161 results about "Sodium oxalate" patented technology

The invention discloses a boiler water energy-saving and emission-reducing agent, and relates to the technical field of boiler energy conservation, and the boiler water energy-saving and emission-reducing agent is prepared from the following components: 1, 3-bis ((trihydroxymethyl) methylamino) propane, sodium lignin sulfonate, caffeine, (3, 6-diamino-9-acridinyl) boric acid, a functional copolymer, sodium glycyrrhizinate, hydroxypropyl beta-cyclodextrin and deionized water. The functional copolymer comprises a structural unit introduced by the following monomers: N-acryloyl morpholine, 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate. The agent has remarkable scale and corrosion inhibition effects, is safe and environment-friendly to use, and has good energy-saving and emission-reducing effects.

The invention relates to an automatic monitoring technology, and provides a permanganate index detection method and an on-line monitoring method.The permanganate index detection method comprises the steps that a first reagent is prepared, and a mixed solution containing 98% of sulfuric acid, anhydrous manganese sulfate and pure water is prepared into a mixed solution containing 10-25% of sulfuric acid; the method comprises the following steps: adding a quantitative reagent I into a water sample, and heating and digesting to 90-100 DEG C; dropwise adding a potassium permanganate solution, stirring at the speed of 280-350 revolutions per minute, and then keeping at the temperature of 90-100 DEG C for 10 minutes; dropwise adding a sodium oxalate solution, and uniformly stirring; dropwise adding a potassium permanganate solution again and stirring at the same time, and judging a titration end point according to the absorbance of the solution; and calculating the permanganate index according to the drop number at the titration end point. A certain amount of anhydrous manganese sulfate reagent is added into the sulfuric acid reagent, water bath heating is not needed, and the preparation method is simpler and easier to operate than a national standard method. The real drop number of the titration end point is obtained through the equation, so that the titration drop number is more accurate and is accurate to four decimal points.

The invention relates to the technical field of wave-absorbing materials, in particular to a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material. The invention provides a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material, which comprises the following steps of: etching titanium aluminum carbide powder through a LiF / HCl mixture, and performing ultrasonic stripping to prepare a uniform dispersion of MXene nanosheets; the preparation method comprises the following steps: dispersing MXene nanosheets in a solution of water and absolute ethyl alcohol, and adding a pyrrole monomer and a FeCl3. 6H2O aqueous solution for reaction; after the reaction, washing is performed to obtain a PPy-MXene composite material; the preparation method comprises the following steps: by taking NiCl2. 6H2O as a nickel source and sodium oxalate as a precipitator, preparing NiO nanowires by adopting a hydrothermal method combined with a calcining process; the invention discloses a preparation method of an MXene-NiO-PPy ternary composite wave-absorbing material.According to the method, the MXene-NiO-PPy ternary composite wave-absorbing material with rich heterogeneous interfaces and a porous micro-nano structure is constructed, cooperation of dielectric loss, magnetic loss and interface polarization loss is achieved, and finally the light, efficient and broadband wave-absorbing performance is obtained.

The invention discloses a comprehensive utilization method of high-salinity wastewater produced by hydrometallurgical treatment of bastnaesite, which comprises the following steps: A, mixing alkaline wastewater and acidic wastewater, neutralizing and clarifying to obtain calcium fluoride and sodium chloride wastewater; b, mixing the sodium chloride wastewater with the precipitation wastewater, adding lime water in an aeration manner to adjust the pH value, hydrolyzing heavy metal ions in the wastewater, and performing solid-liquid separation to obtain filter residues and filtrate which is sodium chloride high-salinity wastewater; and C, adding oxalic acid into the sodium chloride high-salinity wastewater, stirring, standing, carrying out solid-liquid separation, pressurizing, concentrating, recovering hydrochloric acid, and crystallizing to obtain a crystal substance, namely a sodium chloride product. According to the method, fluorine in the wastewater is removed firstly, then the wastewater is recovered into wastewater containing sodium chloride, oxalate is dissolved into the high-salinity wastewater to separate out sodium oxalate and recover hydrochloric acid, so that the content of sodium chloride in the system is greatly reduced, and the recovery efficiency of sodium ions in the wastewater is improved.

