33results about How to "Reduce reaction resistance" patented technology

The invention discloses an anti-corrosion and high-temperature-resistant reaction device integrating reaction and separation, which comprises a reaction kettle body, an anti-corrosion layer, a bracket, a reactant container, a separation aid box, a condensation conical frustum, a sealing gasket and a reaction kettle cover; Additional feed pipes for reactants, auxiliary agent input pipes, coolant inlet pipes, coolant outlet pipes, auxiliary agent vent pipes and product outlet pipes are added; among them, the condensate conical frustum is pre-embedded with a coil cooling structure, and the separation aid The outer bottom of the kit is an upward convex structure. This device can be used under the conditions of strong acid, strong alkali medium, high temperature and high pressure. The by-products are transferred and transformed, which reduces the reaction resistance and improves the conversion rate of materials in the kettle. , the product yield is high, the mother liquor is directly used for the next batch of synthesis, the reaction and separation are carried out simultaneously, the separation process does not need to consume additional transportation and heating energy, no need to build special separation equipment, energy saving, space saving, simple process, Economical and reasonable, conducive to engineering strengthening.

The invention discloses a compound reducing agent for smelting low-grade tungsten and molybdenum ores and a smelting method thereof, and belongs to the field of low-grade tungsten and molybdenum ore resource utilization. The compound reducing agent comprises modified silicon carbide, modified quartz and an addition agent. The modified silicon carbide is a mixture of silicon carbide powder and silica powder. The surface of the modified quartz is coated with a coating component, and the coating component includes asphalt. The addition agent comprises coke powder. According to the compound reducing agent for smelting the low-grade tungsten and molybdenum ores and the smelting method thereof, under the mutual promotion effect of the modified silicon carbide, the modified quartz and the addition agent, the reducing action on the low-grade tungsten and molybdenum ores is good; the silica powder coated on the surface of the modified silicon carbide has good reaction performance, the modified silicon carbide can respond to intervention quickly under the promotion effect of the modified quartz and further be reacted with CaMoO4 and CaWO4, the modified silicon carbide can further produce CO gas with reducibility in the reacting process, and reducing efficiency of the low-grade tungsten and molybdenum ores can be improved.

The invention discloses a preparation method for a cobalt-modified porous charcoal catalyst for demercuration and belongs to the technical field of control on mercury discharge of coal-fired flue gas.The preparation method comprises the following steps: taking fir as a charcoal carrier and taking Co3O4 as an active ingredient; adopting a sol-gel method for paving a crystal seed layer of crystal;performing hydro-thermal treatment for realizing growth of Co3O4 nanocrystal; performing carbonizing treatment, thereby acquiring a supported catalyst with high-dispersion active ingredients. According to the invention, source of raw materials is extensive, process is simple and controllable, operation conditions are mild and the demercuration efficiency of the acquired Co-modified porous charcoalcatalyst under different temperatures is above 80%.

Disclosed is an air electrode for a metal-air battery, the air electrode including a separator composed of a hydroxide-ion-conductive inorganic solid electrolyte being a dense ceramic material, and an air electrode layer disposed on the separator and containing an air electrode catalyst, an electron-conductive material, and a hydroxide-ion-conductive material, or containing an air electrode catalyst also serving as an electron-conductive material and a hydroxide-ion-conductive material. According to the present invention, the reaction resistance of the air electrode including the dense ceramic separator can be significantly reduced in a metal-air battery while ensuring the desired characteristics of the dense ceramic separator.

The invention discloses a cyclopentanone green synthetic method, which is characterized by comprising the following steps: 1)a by-product dicyclopentadiene is taken as a raw material during a process of cracking petroleum to prepare ethane, the processes of pyrolysis, quick separation and cooling to obtain cyclopentadiene; 2)under the effect of a first catalyst on cyclopentadiene, an auxiliary agent with mass fraction with 0.8% is added for selective hydrogenation to prepare cyclopentene; 3)then cyclopentene and acetic acid are performed with a esterification reaction to prepare et hanoic acid cyclopentyl ester; 4) then et hanoic acid cyclopentyl ester and sodium hydroxide are reacted to generate cyclopentanol; and 5)a constant temperature crystallization technology is employed, a crystallization kettle with cyclopentanol is continuously added in a high temperature sodium acetate solution, under the effect of a second catalyst, the crystal is continuously centrifuged, a large mother liquor is used for circularly cooling and performing heat exchange and then is returned to a crystallization kettle, and the catalysis and dehydrogenation are carried out to prepare the cyclopentanone. The cyclopentanone green synthetic method has the advantages of high selectivity, high yield, low energy consumption and less side reaction, and can solve the problems of corrosion and environmental pollution.

The present invention provides a solid oxide fuel cell (SOFC) including a porous fuel electrode which allows reaction of a fuel gas to proceed and which is formed of Ni and YSZ, a porous air electrode which allows reaction of an oxygen-containing gas to proceed, and a dense solid electrolyte membrane which is provided between the fuel electrode and the air electrode and which has an interface with the fuel electrode. In the fuel electrode, Ni grains present in a region located within 3 μm from the interface (i.e., a “near-interface region”) have a mean size of 0.28 to 0.80 μm, YSZ grains present in the near-interface region have a mean size of 0.28 to 0.80 μm, and pores present in the near-interface region have a mean size of 0.10 to 0.87 μm. Thus, the fuel electrode of the SOFC exhibits low reaction resistance.

