175 results about "Carbonate sodium" patented technology

A more efficient and lower waste liquid-phase method for recovering lithium carbonate suitable for high-performance lithium applications from recycled lithium-ion battery and other sources of lithium hydroxide including aqueous solutions is described. The method uses carbon dioxide gas to directly form lithium carbonate from a lithium hydroxide including solution, thus eliminating the need for conventional acid pre-treatment and reducing the need for subsequent sodium carbonate addition.

This utility model discloses an ozone advanced oxidation tail gas recovery and utilization device, including an ozone tail gas inlet pipe and a primary purification tower and a secondary purification tower connected in sequence. The rear end of the secondary purification tower is connected to an ozone buffer tank. The primary and secondary purification towers are connected to the ozone tail gas inlet pipe through an ozone circulation pipe. Both the primary and secondary purification towers are connected to sodium hydroxide dosing tanks. This application uses a secondary ozone purification tower to purify the tail gas after ozone catalytic oxidation, recover and utilize the remaining ozone, improve ozone utilization rate, and reduce costs. At the same time, it absorbs the carbon dioxide after catalytic oxidation to produce a high-purity sodium carbonate solution for downstream use as a raw material, achieving waste resource recycling.

This invention provides a method and equipment for preparing compound fertilizer using lepidolite slag as raw material. The method includes the following steps: S1, pretreatment: lepidolite slag is taken, crushed, and screened to obtain lepidolite slag particles with a particle size of 40 to 400 mesh; S2, activation: lepidolite slag is thoroughly mixed with an activator and a flux, and then ground to obtain powder with a particle size less than 80 mesh, wherein the activator is sodium hydroxide and anhydrous sodium carbonate, and the flux is calcium oxide; S3, sintering: the activated and ground powder is sintered at a temperature of 650℃-1000℃ for 0.5 h-5 h; S4, compounding: trace elements are added to the sintered fertilizer, mixed evenly, and ground into powder. The method for preparing compound fertilizer using lepidolite slag as raw material provided by this invention can effectively utilize lepidolite slag to prepare compound fertilizer, solving the environmental problem of large-scale accumulation of lepidolite slag and realizing the resource utilization of waste.

This invention belongs to the field of glass technology and relates to a high-temperature resistant structural glass material, its preparation method, and its applications. The glass is composed of the following components by mass percentage: 60%-70% silicon dioxide, 5.5%-11% boric acid, 0.1%-5% aluminum hydroxide, 0%-3% potassium nitrate, 5.5%-13% potassium carbonate, 0%-12% sodium carbonate, 0.1%-4% calcium carbonate, 0%-2% calcium fluoride, 0%-1% lithium carbonate, 0%-2% basic magnesium carbonate, 0.1%-1% titanium dioxide, 0%-2% zirconium dioxide, and 0%-1% cerium dioxide; the total mass percentage of potassium nitrate, potassium carbonate, sodium carbonate, and lithium carbonate does not exceed 22%. This structural glass possesses a high softening temperature, a suitable coefficient of thermal expansion, high-temperature resistance, thermal shock resistance, and processing performance, making it suitable as a structural material for optoelectronic devices.

This invention discloses a Na 3.12 Fe 2.44 This invention relates to the field of sodium-ion secondary battery electrode technology, specifically the (P2O7)2 / C cathode composite material, its preparation method, and its application. The preparation method employs a sol-gel method, using sodium acetate, sodium carbonate, or sodium dihydrogen phosphate as the sodium source. A precursor solution is prepared through a reverse feeding process, followed by drying, pre-calcination, cold isostatic pressing pretreatment, and segmented calcination to obtain an ellipsoidal crystalline composite material with an aspect ratio of 1.5-2.0 and a compressive strength ≥180 MPa. Electrodes made from this composite material exhibit 97.3% structural integrity under 100T roller pressing, 91.5% capacity retention after 500 cycles at 2C rate, and a thermal runaway temperature of 182℃. This invention solves the problem of insufficient mechanical properties of high-pressure solid electrodes from the source through crystal structure control. The process is controllable and highly repeatable, and the prepared sodium-ion battery combines high energy density, long cycle life, and high safety.

