200 results about "Magnesium hydride" patented technology

The present invention provides a nano composite hydrogen storage material. It is a mixture obtained by mixing 90 wt%-99 wt% of magnesium hydride and 1 wt%-10 wt% of nano carbon. Its preparation method includes the following steps: mixing nano carbon into magnesium hydride according to the required ratio, under the atmosphere of argon gas or hydrogen gas mechanically ball-grinding for 30 min-100 hr, then making desorption; or ball-grinding magnesium hydride for 1-100 hr, then adding nano carbon and ball-grinding for 30 min-10 hr, then making desorption. Its hydrogen storage capacity is 4.5 wt%-6.7 wt%.

A composite hydrogen-bearing material used for the hydrogen fuel battery is prepared from Mg or magnesium hydride powder and the powdered oxide of transition metal through proportional mixing and high-energy ball grinding in H2 or Ar gas for 10-50 hr.

The invention relates to energy-saving manufacturing of purified hydrogenated titanium powders or alloying titanium hydride powders, by metallo-thermic reduction of titanium chlorides, including their hydrogenation, vacuum separation of titanium hydride sponge block from magnesium and magnesium chlorides, followed by crushing, grinding, and sintering of said block without need for hydrometallurgical treatment of the produced powders.

Methods disclosed contain embodiments of processes for manufacturing high-purity powders and their use in manufacturing near-net shape titanium and titanium-alloy articles by sintering titanium hydride and alloyed titanium hydride powders produced from combined hydrogen-magnesium reduction of titanium chlorides, halides and hydrides of other metals. Additional titanium hydride powder introduced with titanium tetrachloride beneficially affects the kinetics of magnesium-thermic reduction due to formation of the additionally-emitted atomic hydrogen, which helps to reduce presence of oxides and so cleans inter-particle interfaces of the product and enhances diffusion between all of components of the powder mixture.

The invention belongs to the technical field of explosive preparation, in particular to a magnesium hydride type hydrogen-stored emulsion explosive. The components comprise an emulsion base and a sensitized material, wherein the sensitized material is magnesium hydride; the mass of the magnesium hydride takes up 0.2-6% of the total mass of the emulsion explosive; the magnesium hydride is powders with purity not smaller than 95%. The added magnesium hydride is uniformly distributed in the emulsion base such that a part of magnesium hydride has a chemical reaction with water in the emulsion base, and a little amount of hydrogen is released, and foaming effect is performed on the emulsion base, and the detonator sensitivity is improved. When the emulsion base of the mixed magnesium hydride is initiated, the hydrogen bubbles under the function of shock waves produced in emulsion base detonation generate detonation reaction, and at the same time, the rest magnesium hydride quickly releaseshydrogen under the denotation waves of the emulsion base, and the hydrogen joins the detonation reaction of the emulsion base such that the emulsion explosive has characteristics of a high output shock wave peak value, a high impulse and a high energy. The detonation energy of the emulsion explosive is better than that of the common emulsion explosive.

The invention discloses a calcium-magnesium hydrogen producing agent, of which the main component is a hydrogen producing agent. The hydrogen producing agent is selected from one or various combination of calcium hydride, magnesium hydride, calcium hydroxide magnesium, magnesium-magnesium hydride, calcium-calcium hydride, magnesium-calcium hydride, calcium-magnesium hydride, calcium-magnesium-magnesium hydride, calcium-magnesium-calcium hydride, calcium-magnesium-magnesium hydride-calcium hydride, coral calcium hydroxide magnesium, Na MgH3, and Mg2FeH6. the calcium-magnesium hydrogen producing agent can be added into water, beverage or wine as an additive, or can be coated on the surface of skin or taken as soaking liquid to remove internal or surface active oxygen. The calcium-magnesium hydrogen producing agent has a remarkable prompting effect for recovering various oxidized damages, relieving discomfort caused by drinking, diluting stain and wrinkle of the skin, recovering skin elasticity, and delaying senescence.

The invention discloses a solid-phase synthesis method of a Mg(BH4)2 hydrogen storage material. Magnesium boride or a mixture of magnesium boride and magnesium hydride is used as a starting material to carry out a mechanochemical reaction in high pressure hydrogen atmosphere, with a catalyst selected from one or more of a transition metal, a transition metal halide, a transition metal hydride and a transition metal oxide, so as to prepare the Mg(BH4)2. The preparation method of the Mg(BH4)2 hydrogen storage material of the invention has advantages of simple synthetic method, easily controlled reaction process, low cost and no organic pollution.

