95results about How to "Simple conditions of use" patented technology

The invention provides a high selectivity catalyst used for catalyzing and completely oxidizing formaldehyde with low concentration at room temperature. The catalyst can catalyze formaldehyde completely so as to lead the formaldehyde to be converted into carbon dioxide and water at room temperature. In addition, the conversion rate of formaldehyde remains 100% within a long period of time, without complex auxiliary facilities such as light source, a heating oven and the like, and external conditions. The catalyst comprises three parts which are inorganic oxide carrier, noble metal component and auxiliary ingredient. Porous inorganic oxide carrier is one of cerium dioxide, zirconium dioxide, titanium dioxide, aluminium sesquioxide, tin dioxide, silicon dioxide, lanthanum sesquioxide, magnesium oxide and zinc oxide or the mixture thereof or composite oxide thereof, zeolite, sepiolite and porous carbon materials. The noble metal component of the catalyst is at least one of platinum, rhodium, palladium, gold and silver. The auxiliary ingredient is at least one of the alkali metals of lithium, sodium, kalium, rubidium and cesium. The loading of the noble metal component used in the catalyst of the invention is 0.1 to 10% according to weight converter of metal elements and the selective preference is 0.3 to 2%. The loading of the auxiliary ingredient is 0.2 to 30% according to weight converter of metal elements and the selective preference is 1 to 10%. When the loading of the auxiliary ingredient is lower than 0.2% or higher than 30%, the activity of the catalyst for catalyzing and oxidizing formaldehyde at room temperature is decreased remarkably.

A composite oxide catalyst for removing NOx from the tail gas generated by combustion through low-temp selective catalytic reduction reaction in which ammonia gas or urea is used as reducing agent for reducing the NOx into N2 and H2O is prepared from a composite metallic oxide (whose main component is manganese oxide) and a porous inorganic oxide as carrier through citric acid complexing method.

The invention discloses a cerium copper titanium composite oxide catalyst for flue gas denitration and a preparation method. The catalyst comprises the following components: CeO2, CuO and TiO2. The catalyst is prepared by a coprecipitation method and can promote the generation of an ideal denitration effect. The catalyst has the advantages that: 1) the catalyst has the high activity for the catalytic reduction of nitric oxides in flue gas; 2) the adaptive temperature window of the catalyst is wide, namely the catalyst has certain activity within the integral temperature range from 150 to 450 DEG C; 3) the operating performance of the catalyst under the condition of SO2 and H2O can be improved effectively, and the catalyst has the strong adaptivity to severe working conditions in the presence of sulfur dioxide, water and the like and has the wide application range; 4) raw materials for preparation are easy to obtain, a preparation process is simple and the cost of the catalyst is low.

The invention discloses a supported integrated catalyst for formaldehyde purification and a preparation method thereof. The supported integrated catalyst consists of a titanium dioxide nanotube array supporter and precious metal M, wherein the precious metal M is one or a mixture of at least two of Pt, Ru, Rh, Pd and Au. The titanium dioxide nanotube array supporter is soaked in a precursor solution containing the precious metal and then is roasted to obtain a precious-metal-component-supported catalyst, and the catalyst is reduced through hydrogen or a reducing solution and can be directly used for catalytically purifying formaldehyde. The catalyst is simple in composition and preparation flow, and convenient to popularize and apply. The high activity and stability of the catalyst on the formaldehyde can be kept at low temperature, the formaldehyde can be catalytically oxidized under the condition that other additional devices are not needed, and can be converted into harmless H2O and CO2, and thus the green elimination of the formaldehyde is further realized.

The invention relates to a main transformer differential protection CT polarity check method of a pumped storage power station. In the invention, an applied power method is adopted to solve the problem that the main transformer differential, bus differential and high-voltage cable differential protection CT polarity cannot be checked during the inversed electrification of a main transformer before the machine set of the power station is started, thereby the safety and reliability of the system and the inversed electrification of the main transformer are ensured. The method has the advantages that the operation and the using condition are simple, the used test instrument equipment can be used repeatedly, the water debugging straight-line period of the machine set is not occupied, the temporary high-voltage cable investment is saved, and the commissioning cost is reduced; therefore, the method has favorable popularization and application prospect.

The invention discloses a catalyst for complete catalytic oxidation of indoor low concentration formaldehyde at room temperature, the catalyst is characterized by comprising a nano metal oxide, a noble metal component and an assistant component, the nano metal oxide is used as a carrier, the noble metal component is at least one from platinum, palladium, ruthenium, rhodium, gold and silver, and the assistant is one or more than one substance from rare earth elements lanthanum, cerium, praseodymium, samarium, yttrium and neodymium, one or more than one kind of. The catalyst has the advantages that: the catalyst uses one or two rare earth modified nano inorganic oxide carrier, and is helpful to improve the dispersity and formaldehyde catalytic oxidation activity of metal nanoparticles. Therefore, under the circumstances of maintaining the same catalytic activity, the amount of noble metals can be reduced, and the cost of the catalyst can be reduced. The catalyst can completely oxidize formaldehyde at room temperature, does not need the help of optical, electric and other complex external auxiliary equipment. The catalyst can catalytically oxidize indoor low concentration harmful gas formaldehyde into non-toxic harmless carbon dioxide and water at room temperature.