Provided is a synthesis method for azoxystrobin, comprising: in a water-oil system of an organic solvent and an aqueous solution of trimethylamine, a compound represented by formula I reacts with 2-cyanophenol to obtain azoxystrobin, wherein the molar ratio of the compound represented by formula I to trimethylamine is 1:(0.96-2). The synthesis method has high reaction efficiency, does not produce CO2, avoids the risks of entrainment and overflow, reduces the generation of side reactions and solid waste emissions and is environmentally friendly. In addition, the method does not require the use of solid sodium carbonate or potassium carbonate, and the material reaction system is an oil-water reaction system, so that the reaction efficiency is greatly improved, and the yield can also be maintained at 95% or more, thereby taking both the efficiency (timeliness) and the yield into account and easily achieving continuous reaction, and thus providing technical support for intelligent and unmanned production. Moreover, since trimethylamine can be recycled, the use of one raw material is reduced, and further there is no need for complicated treatment for mixed salts and waste water thereof, thereby significantly reducing the energy consumption.

The present application belongs to the technical field of cleaning supplies, and particularly relates to a high-efficiency blood-stain removing powder and a preparation method thereof. The high-efficiency blood-stain removing powder provided by the present application comprises the following raw materials and mass fractions: 45.0-65.0 parts of sodium percarbonate, 12.0-18.0 parts of an auxiliary agent, 11.0-18.0 parts of an auxiliary cleaning agent, 4.0-7.0 parts of anhydrous sodium metasilicate, 1.0-3.0 parts of a non-ionic surfactant, 1.5-2.5 parts of an enzyme preparation, 0.2-1.0 parts of an antibacterial agent, 1.0-3.0 parts of a thickening agent, and 0.1-0.5 parts of a fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium alpha-alkenyl sulfonate at a mass ratio of 8.0-12.0:3.0-6.0. When the high-efficiency blood-stain removing powder of the present application is used, no complex operation is needed, and blood stains can be easily removed through simple soaking, without laborious scrubbing, so that the effect of 'quick cleaning and complete stain removal' is truly achieved.

The present invention concerns an industrial chemical process (400f) and an apparatus for carrying out that process. The chemical process integrates into a single, combined method: (i) a method (303, 304) of producing iron and / or manganese from their ores, and (ii) a method (205a, 205b, 207, 208, 209) of producing an oxide or hydroxide of at least one of calcium, magnesium and iron from another ore respectively comprising a carbonate mineral of at least one of calcium, magnesium and iron. This combined method has the iron and / or manganese ore and the other ore comprising the carbonate mineral as its only essential ingredients, with common salt and / or water as optional extra ingredients. The combined method produces iron and / or manganese in elemental form, an oxide or hydroxide derived from the carbonate mineral, and oxygen as its corresponding products. If the iron and / or manganese ore also comprises a siliceous mineral, the method may also produce an alkaline mixture comprising sodium silicate as a co-product. Salt and water act as intermediaries to produce these end-products, but are only consumed if supplied in excess. An amount of sodium oxide, hydroxide and / or carbonate determined by the amount of salt consumed may be produced as a co-product, along with a corresponding amount of at least one of chlorine and hydrochloric acid. An amount of hydrogen determined by the amount of water consumed may also be produced as a co-product, along with an increased amount of oxygen. The iron, manganese and oxygen produced may all be used in steelmaking. Any excess oxygen may be safely vented to atmosphere. The oxide or hydroxide derived from the carbonate mineral may be used in cement manufacture, as a flux in steelmaking and / or as an ingredient in the manufacture of soda-lime glass. The alkaline mixture comprising sodium silicate may be used as an alkaline activator for an alkaline activated or geopolymer cement. The sodium carbonate may be used in the manufacture of soda-lime and / or borosilicate glass, for example. The chlorine and / or hydrochloric acid may be used in the manufacture of chlorinated organic compounds, for example. The hydrogen may be used as a fuel in a hydrogen economy. The method of the invention requires no nett input of heat because the chemical reactions it involves are exothermic overall. It also consumes no fossil fuels and has electricity as its only energy requirement. Thus if the electricity is produced from a source of renewable energy, this method produces no greenhouse gas emissions. In some embodiments, the method can even have a negative carbon footprint overall. The invention is intended to replace existing techniques for producing iron and / or manganese from their ores, including hydrogen-DRI, the calcination of limestone and other carbonate minerals, both in cement manufacture and in the production of lime for other purposes, and the ammonia-soda, or Solvay, process for the production of sodium carbonate. The invention therefore has the potential to eliminate up to about 20% of anthropogenic carbon dioxide emissions. [Fig. 9B]

