47results about How to "Low oxidation temperature" patented technology

The invention provides a preparation method of high softening point asphalt, and the method comprises: heating an asphalt raw material to a molten state, subjecting the asphalt raw material, reaction additives accounting for 0.01%-5% of the total mass of the asphalt raw material, as well as air to full premixing reaction, with the mixing temperature controlled at 80-180DEG C and the mixing time controlled at 1min-40min; then introducing the mixture to an oxidation reactor for air blowing oxidation at a temperature of 200-340DEG C for 3-10h, with the air blowing rate of an oxidation tower maintained at 0.05-0.5m<3>.kg<-1>.h<-1>, thus obtaining a high softening point asphalt product with excellent high temperature performance and temperature susceptibility resistance. The method of the invention solves the problems of overlong reaction time, nonuniform air distribution, easy coking, short oxidation tower operation cycle, and poor product performance, etc. existing in current high softening point asphalt production processes by oxidation method.

The invention discloses a silver copper based metal oxide electrical contact material containing adding elements and a preparation method thereof. The electrical contact material is characterized by comprising the following components in percentage by weight: (20-50)% of silver metal oxide alloy, (0.3-9)% of electric conductive ceramics, (0.7-1.8)% of lanthanum nickel alloy, (0.7-4.9)% of adding elements, and the balance of silver copper alloy; and the contact material provided by the invention comprises the following simple substance elements in percentage by weight: (15-63)% of silver, (4-25)% of metal oxide, (0.3-9)% of electric conductive ceramics, (0.01-5)% of rear earth, (0.7-4.9)% of adding elements, and the balance of copper. The preparation method is characterized by comprising the following steps: smelting, pulverizing and milling (silver metal alloy power, and silver copper alloy powder) in proportion for optimization performances of the material, cladding electric conductive ceramic micro powder by silver, mixing powder of the adding elements in a certain mass ratio, pressing an ingot blank, sintering and extruding, rolling or drawing, thus obtaining the contact material. The electrical contact material provided by the invention has the advantages of low cost and excellent overall performance.

Provided are a layered complex oxide that can lower PM oxidation temperature and increase oxidation rate, and a nitrogen oxides reduction catalyst, a three-way catalyst, a DPF and an oxidation catalyst, each of which includes the layered complex oxide. The layered complex oxide has a layered perovskite structure and has a composition represented by the formula: (Ln_3-xA_x)_1-αMn₂O_7-δ (wherein Ln is La and/or Nd, A is Sr and/or Ca, α is degree of A-site deficiency, δ is the oxygen deficit amount, and X, δ and α satisfy 0<X<3, 0<α<1 and δ<1.4), which are included in the catalysts and DPF.

The invention provides a catalyst and a preparation method thereof, wherein the catalyst comprises the following compositions in percentage by mass: 20 to 60% of Fe2O3, 20 to 60% of MnO2, 9.7 to 30% of Mn2O3, and 6 to 30% of Mn3O4; and the method for preparing the catalyst comprises the following steps of: adding a polyethylene glycol aqueous solution into a bivalent manganese salt aqueous solution at a certain temperature, then adding potassium permanganates and a ferric salt aqueous solution into the obtained mixed solution; stirring the obtained mixture so as to obtain a precipitate; filtering the obtained object so as to obtain a solid as the precursor of the catalyst; drying and then roasting the solid; and crushing the obtained solid subjected to roasting into particles so as to obtain the catalyst. The catalyst and the preparation method provided by the invention have the advantages that by using the prepared catalyst, at a reaction temperature of 100 DEG C, the rate of conversion between NO in tail gas and NO2 can achieve 91%; the prepared catalyst is larger in specific surface area and pore volume, and high in catalytic oxidation efficiency; and the prepared catalyst has a low-temperature catalytic activity, and can be used in the removal of NO in low-temperature oxygen-containing exhaust emission sources without performing the removal at a high temperature and addingoxidants, thereby saving energy and reducing consumption and cost.

The present invention provides a preparation method of a nickel oxide anode film used for the solid film lithium-ion battery, which adopts the vacuum vapor deposition method to deposit a Ni film on a substrate, and then adopts the heat oxidation method combining with the oxygen generator to prepare a NiO film material. The oxidation temperature for the preparation method of the nickel oxide anode film of the solid film lithium-ion battery provided by the present invention is low, the cost is low, the process and the equipments are simple, the deposition speed is higher than that of the traditional method, and a nano nickel oxide film with uniform granular size and complete structure is easy to obtain, which has good chemical performance, and can be used as the anode material of the solid film lithium-ion battery.

