927 results about "Trioxide" patented technology

The invention relates to a lithium ion battery composite cathode material and a preparation method. The cathode material comprises a hard carbon precursor material containing hetero atoms, and natural spherical graphite, wherein the hard carbon precursor material selects one or more than two of phenolic resin, polyfurfural, furan resin, polyvinyl alcohol, epoxide resin or polyacrylonitrile as raw materials, and accounts for 5 to 45 percent of the natural spherical graphite by mass; modifier of the hetero atoms is boron-containing modifier including boric acid and diboron trioxide, phosphor-containing modifier including phosphoric acid and phosphorus pentoxide, and nitrogen-containing modifier HNO3; and one of the modifiers accounts for 5 to 35 percent of the hard carbon precursor by mass. An analog battery formed by the cathode material which is prepared by the method has the capacity over 350 mAH / g and first coulomb efficiency up to 95.8 percent, and has good circulation performance. The preparation method has the advantages of low cost and simple process.

The invention discloses a cable sheath material for a coal mine, which is characterized by comprising the following raw materials for preparing effective constituents according to the parts by weight: 70-100 of butyronitrile-polyvinyl chloride compound, 10-30 of neoprene, 30-60 of white carbon black, 2-8 of magnesium oxide, 20-60 of aluminum hydroxide, 30-60 of chlorcosane, 2-6 of accelerant CZ, 3-8 of zinc oxide, 1-5 of stearic acid, 3-8 of age inhibitor, 4-15 of diantimony trioxide, 2-7 of titanium pigment and 3-9 of vulcanizing agent. The cable sheath material for the coal mine has better performance of stink resistance, cold resistance, flame resistance, oil resistance, ageing resistance, and the like and has good elasticity, high tensile strength, good tear resistance, good extrusion performance and low cost.

Disclosed is a functional type wallpaper material having the air purification function, belonging to the interior decoration material technique field, and containing the components, in weight percentage: 1.5 percent to 2.5 percent of titanium dioxide nano-sized powder, 1 percent to 2.5 percent of silicon dioxide nano-sized powder, 0.5 percent to 1.5 percent of zinc oxide powder, 2 percent to 3.5 percent of negative ion powder, 0.5 percent to 1.5 percent of inorganic antibacterial powder, 0.5 percent to 1 percent of iron trioxide, 4 percent to 6 percent of conductive powder, 2.5 percent to 5 percent of polyaniline, 25 percent to 31 percent of polyvinyl chloride, 5 percent to 5.5 percent of titanium pigment, 15 percent to 18.5 percent of di-n-octyl phthalate dioctyl phthalate, 12.5 percent to 18 percent of calcium carbonate, and 3 percent to 30 percent of auxiliary agent. The wallpaper prepared by the materials can remove formaldehyde and peculiar smell, and is antibacterial and mildew-proof, and can release negative ions and resist electromagnetic radiation, as well as greatly improving the indoor air quality for people and solving the indoor air pollution.

The invention discloses a water purification ceramic material and a preparation method thereof, relating to a ceramic material. The invention provides a water purification ceramic material capable of releasing negative ions, radiating far infrared rays, resisting bacteria, removing residual chlorine, removing heavy metal and purifying water, and a preparation method thereof. Main components of the water purification ceramic material are tourmaline, copper oxide and iron trioxide. Auxiliary components of the water purification ceramic material are at least one of quartz, calcite, kaolin, feldspar, talc, zirconium oxide, titanium oxide, manganese dioxide, cobalt trioxide and the like. The preparation method comprises the following steps of: mixing the main components; then, mixing the mixedmain components with at least one of the auxiliary components; crushing; screening; ball-milling to obtain a mixture; then sintering to synthesize a spinel type copper oxygen body substrate material;crushing and ball-milling the spinel type copper oxygen body substrate material to form a substrate material; with at least one of copper salt, zinc salt, inorganic silver salt and rare earth metal as a metal source, dissolving the metal source in water to prepare a solution; adding the copper oxygen body substrate material to the solution and adsorbing to form a combination body; after sintering, introducing reducing gas; and forming to obtain the water purification ceramic material.