This invention belongs to the field of solid waste resource recycling technology in the metallurgical industry. It discloses a process for preparing iron oxide red and extracting titanium dioxide from high-iron red mud. The process involves mixing high-iron red mud with an alkaline agent, followed by water leaching to obtain a water-leached solution and a water-leached residue. The water-leached solution undergoes desilication and carbon removal treatment to obtain aluminum hydroxide and sodium carbonate solutions. The water-leached residue is then acid-leached with sulfuric acid; silicon is recovered as silica gel, while aluminum and iron enter the solution and undergo polymerization to prepare a water purification agent. The acid-leached residue is treated with a high-temperature heap leaching-water leaching process using concentrated sulfuric acid to achieve efficient dissolution and separation of titanium. The titanium-iron mixed solution is subjected to stepwise crystallization control, successively precipitating ferric sulfate and ferrous sulfate crystals, which are then pyrolyzed to generate high-purity iron oxide red. Finally, the mother liquor is subjected to titanium precipitation and pyrolysis to obtain titanium dioxide. This invention achieves efficient separation and high-value utilization of all components of iron, titanium, aluminum, and silicon in red mud. The process flow is rationally cyclical, resulting in high-value-added products with low energy consumption and no secondary pollution.

A method for treating a blowdown stream from a sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer, said blowdown stream comprising sodium carbonate and / or sodium bicarbonate and at least 1 wt% sodium chloride and / or sodium sulfate, the method comprising: - causticizing at least 50 mol% of the sodium from the sodium carbonate and / or sodium bicarbonate in a caustic solution and in a calcium carbonate sludge with lime and water, - separating the calcium carbonate sludge from the caustic solution; - concentrating the caustic solution by removing some of the water to obtain a concentrated caustic solution containing at least 25% NaOH and a crystallized solid containing sodium carbonate and sodium chloride and / or sulfate; - separating the crystallized solid from the concentrated caustic solution, said crystallized solid to be disposed of or subsequently recovered;- Recycle part of the concentrated caustic solution to the sodium carbonate, sesquicarbonate, wegsheiderite or bicarbonate crystallizer.;

This invention discloses a comprehensive utilization method for the step-by-step conversion of mother liquor in lithium salt production, relating to the field of lithium salt preparation technology. The method includes: feeding lithium enrichment transformation liquid A (after liquid shaping) and sodium carbonate solution B1 into a micro-liquid membrane reactor MMR-101, where underequivalent transient nucleation occurs under conditions of η1 of 0.55-0.68; the resulting nucleated slurry enters the first-stage continuous crystallizer G1, where sodium carbonate solutions B2, B3, and B4 are distributedly added along the effective residence time axis; then it enters the second-stage continuous ripening crystallizer G2, where sodium carbonate solution B5 is added at the G2 inlet; and lithium carbonate is obtained through low-shear ripening, hot solid-liquid separation, hot displacement washing, and low-temperature vacuum drying. This method can suppress localized excessive nucleation and pulverization, reduce Na, S, and B entrainment, narrow particle size distribution, increase filtration flux, reduce washing water consumption, and extend continuous stable operation time.

