249results about How to "Low activation temperature" patented technology

The invention discloses a waterborne plastic-absorbing glue and a preparing method thereof. The waterborne plastic-absorbing glue is prepared from, by weight, 40-60 parts of aromatic aqueous polyurethane dispersion, 40-60 parts of ethylene-vinyl acetate emulsion, 0-10 parts of tackifying resin, 0.05-0.5 part of antifoaming agent, 0.1-1 part of wetting agent, and 0.1-1 part of thickening agent. The plastic-absorbing glue has excellent heat-resistant performance, pickup rate, bordure performance, low-temperature viscosity stability, and low activation temperature. The preparing method comprises the steps of adding aqueous polyurethane dispersion and ethylene-vinyl acetate emulsion into a high-speed dispersing kettle, then adding the tackifying resin, wetting agent, and antifoaming agent in sequence under a stirring condition, and finally adding the thickening agent to adjust the mixture into suitable viscosity to obtain the waterborne vacuum plastic-absorbing glue. According to the waterborne plastic-absorbing glue and the preparing method thereof, it is not necessary to adjust the pH of the ethylene-vinyl acetate emulsion in advance, and thus preparation procedures of traditional plastic-absorbing glue are simplified, and deslagging risks in the preparing process are lowered.

The invention relates to a method for efficiently preparing cotton based mesoporous activated carbon fiber. The method comprises a step (1) of washing cotton, placing the cotton in a hydrothermal reaction kettle, performing heating to 150-200 DEG C at the heating rate of 5-30 DEG C/min, performing hydrothermal carbonization, performing heat preservation for 1-3 hours and then performing cooling to room temperature; a step (2) of dipping carbonization materials obtained from the step (1) into activator solution, performing microwave-ultrasonic joint dipping for 5-30 minutes and then performing filtration, sending filtration materials to a microwave heating device, performing activation for 5-15 minutes at 250-350 DEG C and then stopping microwave output, and a step (3) of washing the activated materials to be neutral and performing drying to obtain the activated carbon fiber. According to the method, the characteristics of microwave inner heating and selective heating are fully utilized, the technological process is simple, the activation temperature is only 250-350 DEG C, the activation time is only 5-15 minutes, the mesoporous proportion of the activated carbon fiber of the product reaches 50-90%, and the adsorptive property is good.

The invention discloses a copper-based composite catalyst for gas-state zero valent mercury oxidation in the field of smoke control and a preparation method and the purpose thereof. The copper-based catalyst is a copper-based composite oxide catalyst and/or a copper-based composite halide catalyst. The catalyst can utilize oxygen and trace HCI existing in smoke to achieve high efficiency conversion of zero valent mercury (HgO) and divalent mercury (Hg2+) under low temperature in a wider temperature range (500-300 DEG C) and can even achieve high efficiency oxidation of simple substance mercury in smoke free of HCI. The catalyst is suitable for catalytic oxidation of mercury in fire coal smoke, and the product Hg2+ of oxidation can be easily dissolved in water and can be removed by other pollutant control devices. The catalyst is simple in preparation method, wide in suitable temperature range, high in oxidation efficiency, weak in dependency on CI in the smoke, good in stability and high in SO2 poisoning resistance and has good application prospects and economical benefits in the fire coal smoke mercury discharge control fields including power station boilers, industrial boilers, industrial kilns and the like.

The invention relates to a method for preparing activated carbon for a super capacitor with fruit shells as raw material and an application of the activated carbon. The method comprises the following steps: firstly carbonizing the fruit shells in a protective atmosphere, then crushing the carbonized material, mixing with an alkaline activator, heating up to 550-690 DEG C, and activating in the protective atmosphere; and washing the obtained activated material with water, removing impurities by using a mixed acid, then drying, heating up to 760-1000 DEG C, and removing functional groups of the activated carbon surface. The prepared activated carbon has the characteristics of low cost and high performance, the flatulence problem of the super capacitor can be effectively inhibited, and the cycle life of the super capacitor is extended.

