48results about How to "Fast reduction reaction" patented technology

The invention discloses a method for preparing nano molybdenum disulphide with a fullerene structure. The method comprises the following steps sequentially: by using industrial molybdenum trioxide as raw material, argon as carrier gas and hydrogen as reducing agent, molybdenum dioxide nano particle is generated by gas-phase reaction; the nano molybdenum disulphide and elemental sulfur are reacted under the condition of high temperature self-pressurization to produce powder material of the nano molybdenum disulphide with the fullerene structure; the molybdenum dioxide is nano particle generated directly by the reaction of the molybdenum trioxide after gasification under 700 to 1,000 DEG C with the hydrogen under 400 to 950 DEG C; the molybdenum disulphide with the fullerene structure is compound molybdenum disulphide by the self-pressurization reaction of the nano molybdenum dioxide and elemental sulfur in a vessel under 500 to 950 DEG C. The method for preparing the nano molybdenum disulphide with the fullerene structure has the advantages of simple process, high production efficiency, low cost of the raw material and product and short reaction time and the method can easily control the size of the molybdenum dioxide nano particle.

The invention relates to a microwave shaft furnace direct reduction process adopting pellets and coal powder. According to the process, direct reduced iron is produced from raw material pellets and external matched material coal powder in a continuous microwave shaft furnace, selection heating, rapid heating, volume heating, activated metallurgical chemical reaction and other features of the microwave are fully utilized, gasification of fixed carbon is accelerated, and iron oxide is further reduced, so that the reduction temperature is lowered and the reaction time is shortened. The coal powder can serve as both a reducing agent and a heating element in the process, a gas-solid-heat exchange step is simplified, energy is saved and emission is reduced. The process contains low free oxygen content, and can produce CO with high purity of 95% or above; and the process is compact in structure, high in metallization degree, which is 94-98%, low in carbon content, which is less than 0.2%, andis low in quality requirements on coal powder, thereby being an environment-friendly iron making process.

The invention discloses a magnetizing and roasting method of an iron oxide ore. The method comprises the following steps: adding a mixed material of which the fineness is -7mm to -10mm to a sealed reaction container, wherein the material comprises the following raw materials: 94.3%-97.1% of iron oxide ore, 1.8%-3.7% of a reducing agent bituminous coal and 1%-2.2% of a catalyst Na2CO3; 1 heating a container to 500 DEG C in a temperature rise zone, reacting C and O2 to generate CO2 and CO, and forming a weak reducing atmosphere by a reaction container; 2 heating a high-temperature zone to 820-850 DEG C, rapidly reacting CO and F2O3 under catalysis of Na2CO3 to generate CO2 and Fe3O4, dissociating Na<+> from Na2CO3, and prompting Fe3O4 crystalline grains to mix and grow; and 3 maintaining the temperature of a thermal insulation zone at 780-820 DEG C, finishing subsequent reducing reaction on CO and unreduced Fe2O3 in the step 2, and mixing the Fe3O4 in the step 3 with the Fe3O4 in the step 2 to grow. According to the method disclosed by the invention, the temperature of reducing reaction is divided into three zones, namely the temperature rise zone, the high-temperature zone and the thermal insulation zone, and full reducing reduction of the Fe2O3 is achieved, so that the magnetic susceptibility of the iron oxide ore is improved; and in addition, a catalyst Na2CO3 is capable of prompting the Fe3O4 crystalline grains to mix and grow; and the magnetic susceptibility is further improved.

The invention relates to a preparation method of a black TiO2 coating, which includes the steps of: 1) under normal pressure and at from room temperature to 200 DEG C, feeding a mixed gas of TiCl4, O2 and a discharging gas into a reaction chamber, and switching on a normal-pressure kHz radio frequency plasma power supply to deposit a TiO2 coating; 2) changing the power supply by a normal-pressure MHz radio frequency plasma power supply, feeding a mixed gas of He and H2, switching on the radio frequency power supply to generate hydrogen plasma, and treating the TiO2 coating at normal temperature to form the black TiO2 coating. The method greatly changes the energy band and photo-response range of the TiO2 material. The black TiO2 coating is improved in absorption in visible light and infrared light zones and is greatly improved in photocatalytic activity under visible light and infrared light. Meanwhile, the black TiO2 coating can be deposited on and coat the surface of materials, such as polymers, so that the black TiO2 coating has important value in practical applications such as dye-sensitized solar cells, hydrogen production with visible light, and environment management, etc.

