209 results about "Sodium formate" patented technology

A long-term fire retarding biochemical liquid composition including: a dispersing agent realized in the form of a major amount of water, for dispersing alkali metal ions dissolved in the water; a major amount of a first fire retarding agent realized in the form of a primary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, tripotassium citrate, for providing metal potassium ions dispersed in the water when the at least one alkali metal salt is dissolved in the water to form a mixed retardant solution; a minor amount of a second fire retarding agent realized in the form of a secondary alkali metal salt of a nonpolymeric saturated carboxylic acid, for example, potassium, sodium, calcium and / or magnesium benzoate, for providing benzoate ions dispersed in the water when the secondary alkali metal salt is dissolved in the mixed retardant solution, for functioning as a secondary fire retardant agent.

The invention discloses an efficient wet desulfurization synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The efficient wet desulphurization synergist comprises the following raw materials in parts by weight: 10-20 parts of sodium formate, 5-10 parts of citric acid, 20-30 parts of binary acid, 5-6 parts of a surfactant, 15-20 parts of magnesium salt, 12-18 parts of sodium salt and 2-5 parts of a pH buffer agent. The preparation method comprises the following steps: reacting cyanuric chloride with lauryl amine to generate a monosubstituted compound; then reacting with L-asparaginic acid to generate a disubstituted compound; reacting with diethylenetriamine to generate a bis-triazine ring compound; and finally, reacting with sodium 2-chloroethanesulfonate to generate the surfactant. The high-efficiency wet desulphurization synergist prepared by the invention has a desulphurization effect.

This invention relates to the field of water treatment technology, specifically to a reverse osmosis membrane cleaning agent composed of a non-oxidizing bactericide and an enzyme, and its application. Its main purpose is to remove biofouling from reverse osmosis membranes and restore membrane flux. This patent discloses a novel reverse osmosis membrane cleaning agent formulation. Considering the different pH requirements of the cleaning agent in actual production, different types of bioactive hydrolytic enzymes are selected to disrupt the structure of bacterial cell walls and their extracellular polymers. A reducing agent and a non-oxidizing bactericide are combined to enhance the cleaning effect of the reverse osmosis membrane. For different cleaning purposes, non-oxidizing bactericides suitable for acidic and alkaline cleaning are formulated. Sodium benzoate and benzalkonium chloride show good application prospects in the removal of reverse osmosis membrane fouling.

The utility model discloses a thermal hydrolysis cyanide breaking device, which relates to the technical field of wastewater treatment and comprises a cyanide breaking reactor, a wastewater heat exchanger, a pipeline mixer, a steam mixer, an instrument control valve and the like. After being heated by the wastewater heat exchanger, the wastewater enters a cyanide breaking reactor, and steam enters a steam mixer to heat the wastewater to a specified temperature and then enters the cyanide breaking reactor. The characteristic that the cyanide aqueous solution is easy to hydrolyze is utilized, so that the cyanide aqueous solution is hydrolyzed at the temperature of higher than 140 DEG C to produce sodium formate and ammonia, the toxicity of cyanide is eliminated, high-temperature wastewater discharged from the cyanide breaking reactor enters the wastewater heat exchanger to exchange heat with wastewater to be treated, and heat is recovered; the pressure of the reactor is controlled through a wastewater heat exchanger outlet wastewater outlet pipeline pressure regulating valve. The cyanide wastewater treatment device is reasonable in design, only a small amount of sodium hydroxide is needed for adjusting the pH of wastewater, no chemical agent needs to be added in other procedures, the cyanide wastewater treatment efficiency is improved, and the cost is saved.