The invention discloses a method for smelting a ferrotungston-molybdenum-iron alloy by adopting a low-grade tungsten and molybdenum ore, and belongs to the field resource utilization of low-grade tungsten and molybdenum ores. The method includes the steps that a compound reducing agent is added into the low-grade tungsten and molybdenum ore, the proportion of the compound reducing agent and the low-grade tungsten and molybdenum ore is phi, as the formula shows in an original text that, wherein the value of gamma is 5-6, and the alpha is the mass ratio of modified silicon carbide to modified quartz; and the value of kappa is as the formula showing in the original text; and the compound reducing agent and the low-grade tungsten and molybdenum ore are added into a vacuum furnace, tungsten and molybdenum metal and slag are obtained through reduction, the tungsten and molybdenum metal and the slag are contained in a reaction furnace, steel scrap is added into the reaction furnace, temperature rising smelting is conducted, and the ferrotungston-molybdenum-iron alloy is obtained after smelting is completed. According to the method for smelting the ferrotungston-molybdenum-iron alloy by adopting the low-grade tungsten and molybdenum ore, tungsten and molybdenum in the low-grade tungsten and molybdenum ore can be utilized sufficiently, the harmful elements like P in the alloy can be reduced, and the quality of the alloy is improved.

The invention discloses a method for smelting low-grade tungsten and molybdenum ore and a method for recycling phosphorus simultaneously during smelting of the low-grade tungsten and molybdenum ore and belongs to the field of resourceful utilization of the low-grade tungsten and molybdenum ore. The method for smelting the low-grade tungsten and molybdenum ore specifically includes the steps that (1) ore powder pre-treatment is performed, specifically, ore powder is added into a ball mill for ball milling; (2) mixing and pelletizing are performed, specifically, a composite reducing agent is added into the ore powder for dry mixing, a bonder is added into a mixture obtained after uniform mixing is finished, and tungsten and molybdenum ore pellets are prepared on a disc pelletizing machine; and (3) smelting of the tungsten and molybdenum ore is performed, specifically, the tungsten and molybdenum ore pellets are dried in a drying oven and then added into a vacuum furnace for reducing smelting, and the smelting temperature ranges from 1300 DEG C to 1500 DEG C. By means of the method for smelting the low-grade tungsten and molybdenum ore, silicon powder wrapping the surface of modified silicon carbide of the composite reducing agent is good in reaction property and can rapidly intervene in the reaction under promotion of modified quartz, CO with the reducing property can be generated during reaction of the modified silicon carbide, and the reducing efficiency of the low-grade tungsten and molybdenum ore can be improved.

The invention relates to the technical field of lithium ion batteries and provides a preparation method of a phosphate anode material, in order to solve the problem that product property is reduced and unstable since impurity elements are introduced during raw material solid phase method synthesis and resistance is relatively large in the dynamical process of doping reaction. The preparation method comprises the following steps: (1) carrying out mixed ball milling on a phosphate and a precursor for 2-8 hours to obtain a mixture; (2) pre-sintering the mixture in inert gas at 300-450 DEG C for 2-12h, thus obtaining a pre-sintered product; (3) carrying out mixed ball milling on the pre-sintered product, a lithium source and a carbon source for 2-8h; (4) sintering the product obtained after ball milling in the step (3) in inert gas at 500-900 DEG C for 4-24h, thus obtaining a sintering product; and (5) fine crushing the sintered product and sieving to obtain the phosphate anode material. With adoption of the preparation method disclosed by the invention, the discharge performance of the product is improved effectively and the homogeneity and stability of the product are also enhanced.

The invention discloses a high-efficiency method for synthesizing high-purity molybdenum disulfide, specifically: firstly, putting molybdenum trioxide powder or molybdenum dioxide powder and sulfur powder into a pulverizer, mixing and pulverizing to obtain a mixed raw material; then mixing the raw material Put it in a crucible, put it in the insulation sleeve of the microwave tube atmosphere furnace, put the insulation sleeve into the quartz tube, seal both ends of the microwave tube atmosphere furnace, pass in argon gas, turn on the microwave heating, keep warm, and cool to room temperature , you can get high-purity molybdenum disulfide. The present invention uses molybdenum trioxide or molybdenum dioxide and sulfur as raw materials, microwave heating, and direct vulcanization method to synthesize high-purity molybdenum disulfide. One-time synthesis does not require high pressure, thiolation and decomposition, shortens the process flow, and improves production efficiency; The molybdenum disulfide obtained by the method has high purity and fine particle size, and is suitable for large-scale production.

The invention provides a method for promoting the quality of oil pyrolyzed from sludge. The method provided by the invention comprises the following steps: mixing sludge, waste biomass and a catalyst according to a weight ratio of 1: (1.0 to 1.5): (0.01 to 0.05); putting the mixture in a fixed bed reactor under a nitrogen atmosphere, segmentally pyrolyzing according to a certain temperature rise program, gradually raising the temperature to 550 DEG C, and condensing generated gas in a condensation device, wherein the yield and the quality of the obtained pyrolyzed oil, which are higher than those of oil pyrolyzed from pure sludge under the same conditions, are respectively: the oil productivity (no water base) is 35% to 45%, the lower calorific value is 30 to 35MJ / kg and the velocity is 15 to 18mm<2> / g. According to the method provided by the invention, the waste biomass and the sludge are co-pyrolyzed, the advantage that the waste biomass and the sludge are pyrolyzed separately is utilized sufficiently to supplement each other, the quality of the oil pyrolyzed from the sludge is promoted, the environmental pollution problem of the two wastes is solved, and clean and high-efficient resource utilization of the two wastes is realized.