37 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.

A soldering flux contains a base resin and an activating agent. The soldering flux contains, as the activating agent, an oxygen-containing heterocyclic compound having at least one carboxyl group in a molecule. A solder paste composition contains the abovementioned soldering flux and the solder alloy powder. These enable exhibition of excellent wettability to lead-free metals and plating, irrespective of the type of the metals.

The present invention provides a chromate-free coated metal sheet excellent in corrosion resistance and coating material adhesion and having little affect on environment. The precoated metal sheet of the invention is a coated metal sheet comprising a metal sheet having on at least one surface thereof a film mainly comprising one or both of a metal oxide and a metal hydroxide each using a metal species exclusive of chromium, the precoated metal sheet having one or both of cracks in the film and pits on the underlying sheet and having an organic coat layer on the film.

An antimicrobial exfoliated vermiculite composite material is synthesized by impregnating the interlayers of exfoliated vermiculite through cation exchange and surface absorption with at least one of the following metal species: copper, silver, zinc, and manganese. Alternately, the antimicrobial material is synthesized by impregnating interlayers of unexfoliated vermiculite with said metal species and exfoliating the product thereafter. The metal species can be in ionic state, nanometer particles, and in the form of metal oxides, metal hydroxides, metal nitrides, metal carbides, metal phosphates, metal silicates, metal borides, metal sulfides, metal halides, metal hydrides, metal nitrates, metal carbonates, and metal sulfadiazines. Any mixture of these metal species in the exfoliated vermiculite can provide protection against a broad spectrum of pathogens. This antimicrobial material in any desired form, in whole or as an additive, can effectively self-decontaminate various materials or products as the antimicrobial metal ions slowly diffuse to the surface of the products.

A method for producing a catalyst of the present invention is characterized by sequentially performing the steps of: (i) dipping an end face portion of a carrier structure having a catalytic component carried thereon in an aqueous metal salt solution at a concentration of 2.7 to 3.88 mol / L in terms of mole of the metal; (ii) drying the dipped end face portion; (iii) dipping the dried end face portion again in an aqueous metal salt solution whose metal species is the same as that in the aqueous metal salt solution at a concentration of 2.7 to 3.88 mol / L in terms of mole of the metal; and (iv) performing a calcination treatment to harden the catalytic end face.

Compositions and methods are provided in which magnesium, copper, zinc, and strontium are provided to enhance osteogenesis, improve bone growth, and / or improve bone density. Magnesium, copper, zinc, and strontium are provided in a defined molar ratio providing synergistic effects that permit the use of small amounts of individual metal species, and without the need for supplemental calcium.

The utility model relates to a synthesis of a titania-alumina mixed oxide material and a catalyst carrier of a supported deep hydrodesulfurization catalyst by taking the compound as the carrier. 1)take the tetrabutyl titanate and the aluminum chloride or the pseudo-boehmite as the raw material, prepare the mesoporous mixed oxide material of TiO2-Al2O3 with the sol-gel method, and use the material as the carrier of the diesel oil deep hydrodesulfurization catalyst; 2)use the dipping method by modifying the active metal variety and the dipping method to get highly dispersed supported mesoporous hydrodesulfurization catalyst of TiO2-Al2O3 compound material after baking; in the diesel oil hydrogenation deep desulfurization reaction, the desulfurization capability is good, and the desulfurization rate can reach 99 percent; if the reaction can be operated under a relative relaxative condition, the sulfur in the diesel oil can be desorbed from 1300ppm to below 15 ppm, or from the 430ppm to below 1ppm; the sulfur content in the product can meet the standard of Europe IV.

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 relates to a corrosive agent for dendritic crystal corrosion macroscopic examination, and belongs to the technical field of chemical analysis and detection. The corrosive agent comprises the following components in percentage by mass: 0.01%-1.0% of copper chloride, 0.01%-1.5% of copper nitrate, 0.01%-1.5% of magnesium chloride, 0.01%-3.0% of ferric chloride, 0.01%-2.0% of ferrous chloride, 1.0%-4.0% of hydrochloric acid, 40%-50% of absolute ethyl alcohol and the balance of water. According to the technical scheme, the components of the corrosive agent are optimally selected, so that the detection range of ferrous metal types is widened. The invention further relates to a waste liquid treatment system for the corrosive agent. According to the invention, aiming at the problems that the concentration of hydrochloric acid contained in the corrosive agent is relatively high and hydrochloric acid escapes into air in the corrosion process, an air draft cabinet is designed in a matched manner to pump out hydrochloric acid in air in the corrosion process, so that the respiratory tract of an operator is prevented from being injured; and waste acid generated in the corrosion process is collected in a centralized mode through the integrated treatment box, and waste acid treatment is facilitated.

The invention discloses a method for quasi-continuously synthesizing a single-atom catalyst. The invention encapsulates the metal precursor in the chitosan / sodium lauryl sulfate hydrogel encapsulation through the microcapsule technology, and further pyrolyzes and synthesizes the metal single-atom catalyst. The present invention adopts the pendant drop method in microcapsule technology, which can continuously produce homogeneous microcapsules, thereby realizing the quasi-continuous preparation of single-atom materials. The quasi-continuous synthesis process of the invention solves the problems of poor reproducibility, amplification effect and the like caused by batch synthesis. In addition, the present invention has good expandability, solves the problems of few metal types and low metal content in the prior art, and enriches the research in related fields such as metal single-atom material synthesis methodology.