The invention relates to the technical field of precious metal recovery, in particular to a process for separating precious metal from copper-nickel smelting waste, which comprises the following steps: crushing and grading the waste, adding a sulfuric acid solution containing etidronic acid, leaching, and washing, drying and crushing filter residues to obtain a pretreated material; mixing the pretreated material with a sodium peroxide-sodium carbonate composite flux, roasting, leaching with water, and filtering to obtain a filter residue B; adding a leaching agent containing hydrochloric acid, sodium chlorate and 1, 2-cyclohexanediamine tetraacetic acid into the filter residue B according to the ratio of 1: 3-1: 5, and filtering to obtain filtrate C and filter residue C; adjusting the pH value of the filtrate C to 1.5-2.5, adding an ethanol solution of sodium N, N-diethyldithiocarbamate, precipitating, washing and calcining to obtain sponge palladium; adding ammonium chloride into the filtrate D, precipitating and calcining to obtain sponge platinum; and leaching the filter residue C by using a hydrochloric acid-chloroauric acid mixed solution containing diphenylthiourea, and replacing and calcining zinc powder to obtain crude gold. According to the process, the leaching rates of platinum, palladium and gold and the product purity are greatly improved; flux and reagent systems are optimized, consumption and energy consumption are reduced, waste liquid treatment is matched for up-to-standard discharge, and efficient resource recovery and environment-friendly cooperation are achieved.

The synthesis method comprises the following steps: S1, adding furandicarboxylic acid into a reaction container, adding a certain amount of methanol, adding a double-acid-site strong acid solid catalyst, starting stirring, controlling the reaction temperature to carry out esterification reaction, and after the reaction is finished, filtering, washing and drying to obtain furandihydrazide; separating out the double-acid-site strong acid solid catalyst to obtain clear liquid, namely dimethyl furandicarboxylate; s2, transferring dimethyl furandicarboxylate serving as a raw material into another reaction container, adding a certain amount of sodium formate serving as a catalyst, then adding a proper amount of hydrazine hydrate, controlling the reaction temperature, keeping a reflux state, reacting for a period of time, cooling to room temperature after the reaction is finished, and performing centrifugal separation to obtain white solid furandihydrazide. The synthesis method has the advantages of simple reaction steps, no need of toxic and harmful catalysts, mild reaction conditions, high conversion rate and high yield, and can realize efficient, green and low-cost production of furandihydrazide.

The invention relates to a composite phase change cold storage material and a preparation method thereof. According to the technical scheme, 60-90 wt% of deionized water, 4-34 wt% of anhydrous sodium formate, 2-5 wt% of anhydrous potassium sulfate and 1-4 wt% of xanthan gum are evenly mixed and dispersed, and a phase change cold storage medium is prepared; the preparation method comprises the following steps: mixing 64-75wt% of absolute ethyl alcohol, 15-20wt% of deionized water, 9-12wt% of nitric acid solution and 1-4wt% of expanded graphite, and standing to obtain dispersion liquid I; uniformly mixing 60 to 70 weight percent of tetrabutyl titanate and 30 to 40 weight percent of absolute ethyl alcohol, so as to obtain dispersion liquid II; uniformly mixing 30-40wt% of the dispersion liquid II and 60-70wt% of the dispersion liquid I under the condition of 70-100 DEG C, filtering and drying to prepare the nano titanium dioxide coated expanded graphite; 30-40 wt% of expanded graphite wrapped by nanometer titanium dioxide and 60-70 wt% of a phase change cold storage medium are subjected to vacuum impregnation and compression molding, and the composite phase change cold storage material is prepared. The prepared product is high in heat conductivity, large in phase change latent heat value, small in supercooling degree and good in cycling stability.

