64results about How to "Conducive to large-scale industrialization" patented technology

The invention relates to a method for preparing calcium oxide and sulfur from gypsum. The method comprises the following steps: (1) pretreating gypsum: drying dihydrate gypsum to form a dehydrated gypsum with the total water content of 2-10%, grinding the dehydrated gypsum into a gypsum powder; (2) decomposing the gypsum: enabling the gypsum powder in the step (1) to be in contact with a sulfur-containing process gas, reacting at the temperature of 700-1200 DEG C, and finally generating calcium oxide and a sulfur dioxide gas; (3) reducing the sulfur dioxide: enabling the prepared sulfur dioxide gas to be in contact with a carbonaceous reducing agent, reacting at the temperature of 600-1000 DEG C, and generating a sulfur-containing process gas. The sulfur-containing process gas is divided into two strands, one is used for the decomposition reaction of the gypsum in the step (2), and the other is used for producing sulfur through the processes of condensation, catalytic reaction, pelleting and the like. The conversion rate of the gypsum is high, the gypsum is consumed to produce the high value added calcium oxide and sulfur, the source of raw materials is wide, the energy consumption is low, and excellent environmental protection benefit and economic benefit are achieved.

The invention relates to a comprehensive utilization method for resources of a waste lead storage battery. The comprehensive utilization method is a comprehensive utilization process and technology for lead-bearing resources of the waste lead storage battery. The comprehensive utilization method mainly comprises three steps of 'separation of lead plaster in the waste lead storage battery', 'separating preparation of PbSO4, PbO and PbO2 employing the lead plaster as a raw material' and 'preparation of a lead storage battery electrode'. The method is simple in process, convenient to operate and control, low in production cost, few in by-products, high in atom utilization rate, safe and reliable in process and beneficial to large-scale industrialization, and is an effective method for recycling lead resources of the waste lead storage battery.

The invention pertains to the technical field of nano-materials and new energy materials, more particularly relates to a preparation method of nano spinel lithium titanate; the preparation method comprises the steps that: titanium dioxide, metatitanic acid or titanate reacts with alkali liquor with the concentration of 6 mol/L to15mol/L for 6 hours to 48 hours under normal pressure and the temperature of 90 DEG C to 130 DEG C; then, reaction products are washed with water or acid and mixed with an aqueous solution containing lithium ion for ion exchange lasing for 10 minutes to 3 days under normal pressure; then the mixture is filtered to obtain a filter cake which is calcinated to obtain the spinel lithium titanate. In the invention, all reactions are basically carried out under normal temperature and normal temperature, which not only saves the energy consumption and reduces the cost of reaction equipment, but also simplifies the reaction procedures, creates mild reaction temperature, causes the reaction easy to be controlled and is beneficial to the large-scale industrialization of the preparation method.

The invention discloses a method for preparing a negative grid of a lead storage battery, which belongs to the technical field of electrode material preparation. In the method, a lead alloy is used as a raw material, a negative grid formed by pouring molten lead alloy serves as a cathode, a cathodic electrochemical reduction technology is used to perform surface modification in aqueous solution of a rare earth sulfate and sulfuric acid, rare earth is used to improve the performance of the surface of the lead alloy negative grid, and thus, the lead storage battery negative grid with a rare earth-modified lead alloy surface is formed. The method avoids the difficulty in the preparation of a rare earth-lead (Pb-Re) alloy, can dope some trace rare earth elements on the surface of an electrodeeasily, uniformly and quantitatively and realize the adjustment of the surface performance of the electrode. The preparation of a rare earth oxide by an electrochemical method has the advantages of ensuring the high purity of the prepared rare earth oxide, making the domain structure of the rare earth oxide adjustable, along with mild operation conditions, simple operation, low preparation cost and the like, and thus, conditions are provided for process industrialization. In the invention, the preparation method is simple, the preparation is convenient and the process is safe and reliable.