The present invention provides a liquid preparation composition comprising a solvent and a surfactant dissolving in the solvent, the surface tension of the liquid preparation composition is less than 60mN / m, and the pH of the liquid preparation composition is 5.0-7.4. The present invention also discloses a preparation method of the liquid preparation composition and use of the liquid preparation composition in treatment of otitis media, otitis externa, rhinitis, nasosinusitis, lower respiratory tract inflammation, xerostomia, xerophthalmia and dry noses. The present invention also discloses a preparation comprising the liquid preparation composition. The liquid preparation composition can effectively relieve the otitis media, the otitis externa, the rhinitis, the nasosinusitis, the lower respiratory tract inflammation, the xerostomia, the xerophthalmia, the dry noses and other symptoms, can be used in the form of sprays or liquid droplets, can be applied to an effective site without use of a propellant or an atomization device, is easy to operate, and can effectively avoid stimulation and injury caused by the propellant and use inconvenience of the atomization device.

The invention relates to a formaldehyde room temperature purification nano-palladium-loaded nano cerium oxide catalyst. A nano cerium oxide cubic block is used as a carrier, and the surface of the carrier is loaded with the nano palladium by deposition-precipitation method to obtain the loaded type catalyst. The formaldehyde room temperature purification loaded type catalyst can convert most or all of the formaldehyde under the condition of room temperature into carbon dioxide and water without production of by-product of formic acid, carbon monoxide, and the like, and the formaldehyde conversion rate is up to 100%.

The invention relates to a mobile attendance method, in which a method of acquiring the starting time of a system with combination of network time is employed for effectively solving a problem that the attendance time is liable to be tampered in the prior art. By means of GPS data with combination of base station positioning data, accuracy of checking-in geographic position of users, thereby solving a difficult problem of attendance management of a large amount of outworkers in many enterprises. The method achieves verification of the accuracy of people, position and time, can avoid false attendance and ensures fairness and reasonability and scientific management of personnel attendance checking system in enterprise. With combination of information management on a server, the method also allows functions of application and cancellation of leave and query of personal attendance status, thereby greatly satisfying requirements of both the enterprise and the outworkers. The method is simple in use conditions and can be carried out just by general mobile devices (such as cell phones). The checking-in operation of users is simple and convenient and is high in acceptability. The method can be popularized smoothly in enterprises well and is suitable for attendance management of the attendance of outworkers and the workers whose working position is not fixed.

The invention relates to a multifunctional phosphating solution and a preparation method and application thereof. The multifunctional phosphating solution comprises liquid A and liquid B and is characterized in that a ratio of the liquid A to the liquid B in the multifunctional phosphating solution is 1: 0.1-1. The liquid A comprises the following substances, by mass, 26 to 48 parts of diammonium phosphate, 0.9 to 12 parts of phosphoric acid with a concentration of 85%, 0.8 to 1.8 parts of metal powder, 0.6 to 1.4 parts of animal glue, 0.4 to 10 parts of calcined gypsum powder and 0.3 to 0.8 part of alum, with the balance being water. The liquid B comprises the following substances, by mass, 20 to 46 parts of zinc dihydrogen phosphate, 38 to 55 parts of zinc nitrate, 2 to 3.8 parts of sodium fluoride, 2 to 4 parts of zinc oxide and 2 to 6 parts of phosphoric acid with a concentration of 85%, with the balance being water. The multifunctional phosphating solution provided by the invention is composed of the liquid A and the liquid B, can realize removal of oil and rust at the same time and has the efficacy of rust protection, heat insulation, high temperature resistance, heat preservation, flame retardation, noise abatement, shock prevention, isolation, pollution cleaning and resistance to fire. The multifunctional phosphating solution has the following beneficial effects: a fast rust removal speed, great thickness of a formed film, long antirust time, etc.

The invention discloses a copper-iridium composite oxide catalyst for preparing methanol by direct methane oxidation and a preparation method thereof, belonging to the technical field of preparing themethanol by methane oxidation. The catalyst consists of an iridium oxide, a copper oxide and a cocatalyst of a zinc oxide, a cobalt oxide or an iron oxide. The weight percentage of noble metal iridium is 0.1-10.0% and the weight percentage of the cocatalyst MOX is 0-20.0% based on the weight percentage of the catalyst of 100%. Compared with other copper-based catalysts use for preparing the methanol by methane oxidation, the copper-iridium composite oxide catalyst has the characteristics of simple preparation method, high methanol yield and repeated recycle in the reaction of preparing the methanol by methane oxidation.

The invention particularly relates to a titanium dioxide nanorod palladium-supported (Pd) nanoparticle catalyst for formate decomposition reaction. A titanium dioxide nanorod is used as a support, nano Pd is supported to the surface of the support by means of surface modified in-situ reduction to obtain the supported catalyst. By using the supported catalyst for producing hydrogen by decomposing a formate at room temperature, efficient catalytic decomposition of all formats can be achieved at room temperature, and pure H2 is produced without other gases.