The invention discloses a coal gangue-based ceramic tile adhesive for thin-layer paving and a preparation method of the coal gangue-based ceramic tile adhesive, and belongs to the technical field of adhesives. Comprising the following raw materials: 450-550 parts of composite coal gangue powder, 250-300 parts of ordinary Portland cement, 15-20 parts of copolymer rubber powder, 1-2 parts of hydroxypropyl methyl cellulose, 0.2-0.5 part of starch ether, 5-8 parts of sodium formate, 8-10 parts of reinforced fibers, 10-15 parts of an early strength agent and 180-200 parts of water. Coal gangue powder is subjected to decarburization treatment, reaction activity is improved, the coal gangue powder is adsorbed in filling pores of phase change microcapsules to reduce the water absorption rate and enhance the mechanical property and durability, then a silane coupling agent KH570 solution is used for modification, the water resistance is optimized, and tetrapod-like zinc oxide enhanced fibers, cement, rubber powder and the like are matched to achieve the synergistic effect, so that the waterproof performance is improved. The coal gangue-based ceramic tile adhesive for thin-layer paving is obtained, and the environmental protection and performance requirements are both considered.

The invention relates to the technical field of sodium ion batteries, and discloses a preparation method of a sodium battery additive and application of the sodium battery additive in a sodium battery, and the preparation method comprises the following steps: a) a reaction step: in an isopropanol solvent, enabling pyromellitic acid and sodium hydroxide to react under heating and stirring; after the reaction is finished, filtering a reaction product to obtain a benzene tetracarboxylic acid sodium crude product; b) a purification step: dissolving the benzene tetracarboxylic acid sodium crude product in water, and heating for rotary evaporation until the solution reaches a saturated state; adding methanol into the solution in the saturated state to separate out a solid, and filtering a mixture containing the solid while the mixture is hot; and carrying out vacuum drying on the solid obtained by filtering to obtain the sodium electric additive. According to the invention, the high-purity product is used as the sodium-ion battery additive, and the comprehensive performances of high-temperature circulation, high magnification, low temperature and the like of the battery can be comprehensively and obviously improved through a unique mechanism of synchronously forming a stable protective film on a positive electrode and a negative electrode.

The invention relates to a water treatment agent for advanced treatment of thallium-containing wastewater in nonferrous metallurgy. The water treatment agent is prepared by fully mixing and uniformly stirring the following raw materials in parts by weight: 50-80 parts of a sodium diethyldithiocarbamate aqueous solution with the mass concentration of 5%-15%, 10-40 parts of sulfide or polysulfide and 10-40 parts of sodium thiosulfate. The water treatment agent provided by the invention can realize efficient removal of heavy metal ions, does not need a subsequent treatment process, not only simplifies the treatment process, but also reduces the treatment cost.

The invention discloses a flue gas desulfurization composite synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The desulfurization composite synergist is prepared from the following raw materials in parts by weight: 5 to 10 parts of citric acid, 20 to 30 parts of binary acid, 15 to 20 parts of sodium formate, 15 to 20 parts of sodium salt, 12 to 18 parts of magnesium salt, 2 to 4 parts of surfactant, 2 to 4 parts of pH buffering agent and 5 to 10 parts of calcium oxide. The preparation method comprises the following steps: carrying out a ring-opening reaction on 3-(2-aminoethylamine) propyl methyl dimethoxy silane and glucolactone to obtain an intermediate 1, and then carrying out a two-step quaternization reaction to synthesize the novel surfactant. The prepared desulfurization composite synergist has a good desulfurization effect and is suitable for limestone-gypsum wet flue gas desulfurization.

The invention belongs to the technical field of chemical production, and particularly relates to a novel process for separating pentaerythritol by a membrane method and application of the novel process. The membrane separation comprises the steps of separating sodium formate by using an ion exchange membrane and separating pentaerythritol by using a low-pressure nanofiltration membrane device. The dealdehyding liquid is separated through different membranes, and formic acid, pentaerythritol, dipentaerythritol and other substances can be effectively separated. The process greatly shortens the process flow and saves the cost. According to the technical scheme, the quality and performance of the pentaerythritol product are remarkably improved, the added value of the product is increased, and a new technical scheme is provided for industrial production of pentaerythritol.