The invention discloses environment-friendly resin crafts and a preparation method thereof. The environment-friendly resin crafts consist of the following components in parts by weight: 100 parts of resin, 50-65 parts of aluminum trioxide, 10-17 parts of aluminum hydroxide, 35-45 parts of crystal sand and 0.3-0.5 part of a curing agent. A preparation process comprises the following steps: (1) fully stirring and mixing 50-65 weight parts of aluminum trioxide powder, 10-17 weight parts of aluminum hydroxide powder and 35-45 weight parts of crystal sand particles to form a mixture; (2) putting the mixture into 100 parts of the resin, then adding 0.3-0.5 part of the curing agent, and uniformly stirring to form a resin solution; (3) injecting the resin solution into a manufactured mold, and performing vacuum pumping and slurry shaking processes according to models of products; and (4) demolding, and then performing blank finishing and bottom grinding to form the environment-friendly resin crafts. The environment-friendly resin crafts disclosed by the invention have the characteristics of low labor force cost, environmental protection and high product grade.

The invention discloses a polyester fabric hydrophilic antistatic agent which consists of the following components by weight percentage: 8 to 18 percent of DMT, 38 to 48 percent of glycol, 16 to 26 percent of polyoxyethylene, 6 to 16 percent of zinc acetate, 4 to 14 percent of diantimony trioxide and 3 to 8 percent of triphenyl phosphate, and the total amount of all the components is 100 percent. Interchange esterification and condensation polymerization are carried out to all the components so as to obtain the hydrophilic antistatic agent. The hydrophilic antistatic agent is adopted to prepare fabric-washing treatment liquid, and during the process the magnesium chloride hexahydrate is added and a two-dipping-two-rolling method is adopted to deal with the polyester fabric, and then the fabric is dried so as to complete the later finishing to the terylene fabric. The hydrophilic antistatic agent of the invention has stable antistatic capability, good washing resistance and low price. Adopting the antistatic agent to the later finishing of dacron can save the baking process of applied process so as to reduce energy cost and enhance the wearing property of polyester fiber and corresponding fabrics so as to meet the simulation requirement to polyester fabrics of costume fabric market.

The invention relates to alkali-free glass for the production of continuous glass fiber product and production process thereof, pertaining to inorganic non-metallic material field. The main production raw materials of the alkali-free glass comprise quartz sand, limestone, pyrophyllite and dolomite; wherein, the production processes comprise proportioning, melting, fiber forming, fiber drawing and product processing; the temperature for fiber forming is 1160-1360 DEG C, the viscosity is 1000 poises and liquid phase temperature is at least 97 DEG C lower than that of the fiber forming; the weight proportions of compositions to the product are respectively that: silicon dioxide is 58-62 percent, calcium oxide 20-24 percent, aluminum oxide 12-14 percent, magnesium oxide 2-4 percent, fluorine 0-0.6 percent, potassium oxide and sodium oxide 0-2 percent in total, titanium oxide 0-2 percent, iron trioxide 0-0.6%, sulfur trioxide 0-0.6% and micro impurity 1%. By adjusting the variety and proportion thereof of glass raw materials, the invention removes fluoride materials such as fluorite and boride such as borocalcite from raw materials of glass, thereby controlling the origin of the waster gas pollutants.

The invention relates to a tungsten trioxide (WO3) nano-plate and a preparation method thereof. The tungsten trioxide (WO3) nano-plate is characterized in that: the tungsten trioxide (WO3) nano-plate is monocrystal and monoclinic phase (JCPDS No.43-1035), and is shaggy and flocculent; the area is (100-800)nmx(100-800)nm; the apparent thickness is between 5 and 40 nanometers; and the BET specific surface area can reach 100-250 square meters per gram. The preparation method for the tungsten trioxide (WO3) nano-plate comprises the following steps that: a tungstenic acid organic or inorganic laminated mixed micron / nano belt (pipe) is taken as a precursor, and organic substances between precursor layers are removed through oxidation by a nitric acid, and then a tungstenic acid (WO3.H2O) nano-plate is prepared; the reaction temperature is between 15 and 50 DEG C, and the reaction time is between 5 and 120 hours; the tungstenic acid (WO3.H2O) nano-plate is heated up to between 250 and 600 DEG C at a heating rate of between 1 and 5 DEG C per minute, undergoes heat insulation for 1 to 5 hours, and finally naturally cooled to the room temperature so as to remove crystal water, and the tungsten trioxide nano-plate is prepared. The method has a simple technological process, a large variation range of operating parameters, strong adaptability, low facility requirement, controllable appearance of products, high repeatability, high efficiency and low cost.

