35 results about "Classes of metals" patented technology

The object of the present invention is to provide a catalyst that is highly active and capable of maintaining its activity for a long period of time even in a high-temperature environment. The present invention is a catalyst including: a porous carrier which is comprised of one kind of or two or more kinds of metal oxides; and catalyst particles which are comprised of precious metals or precious metal oxides and supported on the above porous carrier, characterized in that the catalyst particles include: clustered particles formed by the aggregation of first precious metal atoms; and second precious metal ions bound to the above clustered particles. Preferably, the first precious metal and the second precious metal are different metal species which are selected from the group consisting of platinum, palladium, rhodium, ruthenium, silver, gold, iridium and osmium.

The invention discloses a preparation method of a covalent organic framework material derivative carbon skeleton loaded metallic monatomic composite material. The preparation method comprises the following steps that firstly, a covalent organic framework material is synthesized through a room-temperature solid phase method, then the covalent organic framework material and a transition metal salt are mixed, stirred and dried, and a precursor is obtained; and finally, the precursor is calcinated through an in-situ pyrolysis method under protection of inert gas, and thus a target product is obtained. According to the preparation method, the monatomic catalytic material with high catalytic activity site dispersion and high catalytic stability is successfully constructed, the coverage of the metal types is wide, the cost is low, the operation steps are simple, reaction process conditions are easy to adjust and control, expensive equipment, special raw materials and complex processes are notneeded, and large-scale production can be achieved.

The invention belongs to the class of metal materials. After a supercharged technology is used for a diesel engine, the load born by a crankshaft is improved by 45-67 percent. The fatigue property of ordinary ball iron cannot meet the requirement of service and is replaced by alloy steel. The invention provides an austempering ductile iron (ADI) supercharged diesel engine six-cylinder crankshaft and a production method which both determine chemical constituents, particularly determine the addition of alloying elements, propose definite requirements on the percent of spheroidization and the number of graphite pebbles and also determine the parameter of an isothermal quenching process. After quenching, the deformation of the six-cylinder crankshaft is controlled within a certain range, which is a key measure of the method. A special heat treatment tire for quenching the six-cylinder crankshaft is designed so as to obtain a satisfactory result. The application of a crankshaft fillet rolling technology greatly improves the fatigue property of the six-cylinder crankshaft. The invention makes a pioneering contribution to manufacturing the supercharged diesel engine six-cylinder crankshaft by the ADI and greatly reduces the production cost of the six-cylinder crankshaft.

A new class of metal hydride alloy and processes for forming these alloys is disclosed. The alloys are comprised essentially of organically soluble metal hydrides and single molecular layer type transition metal dichalcogenides. They are produced via a non-metallurgical route in organic solvents under mild conditions. These alloys have exhibited improved qualities in battery applications.

The invention discloses a method for synthesizing a molecular sieve containing a transition metal heteroatom LTL structure. The method is characterized by comprising the following steps: mixing a heteroatom metal source, a coordinating complexing agent, an aluminum source, potassium hydroxide, a silicon source and water according to the atomic molar ratio of (0.001-0.1): (0.1-1.0): (0.04-0.2): (0.7-1.2): 1.0: (12-50), uniformly stirring, then performing crystallization reaction at the temperature of 150-180 DEG C for 24-72h, performing suction filtration and washing on a reaction solution, and then drying at the temperature of 100-200 DEG C to prepare a product, namely the molecular sieve containing the transition metal heteroatom LTL structure. Compared with the prior art, the method has the advantages of simple process, a variety of applicable heteroatom metals, extensive raw material sources and low cost, and can better solve the difficult problem of precipitation of a heteroatom transition metal source under strong alkaline conditions, thereby being a preparation process for synthesizing the molecular sieve containing the transition metal heteroatom LTL structure, which is easy to realize industrial implementation, mild in reaction conditions and environment-friendly.