The invention provides a process of producing H2 by way of parallel Fe2+ anodic oxidation and cathodic reduction. The method is carried out in an aqueous solution of sulfuric acid by oxidizing Fe2+ at an anode to obtain Fe3+ and reducing Fe2+ at a cathode to generate Fe, and simultaneously reducing H+ in an catholyte to produce H2. The method provided by the present invention achieves regeneration of Fe3+ at the anode and deprivation of Fe2+ and coproduction of H2 at the cathode; in such a way, paired electrochemical synthesis of obtaining a target product at both the cathode and the anode is realized, allowing effective utilization of double chamber electrodes. The process of producing H2 by way of parallel Fe2+ anodic oxidation and cathodic reduction is simple in procedure, convenient to operate and control, high in efficiency of procedure and energy utilization rate, low in equipment investment and production cost, safe and reliable in procedure, and conducive to large-scale industrialization.

The invention provides a process method of electrochemically preparing Fe3+ and H2 in pair, particularly electrochemical synthesis in pair, wherein the electrochemical synthesis in pair, realizing preparation of Fe3+ by oxidizing Fe2+ and coproduction of H2, comprises the following steps: in an isolating membrane electrochemical rector, performing an oxidizing reaction on Fe2+ at an anode by taking a sulfuric acid aqueous solution containing Fe2+ as an anode liquid to generate Fe3+; and performing a reducing reaction on H+ at a cathode by taking a sulfuric acid aqueous solution as a cathode liquid to obtain H2. The process method provided by the invention realizes electrochemical synthesis in pair where the target products are obtained at the anode and the cathode at the same time, the technical process is simple and convenient to operate and control, the atom utilization ratio of the process is high, the equipment investment and production cost are low, the process is safe and reliable, and large-scale industrialization is facilitated.

The invention discloses a nano solid-core iron phosphate-carbon source-graphene composite material; the surfaces of nano solid-core iron phosphate particles are coated with a carbon source, the particles are connected through graphene, and the nano solid-core iron phosphate-carbon source-graphene composite material is formed. The invention also discloses a preparation method of the material. The process flow is simple, the cost is low, at the same time, nitrate radicals are adopted, and the disadvantages in a traditional process that sulfate radicals in an FeSO4 raw material are difficult to wash cleanly and chloride ions in an FeCl3 raw material have a corrosion effect on equipment are overcome. The prepared lithium iron phosphate positive electrode material has the tap density reaching up to 1.68 g/cm<3>, has large volume specific capacity, is beneficial for preparation of a positive electrode material slurry and coating of an electrode slice, and improves the quality of the electrode slice.

The invention relates to the technical field of human body assistance devices, in particular to an upper limb uplifting assistance device which comprises a base joint, a first rod, a second rod, an arm carrier rod and an arm carrier plate. The first rod is connected with the base joint. The second rod is hinged to the first rod. An energy converter is arranged in the first rod or the second rod. Abearing is arranged at the top end of the energy converter. A cam is fixedly arranged on the second rod or the first rod. The axis of the cam coincides with the hinge point of the second rod and thefirst rod. The rolling bearing is connected with the curve surface of the cam in an abutting-against manner. By the adoption of the cam structure, when the arm droops, acting force of the energy converter to the cam passes through the axis of the cam, accordingly, torque is not generated to the cam, and thus obstruction to natural drooping of the arm is avoided. When the arm is lifted up gradually, the acting force of the energy converter to the cam deviates from the axis of the cam gradually, torque is generated to the cam, the torque pushes the second rod to be lifted upwards, and upliftingassistance to the arm is achieved. Stress supporting points of the base joint are distributed on the waist, and thus the situation that due to long-time use, the shoulders of a user are uncomfortableis avoided.

The invention relates to a method for in-situ preparation of layered double hydroxide anticorrosive coatings on the surfaces of magnesium and magnesium alloys. The method comprises the steps that hydroxide coatings of a metal A element are prepared on the surfaces of the magnesium and the magnesium alloys, and the hydroxide coatings of the metal A element are converted into the layered double hydroxide anticorrosive coatings through chemical conversion; and the A element of the hydroxide coatings of the metal A elements is one of Fe and Mn, and preferably, the hydroxide coatings of the metal Aelements are hydroxyl oxidized iron (FeO(OH) or manganese oxyhydroxide (MnO(OH).