The invention belongs to the pearlescent pigment preparation process field, particularly relating to a preparation process of mica titanium pearlescent pigment. The process of the invention comprises adopting titanium tetrachloride solution which is partially transformed into titanyl sulfate, ferric trichloride solution and ferrous chloride solution or mixed solution of titanium salt and iron salt as deposition agent, adopting carbamide as neutralizing agent, wherein carbamide adopts the way of filling in batch, and hydrolyzing titanium salt, iron salt or mixed salt of titanium salt and iron salt to prepare mica pearlescent pigment. The process of the invention has the advantages of simple making art and easy operation, and the mica pearlescent pigment product which is prepared has even and compact titanium dioxide, di-iron trioxide film structure on the surface of the product, silver white product has high whiteness and strong pearlescent effect, and neon or color product has saturated color and strong pearlescent effect.

The invention relates to a manganese oxide-graphite phase carbon nitride composite photocatalytic material and a preparation method thereof. The manganese oxide-graphite phase carbon nitride composite photocatalytic material is prepared by depositing manganese oxide nanoparticles on the surface of layered graphite phase carbon nitride, and the manganese element loading capacity of manganese oxide in the composite photocatalytic material is 0.3-1.2 mol%; manganese dioxide or trimanganese tetroxide or dimanganese trioxide or a mixed oxide of manganese dioxide, trimanganese tetroxide and dimanganese trioxide is adopted as manganese oxide. Manganese oxide in the composite photocatalytic material is uniformly loaded on graphite phase carbon nitride, the loading capacity is controllable, the good catalytic capacity is achieved, a manganese oxide cocatalyst is closely combined with graphite phase carbon nitride, therefore, the defects that a single photocatalyst is high in photoproduced electron hole pair composite ratio and low in photocatalytic efficiency are effectively overcome, the solar utilization efficiency is greatly improved, and the excellent catalytic activity is achieved when the composite photocatalytic material is used for photocatalytic hydrogen production. The composite photocatalytic material has the wide application prospect in the fields of photocatalysis, electrochemistry, energy, environments and the like.

The invention discloses a method for preparing hexamethylene diamine by direct hydrogenation of adiponitrile under alkali-free conditions. The method comprises the steps of using an alkaline earth metal oxide or rare earth metal oxide prepared by a coprecipitation method for modifying an aluminium trioxide-supported metallic nickel catalyst under a condition of no need of adding alkali or ammoniawater, directly hydrogenating an adiponitrile ethanol solution at a temperature of 60 to 200 DEG C, under pressure of 3 to 8 MPa, and obtaining high-qualityhexamethylene diamine through vacuum distillation of a resulting product. The method is suitable for using in batch tank reactors and also in continuous fixed bed reactors.

The invention discloses a preparation method of an iron trioxide / graphene composite material, a negative electrode of a lithium-ion battery and the lithium-ion battery. The preparation method comprises a hydrothermal procedure and a compound procedure. According to the preparation method, iron trioxide nanoparticles are uniformly loaded on the surface of three-dimensional graphene and in a pore structure; and the iron trioxide / graphene composite material is obtained through washing and drying. The material is applied to the lithium-ion battery and has excellent properties of high capacity, long cycle lifetime, low cost and the like; and mass production is easy to implement.