The method comprises the following steps: S1, adding a formic acid-sodium formate solution into raw material powder, carrying out high-temperature oil bath, cooling to room temperature, carrying out suction filtration to obtain a supernatant A containing xylooligosaccharide, repeatedly cleaning and carrying out suction filtration until the extracted liquid is neutral, and drying at low temperature to obtain the xylooligosaccharide powder; pre-treated lignin raw materials are obtained; s2, putting the supernate into a dialysis bag, and magnetically stirring to obtain primary dialysis liquid B; s3, putting the preliminary dialysis liquid B into a dialysis bag, and magnetically stirring to obtain dialysis liquid C; s4, concentrating the dialysis liquid C to obtain concentrated liquid D; and S5, pre-freezing the concentrated liquid D, and freeze-drying the sample to obtain xylooligosaccharide powder E. According to the method, formic acid-sodium formate is used as a catalytic medium, different acid concentrations and molar ratios are adopted, high-temperature oil bath and dialysis freeze-drying are utilized for two-step extraction, and the yield of xylooligosaccharide after catalysis is obviously increased.

The present invention discloses a method for synthesizing hydroxytyrosol by multi-enzyme cascade, comprising: 1) preparing a hydroxytyrosol product by using 3,4-dihydroxybenzaldehyde, L-threonine, sodium formate, NAD + As raw material, L-threonine transaldolase, alcohol dehydrogenase, and formate dehydrogenase are used to catalyze the synthesis of L-threo-3-(3,4-dihydroxyphenyl)serine; 2) L-threo-3-(3,4-dihydroxyphenyl)serine is used as substrate, glucose, NAD + Hydroxytyrosol is synthesized through a cascade catalysis of phenylserine dehydratase, α-ketoacid decarboxylase, aldehyde reductase, and glucose dehydrogenase. The synthesis method provided by the present invention achieves a hydroxytyrosol yield of >99% and a space-time yield of 0.88 g / L / h, currently the highest, showing great potential for industrial application and suitable for further promotion and application.

The application relates to the technical field of fine chemical industry, in particular to a circulating reaction device and a method for preparing sodium 3,3',4,4'-biphenyltetracarboxylate by using the same. The circulating reaction device comprises: a batching kettle, a discharging pipeline and a circulating pipeline are arranged on the batching kettle; a reaction unit, an inlet pipeline and an outlet pipeline are arranged on the reaction unit; the inlet pipeline is communicated with the discharging pipeline; the outlet pipeline is communicated with the circulating pipeline; a filler area is arranged in the reaction unit; the fillers of the filler area at least comprise a catalyst; a pump is arranged on the inlet pipeline; a qualified reaction liquid kettle, a qualified liquid inlet pipeline is arranged on the qualified reaction liquid kettle, and the qualified liquid inlet pipeline is communicated with the outlet pipeline; a washing liquid kettle, a washing liquid first pipeline and a washing liquid second pipeline are arranged on the washing liquid kettle, the washing liquid first pipeline is communicated with the outlet pipeline, the inlet pipeline is communicated with the washing liquid second pipeline, and the washing liquid kettle is used for containing washing liquid for washing the catalyst. The application can effectively improve the reaction conversion rate, realize automatic production and improve the production efficiency.

The present invention relates to a method for anaerobic detoxification of coal chemical wastewater, and belongs to the technical field of anaerobic detoxification of coal chemical wastewater. The method comprises pre-treatment to regulate the redox potential of the wastewater to a range of 80mV to 50mV; inoculating a mixed bacterial community of thiocyanate-degrading bacteria and phenol-hydrolyzing bacteria on a polyurethane foam carrier to form a layered biofilm; controlling the redox potential in stages, adding sodium formate under microaerobic conditions to preferentially degrade thiocyanate to produce bicarbonate; adding nano-zero-valent iron to reduce catechol and adsorb cyanide; and adding ethanol and humic acid under strictly anaerobic conditions to degrade phenols. Through the decoupling of bacterial metabolic pathways, the synergistic detoxification of metabolites and the targeted detoxification of nanomaterials, the problems of redundancy of traditional multi-stage reactor equipment, bacterial competitive inhibition and toxic accumulation of intermediate products are solved, and efficient step-by-step degradation of thiocyanate and phenols is achieved in a single reactor, the biodegradability of the wastewater is significantly improved, and a low-toxic environment is provided for subsequent treatment.