The invention relates to a Zr-Co-Re thin film getter provided with a protection layer, and a preparation method thereof. The Zr-Co-Re thin film getter is composed of a getter layer and the protection layer; main components of the getter layer are Zr, Co, and one or more selected form rare earth elements La, Ce, Pr, and Nd; and main component of the protection layer is Ni. Pulsed laser deposition film plating is adopted, and deposition of the double-layer structured thin film getter containing the protection layer and the getter layer on texture monocrystalline silicon is carried out. The texture substrate is capable of increasing effective area of the getter thin film, and so that inspiratory flow rate and inspiratory capacity are increased. The surface of the getter layer is plated with a Ni protection layer; Ni is capable of realizing dissociation of hydrogen, and increasing absorption amount of hydrogen; and the Ni protection layer is capable of inhibiting absorption of oxygen and reducing activation temperature. Activation of the Zr-Co-Re thin film getter can be realized in roasting processes at a temperature of 180 to 350 DEG C; after roasting, the Zr-Co-Re thin film getter possesses excellent inspiration performance at room temperature, can be used for internal gas residue removing of high vacuum microelectronic devices.

The invention discloses a dimethyl ether catalyst and preparing method through hydrating hydration tolerance and carbon deposit resistance carbinol, which is characterized by the following: adding rare earth element La and Ce in the catalyst to improve catalyst hydration tolerance stable property, adding Ca, Mg, Na and K to improve carbon deposit resistance of catalyst.

The invention relates to a method for preparing activated carbon with a large specific surface area through rapid activation. The activated carbon with a large specific surface area is prepared through rapidly activating high-carbon raw materials, such as anthracite, petroleum coke and the like, by auxiliaries and alkali together. The method comprises the steps of uniformly mixing the high-carbon raw materials, the activating auxiliaries and KOH, so as to obtain an alkali-carbon mixture, and heating the alkali-carbon mixture under the protection of an inert atmosphere, so as to obtain an activation product; quickly cooling the activation product to room temperature under the protection of the inert atmosphere; washing the activation product with water, and drying, thereby preparing the activated carbon with a large specific surface area. According to the method, the activation temperature is low, the activation time is short, a relatively high yield of activated carbon with a large specific surface area is obtained under the condition of a lower alkali/carbon ratio, the utilization ratio of alkali, carbon and energy is increased, the production cost is reduced, and the pollution is reduced.

The invention discloses a rare earth element-doped BaZrO3-delta-based perovskite-type Ru-loading ammonia-synthesis catalyst and a preparation method thereof. The rare earth element-doped BaZrO3-delta-based perovskite-type Ru-loading ammonia-synthesis catalyst utilizes a rare earth element-doped BaZrO3-delta-based perovskite-type composite oxide as a carrier having a molecular formula of Ba1-xLnx+yZr1-yO3-delta and comprises Ru as an active component. A rare earth element doping amount is 1-20wt% of the total amount of the carrier. K2RuO4 is utilized as a precursor of the active component and is directly dipped into the carrier, wherein the Ru loading amount is 0.5-10wt% of the carrier amount. The preparation method has simple processes, adopts simple equipment, does not need an auxiliary agent, and has a low precious metal use amount. The rare earth element-doped BaZrO3-delta-based perovskite-type Ru-loading ammonia-synthesis catalyst has good low-temperature low-pressure activity and high stability.

The invention provides petroleum coke based activated carbon, a preparation method therefor and use thereof. The petroleum coke based activated carbon has the following characteristics that the specific surface area calculated by the BET method is 1,700-2,500m<2>/g, the ratio of mesopores with the pore size of 2-50nm accounts for 20-40% of whole pores, the average particle diameter is 5-20 microns, the total content of surface oxygen-containing functional groups tested by the Boehm titration method is lower than 0.1mmol/g, the content of contained total heavy-metal impurities is lower than 100ppm, and the content of anions is lower than 50ppm. The petroleum coke based activated carbon has a high specific surface area, reasonable pore size distribution, low impurity content and high specific capacity and can be applied to supercapacitors.