The invention relates to a method for preparing alkali borohydride, in particular to a method for preparing sodium borohydride by a chemical mechanical mechanics method and solving the problems of environmental pollution, severe operation condition and the like during the preparation process of the sodium borohdride in the prior art. The method takes magnesium hydride as a hydrogen source, takes borax as a boron source and prepares the sodium borohydride by combining mechanical grinding with chemical reaction. In the hydrogen atmosphere, under a certain temperature and pressure, the magnesium powder is mechanically grinded and generates hydrogenation reaction with the hydrogen, thus preparing magnesium hydride; subsequently, the borax, sodium carbonate and magnesium hydride are arranged in a ball mill with a certain proportion; certain hydrogen pressure, ball material ratio and grinding time are kept, thus obtaining the sodium borohydride. The purity of the sodium borohydride prepared by the method can achieve more than 97%. The chemical mechanical mechanics method is adopted to prepare the sodium borohydride, and compared with the currently general Schlesinger method and Baeyer method, the method has the advantages of low raw material cost, simple, convenient and safe process, no pollution and the like.

This invention relates to a method for preparing Mg-based hydrogen-storage material, especially a method for rapidly preparing hydride. The method comprises: (1) loading pure Mg powder into a reactor, and partially hydriding Mg at 473-723 K and 1-6 MPa hydrogen pressure for 2-12 h; (2) ball-milling the obtained MgH2 for 30 min-12 h; (3) re-loading into the reactor, performing desorption/adsorption of hydrogen to completely convert the material into MgH2 in a short time. The method has such advantages as simple process, no need for any additive, high sample purity, and low hydride cost. The prepared MgH2 has excellent hydrogen-storage performance and good mechanical properties. The hydrogen discharge amount is 2.3-4.5 wt. %. After second hydriding, the purity of MgH2 is higher than 95%. This invention provides a new route to prepare practible Mg-based hydrogen-storage material.

The invention relates to a magnesium hydride based composite powder. The magnesium hydride based composite powder is prepared by taking nano Mg powder as a base material. The quality percentage contents of the metal particles and the metal oxide particles in the mixture are as follows: Mg powder accounts for 95-99%, the metal particles account for 0.5%-4.0% and the metal oxide particles account for 0.5%-4.0%. The metal particles are one or more of manganese, iron, cobalt, nickel and copper. The metal oxide particles are one or more of manganese oxide, iron oxide, cobalt oxide, nickel oxide and copper oxide. Nano crystal hydrogenated magnesium composite powder is obtained by filling the mixture through hydrogen filling ball-milling in a ball grinder. The invention has the advantages of reasonable composition, simple preparation process, low cost, hydrogen storage performance and remarkably dynamics property, is used for hydrolyzing for producing hydrogen, and has better water quality adaptability and temperature adaptability; and a hydrolysis product is safe and non-toxic so as to be environmental-friendly.

Hydrogen energy systems for obtaining hydrogen gas from a solid storage medium using controlled laser beams. Also disclosed are systems for charging/recharging magnesium with hydrogen to obtain magnesium hydride. Other relatively safe systems assisting storage, transport and use (as in vehicles) of such solid storage mediums are disclosed.

The invention discloses a magnesium base hydride composite system for hydrolysis hydrogen production and a preparation method and application thereof. The composite system is prepared by a method comprising the following steps of: taking magnesium powder and nickel powder in a mole ratio of 30:1-49:1; performing hydrogenation combustion synthesis under the action of a catalyst and an organic dispersant which account for 3 to 10 percent of the total weight of the mixture of the magnesium powder and the nickel powder; and performing strong mechanical ball milling. The magnesium hydride in the prepared magnesium base hydride composite system for the hydrolysis hydrogen production accounts for 95 to 98 percent of the weight of hydride, and the magnesium nickel hydride accounts for 2 to 5 percent; the catalyst is one of graphite, B, Al, La, Ca, V, Ce and Nb; the magnesium hydride is MgH2; and the magnesium nickel hydride is a mixture of Mg2NiH4 and Mg2NiH0.3 in any ratio. The theoretical hydrogen production amount of the composite system is up to 1,600 ml/g, and a preparation process of the magnesium base hydride composite system is time-saving, energy-saving and simple and is easy for industrial production.

