1095results about How to "Rich reserves" patented technology

The invention discloses a rechargeable aluminum ion cell and a preparation method thereof and belongs to the field of energy reutilization. The cell comprises an anode, a cathode, a liquefied aluminum ion electrolyte and a diaphragm material, wherein the anode is made of graphite structure carbon material; the cathode is made of highly pure aluminum; the liquefied aluminum ion electrolyte is formed by mixing anhydrous aluminum chloride and 3-methyl imidazole compound; the molar ratio between the anhydrous aluminum chloride and the 3-methyl imidazole compound is from 1.1:1 to 1.6:1. The preparation process of the cell comprises the following steps: processing the graphite structure carbon material into laminar shapes; fixing the anode material with inertial metal foil as a current collector and covering the anode with the diaphragm material; washing highly pure aluminum cutting piece as the cathode; preparing the liquefied aluminum ion electrolyte which contains A13 plus ion capable of freely moving. The anode, the cathode and the liquefied aluminum ion electrolyte are assembled in a glove box to form the cell; the cell has the characteristics of high capacity and good circulating stability and is applicable to multiple fields such as electronic industry, communication industry and electric automobile.

The present invention is method of comprehensively utilizing waste SO2 gas resource and pyrolusite, and the method includes utilizing the composite absorbent comprising pyrolusite slurry and pH buffering agent to produce oxidation-reduction and neutralizing reaction with waste SO2 gas to eliminate SO2 from the waste gas, purifying the absorbed tail liquid to obtain manganese sulfate product through direct evaporating crystallization or metal manganese product through DC electrolysis, and treating the anode liquid to obtain high purity manganese carbonate product and ammonium sulfate product. The present invention realizes treatment of waste with waste to recover sulfur resource and comprehensively utilize pyrolusite. The method of the present invention is reasonable and has no secondary pollution.

The present invention provides a welding flux material for submerged arc welding for welding high-grade line pipe steel and other structure steel. Its chemical composition includes (by wt%) 15%-25% of CaF2, 15%-25% of MgO, 15%-20% of Al2O3, 5%-10% of MnO, 5%-10% of TiO2, 10%-15% of SiO2, 5%-10% of CaO, 1.0%-2.5% of Na2O, 1.5%-3.0% of B2O3, 0.2%-0.4% of Re(Mg) and 3%-5% of ZrO2. Said welding flux material can be prepared by adopting sintering process. Besides, said invention also provides its application method.

The invention relates to a cerium-based catalyst, and relates to an application of the cerium-based catalyst in methane oxyhalogenation methods used for preparing halogenated methane. The methane oxyhalogenation methods used for preparing halogenated methane comprise a methane chlorine oxidation method used for preparing methyl chloride and a methane bromine oxidation method used for preparing methyl bromide. The cerium-based catalyst is suitable to be used in methane oxyhalogenation reactions. The cerium-based catalyst can be a CeO2 catalyst, a cerium-based bi-component composite oxide catalyst, a load-type cerium-based oxide catalyst, or the like. With the cerium-based catalyst, the methane oxyhalogenation reactions including a chlorine oxidation reaction and a bromine oxidation reaction can be effectively and stably catalyzed, and methyl chloride and methyl bromide can be prepared. With the cerium-based catalyst, reactants such as CH4, HCl and O2 can be catalytically converted with high efficiency for carrying out a chlorine oxidation reaction, such that products CH3Cl and CH2Cl2 are produced. Also, with the cerium-based catalyst, reactants such as CH4, HBr(H2O), and O2 can be converted with high efficiency for carrying out a bromine oxidation reaction, such that products CH3Br and CH2Br2 are produced.

The invention relates to an aluminium ion battery and a preparation method thereof and belongs to the field of aluminium ion batteries and preparation thereof. The aluminium ion battery comprises a positive electrode, a negative electrode and an aluminium ion electrolyte, wherein the positive electrode is made of transition metal oxide; the negative electrode is made of high purity aluminium; the battery comprises a diaphragm material when the aluminium ion electrolyte is in a liquid state. Since abundant aluminium elements are stored, the cost for the ion battery is greatly reduced; the safety performance is improved; the transition metal oxide is applicable to hypervalent ion batteries due to relative stability under the variable valence states and different valence states. The ion liquid serves as the electrolyte for the hypervalent ion battery, so that aluminium ion is high in conductivity, good in heat stability, broad in electrochemical window and high in chemical stability and almost incapable of reacting with the positive electrode materials, the negative electrode materials, a current collector, a binder and a diaphragm in a battery system and capable of maintaining the liquid state in a board temperature range. The aluminium ion battery can be applied to various fields, such as electronic industries, communication industries and electric vehicles and the like.