The invention belongs to the technical field of animal models, and provides a construction method and application of a kidney stone induced acute kidney injury mouse model. The construction method of the kidney stone induced acute kidney injury mouse model comprises the following steps: firstly, fasting and depriving water of a mouse for 12 hours, then injecting 10mg / kg sodium oxalate solution into the body of the mouse in an intraperitoneal injection manner, and meanwhile, replacing drinking water with 3wt% sodium oxalate solution, so that the kidney stone induced acute kidney injury mouse model can be obtained 24 hours later. The sodium oxalate solution is used as the lithigenic agent, the effect is obvious and reliable, the action is strong, the stability and the repeatability are high, the obtained acute kidney injury mouse model is used for subsequent AKI pathogenesis and AKI generation experiment research or drug screening, the observation is obvious, and the method is simple.

The present application relates to a sodium-ion battery precursor, a positive electrode material, a preparation method, and a use. A complexing agent solution used for preparing the sodium-ion battery precursor comprises a first complexing agent and a second complexing agent, wherein the first complexing agent comprises any one of or a combination of at least two of oxalic acid, sodium oxalate, or potassium oxalate, and the second complexing agent comprises any one of or a combination of at least two of citric acid, sodium citrate, or potassium citrate. In the present application, by providing the specific complexing agents, the prepared sodium-ion battery precursor has a relatively high specific surface area, thereby facilitating the intercalation of sodium ions when sintering and preparing a positive electrode material, so that the electrochemical performance of the sodium-ion battery positive electrode material can be significantly improved.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a battery capable of supplementing lithium or sodium in situ, which comprises a positive plate, a negative plate and an electrolyte, and is characterized in that the electrolyte contains a component A, and a positive electrode and / or a negative electrode contains a component B; the structural general formula of the component A is X-Y, and X is lithium fluorosulfonate, sodium fluorosulfonate, lithium difluorophosphate or sodium difluorophosphate; y is boron trifluoride or phosphorus pentafluoride; the component B is at least one of lithium oxalate, sodium oxalate, lithium fluoride and sodium fluoride. Compared with the prior art, the component A and the component B are simultaneously added into the battery disclosed by the invention, so that the battery shows more excellent cycle performance and high-temperature performance. The combination mode has better performance compared with the mode that the component B is independently used in the electrode material or the component A is independently used in the electrolyte.

The invention discloses a water-based compensation sodium source sodium ion battery positive pole piece and a preparation method thereof. Mixing a positive active material, a conductive agent, a water-based binder, a water-soluble sodium supplement agent and a solvent to obtain positive slurry; wherein the water-soluble sodium supplement comprises sodium nitrite, sodium oxalate and sodium citrate; the solvent is water; and coating the surface of a current collector with the positive electrode slurry to prepare the positive electrode plate. Deionized water is used for replacing a traditional organic solvent to serve as a pulping solvent, and dual-function optimization is achieved by adding a specific water-soluble sodium supplementing agent. The sodium supplementing agent is uniformly distributed in the pole piece through a dissolution-recrystallization mechanism, and an efficient sodium ion pre-compensation system is formed. According to the method, the production cost and the energy consumption are remarkably reduced, the structural degradation of the positive active material in a water system environment can be effectively inhibited, irreversible sodium loss caused by formation of a first-week solid electrolyte interface (SEI) of a negative electrode is counteracted through a sodium source compensation mechanism, and the method has remarkable environmental friendliness and industrial application value.

The invention discloses a sodium-philic current collector and a negative-electrode-free sodium ion battery comprising the same. According to the sodium-philic current collector, carbon-coated aluminum foil is subjected to nitrogen plasma treatment, nitrogen doping sites are formed on a carbon-coated layer, the affinity to sodium can be enhanced, and uniform deposition of sodium is promoted; according to the electrolyte, a cosolvent of diethylene glycol dimethyl ether and tetraethylene glycol dimethyl ether is adopted, sodium hexafluorophosphate, sodium tetrafluoroborate and sodium trifluoromethanesulfonate are compounded, (3-fluorophenyl)-oxoacetonitrile and allyl methyl carbonate are added to serve as electrolyte additives, a weak solvation structure is formed, a solid electrolyte interfacial film rich in boron and fluorine is constructed, and side reactions are inhibited; sodium oxalate is added to the positive electrode as a sodium supplementing agent to make up the loss of active sodium caused by low first charge-discharge efficiency. The invention solves the problems of low first charge-discharge efficiency and poor dendritic crystal growth and cycle stability of the non-anode sodium ion battery, has high energy density and process simplicity, and is suitable for large-scale production.