Belonging to the technical field of organic synthesis, the invention discloses a preparation method of tetrafluorobenzene methanol. The method includes: reacting tetrafluorobenzoic acid with thionyl chloride to produce tetrafluorobenzoyl chloride, then taking tetrafluorobenzoyl chloride as the raw material, and conducting reduction in water with sodium borohydride activated by an ether solvent toobtain tetrafluorobenzene methanol. According to the invention, the ether solvent and sodium borohydride are subjected to complexing to activate sodium borohydride, water is adopted as the solvent forreduction, the reaction yield is high, the reductant sodium borohydride can complete the reaction at a catalytic amount, and the reaction process is greener and more environmentally friendly.

The invention discloses a magnesium smelting technique by microwave heating and relates to the field of magnesium smelting techniques. The upper end of the round wall of a furnace body is connected with an expander by bricklaying through a refractory material, and the lower end of the round wall of the furnace body is fixed with a tray; the expander is movably connected with a support in a sliding manner; the lower end of a microporous ceramic tube is fixed with the tray while the upper end of the microporous ceramic tube is fixed with the support; the furnace body is fixed with a microwave generator and a shell; the shell is fixed with an upper flange and a lower flange; a gaseous magnesium collecting chamber is formed by the wall of the furnace body above the support, an upper convergent section of the shell and the inner side of the upper flange; a gaseous magnesium outlet tube is penetrated from the gaseous magnesium collecting chamber and then is fixed with the furnace body and the shell; a slag chamber is formed by the wall of the furnace body below the tray, a lower convergent section of the shell and the inner side of the lower flange; a magnesium ball is put in the microporous ceramic tube; slag is put in the slag chamber; the power of the microwave generator is 1-500KW, the frequency of the microwave generator is 300-3000MHz, the temperature of the microwave generator is 1200-1350 DEG C, and the smelting time is 15-60 minutes; the magnesium ball is acquired by roasting dolomite to acquire magnesium oxide and calcium oxide and then mixing silicon iron and fluorite with magnesium oxide and calcium oxide. The magnesium smelting technique by microwave heating is used for smelting magnesium, which is a microwave new energy heating technology.

The invention relates to a radioactive three-dimensional nano-structure radiovolt electrochemical cell which comprises an anode, a cathode and electrolyte filling between the anode and the cathode, the anode is composed of a substrate electrode and a semiconductor three-dimensional nano-structure integrated on the surface of the substrate electrode, and at least one of the substrate electrode, the semiconductor structure and the cathode has radioactivity. The substrate electrode can be a radialized substrate electrode in which stable elements are replaced by radioactive isotopes of the same type; the semiconductors can be radialized semiconductors after stable elements are replaced by radioactive isotopes of the same type; the cathode can be a radialized cathode in which stable elements are replaced by radioactive isotopes of the same type. Rays generated by the radioactive isotope comprise alpha particles and beta particles, the alpha particles and the beta particles interact with a semiconductor to generate a large number of electron-hole pairs, holes and electrolyte are subjected to an oxidation reaction under the action of a built-in electric field formed by the solid-liquid heterostructure and migrate to the cathode, electrons are transferred to the cathode through an external circuit and subjected to a reduction reaction with the electrolyte, and a closed loop is formed to generate output current.

The invention provides a radiovolt electrochemical radioisotope battery which comprises an anode composed of a substrate electrode and a semiconductor three-dimensional nano structure integrated on the surface of the substrate electrode, a cathode and a radioactive electrolyte filling in the three-dimensional nano space structure of the anode, the radioactivity of the radioactive electrolyte is obtained by replacing one or more stable elements in the electrolyte with radioactive isotopes of the same type, and rays generated by the radioactive isotopes comprise at least one of alpha particles and beta particles; the radioactive isotope has a half-life period of more than 5 years, and the average energy of radiation particles is not higher than 250keV. Rays generated by the radioactive electrolyte interact with the three-dimensional nanostructure of the anode semiconductor to generate a large number of electron-hole pairs, holes and the electrolyte are subjected to an oxidation reaction under the action of a built-in electric field formed by the solid-liquid heterostructure and migrate to the cathode, and electrons are transferred to the cathode through an external circuit to be subjected to a reduction reaction with the electrolyte, and a closed loop is formed to generate an output current.