The invention discloses a room-temperature air purification non-photo-catalyst. The catalyst comprises components in percentage by weight as follows: 0-5% of a transitional element oxide, 0-10% of a rare-earth element oxide and the balance of nano MnO2, wherein the transitional element oxide comprises a silver oxide, a zinc oxide or a copper oxide, and the rare-earth element oxide comprises a lanthanum oxide, a cerium oxide, a praseodymium oxide or a neodymium oxide. The invention further designs a preparation method of the room-temperature air purification non-photo-catalyst. According to the room-temperature air purification non-photo-catalyst and the preparation method thereof, usage conditions are simple, and no electric power, heating power or light source is required, so that resources are saved; organic pollutants can be effectively catalyzed under the room temperature condition to generate harmless carbon dioxide and water; the conversion rate of the organic pollutants can be up to 100% within the effective working time interval.

The invention discloses a fiber/nano manganese dioxide composite material and a preparation method and an application thereof. The method comprises the following steps: 1) pretreatment of a fibrous raw material: performing selective oxidation treatment on the fibrous raw material, and washing the fibrous raw material to a neutral state to obtain oxidized fibre; and 2) preparation of the compositematerial: processed the oxidized fiber through dilute acid treatment and washing the material to the neutral state, mixing the material and a Mn2+solution and uniformly stirring the materials, addingan oxidizing agent and reacting the materials, washing the material, and drying the product to obtain the fiber for in-situ growth of nano manganese dioxide. The particle size scope distribution of the nano manganese dioxide particles is narrow, the distribution of the nano manganese dioxide particles on the surface of the fiber is uniform, shedding is difficulty happened, and the obtained producthas the excellent performance of fiber and nano manganese dioxide, can be processed as a wood functional material having decorative performance and functional performance, can perform catalytic purification of formaldehyde in a room without illumination, and enriches an application field of nano manganese dioxide.

The invention relates to flame retardant rigid polyisocyanurate foam and a preparation method thereof. The flame retardant rigid polyisocyanurate foam is prepared from the following components in parts by weight: 150-170 parts of polyisocyanate, 5-8 parts of polyether polyol, 15-20 parts of flame retardant, 2-3 parts of catalyst, 1-2 parts of stabilizer, and 15-20 parts of foaming agent. The flameretardant is prepared by mixing a nitrogen-containing flame retardant and a phosphorus-containing flame retardant at the mass ratio of 1:1. The preparation method comprises the following steps: S1, mixing an additive; and S2, preparing rigid polyurethane foam. The flame retardant rigid polyisocyanurate foam has the advantages of being good in flame retardant effect, high in rigid foam performanceand suitable for industrial production.

The invention belongs to an operative technology in the field of environmental engineering, and provides a photocatalytic material (Ag2Ta4O11/Ag/Ag8(Ta0.5Nb0.5)26O69) capable of completely and rapidlydegrading formaldehyde and benzene of an indoor environment under visible light to achieve a purpose of purifying air. A three-phase photocatalyst capable of efficiently oxidizing the formaldehyde and the benzene of the indoor environment under visible light is prepared from ethanol, tantalum pentoxide, niobium pentoxide, silver nitrate and polyvinylpyrrolidone through a simple ethanol refluxingmethod, a solid thermal method and in-situ reduction. Only a small amount of the catalyst needs to be horizontally laid on the surface of solid, then the formaldehyde and the benzene can be oxidized into carbon dioxide and water under illumination of the visible light, secondary pollution is avoided, and moreover, the catalyst is reusable and is quite high in stability and quite good in selectivity. The prepared catalyst is toxic-free and harmless, and is convenient to recycle and low in cost of raw materials. The catalyst meets the requirement for environment purification, and is expected tobe applied to the fields of indoor air purification such as air purifiers and internal wall coatings.

The invention discloses a method for performing drainage and energy dissipation by utilizing steps. A drainage channel overflowing face is designed to be an identical-slope-ratio step structure. The ratio of height T to width h of identical-slope-ratio steps is designed slope ratio of the drainage channel overflowing face. The designed energy dissipation rate eta of a drainage channel is confirmed according to the total height P and the drainage amount q per unit width of the drainage channel and step roughness coefficient n of the identical-slope-ratio steps. The step roughness coefficient n of the identical-slope-ratio steps is confirmed according to protruding height delta of the identical-slope-ratio steps. The protruding height delta of the identical-slope-ratio steps is confirmed according to the step height T of the identical-slope-ratio steps and an included angle formed by the drainage face and a horizontal face. The step height T of the identical-slope-ratio steps is confirmed according to the drainage amount q per unit width of the drainage channel, and the drainage amount q per unit width of the drainage channel is confirmed according to the width B of the drainage channel. The drainage face is an oblique plane composed of oblique sides of a right angled triangle consisting of two right angled sides of each of identical-slope-ratio steps. The method for performing the drainage and the energy dissipation by utilizing the steps has the advantages of being simple in structure and saving engineering investment.