124results about How to "Act as a "catalyst"" patented technology

The invention relates to a mesoporous material and particularly relates to a functionalized ordered mesoporous silicon material which is synthesized by taking polyacid-type ionic liquid as a raw material as well as an application of the mesoporous silicon material in oxidation desulfuration of fuel oil. According to the mesoporous silicon material, the polyacid-type ionic liquid is not only used as a template agent of the mesoporous material, but also used as a catalytic activity center, and transition metal is introduced into the mesoporous material structure in situ. A simple and nontoxic synthesis method of the metal-doped green mesoporous material is searched, has a favorable academical research value and also has a wide application prospect in the industrial production. The mesoporous silicon material as well as the preparation method and the application thereof have the advantages that the method is simple in process, and the mesoporous silicon material which is narrow in pore size distribution, regular and ordered in pore duct and good in thermal stability and has the pore size of 2-50nm is self-assembled under the guidance action of inorganic matters and organic matters by adopting a sol-gel method. The purpose of deep desulfuration can be achieved when the mesoporous silicon material is used as a catalyst for an oxidation removing reaction process of organic sulfides.

The application discloses a method for synthesizing perovskite nanocrystals. The method at least comprises the following steps: S1) obtaining a system I containing organic titanium ester; S2) adding aperovskite precursor to the system I in the step S1) for a reaction under stirring to obtain the perovskite nanocrystalline material. With adoption of the method, the raw materials can be directly mixed at the room temperature, and the method is quick, simple and convenient to operate and is expected to be widely applied to large-scale synthesis of lead halide perovskite quantum dots.

The invention provides a method for producing low alkali cement by using high alkali raw materials, which includes the steps of: putting the raw material limestone with alkali equivalent about 0.80% into a dry cement rotary kiln through a normal channel for putting the raw material into the kiln; adding chlorine-containing substances into the rotary kiln at the locations of a kiln head, a kiln head fuel burner, a flue chamber at kiln tail end, a pre-decomposition kiln or a pre-burning furnace; opening holes at the positions of the bottom part of the pre-decomposition kiln, an ascending flue channel, the flue chamber at kiln tail end or the tail grade cylinder of a pre-heater and inducting the chlorine-containing smoke gas enriched in the positions into a smoke dust collection system and collecting the smoke dust in the smoke gas. The smoke dust collection system comprises a mixing room. The method for producing low alkali cement by using high alkali raw materials uses the special property that alkali metal ions, chloride ions and sulfate ions mutually affect the melting point temperature under the high temperature coexistence condition, adds the chlorine-containing substances during the production process, and leads the chlorine in wastes to be reacted with the alkali in the raw materials by controlling the proportion between the alkali metal ions, chloride ions and sulfate ions entering the cement kiln, thereby achieving the double effects of reducing the alkali in the cement and processing high-chlorine wastes.

The invention discloses a method for production of sulfuric acid by flue gas desulfurization and for sulfuric acid purification and a device thereof. The method comprises the following contents: (1) flue gas undergoes heat exchange and then enters a dedusting quench tower for primary dedusting and cooling process; (2) the flue gas enters a desulfurization tower and successively passes through a deep dedusting unit, a desulfurization unit and a washing unit from the bottom to the top; (3) the obtained overflow rich in an absorption liquid successively passes through a desulfurization unit and a deep dedusting unit and then enters a dedusting quench tower for solid-liquid separation, and the residual gas phase is discharged into the atmosphere; and (4) the absorption liquid separated from solid waste enters an absorption liquid regeneration tower, and enters a sulfuric acid storage tank in the form of dilute sulfuric acid after transition metal cations in the absorption liquid are removed through H<+> in resin. By the method and the device, SO2 in the flue gas can be directly converted into sulfuric acid through oxidation, and a sulfuric acid solution with high concentration is prepared by concentration. The purified flue gas can reach the national or local relevant standards. The method and the device are suitable for recovery processing of flue gas containing various concentrations of sulfur dioxide.