This application discloses a method for using a synergistic enhancer in SNCR system denitrification, relating to the field of flue gas denitrification technology. The method includes the following steps: S1, preparation of the synergist composition: including potassium acetate, sodium carbonate, and water, the above raw materials are placed in a synergist preparation tank and stirred to prepare a synergist solution; S2, ammonia water delivery: the ammonia water solution is delivered through an ammonia water delivery pipeline; S3, delivery and mixing of the synergist solution for denitrification: the synergist solution is delivered to the ammonia water delivery pipeline through a synergist delivery device, so that the synergist solution and the ammonia water solution are mixed to obtain a mixed solution, which is then sprayed into the incinerator furnace for denitrification reaction. This application uses potassium acetate and sodium carbonate in a specific ratio to form a denitrification enhancer, which has a simpler structure, is easier to prepare, and requires a lower synergist dosage, effectively reducing the raw material and preparation costs of denitrification operations in incinerators, and significantly improving denitrification efficiency and reducing NOx emissions.

To minimize, or even eliminate, the use of sodium carbonate in a glass recipe, including a mixture of raw materials for the manufacture of glass wool, while retaining the main properties of glass necessary for the barrier properties of glass wool. [Solution] A glass composition for barrier fibers, comprising, by mass percent: SiO2: 62.0%~65.0%, Na2O: 14.0~15.5%, CaO: 6.0~9.0%, MgO: 1.5~4.0%, B2O3: 5.5~7.5%, Al2O3: 1.5~2.5%, K2O: 0~2.0%, one or more other oxides: cumulatively 0~5.0% by weight, preferably cumulatively 0~2.0% by weight, and having a Na2O / B2O3 ratio between 1.90 and 2.80; a glass composition; barrier fibers obtained from the composition; and a method for producing such fibers.

This invention provides a low-cost and environmentally friendly papermaking pulping process, comprising the following steps: S1. Pretreatment of papermaking fiber plant raw materials. S2. Oxy-alkali cooking: The pretreated papermaking fiber plant raw materials are mixed with an aqueous sodium carbonate solution, and cooked for 0.5–5 hours using oxygen as an oxidant. Then, sodium hydroxide is added, and cooking continues for 0.3–2 hours. Finally, the pulp and black liquor are separated by pressing. S3. Black liquor treatment: The black liquor is mixed with fiber waste, pressed, and burned as biomass fuel. S4. Recovery and causticization. This papermaking pulping process uses sodium carbonate and a small amount of sodium hydroxide for staged oxy-alkali pulping, and the generated black liquor is mixed with fiber waste and burned to recover sodium carbonate and heat, reducing the causticization rate and pulping costs.

The application provides a composite vegetable oil emulsification system, a preparation method and application thereof, and relates to the technical field of cosmetics.The composite vegetable oil emulsification system is composed of the following components in parts by weight: 40-60 parts of white pool rape seed oil, 20-40 parts of water, 5-15 parts of beeswax, 2-4 parts of sodium carbonate, 0.5-1.5 parts of octyldodecanol, 1.2-2.8 parts of agave sisalina leaf and seed oil, 1.2-2.8 parts of cyperus oil and 0.5-1.5 parts of malva sylvestris root extract; a low-temperature saponification reaction method is adopted, primary saponification can be realized at 45-49 DEG C, then secondary reaction is carried out by heating to 65-75 DEG C to obtain a stable emulsification system. The vegetable oil with specific components is the core, is compounded with cyperus oil and malva sylvestris root extract, the composite vegetable oil emulsification system obtained has multiple effects of mild long-acting moisturizing and high-efficiency anti-inflammatory soothing, has high stability, and has small particle size and PDI.

The invention discloses a method for preparing a cobaltous sulfate solution and cobaltous sulfate crystals by using cobalt-containing solid raw materials, which comprises the following steps of: carrying out slurrying pretreatment on the cobalt-containing solid raw materials such as cobalt concentrate, cobalt slag or waste lithium battery positive electrode materials and the like as starting materials; through continuous operation of multi-stage dissolution and multi-stage iron removal (an oxygen and sodium carbonate iron removal system is adopted to replace a traditional sodium hypochlorite and sodium carbonate iron removal system), the cobalt leaching rate is larger than or equal to 97%; subsequently, P204 extraction and impurity removal, P507 nickel-cobalt separation, oil removal and purification are carried out, and a high-quality cobalt sulfate solution is obtained; the solution can be directly supplied to a ternary product production line in a short distance (less than or equal to 8km), or through MVR evaporation concentration, Olso cooling crystallization, centrifugal separation and drying, cobalt sulfate crystals suitable for long-distance transportation are obtained. Meanwhile, MVR evaporation condensate water and high-impurity centrifugal mother liquor are returned to be used for preparing reverse extraction acid needed by P507 extraction, dryer steam condensate water is returned to be used for heating of the slurrying procedure, cyclic utilization of water resources and energy in the whole process is achieved, and the method is suitable for industrial production of high-quality cobalt sulfate products.