This invention relates to a polyetheretherketone composite material, composed of a binary composite of polyetheretherketone and one of molybdenum disulfide, aluminium trioxide, copper powder, silica dioxide or stainless steel powder, with weight ratio of 80-99.9:0.1-20. On the base of the above weight as 100%, it continues to add polytetrafluoroethylene or polyphenyl ester, with weight ratio of 0.1-80% and 0.1-20% respectively, to form the ternary polyetheretherketone composite material. On the base of the above binary or ternary composite weight, it continues to add carbon fiber or glass fiber, with weight ratio of 0.1-50%. This invented composite material is characterized of increased thermal conductivity factor, distinct improvement of tensile strength, ball indentation hardness, frictional factor and linear expansibility, and cost reducing.

The invention discloses a formulation of an AC zinc oxide resistance chip. The formulation is characterized by comprising the following additives and a main material ZnO by weight percentage: 4.0 to 4.9 percent of Bi2O3, 3.0 to 4.0 percent of Sb2O3, 0.5 to 1.0 percent of SiO2, 2.0 to 3.0 percent of Co2O3, 0.50 to 0.80 percent of Cr2O3, 0.50 to 0.80 percent of MnCO3, 0.70 to 0.90 percent of NiO, 0.03 to 0.05 percent of aluminum nitrate, 0.10 to 0.20 percent of glass dust, 0.07 to 0.10 percent of B2O3 and 85.0 to 88.0 percent of ZnO. The formulation of the resistance chip has the following characteristics and advantages: the nickel protoxide and the glass dust are introduced into the formulation, so that the stability and the aging performance of the internal structure of the resistance chip is more excellent; and 2, dosage of cobalt sesquioxide, dibismuth trioxide and diantimony trioxide are added in the formulation, the mixture ratio of each composition is more reasonable, and the non-linearity coefficient of the resistance chip can be improved, the pressure ratio is reduced, the circulation capability is improved, and the comprehensive performance is excellent.

Process for the preparation of O-sulfated K4, K5 and K40 polysaccharides useful for the treatment of tumoral, HIV-1 and coagulation pathologies and in cosmetic preparations, wherein the K4, K5 or K40 polysaccharide in the form of sodium salt is suspended in an aprotic solvent and directly submitted to the reaction of O-sulfation with a pyridine-sulphur trioxide or trimetylamine-sulphur trioxide adduct or with chlorosulfonic acid.

The invention discloses a method for synthesizing N-benzyl maleimide from an immobilized supported acid catalyst and belongs to the synthesis technical field. The method comprises the following steps: soaking silica gel, a molecular sieve, aluminum trioxide and acidic resin or an active carbon carrier in an acid solution in equal volume, drying the mixture to obtain a supported catalyst and putting the supported catalyst into a stainless steel net; adding aniline and maleic anhydride into a benzene, toluene or xylene solvent and acidylating, stirring and heating the mixture to obtain the N-benzyl maleimide acid solution; then adding the N-benzyl maleimide acid solution, a polymerization inhibitor and the supported catalyst into a dehydration reactor for dehydration cyclization, reducing the pressure to remove the solvent and obtain the N-benzyl maleimide crude product, and recrystallizing in the solvent to obtain the N-benzyl maleimide. The invention has the advantages of high yield of N-benzyl maleimide, low content of waste acid, few production flows, low cost and little discharge of acid-containing waste water; moreover, as the catalyst is immobilized, the invention simplifies the replacement of the catalyst, reduces the mechanical abrasion of the catalyst and prolongs the service life of the catalyst.

The invention discloses a boron-doped silicon-based negative electrode material used for a lithium ion battery. The boron-doped silicon-based negative electrode material is prepared from a boron-doped nanometer silicon material and graphite in a compounding manner, wherein the mass percentage of the boron-doped nanometer silicon material is 3-100%, and the balance is graphite. Diboron trioxide is gradually diffused to the silicon negative electrode material in a high-temperature sintering process to replace a part of silicon atoms to form displacement type doping, so that vacancy carrier concentration in the nanometer silicon material is improved, thereby improving the intrinsic electron conductivity of the silicon material; volume expansion of the silicon material can be buffered by graphite; and the boron-doped silicon-based negative electrode material has simple preparation process, convenience in operation, natural and easily available raw materials, low cost, convenience in subsequent processing mode, and easy realization of large-scale production.