The invention provides a graphite high-temperature antioxidant capable of being quickly dried at normal temperature. The graphite high-temperature antioxidant comprises phosphate, a silane coupling agent, silica sol, a surfactant and a solvent. The application method comprises the following steps: pretreating the surface of the graphite base material, carrying out vacuum pressure impregnation on the graphite base material by using the graphite high-temperature antioxidant which is quickly dried at normal temperature, and standing in a normal-temperature environment for 0.5-1 hour. The graphitehigh-temperature antioxidant capable of being quickly dried at the normal temperature fully wets graphite blocks, enters air holes, seals the air holes and forms a protective layer so that the effectof isolating graphite from oxygen is achieved, and the high-temperature antioxidant effect is achieved. The high-temperature-resistant coating has a good anti-oxidation effect and plays a role in protecting the graphite base material.

The invention discloses a method for preparing high-yield and high-purity agomelatine crystal I. The method comprises the following steps: firstly, dissolving agomelatine into a mixed solvent of dimethyl formamide (DMF) and purified water, wherein the ratio of the DMF to the purified water in dosage is (3:1)-(1:1), the ratio of the agomelatine to the mixed solvent in dosage is 1g:(3-4)mL, and the dissolution temperature is 45-60 DEG C; carrying out suction filtration; slowly adding the obtained filtrate to 20fold frozen purified water at 0-5 DEG C under the agitation at the rotation speed of 180-200r/min; slowly adding for 1.5-2.5 hours; agitating for an hour under the condition at constant temperature of 0-5 DEG C; carrying out suction filtration; rinsing a filter cake by using the purified water; putting the filter cake into a vacuum oven which contains phosphorus pentoxide under the temperature condition at 30-50 DEG C to dry for 36-72 hours, so as to obtain white solid powder. X-Ray-powder diffraction (XRPD) validates that the generated crystal I is agomelatine crystal I, the yield is 93.8-94.9%, the melting point is 98.3-99.3 DEG C, and the purity is greater than 99.5%. The method is mild in reaction condition, detailed in operating procedure, and explicit in experiment condition, the cost and the energy consumption of the reagent are reduced, the condition for achieving industrial production is controllable by controlling each critical process parameter, and large-scale industrialization is facilitated.

The invention relates to a preparation method for a ubenimex gamma crystal form. Through controlling key parameters in the preparation method, the preparation method provided by the invention is capable of obviously increasing the yield of the gamma crystal form and acquiring a single crystal form, has high technological repeatability, is capable of achieving controllable industrial production conditions and is beneficial to large-scale industrialization.

The invention relates to a method for preparing methyl methacrylate from reactive amide salt, which comprises the following steps: (1) sequentially carrying out multiple esterification reactions on the amide salt by using a plurality of esterification reactors connected in series through gas-phase and liquid-phase PTFE-lined pipelines, and collecting the gas-phase material after multiple esterification reactions; (2) discharging the gas-phase material collected in the step (1) into a methacrylic acid separation tower to perform vapor-liquid exchange separation with a gas-liquid separation tank, and adding gaseous ammonia to neutralize to obtain methyl methacrylate; and (3) condensing the methyl methacrylate obtained in the step (2) for multiple times for subsequent processes. According tothe method, the high-purity methyl methacrylate is obtained, and the method is simple and mature in process, easy to control and beneficial to large-scale industrialization.

The invention discloses a conjugated polyelectrolyte photoelectric material containing amphoteric side chains and an application thereof in an organic light-emitting diode device. The conjugated polyelectrolyte photoelectric material containing the amphoteric side chains provide more choices for hole-injection layer materials of an organic light-emitting diode device, and can be used as the hole-injection layer material having wide application prospects for the organic light-emitting diode device.