The invention discloses a method for preparing graphene from raw graphite ores through electrolysis. The method comprises the steps of crushing raw microcrystal graphite ores, sieving, and recycling raw materials which are not insufficiently crushed; preparing an electrode from raw microcrystal graphite ore powder or insufficiently-delaminated raw ores; electrolyzing the prepared electrode in an electrolytic tank, carrying out solid-liquid separation, and further delaminating a solid obtained by separation to obtain the insufficiently-delaminated raw ores and coarsely-prepared graphene; and separating and extracting graphene from the coarsely-prepared graphene. The method has the advantages of low cost, simple preparation process and device, simplicity in operation, good product quality, high process safety and large-scale production.

The invention relates to a novel environment-friendly heat insulating coating and a preparation method thereof. The novel environment-friendly heat insulating coating comprises the following components in percentage by weight: 10 to 50 percent of film forming matter, 1 to 3 percent of expanded vermiculite, 5 to 25 percent of meerschaum, 1 to 20 percent of hollow microspheres, 0.5 to 5 percent of wetting agent, 0.5 to 5 percent of dispersing agent, 0.5 to 5 percent of defoaming agent, 0.5 to 5 percent of silane coupling agent, 1 to 10 percent of auxiliary agents, and 10 to 50 percent of solvent. The preparation method comprises the following steps of: grinding, vacuum filtrating, drying, grinding, screening and drying the expanded vermiculite, and then evenly mixing the dried expanded vermiculite with the dried meerschaum and the hollow microspheres to form a component A; mixing the film forming matter, the solvent, the wetting agent, the dispersing agent, the defoaming agent, the silane coupling agent and other auxiliary agents to obtain a component B; and evenly mixing the components A and B, and defoaming the mixture to obtain the heat insulating coating of the invention. The prepared insulating coating is coated on the surface of a working surface, is cured at the normal temperature and completely dried to achieve the effects of heat preservation and heat insulation.

The invention relates to a carbon dioxide electrochemical reduction catalyst as well as a preparation method and an application thereof. The carbon dioxide electrochemical reduction catalyst comprises tin dioxide nanoflower, wherein the tin dioxide nanoflower is synthesized through hydrothermal reaction and comprises the synthesis raw materials including 0.1-0.5M of tin dioxide, 1-5M of trisodium citrate mixed solution and 0.1-0.5M of sodium hydroxide. The carbon dioxide electrochemical reduction catalyst is applied to a carbon dioxide electrochemical reduction catalyst gas diffusion electrode. The carbon dioxide electrochemical reduction catalyst has the advantages that the specific surface area of the catalyst is enlarged, the electrochemical reduction catalytic activity of the catalyst for carbon dioxide reduction is improved, the hydrogen evolution reaction is effectively inhibited, and the selectivity of formic acid in a product is improved.

The invention relates to a method for preparing hydrogen through photoanode-photovoltaic battery coupled dual-illumination fully-photic-driven decomposition of water. Efficient decomposition of water is realized under sunlight illumination conditions by using coupling of a photoelectrocatalysis technology with a photovoltaic battery technology, adopting a water oxidation cocatalsyt modified semiconductor material as a photoanode, placing a proton reduction cocatalyst modified Si battery in an electrolyte as a photocathode, directly connecting the positive electrode of the Si battery with the anode through a lead and allowing the surface of the cathode to contact with the electrolyte. The method realizes fully photic driven decomposition of water without applied bias conditions, and the solar energy utilization efficiency STH of the method reaches 2.2% or above.