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a preparation method of a metal oxide composite magnesium hydride hydrogen storage material. Themethod comprises the steps that magnesium hydride serves as a base material, metal oxide particles are mixed, the mass percentage content of metal oxide in the mixture is 1%-8%, and the mixture is subjected to hydrogen filling ball milling in a ball mill to obtain the metal oxide composite magnesium hydride hydrogen storage material. By adding the nanoscale metal oxide particles, the hydrogenation speed of the magnesium-based composite powder in the hydrogen charging ball milling process can be increased, and reduction of the particle size of magnesium hydride is facilitated; the nanocrystalline MgH2 is coated with the metal oxide to form a core-shell structure with an excellent synergistic effect, the core-shell structure has a good catalytic effect and remarkable dynamic performance, the hydrogen storage reaction speed can be improved, microcell heat release can be controlled, agglomeration of a hydrogen storage reactant Mg (OH) 2 can be effectively eliminated through the metal oxide, and the hydrogen storage efficiency is improved. Therefore, the purpose of sufficient hydrolysis reaction is achieved.

The invention discloses a method for synthesizing lithium borohydride. The method aims at solving the problems that an existing method for preparing lithium borohydride is complex in technology, strict in synthesis condition and the like. The method comprises the following steps that in a protective atmosphere, after lithium hydride, magnesium diboride and a catalyst are mixed according to a ratio, ball-milling treatment is conducted, and a product is obtained after ball-milling treatment; a hydrogen absorption reaction is conducted on the product which is obtained after ball-milling treatment, so that a mixture of the lithium borohydride and magnesium hydride is obtained and is recorded as a reaction product; the magnesium hydride and the lithium borohydride in the reaction product are separated, so that the lithium borohydride is obtained. The method overcomes the shortages that a traditional method for preparing the lithium borohydride is complex in technology and strict in synthesis condition and the purity of the product is low and the like. The method is simple, gentle in reaction condition and short in reaction time. Synthesized LiBH4 is high in yield and purity. Meanwhile, through the method, the production period of the LiBH4 can be shortened, the production cost is reduced, the lithium borohydride can be produced in a large scale industrially, and application of the lithium borohydride is facilitated.

The invention relates to the technical field of hydrogen production, and in particular, relates to a hydrogen production device with magnesium hydride as a hydrogen storage material, wherein the hydrogen production device includes a reaction chamber; a massive magnesium hydride filler layer is arranged in the reaction chamber. Provided is a hydrogen production method with magnesium hydride as thehydrogen storage material; massive magnesium hydride is prepared by mixing and pressing MgH2 and other chemical substances (M), the MgH2/M ratio is 10 wt.%-80 wt.%, and the massive magnesium hydride is shaped as particles or cakes, wherein the particles are spheres or irregular spheres with the diameter of 1-50 mm, and the cakes are round cakes or cakes with other shapes with the bottom diameter or side length of 1-100 mm and the height of 1-50 mm. The massive magnesium hydride is stacked and filled in the reaction chamber, the void between the particles becomes larger and the energy density of the filler increases so as to be conducive to full contact reaction of water vapor to all parts of the filler to produce hydrogen with high efficiency. At the same time, hydrogen gas escapes from the filler more smoothly to prevent the sudden increase of the pressure in the reaction chamber. The start-up time of reaction is shortened by adding a reaction promoter, and the quality of hydrogen gasis improved by adding a gas purifier.

The invention discloses a rotary kiln and a poly-generation system utilizing the rotary kiln for producing metal hydride. The poly-generation system comprises a lime production sub-system, a pulverized coal production sub-system, a calcium carbide production sub-system, a magnesium metal production sub-system, a waste heat utilizing and gas recycling sub-system, a metal hydrogen storage sub-system and a cement clinker production subsystem. Limestone, magnesite/dolomite, quartz sand and coal serve as raw materials, and the limestone is roasted into lime; in a lime kiln built through zirconia bricks, the lime and the coke powder are subjected to the high-temperature reaction so that liquid calcium carbide can be obtained; the magnesite/dolomite is roasted into magnesium oxide, and the calcium carbide, the magnesium oxide and the quartz sand are mixed to generate magnesium; high-concentration carbon dioxide, coal pyrolysis gas and calcium carbide tail gas obtained through decomposing of the limestone and the magnesite are recycled and processed, and hydrogen and food-level carbon dioxide are obtained; magnesium hydride is generated through union of hydrogen and magnesium; and carbide slag and magnesium slag are processed, and cement clinker and carbon powder are obtained. According to the poly-generation system, emission of solid waste is avoided, and carbon emission is greatly reduced.

