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1266results about How to "Simple preparation process" patented technology

Nano porous corrosion-resistant heat-insulated coating material taking thixotropic colloid as template agent and preparation method for corrosion-resistant heat-insulated coating material

ActiveCN105315743AAvoid reunion and scatter problemsSimple preparation process
The invention relates to an aqueous nano porous corrosion-resistant heat-insulated coating material and a preparation method for the corrosion-resistant heat-insulated coating material and particularly relates to an aqueous corrosion-resistant heat-insulated coating material, which has a nano porous structure, prepared through forming an aqueous-phase uniform three-dimensional-network nano porous structure by taking thixotropic colloid as a template agent and adding a film forming agent, a reinforcing powder material, a functional powder material and admixtures. The preparation method for the corrosion-resistant heat-insulated coating material, disclosed by the invention, is simple and easy in operation and low in production cost, is environment-friendly and safe and is beneficial to mass production. The nano porous corrosion-resistant heat-insulated coating material disclosed by the invention has excellent heat insulating and corrosion resisting properties and can be applied to the heat insulating and corrosion resisting of equipment such as high-temperature furnace hearths, pipelines and valves in the fields of aerospace and military industries, metallurgical forging, petroleum refining, electric power and the like, so that the safety of use and the level of energy saving and consumption lowering are improved.
Owner:浙江圣润纳米科技有限公司

Sound absorbing material preparation method, sound absorbing material and loudspeaker

ActiveCN105516880ARaw material type and grade requirements are reducedSimple preparation process
The invention discloses a sound absorbing material preparation method, a sound absorbing material and a loudspeaker. The method comprises the following steps of preparing non-foamed material slurry, and mixing uniformly; performing reaction on the non-foamed material to form non-foamed sound absorbing material powder with the FER or MFI structure; performing heteroatom replacement on the non-foamed sound absorbing material powder; adding binder into the modified non-foamed sound absorbing material powder; shaping, drying and calcining the non-foamed sound absorbing material, and thereby obtaining the non-foamed sound absorbing material with a set grain size, wherein the mass ratio of silicon and aluminum in the non-foamed sound absorbing material is less than 200. The sound absorbing material is prepared by the non-foamed material, and the mass ratio of silicon and aluminum in the prepared non-foamed sound absorbing material powder is less than 200. The rear vocal cavity of the loudspeaker is filled with the sound absorbing material provided by the invention. The method is low in requirements on material category and grade and simple in technology; and the material prepared by the method is good in absorbing ability and slow in aging. The loudspeaker has good acoustic effect.
Owner:GOERTEK INC

Other transitional metals doped ferrotitanium composite oxides catalyst for selectively reducing nitrous oxides by ammonia

The invention relates to a catalyst for selectively deoxidizing oxides through ammonia, which mainly solves the problems that in the prior commercial NH3-SCR catalyst system, V2O5-WO3(MoO3)/TiO2 has high operating temperature and a narrow temperature window, N2 has low generation selectivity at high temperature, vanadium as an active composition has toxicity and harmfulness on environment and human body and the like. On the basis of a ferrotitanium composite oxide catalyst prepared in prior period, environment-friendly raw materials with cheap prices are continuously adopted; and other transition metal oxides are added into a ferrotitanium composite oxide catalyst system through a simple and feasible coprecipitation method to prepare a catalyst system with improved low-temperature activity. The catalyst is subjected to physicochemical property characterization by using a plurality of methods to show that an active phase of the catalyst is the same as that of a ferrotitanium composite oxide catalyst which is not doped with other transition metals, and is still in a microcrystal state, thereby forming a composite oxide microcrystal system with a Fe-O-Ti, M-O-Ti and Fe-O-M (M is a doped transition metal element) structure; and the composite oxide microcrystal system has special catalytic activity in SCR reaction. The catalyst has high NH3-SCR activity, selectivity and stability at a middle-low temperature period (between 150 and 300 DEG C), is unobvious in the poisoning effect of SO2; and if the catalyst is prepared into slurry and is coated on a honeycomb ceramic carrier, the catalyst is expected to be applied to the denitration and purification process of flue gas produced after desulfuration and dedusting in a coal-fired power plant or tail gas of a diesel engine.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI

Lactobacillus plantarum strain and application thereof

ActiveCN101724591AStrong growth abilitySimple preparation process
The invention relates to a lactobacillus plantarum strain of which the preservation number is CGMCC No.3166, which can be enriched in a modified MRS liquid culture medium. The lactobacillus plantarum strain is a white colony on an MRS solid culture medium, is straight, short-chained, Gram-positive and atrichous, has homofermentation, does not generate gas when fermenting glucose, generates acetic acid and lactic acid when fermenting ribose, and does not reduce nitrite. In application, the strain is activated and propagated and thalli are collected to form a fermenting agent which can inhibit the growth of amine producing bacteria in the fermenting production of meat products and generate biogenic amine oxidase which oxidizes and degrades tyramine, phenylethylamine, tryptamine and histamine. The invention has the advantages that the lactobacillus plantarum has strong growing ability, the fermenting agent has simple preparation technology and can effectively inhibit the growth and propagation of enterobacteria in the fermenting production of meat products and control the generation of biogenic amine, the generated biogenic amine oxidase can oxidize and degrade the contents of tyramine, phenylethylamine, tryptamine and histamine, and the lactobacillus plantarum strain as the fermenting agent for producing the fermented meat products can effectively reduce the accumulation of the biogenic amine.
Owner:NANJING AGRICULTURAL UNIVERSITY

Preparation method for magnetic biological carbon by one-step synthesis

The invention discloses a preparation method for magnetic biological carbon by one-step synthesis. The preparation method comprises the following steps: air-drying a biomass raw material under a natural condition and then storing for later use, and adding a dried and crushed biomass raw material into a ferric salt solution; slowly stirring a mixed solution, then, regulating a pH (potential of hydrogen) value with an NaOH solution, then, continuously stirring, then, standing until the biomass raw material absorbs the ferric salt solution to reach a saturation state, performing suction filtration to remove free water in the biomass raw material, pyrolyzing a suction filtration-treated biomass raw material in a pyrolyzing furnace to make carbon, and introducing an inert shielding gas into the pyrolyzing furnace to obtain the magnetic biological carbon. According to the preparation method disclosed by the invention, carbonization and magnetization are combined together to synthetize the magnetic biological carbon by one-step pyrolysis; meanwhile, different magnetic biological carbon materials can be obtained by changing the shielding gas (nitrogen or carbon dioxide); an effect of removing typical heavy metal pollutants in a water body is obvious, and moreover, the typical heavy metal pollutants can be separated and recovered from the water body as well so as to protect the environment from secondary pollution.
Owner:HUAZHONG AGRICULTURAL UNIVERSITY

Preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles

The invention provides a preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles. The preparation method comprises steps as follows: preparation of a heteroatom doped graphene-based material: a graphene-based material is subjected to ultrasonic treatment, a heteroatom precursor is added, heteroatom doping is performed in a hydrothermal kettle at the temperature of 150-200 DEG C, and the heteroatom doped graphene-based material is obtained; preparation of the heteroatom doped graphene-based material supported noble metal nanoparticles: the heteroatom doped graphene-based material is dissolved in deionized water and subjected to ultrasonic treatment, a stabilizer and a metal precursor are added, metal in the metal precursor is platinum, palladium, gold or silver, the mixture is continuously stirred, pH is adjusted to range from 8 to 14, a reduction agent is added, the mixture is continuously stirred, and the heteroatom doped graphene-based material supported noble metal nanoparticles are obtained after vacuum drying. The synergistic effect of the heteroatom and the carrier on noble metal is used, the activity and the stability of a catalyst are effectively improved, and a preparation process is simple and suitable for industrial production and has higher economic value.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER

Device and method for detecting glucose based on optical fiber surface plasma resonance

ActiveCN105158213ASimple preparation process
The invention discloses a device and a method for detecting glucose based on optical fiber surface plasma resonance. The device comprises a light source, a polarizer, a polarization controller, a sensor probe, a filter and a photoelectric detector which are connected with each other in turn through an optical fiber, wherein the sensor probe comprises the optical fiber engraved with inclined fiber bragg gratings; a metal film in nanometer-level thickness is plated on the outer surface of the covering of the optical fiber; the light emitted from the light source passes through the polarizer and the polarization controller and then enters into the optical fiber engraved with the inclined fiber bragg gratings on the sensor probe; a covering film generated in the optical fiber is coupled with the metal film on the outer surface of the covering of the optical fiber; the surface plasma resonance is stimulated; the light containing the plasma resonance output by the optical fiber is sent into the photoelectric detector by the sensor probe through the filter. According to the invention, glucose oxidase is added into a to-be-measured serum solution, so that a hydrogen peroxide corroded metal film is formed, and the glucose concentration in the serum solution is acquired according to a response rate of the light intensity which changes along with the time and is detected and acquired by the photoelectric detector.
Owner:JINAN UNIVERSITY
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