The invention discloses a method for recovering vanadium in vanadium-titanium magnetite ore. The method comprises the process steps of: (1) mixing, pelletizing or briquetting, vanadium-titanium magnetite ore, a calcium additive and an adhesive, drying and oxidizing roasting to obtain roasting clinker; (2) performing carbonation leaching on the roasting clinker by utilizing leaching solution containing CO3<2->, and performing solid-liquid separation to obtain calcium-contained iron ore slag and chrome-vanadium-contained dissolving solution; and (3) adding a reagent with NH4+ into the dissolving solution for ammonia settlement, so as to obtain ammonia vanadate, or adding acid liquor into the dissolving solution, and directly acidifying to obtain V2O5. By adopting calcified roasting-carbonation leaching, the vanadium in the vanadium-titanium magnetite ore is recovered, obtained sintered pellets containing the calcium-contained iron ore slag can be directly applied to blast furnace smelting; and therefore, the problem of recovering the vanadium in the vanadium-titanium magnetite ore is effectively solved, and subsequent blast furnace smelting is not influenced. After the vanadium is recovered by using the method, chromium can be recovered from obtained crystallizing mother solution; and therefore, the vanadium-titanium magnetite ore is effectively and comprehensively utilized.

The invention discloses a making method of nanometer crystal Li-Ti composite oxide, which comprises the following steps: adopting titanium powder or titanium compound as raw material; blending the materials with 30% hydrogen peroxidate under low temperature; adding certain quantity of lithium salt solution and moulder; stirring evenly; reacting under water bath condition at 50-100 deg. c completely; drying the composite system directly to produce predecessor; proceeding heat disposal for the predecessor at 200-400 deg. c for 2-6h; heating to 600-1000 deg. c; sintering 8-36h; cooling; grinding; obtaining the nanometer crystal Li-Ti composite oxide with spinel structure and the content of Li4Ti5O12 over 90%; controlling the even grain size of the product between 15nm and 100nm and specific surface area between 10 and 100m2 / g due to different aperture shape of moulds, sintering time and temperatures; making the reversible specific capacity of the product over 160mAh / g under 0. 1C charging and discharging condition; keeping the capacity maintaining rate between 50% and 70% under discharging condition at 100deg. c as ideal negative electrode material of lithium ion dynamic battery and lithium ion super-capacitance.

Belonging to the technical field of batteries, the invention relates to a non-aqueous solution aluminum ion secondary battery and a preparation method thereof. The secondary battery can be widely applied in electronics, communication, electric vehicle and other fields. The aluminum ion battery provided by the invention contains a battery anode, a battery cathode, a diaphragm and an aluminum-containing non-aqueous solution electrolyte. Specifically, the cathode active material can be carbon, graphite, carbon nanotube, graphene, super carbon, WS2 and MoS2, V2O5, TiO2 and other materials having nano-layered, tubular, linear and other structures, and the anode is aluminum-containing metal or alloy. The non-aqueous solution aluminum ion secondary battery provided by the invention has the characteristics of high specific capacity, high coulomb efficiency, long service life and environmental protection, safety and reliability, stable cycle performance, and quick charging, etc.

The invention discloses a graphene / montmorillonite nano composite material, and a preparation method and application thereof. The preparation method of the graphene / montmorillonite nano composite material is as below: uniformly mixing cetyl trimethyl ammonium bromide modified montmorillonite suspension and graphene oxide suspension subjected to ultrasonic treatment, fully stirring, adding a reducing agent for reduction, so as to obtain a black flocculent precipitate after the reaction, and conducting washing, suction filtration, drying, grinding and screening to obtain the graphene / montmorillonite nano composite material. The graphene / montmorillonite nano composite material prepared by the method can be used as an adsorbent in the field of water pollution control, especially adsorption and removal of the heavy metal pollutants in wastewater, and has the advantages of simple preparation method, high adsorption speed, easy regeneration, and reuse. The raw materials have wide sources, low cost and high actual application value.