The invention belongs to the technical field of magnesium hydride hydrogen production, and particularly relates to application of magnesium hydride hydrogen production assistants, a magnesium hydridehydrogen production mixed reagent and a method for preparing hydrogen from magnesium hydride. According to the application of the magnesium hydride hydrogen production assistants, the magnesium hydride hydrogen production mixed reagent and the method for preparing the hydrogen from the magnesium hydride, one or the mixture of more of the magnesium hydride hydrogen production assistants is taken asan assistant for preparing the hydrogen from the magnesium hydride, wherein the magnesium hydride hydrogen production assistants are matter of which the dissolution enthalpy is less than zero; further, the magnesium hydride hydrogen production assistants are salt of which the dissolution enthalpy is less than zero, or the magnesium hydride hydrogen production assistants are alkali metal hydroxides of which the dissolution enthalpy is less than zero; 0-20 parts by weight of the assistant for preparing the hydrogen from the magnesium hydride and MgH2 form the magnesium hydride hydrogen production mixed reagent. The method has the advantages that the technological process is simple, the cost is low, the starting time is short, the hydrogen preparation efficiency is high, environmental protection and no pollution are achieved, and the batch production is easy.

The invention discloses a micro-nano magnesium hydride antibacterial and anti-inflammatory wound dressing. The wound dressing comprises an effective antibacterial and anti-inflammatory component magnesium hydride MgH2 micro-nano powder, an auxiliary material and a dressing matrix, and magnesium hydride micro-nano powder is uniformly loaded and coated on the surface and/or inside the dressing matrix. The magnesium hydride micro-nano powder absorbs moisture immediately when encountering a wound exudate, reacts and is converted into micro-nano magnesium hydroxide particles, meanwhile, local alkalinity is caused, and the magnesium hydride micro-nano powder has broad-spectrum bactericidal activity without illumination induction and good biocompatibility. Meanwhile, hydrogen released by the reaction has non-toxic and anti-inflammatory characteristics and has a certain effect of preventing wound adhesion. The dressing is convenient to store and use, safe, environment-friendly, antibacterial,anti-inflammatory and anti-infection, and is beneficial to wound repair.

The invention belongs to the technical field of hydrogen storage materials and particularly relates to a metal oxide and porous material composite hydrogen storage material and a preparation method thereof. The metal oxide and porous material composite hydrogen storage material is formed by compounding magnesium hydride, a porous material and a metal oxide, and the weight ratio of the magnesium hydride to the porous material to the metal oxide is (100-10): (5-0.1): (1-0.05). The magnesium hydride is taken as a base material, and metal oxide particles are mixed and grinded to obtain an activated magnesium hydride material; and the obtained activated magnesium hydride material is mixed with the porous material, and ball milling or compression is carried out to obtain the composite hydrogen storage material. According to the material and the preparation method, nanoscale metal oxide particles are added and compounded with the porous material, so that the hydrogenation speed of magnesium-based composite powder in the hydrogen charging ball milling process can be increased, and meanwhile, the hydrogen storage material has good characteristics in the aspects of hydrogen adsorption and desorption kinetics in combination with the properties such as excellent pore channels and high surface area of the porous material.

The invention relates to a preparation method of an in-situ growth nano magnesium hydride loaded high specific surface material. An alkali metal hydride, magnesium halide and a support material are utilized for in situ synthesis of the material under a ball milling condition. The invention has the technical effects that: magnesium hydride is generated in situ on the support material surface through replacement reaction, the nano-composite hydrogen storage material with low operating temperature and fast hydrogen absorption and desorption rate is prepared under a mild condition, the problems of harsh preparation conditions, large product particle size and the like in previous nano magnesium hydride preparation, and the thermodynamic and dynamic performance of the magnesium hydride hydrogen storage material can be improved.