An integrated energy system comprising a power plant configured to generate steam. The power plant can include a nuclear reactor and / or an electrical power generation system. A chemical products generation system can include a first reaction chamber receiving Sodium Formate (HCOONa) that, via insertion of a first portion of the steam at a first temperature, is decomposed into Sodium Oxalate ((COO)2Na2) and Hydrogen (H2), the steam including super-heated steam. The chemical products generation system can include a second reaction chamber receiving the Sodium Oxalate ((COO)2Na2) that, via insertion of a second portion of the steam at a second temperature, is decomposed into Sodium Oxide (Na2O), Carbon Monoxide (CO), and Carbon Dioxide (CO2). A syngas generation system can be operably coupled to the chemical products generation system and configured to generate a combination of the Hydrogen (H2), the Carbon Monoxide (CO), and / or the Carbon Dioxide (CO2), and / or to generate syngas.

The invention discloses a lithium iron phosphate positive plate recovery method suitable for a decommissioned lithium ion power battery, which comprises the following steps: S1, safely disassembling the decommissioned lithium iron phosphate power battery to obtain a positive plate; s2, soaking the positive plate in an eluent at a constant temperature of 65-95 DEG C, taking out the current collector after an active substance is separated from the current collector, and filtering to obtain the active substance; s3, cleaning and drying the active substance and the current collector obtained in the step S2; the eluent is formed by dissolving an acidic chelating agent and a passivating agent in water, the acidic chelating agent comprises one or more of gluconic acid, nitrilotriacetic acid, ethylenediamine tetraacetic acid and pentetic acid, and the passivating agent is used as an additive and comprises one or more of sodium phytate, sodium acetate, sodium citrate, sodium oxalate and sodium phosphate. According to the invention, the retired lithium iron phosphate battery is recovered at low cost by using a low-energy-consumption, safer, green and environment-friendly efficient method, and a high-purity and more complete positive active material and current collector are obtained.

An integrated energy system including a power plant is discussed herein. In some examples, the integrated energy system may include at least one nuclear reactor and electrical power generation system configured to generate steam and electricity, a water treatment plant configured to produce Sodium Hydroxide (NaOH) from salt water, a Sodium Formate (HCOONa) production plant configured to receive the Sodium Hydroxide (NaOH) to produce Sodium Formate (HCOONa), a Thermal Decomposition reactor configured to receive the Sodium Formate (HCOONa) and configured to receive at least a first portion of the steam or at least a second portion of the electricity from the power plant to indirectly heat the Thermal Decomposition reactor to produce Hydrogen (H2), Carbon Dioxide (CO2), and Carbon Monoxide (CO) from the Sodium Formate (HCOONa), and a Methanol (CH3OH) reaction chamber configured to receive the Hydrogen (H2), the Carbon Dioxide (CO2), and the Carbon Monoxide (CO) to produce Methanol (CH3OH).

The invention discloses a method for preparing tertiary amines using secondary amines as raw materials. The method comprises the steps of reacting secondary amines as raw materials with acids to generate proton-type ionic liquids, and reacting proton-type ionic liquids and aldehydes under the action of a reducing agent to generate tertiary amines. The secondary amines are fatty secondary amines and / or aromatic secondary amines and / or cyclic secondary amines, the acid is selected from a combination of one or more of organic carboxylic acids and inorganic acids, the aldehyde is a monoaldehyde, a dialdehyde or a polymer of aldehydes, and the reducing agent is selected from a combination of one or more of formic acid, sodium formate, oxalic acid, sodium oxalate and triphenylsilane. The proton-type ionic liquid in the present invention can play a role in self-catalytic reaction, so that while ensuring high yield and high purity of tertiary amine products, mild reaction conditions are achieved, high pressure and hydrogen reduction atmosphere are not required, and safe and green reducing agents can be used.