The invention provides a dissolved gas and reagent integrated vacuum preloading method. The method includes steps: step one, sampling engineering waste slurry on site; step two, determining chemical reagents, dissolved gas and the like according to analysis results acquired at the step one; step three, designing a waste slurry settling tank and the like; step four, feeding the waste slurry into the settling tank to a certain height through a pumping pipe; step five, sequentially feeding the chemical reagents and the like into the settling tank through the pumping pipe; step six, feeding the dissolved gas into the waste slurry through a gas adding device and a gas injection pipe; step seven, standing a waste slurry mixture with the chemical reagents; step eight, arranging transverse drainage pipes and vertical drainage pipes in a separation tank; step nine, using a pump for pumping precipitations into a solid-liquid separation tank with a vacuum network drainage system; step ten, step ten, starting vacuum loading after arrangement is finished; step eleven, stopping vacuum loading; step twelve, demounting the vacuum network drainage system after vacuum loading is finished. By the dissolved gas and reagent integrated vacuum preloading method, thorough solid-liquid separation can be realized.

The invention discloses a method for separating molybdenum and rhenium from rhenium and molybdenum-containing concentrate. The method comprises the following steps: adding an adhesive, an oxidant and water in rhenium and molybdenum-containing concentrate to prepare rhenium and molybdenum-containing concentrate pellets with grain size of 3-6mm and moisture of 8-12%, and distributing the concentrate pellets on a chain grate bed of a chain grate machine to carry out drying, oxidizing roasting and cooling, so that molybdenite in the pellets is oxidized into MoO3, and the rhenite is oxidized into Re2O7, which are volatilized to enter smoke and then are recovered by drip washing with water; in above process, the method of oxidizing roasting at two sections is adopted, the oxidizing efficiency of the molybdenite and the rhenite in the concentrate pellets are improved through different air roasting temperatures and air speeds, the Re2O7 concentration in the smoke is improved by circulating roasting smoke in a roasting chamber II to a roasting chamber I, and the smoke is maintained at 300-400 DEG C to effectively inhibit Re2O7 from being reduced by the SO2 so as to increase the recovery rate of the Re2O7; by adopting the roasting method disclosed by the invention, the volatilization rate of rhenium in the roasting process can be not less than 80%, the content of soluble molybdenum in roasted molybdenum is not less than 90%, the molybdenum and the rhenium are efficiently oxidized and separated.

The invention provides a preparation method of a biovalve. The method comprises the steps that S1, decellularization is conducted on a biological tissue material to obtain biological tissues on whichdecellularization is conducted; S2, the biological tissues on which decellularization is conducted are immersed in a buffering solution containing GAG; S3, cross-linking treatment is conducted on thebiological tissues treated in S2 by using GAG cross-linking agent solution; S4, the biological tissues treated in S3 are washed by cleaning liquid, and cross-linking treatment is conducted by using collagen protein cross-linking agent; S5, the biological tissues treated in S4 are cleaned by using the cleaning liquid to obtain the biovalve. By means of the biovalve obtained through the treated biological tissues, tissue wrinkling can be significantly relieved or eliminated to reduce stress generated by tissue bending to increase the smoothness of the tissues, improve the using rate of tissue materials and greatly reduce production cost.

The invention discloses a metal coating for a hydraulic cylinder and a preparation method of the metal coating. The metal coating for the hydraulic cylinder includes the following components in mass percent: 0.65-0.67% of carbon, 1.06-1.08% of potassium, 2.95-2.98% of silicon, 1.53-1.55% of vanadium, 9.73-9.75% of nickel, 0.23-0.25% of manganese, 0.42-0.45% of scandium, 0.74-0.76% of molybdenum, 1.56-1.58% of bromine, 1.22-1.24% of tungsten, 3.12-3.15% of titanium, 0.22-0.25% of zirconium, 3.34-3.36% of rare earth, 2.61-2.64% of auxiliaries, and the balance of ferrum.