The invention provides a preparation method and application of a grain boundary layer ceramic material and a grain boundary layer ceramic substrate, and belongs to the technical field of chip capacitors. The grain boundary layer ceramic material provided by the invention is prepared from the following preparation raw materials in parts by mass: 95.35 to 99.30 parts of SrTiO3, 0.30 to 0.55 part ofNb2O3 and 0.30 to 5.00 part of a modification additive comprising one or more of BaCO3, Nd2O3, CaO, Sm2O3, Al2O3 and SiO2. The grain boundary layer ceramic material has excellent electrical propertiesand controllability, and a grain boundary layer ceramic substrate prepared from the grain boundary layer ceramic material has excellent repeatability and consistency.

A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.

The invention discloses a preparation method for high-softening point asphalt. The method includes: respectively spraying molten state asphalt and an oxidant into an oxidation reactor at the same time to undergo oxidation reaction, thus obtaining the high-softening point asphalt. Specifically, the oxidant is nanoscale potassium permanganate and/or nanoscale potassium dichromate. The asphalt and the oxidant are respectively sprayed into the oxidation reactor in the fog state at the same time by a high pressure pump and compressed air to undergo mixing. The method provided by the invention has the advantages of less oxidant consumption, low oxidation temperature, high reaction efficiency, convenient operation, environment-friendly reaction process, and low energy consumption.

The invention belongs to a metal surface chemical heat treatment technology and aims to provide a chemical heat treatment method capable of obviously improving the corrosion resistance of a gear. According to the method, ion oxidation treatment is carried out on the gear which is subjected to ion nitriding, wherein air is used as an air source, the ion oxidation treatment and the ion nitriding are carried out in the same furnace; and after the ion nitriding is carried out on the gear at 560 DEG C, and air is introduced for oxidization for 0.25-1 hour after the temperature is reduced to 350-450 DEG C. According to the chemical heat treatment method, one layer of a dense oxidized film which mainly contains Fe3O4 is generated on the surface of a nitriding layer of the gear; under the same condition, compared with a gear sample which is not oxidized, the gear which is subjected to ion oxidization has the advantages that the corrosion resistance can be obviously improved and the surface rigidity gradient of the nitriding layer is obviously slowed down. The chemical heat treatment method is simple to operate; compared with other oxidization methods, the method provided by the invention has the advantages that no auxiliary equipment is used, an oxidization medium is air, and the oxidization temperature is low and the consumption of energy sources is reduced; moreover, the chemical heat treatment method has the advantages of low treatment cost, high production efficiency and the like.

The invention discloses an aluminum section bar surface brightening method. The aluminum section bar surface brightening method comprises the steps of sand blasting, oil removing, water washing, polishing, oxidizing, coloring, medium-temperature hole sealing and electrophoresis curing, wherein the polishing is performed inside a three-acid polishing tank, the three-acid polishing tank contains theingredients of, in percentage by weight, 65-85% of phosphoric acid, 14-22% of sulfuric acid and 6-8% of nitric acid, the polishing is performed for 20-25 min under the condition of the polishing temperature being 100-110 DEG C, and by means of reduction of the oxidizing temperature and the oxidizing tank sulfuric acid concentration, the oxide film production speed can be reduced, a more uniform and compact oxide film is obtained, and appearance of flow marks in aluminum materials is reduced; and the aluminum materials are not prone to fading when being subjected to the water washing and electrophoresis after being subjected to the coloring and the hole sealing and high adhesion can be obtained when the electrophoresis is performed in a half hole sealing state, and when combination with the electrophoresis is performed, suitable voltage can slow down the paint film coating speed, in addition of an appropriate curing method, dye color changing and coating surface roughness and excessivebrittleness can be prevented, and the coating adhesion is improved.

The invention relates to a method of producing a catalysed particulate filter. The invention is characterised in that, in order to lower the particulate oxidation temperature, the filter is provided with a cerium oxide, a zirconium oxide or a cerium/zirconium mixed oxide which can also comprise at least one rare earth oxide other than cerium. The porosity of said oxide or mixed oxide is such that at least 80 % of the pore volume comprises pores having a diameter of least 20 nm.