The invention discloses a low-temperature denitration MgMn2O4 spinel catalyst as well as a preparation method and application thereof. The catalyst has the shape of a hollow quadrangular prism, and is prepared by dispersing magnesium salt and manganese salt by using hexadecyl trimethyl ammonium bromide as a dispersing agent, then mixing with oxalic acid or sodium oxalate, carrying out hydrothermal reaction at 140-160 DEG C, carrying out vacuum drying on a reaction product, and calcining in an oxidizing atmosphere. When the catalyst is used for low-temperature denitration, the low-temperature catalytic effect is remarkable, and the catalyst is free of biological toxicity, low in cost, simple in preparation method and wide in application prospect.

A bionic rock-invading agent for silicate rock crushing and an auxiliary rock-breaking method thereof are provided, wherein an oxalic acid-sodium oxalate buffer solution OA is prepared, which comprises, by weight percentage, 0.6% to 1.1% of oxalic acid and 1.2% to 5.5% of sodium oxalate; a bionic neutral rock-invading agent ON is prepared, and the following four components, by weight percentage, are added to OA in a certain weight ratio: 0.05% to 0.3% of polyacrylamide, 1.0% to 3.1% of triethanolamine, and 0.3% to 5.5% of citric acid. 1.5%, trisodium nitrilotriacetic acid 2.0% to 5.0%, wherein the purity of polyacrylamide is ≥ 99.5%; the purity of triethanolamine is ≥ 99.5%; the purity of citric acid is ≥ 99.5%; the purity of trisodium nitrilotriacetic acid is ≥ 99.5%; during TBM excavation or oil drilling, the configured bionic rock-invading reagent is sprayed from the TBM cutter head to the face or pumped into the hollow of the drill string; thereby degrading the mechanical properties of the rock and achieving mechanical-chemical coupling rock breaking. The bionic rock-invading reagent of the present invention is neutral, has no obvious corrosiveness to mechanical rock-breaking tools, is environmentally friendly and efficient, and is particularly suitable for chemically assisted rock breaking of hard rocks such as silicate rocks.

The invention provides a method for stepwise and efficiently purifying a key impurity sodium oxalate in a sodium aluminate solution by utilizing ultrasonic waves, and particularly relates to the technical field of aluminum oxide production. The method provided by the invention comprises the following steps: adding alkali containing Na into a sodium aluminate solution to adjust the concentration of Na2O in the sodium aluminate solution to be 180-260g / L, after the sodium aluminate solution is cooled, adding a seed crystal, controlling the concentration of the seed crystal to be 5-40g / L, and carrying out ultrasonic gradient purification; the step-by-step ultrasonic purification comprises the step of sequentially performing strong ultrasonic assisted crystallization and weak ultrasonic assisted crystallization; the power of the strong ultrasound is 0.1-0.6 W / L of the sodium aluminate solution; the power of the weak ultrasound is 0.01-0.05 W / L of the sodium aluminate solution; the time of the ultrasonic step purification is 10 minutes to 15 hours. The method provided by the invention has the advantages of low caustic alkali loss rate, high sodium oxalate purification rate, reduction of the purification cost, high purification efficiency, simple method and easy realization of industrialization, and the obtained filter residue can be recycled as a seed crystal.

The invention discloses a method for recovering rare earth in neodymium iron boron waste based on a ternary eutectic solvent, 13 HDESs composed of trioctylphosphine oxide (TOPO) as HBA and an alcohol compound as HBD are totally prepared and characterized, through optimization, batch counter-current extraction experiments are carried out by taking actual leachate as mother liquor under the optimal condition, and the recovery rate of rare earth in neodymium iron boron waste is greatly improved. HDES is used for three-stage counter-current extraction, the total rare earth concentration in mother liquor is reduced from 4389.3 mg / L to 33.5 mg / L, complete recovery of rare earth is achieved, a loaded organic phase can be stripped through 0.2 mol / L sodium oxalate, HDES after reverse extraction can enter circulation after being washed with deionized water, and the HDES still keeps good stability after five times of circulation. And roasting the back-extracted rare earth to finally form a rare earth oxide product. The process is green and clean, does not need to use toxic volatile solvents, and has a wide application prospect.