In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system of an engine, one mode is executed based on satisfaction of an execution condition for each mode, from among a plurality of control modes. The control modes includes a purification control mode in which an addition amount of NH₃ or an additive serving as a generating source of the NH₃ is determined according to a predetermined parameter associated with an amount of NO_x in the exhaust gas, and a storage control mode in which the addition amount is set to be larger than that in the purification control mode. When a rotation speed of an output shaft of the engine is determined to be decelerated from a higher speed state than an allowable level, the execution condition of the storage control mode is satisfied after a predetermined dissatisfaction time period from start of the deceleration.

The present invention belongs to the technical field of zeolite molecular sieves, and in particular relates to a synthesis method of SSZ-13 zeolite. The method comprises the steps: performing hydrothermal reaction on a mixture of alkali metal or an alkaline earth metal source, an oxide source of a trivalent element, an oxide source of a tetravalent element, water and a structural guiding agent, to obtain an SSZ-13 zeolite crystal, cooling, filtering, and washing with water to obtain SSZ-13 zeolite. The structural guiding agent used in the invention has the advantages of low toxicity, low cost, wide range of Si/Al ratio of a synthetic product, low activation temperature, and easiness in industrialization compared with other known structural guiding agents. The SSZ-13 zeolite prepared in the invention shows a high catalytic conversion rate in catalytic removal reaction of nitrogen oxides when being used as a catalyst.

The invention discloses a nitrogen doped porous active carbon material, which is prepared by burning a carbon precursor prepared from sago cycas, a nitrogen source, and an alkaline inorganic substance. The specific surface of the material is in a range of 1136 to 2628 m<2>/g, and the average aperture is in a range of 1.17 to 2.11 nm. The preparation method comprises the following steps: step one, washing the leaves of sago cycas by water, drying the leaves, grinding the leaves, and burning the leaves to obtain a carbon precursor; step two, mixing the carbon precursor, the nitrogen source, and the alkaline inorganic substance, soaking, drying, burning, and carrying out activation to obtain a nitrogen doped porous active carbon material; and step three, soaking the nitrogen doped porous active carbon material in an acid solution, washing, filtering, drying, and grinding to obtain the final nitrogen doped porous active carbon material. When the material is used as the electrode material of a super capacitor, and if the current density is 1 A g<-1>, the specific capacitance is in a range of 266 to 351 F g<-1>. Leaves of sago cycas are taken as the raw materials, the application range is enlarged; and the material has a wide application prospect in the fields of porous materials and super capacitor.

A polymerization process to prepare polyolefin-clay nanocomposites from modified clay is described. Polystyrene-clay nanocomposites formed using the inventive method are highly exfoliated and show improved physical properties relative to polystyrene polymers. The process can be applied to bulk or suspension polymerization. The process provided is a two stage polymerization of monomer in the presence of a modified clay. In a first stage, monomer is polymerized within a clay gallery by an intercalated free radical initiator which is activated at a first polymerization temperature. In a second stage, monomer extrinsic to the clay is polymerized using an oil soluble free radical initiator which is activated at a second polymerization temperature.

The invention relates to an adsorption purification method for hydrocarbon stream, which is mainly used for solving the problems of low adsorption capacity of adsorbent, need of frequent regeneration and high regeneration temperature in the existing adsorption purification method. The method can better solve the problems by adopting the technical scheme of leading hydrocarbon raw material containing a certain amount of oxygen-containing compound impurities to be in contact with the solid compound adsorbent containing metal halide, wherein the adsorbent comprises halide or sulfate of at least one metal selected from alkali metals or alkaline-earth metals and at least one molecular sieve selected from A type, Y type, L type, mordenite, ZSM type zeolite or beta type molecular sieve, and be used for the adsorption purification industrial production of various types of hydrocarbon stream.