The invention relates to a preparation method for a zirconium-contained rare-earth composite oxide. At a certain ratio, rare earth (cerium, yttrium, praseodymium or terbium) is mixed with zirconium to burden, or rare earth (cerium, yttrium, praseodymium or terbium) and zirconium are mixed with at least one of other metal ions (aluminum, barium, magnesium, strontium, titanium, manganese, ferrum, copper and hafnium) to burden. A magnesium bicarbonate or / and calcium bicarbonate aqueous solution prepared from raw materials of magnesium or / and calcium minerals or oxides and hydroxides by at least one working procedure of roasting, digesting, mixing size, carbonizing and the like can serve as a precipitator to carry out precipitation so as to obtain at least one of rare earth and zirconium composite carbonate and subcarbonate, and the at least one of rare earth and zirconium composite carbonate and subcarbonate is further roasted to obtain a zirconium-contained rare-earth composite oxide product. In the preparation method, cheap calcium or / and magnesium minerals or low-purity oxides and hydroxides can serve as initial raw materials to replace common chemical industry precipitators, such as ammonia water, ammonium bicarbonate, sodium carbonate, sodium hydroxide and the like, substances, such as magnesium, calcium, carbon dioxide and the like can be effectively circulated and utilized so as to greatly lower the production cost of the zirconium-contained rare-earth composite oxide, such as ceria-zirconia, yttrium zirconium, praseodymium zirconium, terbium zirconium and the like. In addition, in the production technology disclosed by the invention, no ammonia nitrogen wastewater, high-salinity wastewater and the like are generated, carbon dioxide greenhouse gas emission amount is reduced, the preparation technology is environmentally-friendly, and environment pollution is avoided.

The invention relates to an alkaline zinc-iron flow battery, wherein an ion conduction membrane is prepared from an aromatic polymer containing nitrogen heterocycle, electrodes are carbon felt or carbon paper, a positive electrode electrolytic solution is the mixed aqueous solution of ferrocyanide and strong alkali, a negative electrode electrolytic solution is the mixed aqueous solution of a zincsalt or / and a zinc oxide and strong alkali, the concentrations of the strong alkalis in the positive electrode electrolytic solution and the negative electrode electrolytic solution are 0.001-10 mol / L, and the concentrations of the active substances in the positive electrode electrolytic solution and the negative electrode electrolytic solution are 0.001-3 mol / L. According to the present invention, a class of the alkaline zinc-iron flow batteries with characteristics of high energy density, high power density and long service life are provided, wherein the performance of the batteries is comparable to or superior to the current mature all-vanadium flow batteries, and the batteries have good application prospect.

The invention discloses a synchronous desulphrization and denitration method of flue gas pyrolusite pulp for reclamation. The method mainly comprises the following steps: pyrolusite, water and metal-chelator are prepared into pulp which is taken as an absorbing agent; sulfur dioxide and nitrogen oxides in the flue gas are synchronously absorbed and removed by the absorbing agent; the flue gas is discharged when the purification reaches a standard; the primary product of the mixed mother solution of manganese sulfate and manganese nitrate is obtained after absorbing tail solution is purified; and by utilizing the different solubility of manganese sulfate and manganese nitrate at same temperature, the mixed mother solution is heated firstly to cause the manganese sulfate therein to be crystallized and separated, next, the left mother solution is cooled to cause the manganese nitrate therein to be crystallized and separated, and the left solution is returned to preparation pulp for recycling. No waster water is discharged in the whole process, thereby achieving the purposes of controlling waste by waste, recycling sulfur resources and improving the comprehensive utilization value of pyrolusite. The method is characterized by high desulphrization and denitration efficiency and manganese utilization rate, little secondary pollution, obvious economic benefit and the like.

The invention discloses a preparation method of polysaccharide-base hydrogel. Cellulose and chitosan are used as base bodies; under the effects of a crosslinking agent and an initiator, the polysaccharide-base hydrogel is obtained by using the cellulose and the chitosan as the base bodies through in-situ polymerization and functional monomer copolymerization. In the copolymer, some active functional groups (such as carboxy groups, mesidino, hydroxyl groups and sulfonic groups) are introduced onto the surface of cellulose and chitosan, so that the self swelling performance and the ion exchange capability of the self are enhanced; good adsorption capability is realized on the cation dye in the waste water. In addition, the raw material reserves are rich; the regeneration performance is realized; the biological degradability and the biocompatibility are realized; good application prospects are realized in cation dye waste water treatment.