The present application relates to the technical field of sodium percarbonate preparation, and particularly relates to a sodium percarbonate production method, device and application. The method comprises the following steps: preheating centrifugal mother liquor generated in the sodium percarbonate production process to a temperature above the decomposition temperature of hydrogen peroxide to decompose the hydrogen peroxide, then evaporating and concentrating to obtain a salt-containing slurry, and performing solid-liquid separation to obtain recovered salt; mixing the recovered salt with sodium carbonate, reused mother liquor and a stabilizer to prepare an alkali liquor; adding the alkali liquor and a hydrogen peroxide preparation liquor into the reused mother liquor to perform reaction to obtain a crystal seed slurry; adding the crystal seed slurry into the reused mother liquor, and then simultaneously adding the alkali liquor and the hydrogen peroxide preparation liquor to perform reaction crystallization to obtain sodium percarbonate. The method forms a complete closed-loop production process from mother liquor treatment, salt recovery to crystal seed preparation and reaction crystallization, and has advantages in resource utilization rate, environmental protection performance, automation degree and operation economy.

This utility model relates to the field of fireworks shell production technology and discloses a waste recycling device for fireworks shell processing and production. It includes a workbench with baffles fixed on both sides of its surface. A first conveyor belt for feeding is provided on one side of the workbench surface, and a second conveyor belt for discharging is provided on the other side. An action plate is rotatably mounted on the surface of the baffles, and a grid is fixed on the surface of the action plate. In use, the waste material is conveyed by the first conveyor belt. Then, under the action of a stirring mechanism and a vibration mechanism, the action plate drives the grid to vibrate, causing the waste material to fall from the grid, achieving the separation of waste material and large debris. Finally, under the action of the stirring mechanism, the waste material and sodium carbonate solution in the stirring tank are stirred and mixed, improving the mixing efficiency of the waste material and sodium carbonate solution and enhancing the practicality of the device.

The application discloses a PTA biochemical discharge water recycling hardness removal process improvement method. The method replaces the traditional double-alkali hardness removal method with a weak-acid sodium bed process, can easily reduce the calcium and magnesium hardness to below 5 mg / L, and can directly serve as the water inlet of subsequent reverse osmosis without adding a scale inhibitor. In the application, the sodium bed process is introduced into the hardness removal process of water recycling, and a weak-acid cation exchange resin is used as an exchange carrier, so that the ion exchange capacity is greatly improved, the calcium and magnesium ions can be easily removed without adding additional alkali or sodium carbonate. Meanwhile, on one hand, the high flow rate of the cation exchange tank body is utilized to improve the treatment capacity and reduce the land occupation area; on the other hand, the weak-acid cation has high selectivity to hydrogen ions, the resin regeneration is complete, and the produced water quality is stable. The hardness-removed water obtained by the process can directly enter the reverse osmosis membrane filtration, no scale inhibitor needs to be added, and the recycling rate of PTA wastewater is greatly improved.

The utility model relates to the technical field of sodium percarbonate production, and disclose a production device of dyed sodium percarbonate, including dyeing cylinder and support, the dyeing cylinder is connected with the surface fixedly, the dyeing cylinder top is provided with the shunt mechanism and drive mechanism, the dyeing cylinder surface top hinged has the feeding door, the dyeing cylinder top center rotatable connection has the spray pipe, the spray pipe surface is fixed with the connecting disc, the connecting disc is located the below of dyeing cylinder inner wall top, dyeing cylinder inner wall top is fixed with annular pipe, the annular pipe bottom is connected with a plurality of first shower nozzle, the spray pipe surface is connected with a plurality of second shower nozzle, the dyeing cylinder bottom is connected with the discharge valve. This production device of dyed sodium percarbonate, through the organic cooperation of each component, realized the efficient uniform dyeing of sodium percarbonate, from feeding, spray dye, stirring mixing to discharge, formed a complete smooth production process, improved production efficiency and product quality.

