembly define a gas ring therebetween. A reactant gas supply is fluidly coupled with the gas ring.

Abstract: A product carrier for use in pressure processing substances is substantially fluidically closed, and is insulated, to prevent heat transfer from the product being treated to the cooler wall of the pressure vessel. The insulating material has compression heating properties, such that as the product is pressurized, the temperature of the insulation increases as does the temperature of the product and pressure media, thereby helping to prevent heat transfer from the product to the surrounding media and pressure vessel wall.

Abstract: Oxygen is removed from natural gas by contacting oxygen-containing natural gas with nitric oxide under conditions sufficient to produce nitrogen dioxide.

Abstract: A method and an apparatus for preparing aluminum nitride are disclosed. The method includes the steps of (a) providing an aluminum container, (b) providing a reactant to be received in the aluminum container, and proceeding at least one step selected from a group consisting of step (b1), step (b2) and a combination thereof, (c) placing the aluminum container into a reactor with a specific pressure and introducing nitrogen gas into the reactor, and (d) heating the reactant at a specific temperature till igniting, thereby preparing the aluminum nitride. The step (b1) is placing a layer of an aluminum nitride powder between the reactant and the aluminum container, and the step (b2) is perpendicularly placing at least one aluminum pipe into the reactant.