The invention discloses a nitrogen-doped porous carbon sphere and cobaltous oxide nano-composite anode material based on chitosan and derivatives thereof and a preparation method thereof and belongs to the fields of electrochemistry and new energy resource materials. According to the nitrogen-doped porous carbon sphere and cobaltous oxide nano-composite anode material based on the chitosan and the derivatives thereof and the preparation method thereof, firstly the chitosan and the derivatives thereof are taken as carbon source and nitrogen source precursors, a hard template carbonization method is adopted to prepare nitrogen-doped porous carbon spheres; then a mild hydrothermal method is adopted to load cobaltous oxide nano particles to the nitrogen-doped porous carbon spheres, and then the nitrogen-doped porous carbon sphere and cobaltous oxide nano-composite material is obtained. The material synthesizes the structural features of the nitrogen-doped porous carbon spheres and the small-size effect advantages of the cobaltous oxide nano particles, and due to the expression of the synergistic effect of the nitrogen-doped porous carbon spheres and the cobaltous oxide nano particles, the prepared material shows higher reversible specific capacity, better cycling stability and more excellent large rate discharge performance than a commercial graphite material when used as a lithium ion battery anode material. The method is strong in operability, preparation conditions are mild, the requirement for equipment is not rigorous, and the preparation method is suitable for industrial production; the nitrogen-doped porous carbon sphere and cobaltous oxide nano-composite material prepared by the method has potential application value in electrochemistry fields including lithium ion batteries, supercapacitors and the like.

The invention discloses a method for preparing a manganese sulphate solution by leaching pyrolusite with sulfur dioxide gas. The method mainly comprises: pyrolusite and water are prepared into pyrolusite slurry with a liquid to solid ratio of between 5:1 and 1:1; the slurry, the sulfur dioxide gas and oxygen are continuously passed into a reactor provided with two stages of absorbing and leaching reaction chambers which are arranged and connected serially up and down; and absorbing and leaching reactions are carried out in the two absorbing and leaching reaction chambers sequentially at normal temperature, wherein each stage of absorbing and leaching reaction chamber is provided with a stirrer of no less than 5 kW for each cubic meter, the mass flow of the slurry is determined by the stoichiometric ratio of manganese dioxide required by the mass flow of the sulfur dioxide, and the amount of the added oxygen is determined by the pH values of reaction systems in the absorbing and leaching reaction chambers. Another invention applied by the applicant of the invention discloses a reactor for use in pyrolusite leaching. The reactor realizes stable and continuous production, achieves high sulfur and manganese resources recovery rate, meets tail gas exhaust standards and can effectively suppress the generation of MnS2O6 at the same time.

The invention relates to a method for preparing a polymer composite material by expanded perlite. The method comprises the following steps: mixing the expanded perlite and a polymer in a weight ratio of (2-60) to (98-60) to uniformly disperse the expanded perlite in the polymer matrix; and molding to obtain a polymer composite material product, wherein the expanded perlite is a product formed by carrying out high-temperature expansion on natural mineral perlite, and a honeycomb porous structure is formed inside the expanded perlite; and the polymer is one or more of universal plastic, engineering plastic and rubber. The polymer composite material has excellent heat-insulation and flame-retardant performances, is capable of overcoming the defect that the flame-retardant performance cannot be remarkably improved by existing clay type additives, is environmental-friendly and non-toxic, and does not cause dust pollution; and the packing is low in cost and easily available.

The invention discloses an acidolysis prepared biomass adsorbent which comprises the following steps: firstly, waste biomass is dried, crushed, and screened from 20-mesh to 80-mesh; secondly, the screened waste biomass is put into a reactor, hydrochloric acid solution of 0.5-6.0 mol / L is added, and the weight percentage of the biomass is 1 to 10 percent; thirdly, the acidolysis lasts for 1 to 12 hours at 70-100 DEG C, and the processed product is washed, filtered, dried, crushed and screened from 20-mesh to 100-mesh, thereby preparing the biomass adsorbent; fourthly, the prepared biomass adsorbent is used for removing persistent organic pollutants in waste water or drinking source water, and the processed biomass adsorbent is regenerated and recycled at 200-400 DEG C and under the restrictive oxygen condition. The acidolysis prepared biomass adsorbent belongs to the second reclamation of the agricultural byproduct waste, and has the remarkable advantages that the prepared material comes from the nature, the reserves are rich, no toxic action exists, the preparation flow is simple, the cost is low, the purification efficiency of the adsorption material is obvious, and the recovery and the reuse after the adsorption treatment are easy.