The application belongs to the technical field of biomedical materials, and discloses a acutine-chitosan / calcium carbonate hemostatic sponge as well as a preparation method and application thereof. The acutine and chitosan are condensed to obtain acutine-chitosan, and then the acutine-chitosan is reacted with sodium carbonate, calcium hydroxide and urea to form the acutine-chitosan / calcium carbonate hemostatic sponge. In-vivo and in-vitro experiments verify that the sponge can be used for hemostasis and antibiosis, and due to the pH sensitivity of the acutine-chitosan, the acutine can be intelligently controlled to be released under acidic conditions (cancer acidic environment), so that the sponge can be used for rapid hemostasis during cancer surgery, and also helps to prevent recurrence of liver cancer after surgery. Therefore, the multifunctional acutine-chitosan / calcium carbonate hemostatic sponge of the application provides a 'one-stop' synergistic strategy for intraoperative hemostasis and postoperative prevention of tumor recurrence of liver cancer, and has great clinical application potential.

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

The present invention involves immersing beef or pork in alkaline water, carbonated water, a sodium bicarbonate solution, or a sodium carbonate solution, and then removing it. This relates to a method for manufacturing a processed grilled meat product in which beef or pork is aged in pear juice and then baked in an oven, and the raw meat By improving pH, swelling degree, water retention, and tenderness during cooking, it has the greatest influence on the palatability of grilled meat products. By providing processed grilled meat products with improved texture, grilled meat products such as galbi and bulgogi are introduced to foreigners Overcoming the limitation that, despite its high popularity, it has not become mainstream because it is difficult for foreigners to cook it themselves outside of Korean restaurants New possibilities for Korean food franchises providing grilled meat products that are complex, fast, and standardized in taste and quality We can contribute to the globalization of Korean food by opening [it].

This invention relates to compositions, particularly aqueous compositions, comprising: (a) guanidine and / or at least one unsubstituted guanidine salt, and (b) one or more carbonate compounds selected from sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, ammonium bicarbonate, and ammonium carbonate. The compositions are characterized in that the weight ratio of component (a) to component (b) is in the range of 1:14 to 54:1, and in each case, the weight ratio is determined based on the content of guanidine and carbonate ions in the entire composition. The invention further relates to industrial products comprising the compositions of the invention, and the use of the compositions for stabilizing aqueous industrial products against microbial invasion.

The application relates to the field of resource recycling, and specifically discloses a method for recycling waste lithium battery positive electrode materials from electrolytic gas field water. The method comprises the following steps: preparing sodium hydroxide and sodium carbonate solids; sequentially treating the gas field water with the sodium hydroxide and the sodium carbonate to precipitate and remove impurity ions such as magnesium and calcium, and obtaining pretreated gas field water; taking the pretreated gas field water as an electrolyte, placing waste lithium battery positive electrode materials in an anode chamber of an ion membrane electrolytic cell, performing constant current electrolysis by relying on green power of a natural gas well site, leaching valuable metals from the anode, synchronously generating hydrogen and precipitating metals at the cathode, and synchronously outputting chlor-alkali products from the anode; after electrolysis, solid-liquid separation is performed on materials at the two poles respectively, finally, the anode liquid and the cathode liquid are mixed to co-precipitate residual metal ions, mixed metal precipitates are obtained after filtration, and the product can be used for lithium battery positive electrode material regeneration. The application couples gas field water treatment and battery recycling, treats waste with waste, does not need to add acid and alkali, and has a green and low-carbon process, so that the utilization of waste resources is realized and high value utilization is achieved.