The application discloses a polyformaldehyde wastewater comprehensive treatment method, which comprises the following steps: pumping polyformaldehyde wastewater to a gas-liquid mixer, introducing ozone into the gas-liquid mixer to mix with the polyformaldehyde wastewater, preheating, and then entering a fixed-bed catalytic reactor, under the action of a catalyst, the ozone oxidizes formaldehyde and methanol in the wastewater into formic acid; pumping the oxidized material liquid to a neutralization tank, adding sodium hydroxide solution into the neutralization tank, so that the sodium hydroxide reacts with the formic acid in the wastewater to generate sodium formate, pumping the neutralized material liquid to a buffer tank; sending the wastewater in the buffer tank to a two-effect evaporator to evaporate and concentrate, after heat exchange and condensation, the steam flows into a wastewater tank, the residual wastewater is pumped to a sewage treatment plant for treatment and discharge, the concentrated liquid is cooled and flows into a concentrated liquid storage tank, and the concentrated liquid can be used as a single carbon source or a raw material of a composite carbon source to be regularly loaded and sold. The application fully recycles useful components in the polyformaldehyde wastewater, by-products of 20-30% sodium formate solution products are obtained, and resource waste is avoided to the maximum extent.

The invention provides a moisturizing dust suppressant and a use method thereof, and relates to the technical field of dust suppression. The moisturizing dust suppressant is prepared from the following raw materials in percentage by mass: 18 to 43 percent of glycerol, 0.1 to 0.6 percent of guar gum, 3 to 8 percent of magnesium sulfate, 0.1 to 0.3 percent of sodium dodecyl benzene sulfonate, 1 to 3 percent of sodium benzoate and the balance of water, wherein the mass of the raw materials is 100 percent. The use method comprises the following steps: selecting the spraying concentration of the moisturizing and dust suppressing agent according to the road condition of a target road, and selecting the nozzle type of the spraying facility for spraying according to the spraying requirement; the road conditions comprise municipal roads and slag roads; the spraying requirement comprises the spraying area or the spraying uniformity of the spraying operation. According to the moisture-preserving dust suppressant, the dust concentration is remarkably reduced, the safety of an operation environment is improved, and the loss of coal resources is reduced. In addition, by means of the spraying method, the use efficiency and economic benefits of the dust suppressant are remarkably improved, and the problem that a traditional spraying mode is poor in effect in a complex application scene is effectively solved.

The invention discloses an alpha-dideuterium methylated sulfone compound as well as a synthesis method and application thereof, and belongs to the field of organic chemistry. In an air atmosphere, benzyl methyl sulfone and 2-((3, 5-dimethyl-4-methoxypyridine-2-yl) methylsulfonyl)-5-methoxy-1H-benzo [d] imidazole are used as substrates, in the presence of a catalyst [Cp * IrCl2] 2 and cesium carbonate, deuterated paraformaldehyde is used as a carbon source, sodium formate is used as an additive, and the alpha-dideuterium methylated sulfone compound is obtained through a reaction in an acetonitrile solvent at 120 DEG C. The reaction does not need to use a ligand and hydrogen, the reaction is simple and efficient, the potential value of the compound in medicinal chemistry is shown, and the compound has a certain inhibition effect on H3N2 subtype influenza viruses and has remarkable application potential.

A patch composition for targeting herpes virus comprising the following ingredients: a patch base, trisodium phosphate, malic acid, sorbitol, sodium benzoate, cellulose gum, peppermint, sodium saccharin, naringin, wind wheel grass extract, xanthan gum, polyethylene glycol-8, calcium carbonate, hydroxyethyl cellulose, hydroxypropyl guar gum, sodium nitrate, hydrated silica, sodium lauryl sulfate, strontium chloride hexahydrate, tranexamic acid, two-faced needle extract, sodium monofluorophosphate, sea salt, potassium nitrate, sodium chloride, and purified water q.s.