The invention belongs to the technical field of soil improvement, and relates to a carbon-based soil conditioner and a preparation method thereof. According to the carbon-based soil conditioner provided by the invention, corncob biomass charcoal is prepared by performing micro-fermentation treatment on corncob powder by adopting ammonium bicarbonate before anaerobic cracking, then performing anaerobic cracking, and finally performing treatment by adopting sodium oxalate and microwave heating, so that the adsorption performance of the obtained corncob biomass charcoal can be greatly improved; therefore, the performance of the soil conditioner prepared from the corncob biomass charcoal is improved, and the soil conditioner is more favorable for improving the water and fertilizer retention capacity of soil, improving the air permeability and water permeability of the soil, adjusting the pH value of the soil and reducing the toxicity of heavy metals and organic pollutants in the soil.

The invention provides a high-crystallinity g-C3N4 nanosheet photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of nanometer photocatalytic materials. The preparation method comprises the following steps: dissolving a precursor dicyandiamide forming g-C3N4 in water under heating in a water bath, then adding sodium oxalate into the solution, carrying out vacuum freeze drying on the obtained mixed solution, and then calcining the obtained powder at a high temperature to obtain the high-crystallization g-C3N4 nanosheet. The g-C3N4 nanosheet not only has a high-crystallinity crystal lattice and an ultrathin nanosheet structure, but also shows excellent photocatalytic performance. Under visible light, the hydrogen production capacity of the high-crystallinity g-C3N4 nanosheet photocatalytic material is improved by 177.8% compared with that of bulk phase g-C3N4.

The invention relates to a preparation method of large-granularity cobaltosic oxide for a battery, and belongs to the technical field of battery preparation. The preparation method comprises the following steps: dissolving cobalt salt in deionized water to obtain a high-concentration cobalt ion solution, mixing sodium oxalate and niobium ammonium oxalate for use to form a specific precursor structure, carrying out a co-precipitation reaction on cobalt ions, oxalate and niobium ammonium oxalate in an aqueous solution to generate a cobalt-containing oxalate and niobate compound precipitate, and carrying out solid-liquid separation on the cobalt-containing oxalate and niobate compound precipitate. Then hydrogen peroxide is used for promoting oxidation of cobalt ions, and formation and crystallization of cobalt oxalate precipitates are further promoted; in the preparation process, water is effectively removed through freeze drying, meanwhile, the morphology and structure of precipitates are kept, organic matter and volatile impurities are removed in the roasting and re-roasting process, and formation and stability of a cobaltosic oxide crystal structure are promoted; the stable crystal structure is favorable for prolonging the cycle life and improving the safety of the battery.

The invention belongs to the technical field of catalyst preparation, and particularly relates to an ozone catalyst for water treatment and a preparation method thereof, and the preparation method comprises the following steps: uniformly mixing iron-manganese modified zeolite subjected to hot water treatment, TEOS hydrolysate, VTMS hydrolysate, a VSNa solution, divinyl benzene, an initiator, sodium chloride and CMC to obtain slurry, treating the slurry into wet particles, and drying the wet particles to obtain the ozone catalyst for water treatment. Carrying out heating curing treatment on the wet particles to obtain a catalyst precursor, washing the catalyst precursor with deionized water, and then carrying out heat treatment and cooling to obtain the catalyst. The method can effectively reduce the effluent COD of the petrochemical wastewater containing sodium oxalate, and is high in long-term use stability.

The present invention provides a process method and application for decalcification in lithium liquid. The process method for decalcification in lithium liquid comprises the following steps: S1, adding sodium oxalate to the lithium liquid, and adding sodium hydroxide to adjust the pH value of the solution to 6-7, reacting at a stirring rate of 200-400 r / min at room temperature for 1-2 hours, and filtering to obtain solution one; S2, passing solution one through a macroporous resin column at a flow rate of 10-15 BV / h to obtain solution two; S3, filtering solution two with a modified ceramic membrane to obtain solution three; S4, precipitating lithium in solution three and purifying it to obtain a lithium phosphate product. The process method for decalcification in lithium liquid of the present invention can remove most of the calcium ions in the lithium liquid, and can also remove most of the magnesium ions, and can reduce the lithium loss rate, and improve the purity of the lithium phosphate product finally obtained.