The invention relates to a safety treatment method for fluorine-containing solid waste. According to the method, a calcium compound is added into the fluorine-containing solid waste, and a composition fluorine ions in the fluorine-containing solid waste and calcium ions in the calcium compound form a water-insoluble compound calcium fluoride, so that free fluorine ions in the fluorine-containing solid waste are greatly reduced, and the phenomenon that the fluorine ion content of the fluorine-containing solid waste is large and the fluorine-containing solid waste is easily dissolved in soil and groundwater to cause pollution in the prior art is avoided; a curing agent is added to achieve the effect of bonding the fluorine-containing solid waste, and meanwhile, a layer of low-permeability substance is formed on the surface of the fluorine-containing solid waste to limit the transfer of harmful compositions, mainly the fluorine ions, in the fluorine-containing solid waste, so that soil and underground pollution is also avoided.

The invention provides a method for preparing high-purity alumina by virtue of a methylamine method. The method is characterized by preparing methylaminated aluminium through reaction between methylamine and high-purity aluminium, hydrolyzing methylaminated aluminium to generate aluminium hydroxide and methylamine and preparing high-purity alumina by carrying out filtration, washing, drying, calcination, grinding and the like on generated aluminium hydroxide. The method has the prominent advantages of high product purity, simple process, low cost, zero emission and the like. High-purity alumina prepared by the method is suitable for the fields of LED (light emitting diode) long sapphire crystals, laser crystals, transparent ceramics, sodium lamp tubes and the like.

The invention belongs to the technical field of etched glass, and in particular, relates to a preparation process of glass with a scratch-resistant crystal diamond flash point effect. The process comprises the following steps: preparing etching liquid and carrying out etching treatment on a raw glass sheet; depending on a fact that fluoride has an etching effect on glass, carrying out multi-stagechemical reaction with the surface of the glass in acid liquor with certain concentration and type; and generating a nanoscale diamond-shaped microcrystalline particle adhesion layer, and uniformly distributing on the whole glass surface. Therefore, the visual effect of glittering in the light facing process is achieved; meanwhile, the excellent properties of reflection light resistance, scratch resistance, dust resistance, fingerprint resistance and the like are realized; the process is simple and practical, easy to operate and low in cost, microcrystalline diamond particles on the surface ofthe prepared scratch-resistant crystal diamond flash point effect glass are uniform in distribution and consistent in size, and the technical indexes such as roughness, glossiness, light transmittance and haze meet the specific requirements of the art decorative glass industry.

The invention relates to a method for preparing a lithium-sulfur battery anode based on catalysis of active MnO2. The method comprises the following steps: uniformly mixing nano-sulfur simple substance powder, activated manganese dioxide powder, carbon fibers and carbon nano-tubes in a proportion (mass ratio) of (85-90) to (5-10) to 1 to 1, adding absolute ethyl alcohol which has equal mass with the mixture, stirring to obtain a slurry, adding a certain amount of polytetrafluoroethylene (PTFE) emulsion, stirring to obtain paste, uniformly smearing carbon fiber cloth with the paste, heating to120 DEG C under the protection of nitrogen, and heating for 20 minutes, so as to obtain a sulfur electrode. By activating manganese dioxide, the surface of manganese dioxide is adsorbed with particlesof Fe, Ni and the like, and the oxidation reduction of sulfur is integrally catalyzed, so that the charge and discharge electric current densities of the sulfur electrode are increased, high-rate discharging is promoted, more importantly, the unit area capacity of the sulfur electrode can be increased, and a foundation is provided for the preparation of a lithium-sulfur battery with specific energy higher than 700Wh/kg.

The invention discloses an iron-carbon fiber micro-electrolysis reaction device, which consists of a machine frame, a reaction device case, a reaction unit, a high-pressure cylinder, a U-shaped wind pipe, a Roots blower, a distribution pipe, a pneumatic sealing valve and a residual liquid discharge opening, wherein the reaction unit is in a cylindrical shape, the inner layer is a hollow pipe, the outer layer is a stainless steel screen, and a hollow filter core made of iron dust and activated carbon fiber is placed between the inner layer and the outer layer to be fixed in the reaction device case, wherein the activated carbon fiber (ACF) has the adsorption, conduction and catalytic oxidation performance, the activated carbon fiber and the micron order pure iron powder are compounded proportionally to be used as a novel water treatment filling material, and the novel water treatment filling material is made into the filter core to be placed into a cylinder of the reaction unit. Under the action of the micro-electrolysis, the strong oxidizability on oxygenous water-soluble organic substances, chlorinous water-soluble organic substances and water-soluble organic substances with benzene rings can be realized. Because ions generated by substances such as salt (NaCl, CaCl2) and the like are needed in the waste water treatment process, the equipment can be used as an effective device for removing CODcr from waste water with high salt content.