This invention discloses a method for the continuous synthesis of benzoic acid from sodium benzoate mother liquor, comprising the following steps: (1) continuously pumping sodium benzoate mother liquor into a high-temperature acidification kettle, adding hydrochloric acid dropwise, controlling the pH value to 1~2, and the reaction temperature to 97~100℃; (2) overflowing the acidification mother liquor into a cooling kettle #1 to reduce the temperature to 70~80℃; (3) overflowing part of the acidification mother liquor in the cooling kettle #1 into a dispersion kettle as a dispersion mother liquor, and overflowing part of the acidification mother liquor into a cooling kettle #2; reducing the temperature to below 40℃; adding crude benzoic acid to the dispersion kettle to increase the concentration of benzoic acid, and then returning it to the high-temperature acidification kettle; (4) centrifuging the acidification mother liquor in the cooling kettle #2 into a centrifuge and then discharging it into a crude benzoic acid buffer tank, part of the crude benzoic acid into the dispersion kettle, and the remaining crude benzoic acid dried and discharged to obtain the finished benzoic acid. This invention utilizes continuous high-temperature acidification of sodium benzoate mother liquor and increases the concentration of benzoic acid during high-temperature acidification, resulting in high-quality benzoic acid with high production efficiency.

The invention discloses a mosquito luring agent gel composition as well as a preparation method and application thereof, and relates to the technical field of daily chemical industry. The composition provided by the invention has a gel dosage form and comprises a gel matrix and a long-acting mosquito-luring component, the long-acting mosquito-luring active component is mainly tea-flavor ketone, meanwhile, sodium benzoate is added to be compounded with the tea-flavor ketone, and the sodium benzoate can realize slow release of the tea-flavor ketone through intermolecular interaction with the tea-flavor ketone. Meanwhile, the introduction of sodium benzoate can also adjust the microstructure of the obtained gel, has important influence on the texture of the gel, and can improve the stability of the gel. Based on the introduction of sodium benzoate and the gel formulation, the water-retaining property of the gel and the slow release of tea flavor ketone are remarkably improved, the durability of mosquito trapping activity is prolonged, the mosquito trapping rate within 72 hours is stabilized to be 58% or above, the reduction degree is not higher than 27.5% compared with the mosquito trapping rate after 24 hours, and the gel has excellent large-scale application prospects.

The application provides a fluorapatite phosphate ore reverse flotation magnesium removal collector and application thereof, which comprises basic substances and water, and the basic substances are mixed according to the mass ratio, wherein the ratio of fatty acid soap, surfactant and additive is 11:3:2; the fatty acid soap is one or a mixture of two of sodium oleate, oxidized paraffin soap; the surfactant is one or any ratio of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, sodium citrate, sodium acetate and sodium benzoate; and the additive is sodium naphthenate. The fluorapatite phosphate ore reverse flotation magnesium removal collector provided by the application can effectively separate apatite and dolomite, significantly improve the collecting capacity and selectivity by adding surfactants and additives, and the surfactant composition weakens the influence of Fe 3+ on the flotation system.

The invention relates to an efficient multifunctional cleaning agent for a medical endoscope and a preparation method of the efficient multifunctional cleaning agent, and belongs to the technical field of medical cleaning. The cleaning agent is prepared from isopropyl alcohol, glycerol, propylene glycol, TritonX-100, fatty alcohol-polyoxyethylene ether, mannitol, 4-FPBA, hydroxytyrosol, sodium formate, benzisothiazolinone, a multienzyme compound and deionized water according to a specific ratio. The preparation method comprises the steps of step-by-step dissolution, temperature-controlled mixing and low-temperature enzyme adding. The cleaning agent can effectively remove stubborn stains such as protein and fat on the surface of an endoscope (the removal rate is larger than or equal to 90%), the bacteriostasis rate on escherichia coli and staphylococcus aureus is larger than or equal to 99%, and corrosion to stainless steel, rubber and plastic materials is avoided. Experiments show that the enzyme activity retention rate of the multienzyme compound still reaches 80% or above after the multienzyme compound is stored for 2 years, and the technical problems that an existing cleaning agent is not thorough in decontamination, poor in antibacterial activity and capable of corroding equipment are solved.