The invention relates to a making method of instant squid food. The making method comprises the steps of pretreatment, soaking, tenderization, stewing, flavoring, baking and package. The making method has the advantages that before squids are made, the squid meat is soaked in tea polyphenol solution, residual formaldehyde can be removed, and meanwhile, the squid meat can be prevented from discoloring through oxidation; before the squid meat stewing, the squid meat is subjected to tenderization treatment so that the original muscular tissue structure of the squid meat is destroyed, the made instant squid food has good mouth feeling, excellent taste and good palatability, and the selection of mass consumers is met; and the storage of the used tea polyphenol and papain is rich, the cost of raw materials is low, the raw materials are easy to obtain, in addition, the extraction process is simple, and the production cost is low.

The invention relates to a gas storage and heat storage integrated hot dry rock reheating compressed air energy storage system. The gas storage and heat storage integrated hot dry rock reheating compressed air energy storage system comprises a plurality of compressors and a plurality of expansion units, wherein the compressors are connected with a motor through couplings; the adjacent compressors are connected with one another through heat accumulators; the last-stage compressor is connected with an inlet of an underground gas storage well group; an outlet of the underground gas storage well group is connected with the first expansion unit; the first expansion unit is connected with a gas flow inlet of a heat exchanger through a heat accumulator; a gas flow outlet of the heat exchanger is connected with the second expansion unit; a working medium inlet and a working medium outlet of the heat exchanger are connected with a hot dry rock heat collecting system through pipes to form a circulation loop; the heat exchanger and the hot dry rock heat collecting system form a reheating system; when the number of the expansion units is greater than 2, reheating systems are separately arranged among the adjacent expansion units behind the first expansion unit. Heat of interstage cooling of the compressors is recycled in a compression stage, air of interstage reheating is preheated in an energy releasing stage, heat loss of the system is reduced effectively, and the efficiency of the system is improved.

The invention discloses a neutral zinc iron double fluid flow battery, a single cell comprises positive and negative electrode end plates, a collector, a positive electrode, a film, a negative electrode, positive and negative electrode liquid storage tanks, a pipeline and a pump, wherein the positive electrode is a porous electrode, the negative electrode is a deposition type electrode, a positive electrode electrolyte solution is a neutral K4Fe (CN) 6 solution, and a negative electrolyte solution is a neutral zinc-ion-containing; when in charging, the electrolyte solutions respectively pass through the positive and negative electrode liquid storage tanks to be respectively sent to the positive electrode and the negative electrode, K3Fe (CN) 6 is produced by oxidation reaction of active material K4Fe (CN) 6 in the positive electrode storage tank, and zinc ions are directly deposited in the form of elemental zinc in the negative electrode; when in discharge, K4Fe (CN) 6 is produced by reduction reaction of active material K3Fe (CN) 6 in the positive electrode electrolyte solution, and the elemental zinc is oxidized into zinc ions to return through the pump back to the negative electrode liquid storage tank. The positive and negative electrode electrolyte solutions are neutral solutions, overcome the corrosion problems caused by a strong acid and a strong alkali as support electrolytes in the traditional liquid flow battery.

The invention relates to a Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and a manufacturing method thereof, belonging to the technical field of manufacturing of metal wear-resisting materials. In the invention, a Cr-free high boron iron-based wear-resisting alloy is taken as a wear-resisting layer of the hammerhead, carbon steel is taken as a tough layer of a hammer handle, and the wear-resisting layer of the dual-liquid dual-metal compound hammerhead comprises the following chemical components in percentage by weight: 0.3-1.0 percent of C, 1.0-4.5 percent of B, 0.3-0.4 percent of Si, 0.2-0.4 percent of Mn, less than 0.05 percent of S, less than 0.05 percent of P and the balance of Fe. In the method, dual-liquid dual pouring gates are adopted for pouring, the wear-resisting layer of the hammerhead is poured firstly, the tough layer of the hammer handle is poured secondly, and the size ratio of the hammerhead to the hammer handle is controlled through an overflow port. The dual-metal compound hammerhead has high integral associativity, long service life, low production cost and simple process.