The invention provides a method for reducing nitrocompound through biocatalysis. A coenzyme is used as a hydrogen donor, olefin reductase is used as a catalyst, the nitrocompound is subjected to catalytic reduction, and a hydroxylamine compound or an amine compound is generated. The method for reducing the nitrocompound through biocatalysis provided by the invention replaces a conventional methodfor chemically reducing the nitrocompound which is complex, dangerous and polluted in product extraction, the olefin reductase which can be obtained through purchase from the market or prepared by oneself is used as the catalyst, and a quick, simple and effective scheme for reducing the nitrocompound by a biocatalysis method can be established; and the nitrocompound is reduced into the stable hydroxylamine compound or the amine compound, the method has broad substrate applicability, and a high-flux and rapid nitroreduction reaction can be realized.

The invention relates to an organic preparation method of a multifunctional nano-material and especially relates to a high-efficiency preparation method of a rare-earth fluoride nanoparticle. The rare-earth fluoride nanoparticle obtained by the high-efficiency preparation method has a core-shell structure and high photoelectric conversion performances and anti-wear performances. The high-efficiency preparation method of the rare-earth fluoride nanoparticles comprises that trivalent rare earth ions are reduced spontaneously by a hyperbranched polymer in a normal-temperature aqueous solution so that the rare-earth fluoride nanoparticle is produced. The rare-earth fluoride nanoparticle has a core-shell structure composed of a nanoparticle and a hyperbranched compound wrapping the nanoparticle. The reaction system is arranged in an ultrasonic field so that reaction time is reduced and a reaction rate is improved.

The invention discloses a system and method of induction heating liquid mixing continuous magnesium production. The system comprises a silicon iron raw material bin, a magnesium ore raw material bin,a flux raw material bin, a feeding mechanism and a smelting mechanism. Each raw material bin is provided with an inert gas inlet and a vacuuming port. The smelting mechanism comprises an airtight chamber and an induction furnace. The induction furnace is arranged in the airtight chamber. A feeding pipeline and an exhaust gas pipeline are arranged on the top of the induction furnace. The feeding pipeline extends out of the airtight chamber and is connected with a screw conveyer. The exhaust gas pipeline extends out of the airtight chamber. A slag outlet and an iron outlet are arranged on the side on the induction furnace. The induction furnace is further provided with a stirring paddle. The airtight chamber is provided with an inert gas inlet on the side wall. The induction furnace is provided with an inert gas inlet on the side wall. The airtight chamber is provided with a vacuuming port on the top wall. The exhaust gas pipeline is provided with a vacuuming port. According to the system of induction heating liquid mixing continuous magnesium production, because the negative micro-pressure operation or normal-pressure operation is adopted, continuous feeding and discharging can be implemented, continuous production of the metal magnesium is implemented, and the production cost is reduced; and splashing can be effectively reduced, the quantity of soot is effectively reduced, thequality of original magnesium is improved, and the stable running state of equipment is improved.

A gas generator is disclosed. Its features are high gasifying intensity (1600-1800 kg/sq.m.hr), broad spectrum of raw materials including soft coal, hard coal, coal gangue and combustible solid, and low cost.

The invention discloses a method for efficiently recycling manganese in zinc anode mud in a short process. The method comprises the following specific steps of: primary size mixing: uniformly mixing and stirring zinc calcine neutral leaching liquid of a zinc smelting system and the zinc anode mud; primary reduction reaction: feeding ore pulp into a primary reduction reaction kettle, and enabling sulfur dioxide-containing flue gas obtained by the zinc smelting system to be in contact reaction with the ore pulp; and after the reaction is finished, merging obtained supernatant A into a medium leaching thickening system, and enabling the supernatant A to enter a zinc electrolysis system after purification for supplementing Mn < 2+ > in the zinc electrolysis system; secondary size mixing: uniformly mixing and stirring the zinc calcine neutral leaching liquid and zinc calcine of the zinc smelting system; secondary absorption reaction: introducing the ore pulp obtained by secondary size mixing and tail gas subjected to the primary reduction reaction into a secondary reaction kettle for reduction absorption to obtain absorption ore pulp B, and directly merging the absorption ore pulp B into a high-acid leaching system. According to the method disclosed by the invention, manganese dioxide in the zinc anode mud is reduced by utilizing sulfur dioxide produced by a zinc smelting and roasting acid plant, and the reduced liquid is merged into the leaching system to maintain the Mn < 2+ > balance of the system.