The invention relates to a class of metal oxide materials with a special microstructure, and a preparation method thereof, and belongs to the field of materials. A purpose of the present invention isto solve the problem of large-scale and low-cost production of high-performance metal oxides for energy storage and catalysis. According to the present invention, a multi-component metal oxide AxMyOz(A represents one or a plurality of elements selected from elements with strong metallicity, M represents one or a plurality of elements selected from transition metal elements or germanium, antimony,indium and other elements with weak metallicity, and O represents oxygen) is used as a raw material, and is subjected to A site element removing through etching with an acidic solution (an aqueous solution or organic solution with a pH value of less than 7) to prepare the metal oxide material, wherein a variety of microstructures such as an amorphous porous material, a mono-dispersed nano-crystalmaterial, a self-assembled nanometer hairball-like material, a porous nano-crystal material, a hollow material, a core-shell structure material and the like can be obtained by controlling experimental conditions. According to the present invention, the method is simple and effective, and does not require complicated post-treatment process, and the product can be widely used in the fields of industrial reaction catalysts or catalyst carriers and new energy.

The invention provides texture corrosion liquid medicine which comprises 3-9 parts of ferric chloride, 4-15 parts of copper chloride, 5-16 parts of the mixture of hydrochloric acid and nitric acid, 3-7 parts of potassium dichromate, 2-4 parts of picric acid, 5-15 parts of a sodium metabisulfite aqueous solution and 30-40 parts of deionized water. The texture corrosion liquid medicine can corrode various kinds of metal and has the good corrosion effect on common steel, high-strength steel, stainless steel and alloy steel, additional high-temperature heating is not needed, and corroded textures are clear and uniform.

The invention discloses a preparing method for a hydrotreating catalyst with the desulfurization activity. The preparing method includes the following steps that 1, a macroporous carrier of a phosphorus-containing aluminum oxide or phosphorus-modified aluminum oxide material is prepared; 2, a porous carrier is soaked with a I-class metallic solution, curing, drying and roasting are conducted, anda catalyst precursor is obtained, and the I-class metallic solution is a NiMo solution containing a Ni element and a Mo element; 3, the catalyst precursor is soaked with a II-class metallic solution containing an organic assistant, then curing and drying are conducted, a roasting process is not required, and a final catalyst is obtained; the II-class metallic solution is a CoMo solution containinga Co element and a Mo element, and the I-class metallic solution and the II-class metallic solution are not simultaneously the NiMo solution or the CoMo solution. The method adopts a metallic-solution step-by-step soaking, and active site combinations with different metal-class combinations and different types are provided, so that the hydrotreating catalyst generates the higher hydrogen desulfurization activity than a traditional pure I-type catalyst and a pure II-type catalyst.

The invention discloses a preparation method of an ammonia borane-metal catalyst composite hydrogen storage material. The preparation method comprises that through magnetron sputtering, metal atoms having catalytic effects are uniformly deposited on a mesoporous material base so that catalyst powder is obtained; the catalyst powder and ammonia borane are mixed uniformly in an anhydrous organic solvent; and the organic solvent is volatilized so that the ammonia borane-metal catalyst composite hydrogen storage material is obtained. The catalyst in the ammonia borane-metal catalyst composite hydrogen storage material has good catalytic effects on a thermolysis hydrogen desorption reaction of ammonia borane so that a hydrogen desorption temperature of ammonia borane is reduced and foreign gas escape can be inhibited effectively and hydrogen desorption dynamic features can be improved. The preparation method adopts simple equipment, and has a fast synthesis speed and a low cost. The ammonia borane-metal catalyst composite hydrogen storage material obtained by the preparation method has good product dispersibility, a wide metal selection range and obvious catalysis performances, can be massively produced easily and has a good application prospect.