The invention discloses a method for industrially producing crotonic acid by adopting a microchannel reactor, and relates to the technical field of chemical production of crotonic acid. A silicon carbide ceramic plate type micro-channel reactor is adopted, crotonaldehyde, a catalyst and an initiator are mixed and preheated according to a certain proportion, meanwhile, a gaseous oxidizing agent is introduced into the reactor, when the pressure in the reactor reaches 0.6-2.0 MPa, the mixed solution is injected into the micro-channel reactor through a metering pump for a reaction, the retention time of the materials is 8-30 min, and then the crotonaldehyde is obtained. The crotonic acid finished product can be obtained through the processes of material oxidation, crude product crystallization, crude product fine washing, fine product crystallization, drying granulation, catalyst regeneration and the like, the one-time yield of the product can reach 60%, and the mechanical application yield can reach 95%. The method has the advantages of good mass transfer and heat transfer effects, short oxidation reaction time, high product yield, high safety degree, few process steps, recyclable catalyst, low production cost, recyclable raw materials in each step, high reaction speed, low wastewater energy consumption and the like.

The invention discloses a sulfur-tolerant catalyst for removing co and vocs and a preparation method of the sulfur-tolerant catalyst. The sulfur-tolerant catalyst comprises a carrier, a coating, Pt, Pd, Ir, auxiliaries, Co, Mo and S. The method comprises the following steps of: dissolving cobalt salt, molybdenum salt and ammonium sulfide under an acidic condition, adding activated carbon into a dissolving solution for dipping, then performing aging, adding hydrazine hydrate for reflux, performing cooling, filtering, washing and drying in vacuum; soaking a carrier in a coating mixed solution, performing purging, drying, calcining, and soaking the carrier in a mixed solution of a chloroplatinic acid solution, a chloropalladic acid solution, a chloroiridic acid solution and a nitrate solution for more than 6 hours by adopting an equivalent-volume impregnation method; finally, adding a reducing agent at 40-80 DEG C, taking out the carrier, washing and drying the carrier so as to obtain a target product, putting the target product and a Co-Mo-S catalyst into a porous container together. The catalyst reduces the activation energy of organic matter, enables the oxidation temperature of the organic matter to be reduced to 300 DEG C to be subjected to oxygenolysis, and is good in sulfur-resistant effect and good in poison resistance to other harmful substances.

The invention provides a preparation method of high-softening-point asphalt particles for drilling fluid. The preparation method comprises the following steps of: (1) preparing high-softening-point asphalt; and (2) placing the high-softening-point asphalt in a closed container, heating to 80-190 DEG C, adding a solvent for dissolution, mixing uniformly, introducing inert gas to regulate the pressure of the closed container to be 3.0-10.0MPa, stabilizing for 10-80min, then feeding into a separator through a throttling valve to form asphalt particles, and recovering the solvent in a gaseous-state form. According to the invention, the problem that the high-softening-point asphalt is difficult to smash into fine particles is solved. The asphalt particles can be widely applied to deep oil gas well drilling operation processes to serve as an important constituent part of the drilling fluid and play the roles in preventing collapse, stopping leakage, reducing filter loss and the like.

The invention discloses a thioether oxidation tower for producing dimethyl sulfoxide, for solving the problems of the existing oxidation tower that liquid level in the tower is not stable, safety is poor, the content of nitric oxide in tail gas is high, and the control difficulty is high. According to the technical scheme of the invention, the thioether oxidation tower comprises a tower body; the tower body is divided into a heating area, a reaction area, a sub-cooling area and a cooling area from bottom to top; each of the reaction area, the sub-cooling area and the cooling area is internally provided with a cooling water coil pipe and a cooling water jacket on the wall of the tower; the heating area is provided with an oxidation air inlet; the reaction area is provided with a thioether feeding point; a tail gas outlet is formed at the upper section of the cooling area; the sub-cooling area is provided with a sulfoxide outlet under the liquid level; the upper section of the sub-cooling area is provided with a compressed air inlet. The thioether oxidation tower is simple in structure, simple and convenient to operate, good in reliability and low in oxidizing temperature; in addition, the liquid level in the tower is stable, no gas-phase reaction is generated and the content of nitric oxide in the tail gas is low.