The invention discloses modified activated coke, and a preparation method and application thereof. The modified activated coke provided by the invention is the activated coke loaded with a modifier, and the modifier is at least one of bromide salt, bromate, iodate, chloride salt, and chlorate. The modified activated coke has strong capacity of adsorbing mercury, and has the demercuration efficiency in flue gas more than 95 percent. The invention utilizes the prior coal resources at home to prepare the modified activated coke with high performance, low cost and simple process, and achieves ideal effect when used for the demercuration in the flue gas. The invention contributes to solving the problems that the prior active carbon has high manufacturing cost and the prior activated coke has low demercuration efficiency, and has great economic value and social significance.

In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system, a catalyst has properties of storing NH₃ and further decreasing the critical reaction temperature as an amount of NH₃ storage at the catalyst is increased. In the addition-amount controller, a present NH₃ storage amount that is a storage amount of NH₃ of the catalyst is detected at a detection time, the NH₃ storage amount of the catalyst is changed by controlling an addition amount by an addition valve, and the NH₃ storage amount of the catalyst is controlled to a target NH₃ storage amount based on the detected present NH₃ storage amount.

The invention discloses a non-evaporable low-temperature activated zirconium getter film and a preparation method thereof. The non-evaporable low-temperature activated zirconium getter film comprises an adjusting layer, a gettering layer and a protecting layer which grow on a rough monocrystalline silicon wafer sequentially, wherein in terms of chemical composition, the gettering layer contains 75%-77% by mass of zirconium, 18%-22% by mass of cobalt, 2%-5% by mass of yttrium and the balance of other inevitable impurities; in terms of a microstructure, the gettering layer is formed by densely arranged columnar grains, and the height of columnar tissue is 100-300 nm. The prepared getter film has the advantages of being environment-friendly, high in gettering capacity, low in activation temperature, high in adhesion force, long in service life, easy to prepare, low in cost and the like and is applicable to packaging of mini vacuum devices in the industrial field of microelectronics.

The invention relates to a solid adsorbent and a preparation method thereof, mainly solving the problems of low adsorption capacity and higher regeneration temperature of the adsorbent in the prior art. By adopting the technical scheme that a compound solid adsorbent is prepared by combining at least one kind of halide of alkali metal, halide of alkaline earth metal or metal sulfates with a molecular sieve, the invention better solves the problems and can be used for industrial production of adsorption and purification of various hydrocarbon raw materials.

The invention discloses a TiZrVHf quaternary getter thin film. The TiZrVHf quaternary getter thin film comprises four elements, namely, Ti, Zr, V and Hf, and the atomic number ratio is (0.9-1.1): (0.9-1.1): (0.9-1.1): (0.9-1.1): (0.9-1.1). The TiZrVHf quaternary getter thin film comprises a compact layer and a prismatic layer, wherein the compact layer and the prismatic layer sequentially grow inthe inner wall of a substrate pipe. The compact layer is a thin film, has a flat surface, and has no obvious grain structure under an electron microscope. The prismatic layer is a thin film has a rough surface, and has a obvious grain structure under the electron microscope. The prismatic layer has a large surface area and a large suction area, so that the suction rate per unit area of the substrate pipeline increases significantly. The TiZrVHf quaternary getter thin film belongs to the technical field of getter thin films. The TiZrVHf quaternary getter film can be activated at low temperature, strong adhesion and long service life are achieved, the vacuum degree of a particle accelerator is effectively improved, and the secondary electron emission coefficient is reduced.

The invention provides a method for preparing active carbon fibers with high specific surface area and abundant surface functional groups by utilizing hydrogen peroxide intensified water vapor to activate. The method comprises the following steps: heating polymer fibers or pre-oxidation polymer fibers in an inert atmosphere for 800-950 DEG C; and introducing the water vapor containing hydrogen peroxide to activate to prepare the active carbon fibers with the high specific surface area and the abundant surface functional groups. The method has the characteristics of simple preparation process, less environment pollution, low energy consumption and the like, and has a higher actual application value.