An environmental protection cold resistance soft sheathing material is mainly prepared by the following materials according to the parts by weight: 40-45 pars of polyvinyl chloride, 5-7 parts of trioctyl trimellitate, 4-6 parts of dioctyl sebacate, 8-10 parts of dioctylphthalate, 5-7 parts of phthalandione (2- propyl heptylasetate) diester, 4-6 parts of ca-zn composite stabilizer, 1-1.5 parts of epoxidized soybean oil, 1-1.5 parts of diantimony trioxide, 10-13 parts of magnesium hydrate, and 10-13 parts of refined calcium carbonate. The sheathing material has excellent cold resistance and environmental protection performance, low cost and high softness, and simultaneously the physical property of the sheathing material meets the European Union electronic apparatus ROHS commands and UL requirements. Based on the environmental protection cold resistance soft sheathing material, environmental protection cold resistance soft coaxial-cables which meet the UL requirements are successfully developed, thus technically solving the technical difficulties of softness, cold resistance, UL mechanical physical property and the like which are difficult to be achieved completely, meeting the strict requirements of the application of products on cold regions and having remarkable social effect.

The invention relates to a rhodamine fluorescent probe for detecting Fe <2+>, and a preparation method thereof. The preparation method comprises the following steps: enabling rhodamine 6G and hydrazine hydrate to perform reflux reaction in alcohol to generate rhodamine hydrazide, then enabling rhodamine hydrazide and 2,6-diacetylpyridine to perform reflux reaction in alcohol, and through neutral aluminium trioxide column chromatography purification, obtaining the rhodamine acylhydrazone and acetyl pyridine fluorescent probe. The fluorescent probe is high in synthesis productivity, quick in reaction and high in selectivity, has high specificity to Fe <2+>, can work under the physiological environmental condition with the pH value of 7.4, and has a prospect of being applied to bioluminescence imaging.

The invention discloses a sizing formula of a flame-retarding elastic support rubber product. The sizing formula is characterized in that components of the rubber product are as follows (parts by mass of each component are shown in brackets): 21-type-322 neoprene (25-35), standard 1# natural rubber (65-75), zinc oxide (7-9), light magnesium oxide (4-6), sulfur (0.1-1.0), an accelerant CZ (1.3-1.7), an accelerant Na-22 (0.4-0.6), an ageing inhibitor 4,010 (0.8-1.2), 2,500-mesh diantimony trioxide (15-25), 2,500-mesh aluminium hydroxide (50-60) and semi-reinforcing carbon black (10-20). In the invention, unvulcanized rubber is a combination of the neoprene and the natural rubber, a vulcanizing system is a combination of metal oxide and the sulfur, a flame retardant is a combination of the diantimony trioxide and aluminium hydroxide, and the semi-reinforcing carbon black is used for reinforcing; therefore, the prepared rubber product has good physicochemical properties, especially has high oxygen index and low smoke index. The invention is applicable to preparing the elastic support rubber product used between a floor board and a floor board framework when floor boards are laid in a public place and on a passenger train, a subway as well as a bus.

The invention discloses high-adsorptivity ceramic. The high-adsorptivity ceramic is prepared from 22-33 parts by weight of diatomite, 25-47 parts by weight of activated carbon powder, 12-21 parts by weight of polyethylene powder, 5-15 parts by weight of zeolite powder, 10-15 parts by weight of water soluble starch, 21-43 parts by weight of tourmaline, 2-3 parts by weight of nano-silver, 1-4 parts by weight of nano-zinc, 5-12 parts by weight of alumina, 0.5-1.2 parts by weight of iron trioxide, 2-11 parts by weight of titanium dioxide, 10-18 parts by weight of calcium oxide and 30-47 parts by weight of kaolin. The invention also discloses a preparation method of the high-adsorptivity ceramic. Water soluble starch is heated to gasify and decompose so that submicron-level micropore ceramic for adsorbing or filtering very fine bacteria is prepared. The active carbon has a porous structure. Through cooperation of active carbon powder and tourmalinite, a shrinkage rate is low, flexural strength is high and formaldehyde and sulfur dioxide harmful substance adsorption rates are high. The nano-silver and alumina can fast form active oxygen for sterilization, algae extermination and organic matter decomposition when contacting with water so that the high-adsorptivity ceramic has good use effects.

