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

The invention discloses a spring operating mechanism buffer for a circuit breaker. The spring operating mechanism buffer comprises an inner cylinder body and an outer cylinder body which are in sleeved mounting in a clearance manner, wherein a clearance cavity is formed by an outer circumference face of the inner cylinder body and an inner circumference face of the outer cylinder body; a piston for driving hydraulic oil to flow between an inner cavity of the inner cylinder body and the clearance cavity is assembled in the inner cylinder body in a reciprocating motion manner; a through-flow hole for communicating the inner cavity of the inner cylinder body with the clearance cavity and capable of satisfying switch-off performance of the circuit breaker is formed in the inner cylinder body; an acceleration channel is arranged in the outer cylinder body; one end of the acceleration channel is communicated with the inner cavity of the inner cylinder body; the other end of the acceleration channel is communicated with the clearance cavity; and a check valve structure for controlling breakover of the acceleration channel in a switch-on process of the circuit breaker and cutoff of the acceleration channel in a switch-off process of the circuit breaker is arranged on the acceleration channel. The buffer can effectively solve the problem of low switch-on speed in a test process of the circuit breaker, does not influence technical parameters in the switch-off process of the circuit breaker, and improves reliability and stability of circuit breaker products.

The invention relates to a method for synthesizing diphenylmethane diurethane through catalysis of liquid acid in a composite solvent system, in particular for synthesizing 4,4,-diphenylmethane diurethane. In the composite component solvent system, a phenyl carbamate reagent and a methylenation reagent are catalyzed and condensed through liquid organic acid; a composite component solvent can well promote catalytic activity of the liquid acid; and in the process of synthesizing the diphenylmethane diurethane by one-step reaction, the conversion rate of phenyl carbamate as a raw material reaches 97.46 percent, the yield of diphenylmethane diurethane is 86.93 percent, the selectivity of 4,4,- diphenylmethane diurethane in a product can reach 91.56 percent, and only a few byproducts are generated. After the reaction is completed, an MDC product can be separated through filtering and washing; the solvent can be recycled; after recycling, the yield of the MDC can still reach over 80 percent; and the method has good effect and does not cause the waste of the raw materials and the solvent.

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%.

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.

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 relates to a preparation method of special nitrogen-doped molded active carbon for a catalyst carrier, wherein the special nitrogen-doped molded active carbon is high in strength, has anitrogen content of 0.5-10%, a specific surface area of 600-1200 cm<3>/g and a low ash content, and is prepared by taking wood biomass as a starting raw material through nitrogen doping, binder addition, mixing kneading, molding, carbonization and activation. The nitrogen-doped molded active carbon has the advantages of being high in specific surface area, developed in pore structure, high in strength and the like. The supported noble metal catalyst is small in particle size and high in catalytic activity, and shows conversion rate of 100% and product yield of more than 99% in a catalytic hydrogenation reaction of 1,8-dinitronaphthalene. The special nitrogen-doped molded active carbon has the advantages of wide raw material source, environment-friendly production process and the like.

The invention discloses a high-efficiency synthesis method for high-purity molybdenum disulfide. The high-efficiency synthesis method comprises the following concrete steps: putting molybdenum trioxide powder or molybdenum dioxide powder and sulfur powder into a pulverizer for mixing and pulverizing so as to obtain a mixed raw material; and then filling a crucible with the mixed raw material, placing the crucible in the insulation sleeve of a microwave tube type controlled-atmosphere furnace, putting the insulation sleeve into a quartz tube, then sealing the two ends of the microwave tube typecontrolled-atmosphere furnace, introducing argon gas, turning one microwave heating, keeping warm, and carrying out cooling to room temperature so as to obtain high-purity molybdenum disulfide. According to the invention, molybdenum trioxide or molybdenum dioxide and sulfur are used as raw materials and subjected to microwave heating, and direct vulcanization is employed to synthesize high-puritymolybdenum disulfide, so synthesis in one shot is realizesd, and high pressure, thionation and decomposition are not needed, process flow is shortened, and production efficiency is improved; and molybdenum disulfide obtained by using the method has high purity and fine particle size, and is suitable for large-scale production.

The invention discloses a method for assisted synthesis of a porous composite material by using an assistant transfer byproduct. According to the method, an alkaline auxiliary agent is placed in a reaction device and is not in direct contact with reactants, and the amount-of-substance ratio of the auxiliary agent to by-product acid is controlled, so that the porous composite material is obtained through heating treatment in a sealed reaction kettle; and the grain size and distribution of the composite framework material are regulated and controlled; meanwhile, by-product acid in the mother liquor steam is in contact with an alkaline additive to form salt to be fixed, the salt is not returned to the mother liquor anymore; the salt can be used as a by-product for sale, while the mother liquor is directly used as a solvent to dissolve the next batch of reaction raw materials. The whole reaction process is easy to operate, low in operation cost, zero in three-waste emission, high in yieldand easy to realize large-scale production.

A positive electrode active material for a nonaqueous electrolyte secondary battery includes a lithium-nickel-cobalt-zinc composite oxide powder that contains lithium (Li); nickel (Ni); cobalt (Co); element M, which is at least one element selected from the group consisting of manganese (Mn), vanadium (V), magnesium (Mg), molybdenum (Mo), niobium (Nb), silicon (Si), titanium (Ti), and aluminum (Al); and zinc (Zn). A molar element ratio (Li:Ni:Co:M) of the lithium-nickel-cobalt-zinc composite oxide powder satisfies Li:Ni:Co:M=z:(1-x-y):x:y (where 0.95≤z≤1.10, 0.05≤x≤0.35, and 0≤y≤0.10); a zinc content with respect to Li, Ni, Co, the element M, and oxygen in the lithium-nickel-cobalt-zinc composite oxide powder is greater than or equal to 0.01 mass % and less than or equal to 1.5 mass %; and at least a part of a surface of the lithium-nickel-cobalt-zinc composite oxide powder includes a zinc solid-solved region where zinc is solid-solved.

A lithium composite oxide sintered body plate includes a porous structure in which a plurality of primary particles of a lithium composite oxide having a layered rock-salt structure are bonded is included, in which a porosity is 15 to 50%, a ratio of the primary particles whose average inclination angle being an average value of angles between a (003) plane of the plurality of primary particles and a plate surface of the sintered body plate is more than 0° and 30° or less is 60% or more, one or more additive elements selected from Nb, Ti, W are contained, and an addition amount of the one or more additive elements to an entire of the sintered body plate is 0.01 wt % or more and 2.0 wt % or less.