The invention relates to an indoor environmentally-friendly high-efficiency air purification composition and a product thereof. The composition comprises the following components in part by weight: 5 to 95 percent of tourmaline and 5 to 95 percent of hard charcoal. Compared with the prior art, the composition has the advantage that the tourmaline and hard charcoal are combined to function synergically for absorbing and degrading various harmful matters produced by buildings, decorative materials, furniture, cigarettes and the like, so that the indoor air can be purified to protect people against the various harmful matters.

The invention discloses a technique for producing zinc stearate by a dry method. The technique comprises the following steps of: adding stearate, zinc compound and water in a mass ratio of 82 to 88%:10 to 15%:2 to 5% into a reactor, stirring and reacting for 1 to 5 hours at temperature of 50 to 150 DEG C and pressure of 0 to 0.10 MPa, and then obtaining the zinc stearate. The reaction device is characterized in that a motor (1) is connected with a speed reducer (2) which is connected with a gear transmission (3); the gear transmission (3) is connected with a stirrer (9) arranged in a reaction container (4); and a temperature measuring port (5) and a feeding port (6) are arranged above the reaction container (4) which is externally provided with a clamping sleeve (8), and a discharging port (10) is arranged below the reaction container (4). The invention has simple technique, little equipment investment, short production period, no wastewater discharging, high efficiency and low cost; and compared with a melting method, the technique has lower reaction temperature, low energy consumption and good whiteness and the obtained rough product after the reaction is ended is more loose and easy to be crushed.

The invention discloses physically foamed porcelain powder aerated concrete and a production process thereof, wherein the physically foamed porcelain powder aerated concrete comprises the following raw materials: water, cement, porcelain powder, a foaming agent and an external additive. According to the present invention, cement is used as the main cementing material while the insufficient calcium-based materials such as lime and gypsum are eliminated, wherein lime and gypsum can produce a large amount of dust during the production, such that the processing process of the concrete of the present invention reduces the environmental pollution and saves the cost; by adding the external additive, the addition of the external additive provides the catalytic action, and can accelerate the coagulation effect of the cement and the remaining aggregate so as to enhance the strength of the product, shorten the curing time and save the cost; and the curing mode adopted by the process is steam curing, and has advantages of natural gas saving and cost reducing compared with the conventional autoclave curing.

The invention discloses a method for simultaneously measuring fatty acid contents in food for special medical purposes. The method is characterized by including the steps: 1) performing pretreatment on a sample to be measured of the food for special medical purposes for standby application; 2) placing the sample after pretreatment into a gas chromatograph-mass spectrometer and measuring the sample by selected ion scanning gas chromatography-mass spectrometry; 3) detecting the chromatographic peak area of fatty acid methyl ester by an FID (flame ionization detector). Chromatographic conditions include that the fixed phase of a chromatographic column is poly-dicyan propyl polysiloxane, carrier gas is nitrogen, the flow rate of the carrier gas is 0.4mL-0.6mL/min, the temperature of a sample injection port ranges from 240 DEG C to 260 DEG C, split ratio is (25-35):(1-2), sample injection quantity is 1.0 microliter, the initial temperature of the column is 140 DEG C and kept for 5 minutes, temperature rise rate is 3-5 DEG C/min, and the temperature rises to 240 DEG C and is kept for 30 minutes. By the measuring method, RSD (relative standard deviation) values are effectively reduced, accuracy of sample measuring results is ensured, and measured data are real, stable and reliable.