The invention discloses a compounding method for a nanometer ultrathin boron carbon nitrogen sheet and belongs to the technical field of material preparation. The method comprises the following steps: mixing diboron trioxide, melamine, glucose and the mixed salt of NaCl and KCL, then grinding, and performing heat treatment on the acquired powder under the atmosphere of ammonia gas, thereby acquiring the nanometer ultrathin boron carbon nitrogen sheet. According to the invention, the low-cost mixed salt and the boron carbon nitrogen precursor have a heating reaction under the atmosphere of ammonia gas, and the fused mixed salt is utilized as a template of the boron carbon nitrogen sheet, is evaporated at high temperature and is peeled, so that the nanometer ultrathin boron carbon nitrogen sheet characterized by having a graphite like phase crystal structure, the thickness of an atom-level ultrathin sheet, a huge size and a high specific area can be prepared. The compounding method disclosed by the invention is simple in operation; complex and expensive instruments and equipment are not required; the adopted raw materials are low in cost and are easily acquired; the environmental pollution is little; the method is suitable for large-scale production; and the compounding method has significance in boosting the application of the nanometer ultrathin boron carbon nitrogen sheet in the fields of photoelectric materials, organic catalysis, hydrogen storage carriers, detection analysis, and the like.

The present invention is concerned with a process and a plant for the production of sulphuric acid wherein a sulphur dioxide-containing feed gas is converted, at least in part, with oxygen in at least two contact stages of main contacts arranged in series, to generate sulphur trioxide, and wherein generated sulphur trioxide-containing gas is conducted to an absorber and converted therein to sulphuric acid. In order to be able to economically process feed gases of a sulphur dioxide content of between 13 and 66% by volume to sulphuric acid, using conventional catalysts, it is suggested to withdraw from a contact stage connected upstream of the last main contact stage, a partial stream of the sulphur dioxide- and sulphur trioxide-containing gas, to mix the said partial stream with the feed gas to generate a contact gas of a sulphur dioxide content of more than 13% by volume, and to return the same to the first contact stage.

A method is about using coal ash to degrade organic wastewater. The steps are: a. fully mixing coal ash and waste-water, the quality ratio is 0.8%-1.5%; b.adjusting the pH value of waste-water mixture as 1-4; c. adding hydrogen dioxide in the waste-water mixture to form allied Fenton reagent with soluble metallic ion in coal ash; d. letting waste-water getting acrossing the glass or earthenware duct have microwave field in 3-5min; e. finally, filtration, deposition, checking and collecting coal ash contains contaminant, discharging or circularly utilizing treated water. This invention ably utilizes the di-iron trioxide and so on transition metal oxide which contained in coal ash, forming the allied Fenton reagent with hydrogen dioxide; the multicellular structure of coal ash can absorb the microwave effectively, adsorbing-catalytic oxidation for organic matter by the stimulation of microwave, reaching the purpose of advanced oxidation treatment; improving the clearance for COD greatly; also saving the setting of biochemistry pool, reducing the dealing cost of waste-water.

The invention discloses a magnetic core material to which a rare earth element is added. The magnetic core material is prepared from, by weight, 60-65 parts of hydroxy iron powder, 10-15 parts of iron trioxide, 25-27 parts of manganese oxide, 21-23 parts of zinc oxide, 4-5 parts of silane coupling agent kh570, 5-7 parts of organic silicon resin, 1-2 parts of polyvinyl alcohol, 7-9 parts of sodium silicate, 0.6-0.7 part of carbon-coated lanthanum oxide, 0.5-0.6 part of barium sulfate, 0.5-0.6 part of bentonite and a proper amount of water. The prepared magnetic core material has the high initial permeability, good temperature stability, small magnetic hystersis losses, and is good in applicability in various fields and worthy of being popularized.