The invention belongs to the technical field of waste water processing. An inorganic-organic compound-type adsorbent is prepared by compositing three natural materials of natural clinoptilolite, humic acid and chitosan. The method comprises the following specific steps of: performing pre-activation modification on the natural clinoptilolite, performing insolubility processing on humic acid, sufficiently mixing the processed clinoptilolite, insoluble humic acid and acidic chitosan solution according to a certain proportion, heating and drying through microwave, grinding and screening to prepare the inorganic-organic compound-type adsorbent with a loose porous structure, high surface activity and high ion exchanging performance. The prepared adsorbent is used for processing the industrial waste water with the concentration of Cr(VI) lower than 100mg / L, wherein the concentration of effluent Cr(VI) is lower than 0.5mg / L, which meets the requirement of the maximum permissible discharge concentration of the first type of pollutant in the national waste water comprehensive discharge standard. The method has easily obtained materials, simple processing technique and high processing efficiency, and is suitable for large-scale production.

The invention relates to coal base biological soil for replacing topsoil which comprises (by weight percentage) wind-blown coal 30-60%, coal gangue 10-40%, coal ash 10-40%, alta-mud 1-10%, turfy soil 10-30%, water-loss reducer 0.1-1%, soil stabilizer 0.1-1%.

The invention discloses a preparation method of a lignin-based intumescent flame retardant. The preparation method comprises the steps of carrying out esterification reaction on phosphoric anhydride and lignin through optimizing reaction temperature, reaction time, reactant ratio and solvent selecting ratio and other process conditions; then, enabling the reaction product to react with melamine to obtain the lignin-based intumescent flame retardant which is integrated with an acid source, a carbon source and an air source and is high in char formation quantity and good in flame retardance. When the lignin-based intumescent flame retardant is independently applied to a P(3,4)HB biopolyester material or is applied to the P(3,4)HB biopolyester material after being compounded with other flame retardants, the compatibility of the lignin-based intumescent flame retardant and a matrix is good, so that the flame retardance of the material can be remarkably improved, meanwhile, the mechanical property of the material can also be improved, and a P(3,4)HB flame-retardant composite material with excellent comprehensive properties can be prepared. By using the preparation method disclosed by the invention, the yield is high; a reactant is basically nontoxic; the process conditions are easy to control; the operation process is simple; the lignin serving as a main raw material is an abundant regenerative resource, so that the price is low; and therefore, the lignin-based intumescent flame retardant is favorable in application prospect.

The invention discloses a method for preparing barium sulfate and zinc sulphide, which takes barites and zinc containing ore as principal material and includes the following steps: firstly, black ash raw material which contains more than 50% of barium sulphide prepared by the mixed calcinations of barites and coal is leached to get pellucid barium sulphide solution; secondly, the barium sulphide solution reacts with mirabilite to get barium sulfate products after filter pressing separation, drying and grinding; thirdly, zinc oxide obtained by the calcinations of the zinc containing ore reacts with sulphuric acid, and zinc sulfate solution is prepared by the purification of reacting solution; fourthly, depurative zinc sulfate solution reacts with vulcanized alkali containing mother liquor which is prepared after the separation of the barium sulfate from the reacting resultant obtained from step two to get zinc sulphide after filter pressing separation; the sodium sulfate containing mother liquor which is separated from zinc sulphide is put into a boiler for concentration; the steam formed heats the leach barium sulfide water; the concentrated sodium sulfate containing solution reacts with barium sulfide to prepare precipitated barium sulfate.Due to the adoption of closed cycle, the invention has the advantages of simple operation, high yield, energy conservation and environmental protection.

The invention discloses a watering-fertilizing integration water retention agent, a preparation method thereof and an application thereof. The water retention agent is prepared from a water soluble polymerization monomer, bagasse or a bagasse derivative, ground phosphate rock, a free radical polymerization initiator, and a crosslinking agent. The method of the invention, which treats bagasse as araw material, allows an agricultural waste resource to be effectively utilized, and the cheap and abundant ground phosphate rock is added in the method, so the cost of a product (the water retention agent) of the invention is low. In addition, the ground phosphate rock, which is also used as a raw material in the method of the invention, can be reacted with residual acidic monomers and can release water-soluble phosphor which can be absorbed by plants, so the poisoning effect brought by the residual acidic monomers is substantially reduced; and the ground phosphate rock can stably and durablymaintain and release nutrients needed by the growth of crops through a swelling effect under the effect of a sustained and controlled release system of the water-retaining agent, so the water retention agent allows soil to be more suitable for the plants to grow and the biological utilization degree of the nutrients in a fertilizer to be improved.