The present invention discloses a method for the simultaneous detoxification of organotin waste and the preparation of sodium stannate. The method comprises mixing the organotin waste with a composite additive comprising sodium oxalate and hydrogen peroxide as active ingredients, followed by spray combustion. The combustion exhaust is subjected to dust removal to recover a tin-rich material, which is then water-leached to obtain a sodium stannate solution. By adding sodium oxalate and hydrogen peroxide during the combustion and decomposition of the organotin waste, the method not only enhances the thermal conversion process of the organotin compound, converting its toxic organic functional groups into harmless CO2 and H2O emissions, but also promotes dioxin decomposition, sulfur fixation, and suppresses NOx generation. Furthermore, the method efficiently converts tin into sodium stannate, which is easily recovered by water leaching. The method is simple to operate, highly efficient, and environmentally friendly.

The present invention discloses a Prussian blue-based sodium-ion battery positive electrode material, a preparation method, and applications thereof. The method comprises: mixing sodium ferrocyanide, oxalate, and a non-aqueous solvent, subjecting the mixture to a ball-milling reaction, and washing the product after the ball-milling reaction to remove unreacted raw materials and a portion of sodium oxalate generated by the reaction, thereby obtaining the Prussian blue-based sodium-ion battery positive electrode material. The present invention can synthesize Prussian blue-based compounds with low defects and low interstitial water molecule content, thereby improving the sodium storage performance and capacity utilization of such materials; it also reduces the probability of side reactions in the electrolyte causing cell bloating. In addition, the use of oxalate-based raw materials can also generate a sodium oxalate-based positive electrode sodium supplement during the synthesis of the Prussian blue-based compound, thereby replenishing sodium ion loss caused by SEI film formation or other side reactions during the initial charge.

The invention relates to a sodium-ion battery and application thereof.The sodium-ion battery comprises a positive plate, a diaphragm, a negative plate, electrolyte and a current interruption device, and the sodium-ion battery meets the following two conditions that (1) a positive active material layer of the positive plate contains gas production particles and auxiliaries, the gas production particles are selected from sodium carbonate and / or sodium oxalate, the auxiliary agent is selected from ferric chloride and / or aluminum chloride, and the mass fraction of the gas production particles in the positive electrode active material is greater than that of the auxiliary agent in the positive electrode active material layer; the sum of the mass fractions of the gas generation particles and the auxiliary agent in the positive electrode active material layer is within 4%; and (2) the trigger threshold value of the current interruption device is 0.55 MPa to 0.85 MPa. According to the sodium ion battery disclosed by the invention, the potential safety hazard of the traditional sodium ion battery under the working conditions of overcharge and thermal abuse can be solved by optimizing the synergistic effect of the internal gas production mechanism of the battery cell and the CID trigger threshold value.

The application discloses a kind of copper electrolyte arsenic bismuth selective extraction and copper-nickel separation cascade process, after the trivalent arsenic is converted into pentavalent arsenic by pre-oxidation of feed liquid, two-stage countercurrent extraction is carried out using straight-chain trialkyl phosphine oxide organic phase containing secondary octanol modification, and efficient co-extraction of arsenic bismuth is realized;Loaded organic phase is washed by pure water two-stage countercurrent, and copper-nickel co-extracted is preferentially eluted and returned to the electrolysis system, and arsenic bismuth is retained in the organic phase;Then, arsenic bismuth is stripped out and enriched by four-stage countercurrent stripping with sodium oxalate solution, and the blank organic phase is washed and regenerated for recycling use.The application is stable below 3g / L after cascade operation of raffinate arsenic, and the bismuth extraction rate can reach 100%, the organic phase is stable in circulation, no impurity accumulation, low operation cost, suitable for industrial continuous production, significantly guaranteeing the quality of copper and operation safety.