This invention relates to an integrated, staged, coupled softening system for high-hardness, high-silica water, a precise dosing method for reagents, and a control method. It belongs to the field of water treatment technology and is applicable to reverse osmosis influent pretreatment scenarios such as industrial high-salt, high-hardness wastewater and coal chemical wastewater. The system adopts a five-stage integrated nested coupled reaction-separation structure, integrating the sodium hypochlorite-enhanced oxide-magnesium agent silicon nucleation zone, lime softening zone, sodium carbonate causticizing zone, synergistic ripening zone, and pre-precipitation zone into a cylindrical shell; simultaneously establishing a Ca... 2+ Mg 2+ SiO2, COD, A eff H total This invention employs a six-element coupled reagent dosing model, coupled with a six-dimensional closed-loop intelligent coupled control module and a deep treatment integration module. It is applicable to pretreatment scenarios of high-salt, high-hardness, and high-silica wastewater with hardness of 100~4000 mg / L and COD of 50~120 mg / L, significantly improving effluent compliance to over 99.8%, reducing reagent dosing error to ≤5%, saving 25%~35% on reagent usage, reducing footprint by 65%~80%, and reducing sludge SV30 to ≤25%. It solves the problems of inaccurate reagent dosing, large footprint, low removal efficiency of complex pollutants, and poor sludge properties associated with traditional processes.

This invention relates to the field of sodium-ion battery electrode materials technology, and provides a method for the complete dissolution preparation of a carbon-coated sodium carbonate pre-sodiumizing agent: sodium polyacrylate and disodium iminodiacetic acid are added to deionized water and stirred until completely dissolved to form a homogeneous and transparent mixed aqueous solution; the solution is then spray-dried and granulated to obtain spherical precursor microspheres; the precursor microspheres are calcined at 450-950℃ for 0.5-12 hours under an inert atmosphere, and after natural cooling, the carbon-coated sodium carbonate pre-sodiumizing agent is obtained. This invention also provides the carbon-coated sodium carbonate pre-sodiumizing agent prepared by the above method and its applications. The preparation process of this invention is simple, the raw materials are inexpensive and readily available, and the resulting product has good particle dispersibility, no obvious agglomeration, uniform and complete carbon coating, excellent desodiumization performance, and high pre-sodiumization efficiency. It can significantly improve the initial coulombic efficiency and cycle stability of sodium-ion full batteries, is compatible with existing battery industrial production systems, and has good prospects for industrial application.

Disclosed herein are penetration compositions comprising a 1,3-propanediol carrier and a binder or a copper-based wood penetration composition. The binder can be, e.g., sodium silicate, sodium carbonate, trisodium phosphate, potassium silicate, lithium silicate, magnesium silicate, calcium silicate, ammonium silicate, or a combination thereof. Also disclosed herein are methods of improving stability and penetration of binder into a substrate comprising impregnating the substrate with the presently disclosed penetration compositions.

This invention discloses a method for preparing a GLP-1R receptor agonist and a method for preparing its intermediates. The method for preparing the GLP-1R receptor agonist and its intermediates comprises a method for preparing a compound of formula I-1, which includes the following steps: in the presence of an inorganic base, a compound of formula I-1-6 and a compound of formula I-1-7 are subjected to a substitution reaction in a solvent to obtain a compound of formula I-1; wherein the inorganic base includes one or more of potassium carbonate, potassium bicarbonate, sodium carbonate, and sodium bicarbonate. This method has the advantages of high yield and low cost in the preparation of GLP-1R receptor agonists and their intermediates, and shows good application prospects.

The utility model relates to a kind of methyl anthranilate production water washing devices, belong to water washing equipment technical field, including neutralization tank, stirring equipment, effluent pipe, centrifugal extractor one, water washing tower, filler layer, water distributor, effluent pipe is connected with centrifugal extractor two, the top of neutralization tank is equipped with conical distribution inner tube, the outside of distribution inner tube is equipped with circular outer tube, the bottom of circular outer tube and distribution inner tube fixed place evenly are equipped with multiple connecting neutralization tank liquid guide pipe, the top of circular outer tube is fixed with liquid inlet pipe, and material inlet pipe and sodium carbonate solution inlet pipe are connected on liquid inlet pipe.The utility model makes reaction liquid and sodium carbonate solution can be fully mixed and evenly distributed before entering neutralization tank, combined with the stirring effect of stirring equipment, greatly improve the efficiency and sufficiency of neutralization reaction, improve separation efficiency, significantly increase two-phase contact area, and water washing efficiency is improved.