The invention discloses a preparation method of a carbon coated stannic oxide (SnO2)-iron trioxide (Fe2O3) composite oxide material. During the preparation of the material, a polyaniline layer is introduced on the surface of a composite oxide by in-situ polymerization, and the carbon coated SnO2-Fe2O3 composite oxide material is obtained by a calcination method. The composite oxide material prepared by the method has the advantages of controllable particles, uniform thickness of a carbon layer; and the composite oxide material as a negative electrode material for a lithium ion battery has the characteristics of high lithium storage capacity and excellent cycling performance.

The invention provides an unleaded glass powder used for electronic paste and a preparation method thereof. The unleaded glass powder is composed of the following components by mass ratio: 10-60% of diboron trioxide, 2.5-30% of silicon dioxide, 30-75% of bismuth trioxide, 0.1-5% of sodium oxide, 0.1-3% of calcium oxide, 0.5-10% of strontium oxide, 1.5-20% of titanium dioxide, 0.5-8% of zirconium oxide, 0.1-5% of stannic oxide, 0.5-6% of aluminium oxide, 0.5-5% of antimonous oxide and 0.1-5% of calcium fluoride, the components are fully mixed to be uniform and then heated to 1050-1250 DEG C, and heat preservation is carried out for 30-120min, so that raw material is fully melted into glass metal, the glass metal is poured into deionized water to be quenched into glass granules, and ball milling into 320-400 meshes is carried out, thus obtaining the unleaded glass powder. The invention provides an unleaded glass powder with low softening temperature, good chemical stability, appropriate expansion coefficient, acid-base resistance, good abrasive resistance, wide sintering temperature range, low manufacturing cost and no toxic heavy metal oxide, and the unleaded glass powder has wide application range.

The invention relates to a microwave synthesis method for a multi-element lithium manganate-doped positive electrode material of a lithium ion battery. The method comprises the following steps: adding deionized water into raw materials comprising lithium carbonate micropowder, industrial pure electrolytic manganese dioxide micropowder, analytical pure magnesium oxide micropowder, nickelic trioxide micropowder and chromic oxide micropowder to perform wet combination; mixing the raw materials with a ball mill; drying; mixing and sieving the dried products to serve as crude materials; shaping the crude materials into green bodies, and putting the green bodies into a microwave oven for sintering; and after the sintering is finished, taking the materials out, crushing and sieving the materials to obtain the lithium manganate-doped positive electrode material of the lithium ion battery. The material serving as a positive electrode active material can be used for preparing a positive plate of the lithium ion battery. The method has the characteristics of simpleness, energy saving and consumption reduction, low cost and contribution to industrial production; and the assembled lithium ion battery has the advantages of high initial discharge capacity and high charge and discharge cycling performance. The lithium manganate-doped positive electrode material of the lithium ion battery obtained by the method can be applied to electric automobiles, mobile phones, laptops and other equipment.

The invention discloses a production method for preparing an m-nitrobenzenesulfonic acid by a tubular sulfonation reactor and relates to the production method of a chemical product. A production device comprises a nitrobenzene storage tank (1), a sulphur trioxide storage tank (2), the tubular sulfonation reactor (3), a kettle sulfonation reactor (4), a material delivery pump (5), a spraying pump (6), a connecting pipeline and accessories (a valve, a flow meter, a thermometer, an anti-explosion film, sight glass and the like). Nitrobenzene and a sulphur trioxide sulfonating agent enter the tubular sulfonation reactor (3) in proportion, the tubular sulfonation reactor (3) and the kettle sulfonation reactor (4) are used in series, or the tubular sulfonation reactor (3) is used independently.The invention is applied to continuous or discontinuous sulfonation reaction, good in mixing and heat transfer effects, high in reaction speed, high in production efficiency and high in operational flexibility. The production device and the production method which are provided by the invention are applied to various sulfonation reaction production processes.