The invention provides a method for synergistically removing organic matters in an aluminum oxide production process, and belongs to the field of aluminum oxide production. The method comprises the following steps: adding a macromolecular organic matter oxidant into a sodium aluminate solution, and carrying out a stirring reaction to degrade macromolecular organic matters in the sodium aluminate solution into medium and small molecular organic matters, so as to obtain a first mixed solution; carrying out solid-liquid separation on the first mixed solution to obtain a first filtrate; adding a sodium oxalate adsorbent into the first filtrate, and carrying out stirring reaction, so that sodium oxalate in the first filtrate is subjected to controlled crystallization on the surface of the sodium oxalate adsorbent to obtain a second mixed solution; carrying out solid-liquid separation on the second mixed solution to obtain a second filtrate; and returning the second filtrate to the aluminum oxide production process. Through a step-by-step targeted treatment design, the limitation of single type of removed organic matters in the existing organic matter removal technology is effectively overcome, and meanwhile, by virtue of an adsorbent mediated crystallization mechanism, the problem that the sodium oxalate crystal morphology is difficult to effectively control is solved.

A process for producing a nitrogen-doped peony-shaped molybdenum oxide, comprising the following steps: (1) adding a regulator to a molybdenum-containing solution for reacting, concentrating and thermally treating to obtain a peony-shaped molybdenum oxide; and (2) dissolving the peony-shaped molybdenum oxide in a conditioning agent and adding an amine source for standing, centrifuging, washing, and heat-treating, thereby obtaining the nitrogen-doped peony-shaped molybdenum oxide; wherein the regulator is at least one of the following: nitric acid, ammonium nitrate, sodium persulfate, ammonium persulfate, concentrated sulfuric acid, H2O2, ozone, sodium hypochlorite, wherein in step (2), the conditioning agent is at least one of the following: sodium acetate, ammonium acetate, sodium formate, diaminoethane, sodium oxalate, ammonium benzoate, sodium phenylacetate, sodium propionate, sodium tartrate, sodium citrate, ammonium citrate; and wherein in step (2) the amine source is at least one of the following: aniline, dimethylamine, trimethylamine, benzylamine, phenethylamine, ethylamine, diethylamine, propylamine, phenylenediamine, xylylenediamine, amphetamine.

An integrated energy system comprising a power plant configured to generate steam. The power plant may comprise a nuclear reactor and / or an electricity generation system. A chemical product generation system may comprise a first reaction chamber that receives sodium formate (HCOONa), which decomposes into sodium oxalate ((COO)2Na2) and hydrogen (H2), via the insertion of a first portion of steam at a first temperature, wherein the steam may comprise a first reaction chamber containing superheated steam. A chemical product generation system may comprise a second reaction chamber that receives sodium oxalate ((COO)2Na2), which decomposes into sodium oxide (Na2O), carbon monoxide (CO), and carbon dioxide (CO2), via the insertion of a second portion of steam at a second temperature. A syngas generation system may be operably connected to the chemical product generation system and configured to generate a combination of hydrogen (H2), carbon monoxide (CO), and / or carbon dioxide (CO2), and / or syngas.

The application discloses a kind of corrosion methods for revealing alloy sample metallographic structure, comprising: step S1, preparation electrolytic etchant: using oxalic acid, sodium bicarbonate and concentrated nitric acid preparation final concentration is 0.25-0.5mol / L sodium oxalate and 0.15-0.3mol / L nitric acid mixed aqueous solution;Step S2, electrolytic etching of corrosion piece: electrolytic etchant is poured into electrolytic etching instrument, and the alloy sample to be corroded is placed in electrolytic etching liquid and electrolytic etching is carried out.The electrolytic etchant of the application uses oxalic acid, sodium bicarbonate and concentrated nitric acid as reactant, and is prepared by chemical ion reaction.After the preparation of etchant is finished, a small amount of carbonate ions and hydrogen ions are still stored in the etchant, so that a small amount of carbonate ions and hydrogen ions will continue to react when the alloy sample is electrolyzed, and micro-bubbles are attached to the alloy sample, so that the metallographic photo taken has stereoscopic imaging effect, and the grain boundary is clear and identifiable.