The invention discloses a method for quasi-continuous synthesis of a monatomic catalyst. According to the preparation method, a metal precursor is encapsulated in chitosan/lauryl sodium sulfate hydrogel encapsulation through a microcapsule technology, and the metal monatomic catalyst is synthesized through further pyrolysis. According to the preparation method, a hanging drop method in a microcapsule technology is adopted, and the technology can continuously generate homogeneous microcapsules, so that quasi-continuous preparation of the monatomic material is realized. The quasi-continuous synthesis process provided by the invention solves the problems of poor reproducibility, amplification effect and the like caused by batch synthesis. Besides, the method has good expansibility, solves theproblems of few metal types, low metal content and the like in the prior art, and enriches the research in the related fields of metal monatomic material synthesis methodology and the like.

The cathode includes base metal and sleeve press-fitted with the base metal. There are one or two sleeves including inner and outer sleeve. Heating unit is setup inside sleeve i.e. at lower part of base metal, and electronic emission layer is spray-coated on upper part of the base metal. The said electronic emission layer includes two sub layers. Based on main component alkali-earth oxide, two classes of metal powders are doped into the first sub layer. The said one metal powder is Ni powder without reducing power, and the other is W powder having reducing power. Main component of second electronic emission layer is alkali-earth oxide. Comparing with traditional cathode of oxide, the disclosed cathode possesses fine performance under large current for long stable operation.

The invention discloses a kind of SOD simulant coordinated by polycondensed amino acid, and prepares a kind of polycondensed amino acid metal complex-polycondensed ferrous aspartate complex by using amino acid condensate as a ligand and different divalent metal ions in aqueous solution And polycondensed aspartic acid manganese complexes. Firstly, after dissolving polycondensed aspartic acid in ammonia water, add manganese sulfate solution under the condition of adjusting pH to be neutral to reflux reaction to obtain polycondensed aspartic acid manganese complex; add ferrous sulfate and ferrous sulfate under acidic conditions Equimolar hydroxylamine hydrochloride, reflux reaction to obtain polycondensation aspartic acid ferrous complex. The chemical composition and structure of the complex were characterized by elemental analysis and infrared spectroscopy, and its catalytic O ₂ ^・- SOD-like activity for disproportionation reactions. The SOD simulant of the invention has the characteristics of moderate molecular weight, good water solubility, non-toxicity, high activity, etc., and has broad application prospects.

The present invention provides a method for selectively producing an alcohol by efficiently hydrogenating a lactone. The present invention is a method for producing an alcohol, the method including hydrogenating a substrate lactone represented by Formula (1), in the presence of a catalyst described below, to produce an alcohol that is represented by Formula (2).

In the formulae, R represents a divalent hydrocarbon group which may have a hydroxyl group.

The catalyst comprises:

• • metal species including M₁ and M₂; and
  • a support supporting the metal species, and
  • wherein
  • M₁ is rhodium, platinum, ruthenium, iridium, or palladium;
  • M₂ is tin, vanadium, molybdenum, tungsten, or rhenium; and
  • the support is hydroxyapatite, fluorapatite, hydrotalcite, or ZrO₂.

The invention relates to a method for detecting metal ions in an aqueous solution based on the refractive index change rate, and belongs to the heavy metal detection technology. The method comprises the following steps: (1) drawing a refractive index-salt concentration curve of a plurality of metal salt standard solutions to obtain refractive index change rate Deltan of each metal salt solution, namely a series of Deltan corresponding to the plurality of metal salt standard solutions; (2) taking a to-be-detected aqueous solution sample, and detecting the content of soluble substances by taking g/L as a unit; and (3) drawing a refractive index-salt concentration curve of a to-be-detected aqueous solution sample to obtain a refractive index change rate Deltan(s) of the to-be-detected sample; and (4) matching the Deltan(s) with a series of Deltan obtained in the step (1), so that the matched metal types in the metal salt standard solution are the metal types in the to-be-detected aqueous solution sample, and qualitative detection is realized. The detection requirements under sudden or emergency conditions can be met in a targeted manner.