The utility model discloses anti-blocking filtering equipment for processing trimethylolethane, which comprises a filtering box, a bracket is fixedly arranged in the filtering box, and a collecting hopper is fixedly arranged on the bracket and is used for collecting impurity liquid; and the rotatable filter cartridge is arranged in the collecting hopper and is used for filtering a trimethylolethane reaction solution. According to the anti-blocking filtering equipment for trimethylolethane processing, the problem that in the existing trimethylolethane processing process, due to the fact that suspended solids such as sodium formate or calcium formate are prone to being attached and accumulated on the surface of the filter cylinder, the filtering efficiency is reduced is solved.

The embodiment of the invention discloses a pharmaceutical composition for treating gastrointestinal cancer and a pharmaceutical preparation. The pharmaceutical composition is prepared from the following raw materials in parts by weight: 1-3 parts of sodium bicarbonate, 0.01-0.5 part of phenol, 3-10 parts of sodium sulfate and 3-5 parts of sodium formate. The pharmaceutical composition disclosed by the invention has remarkable advantages in the aspect of treating gastrointestinal tract cancer, not only can effectively prevent cancer cell diffusion and realize focus elimination, but also can provide a safer and more effective treatment method for patients, improve the living quality and reduce the treatment cost.

An integrated energy system comprising a power plant including at least one nuclear reactor and an electrical power generation system, the at least one nuclear reactor being configured to generate steam, and a supercritical water oxidation system operably coupled to the power plant. The supercritical water oxidation system including a desalination plant configured to produce first water and brine, a chlor-alkali membrane process configured to receive the brine and produce at least a Sodium Hydroxide solution, a reactor configured to receive the first water, the steam, and the Sodium Hydroxide solution to produce a waste solution and a solid waste, and a separator configured to receive the waste solution and produce Carbon Dioxide and second water.

The invention discloses a complexing inhibitor for inhibiting redissolution of heavy metal sulfide as well as a preparation method and application of the complexing inhibitor. The complexing inhibitor is prepared by compounding the following three components: a component A which is a metal salt, a component B which is an organic sulfur medicament and a component C which is an organic non-sulfur medicament, wherein the mass ratio of the component A to the component B to the component C is (1-2): (1-3): (2-6); the component A is selected from dithiocarbamate, and the component B is selected from at least one of dithiocarbamate, mercaptobenzothiazole or sodium dimethyl dithiocarbamate; and the component C is selected from at least one of chitosan, polyethyleneimine or 1-hydroxyethylidene-1, 1-diphosphonic acid. The inhibitor is especially suitable for preventing excessive sulfur ions from complexing and dissolving precipitated heavy metal sulfide in industrial wastewater treatment, and effectively controlling the concentration of heavy metal ions to rise.

A green synthesis method of azoxybenzene compounds, in an organic solvent, using aromatic amine or aromatic heteroamine as raw material, using an oxidant and a catalyst to form a reaction system, selectively oxidizing the aromatic amine into the corresponding azoxy compound; wherein the catalyst is one or several of NaOAc, sodium formate, KF, NaF, CsF, CaF2 and R''4NF, wherein R'' is one of alkyl, methyl, ethyl and butyl; the catalyst used in the application has low cost, high activity, good selectivity and small environmental pollution compared with the metal catalyst of the prior art, and conforms to the green environmental protection concept; at the same time, the catalyst has small dosage, and does not need to consider catalyst recovery treatment and other problems, greatly simplifying the operation steps.