68 results about "Nitrogen oxide" patented technology

Aiming at the problems of large flue gas nitrogen oxide generation amount, easy exceeding and serious pollution possibly existing in ammonia gas blending combustion, the invention provides an ammonia gas out-of-furnace bypass combustion blending combustion oxidation method, which comprises the following steps: preparing NO2 by virtue of an ammonia combustion system, generating O.free radicals by virtue of photo-thermal cracking of NO2, oxidizing NO in flue gas into NO2, cracking NO2 into N2, removing NO by virtue of NO2, and performing denitration by virtue of denitration, so that the nitrogen oxide in the flue gas is not easily generated. According to the method, SO2 is oxidized into SO3 through O.free radicals, the SO3 reacts with calcium for desulfurization, CO and VOCs are oxidized into CO2 and H2O, collaborative purification of multiple pollutants is achieved, reduction denitration and wet desulfurization are replaced and used for denitration and desulfurization of combustion flue gas and collaborative treatment of the multiple pollutants, and deep pollution reduction, carbon reduction, energy conservation and efficiency improvement are achieved.

The present application relates to a kind of carbon monoxide sensor with resistance to multiple gas and detection method, belong to coal mine environment gas detection sensor field.The present application includes carbon monoxide sensor, and the method of gas detection of the sensor.Therein, sensor mainly includes carbon monoxide / hydrogen sulfide dual gas detection module, nitrogen oxide detection module, modular mainboard, main shell and main shell display window, wherein carbon monoxide / hydrogen sulfide dual gas detection module and nitrogen oxide detection module measure the gas to be measured.The present application carries out gas concentration value calculation using cross interference compensation algorithm, and the concentration of carbon monoxide gas in coal mine environment is accurately detected by setting different working modes.The present application realizes the real-time monitoring of carbon monoxide, nitrogen oxide and hydrogen sulfide multi-component gas concentration by carbon monoxide, nitrogen oxide, hydrogen sulfide composite electrochemical element design, improves the precise perception ability of intelligent mine, and guarantees coal mine safety production.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

The utility model discloses a reaction device for normal-pressure leaching of nitric acid, which is characterized in that in the reaction process, nitric oxide in a reaction kettle enters an absorption tower through a nitric oxide exhaust outlet, a first pipeline and a nitric oxide gas inlet, and an oxygen supply device supplies oxygen to the absorption tower; an absorption liquid circulating pump I conveys an absorbent in the absorption tower circulating device to an absorbent circulating inlet I and enters the absorption tower, the absorbent absorbs nitric oxide gas to form nitric acid, nitric oxide released in the process reacts with oxygen to generate nitrogen dioxide, and the nitrogen dioxide reacts with the absorbent to generate nitric acid; according to the device, nitrogen oxide gas generated in the reaction process can be absorbed, the obtained absorption acid (nitric acid) can be cyclically applied to the leaching reaction, and tail gas can be discharged after reaching the standard. And the method is environment-friendly.

To provide a memory device having a switching element with excellent characteristics. [Solution] The memory device of the embodiment includes a memory cell comprising: a first conductive layer; a second conductive layer; a third conductive layer between the first and second conductive layers; a switching layer between the first and third conductive layers; and a resistive switching layer between the third and second conductive layers. The switching layer comprises an oxide, nitride, or oxynitride of a first element selected from the group consisting of Al, Si, Ge, Zr, Y, Ta, La, Ce, Ti, Hf, and Mg; a second element, different from the first element, selected from the group consisting of Al, Zn, Sn, Ga, and In; and a third element selected from the group consisting of Te, S, Se, and Sb. The switching layer includes a first region and a second region, wherein the sum of the atomic concentrations of the second element and the third element in the first region is greater than the sum of the atomic concentrations of the second element and the third element in the second region.

This invention discloses an integrated treatment method for desulfurization, denitrification, and waste heat recovery of coke oven flue gas, belonging to the field of coke oven flue gas treatment technology. The method includes: 1) flue gas pretreatment and high-temperature waste heat recovery; 2) directional oxidation conversion of nitrogen oxides and removal of residual oxidants; 3) synergistic desulfurization and denitrification treatment with activated carbon / activated coke; 4) side reaction suppression and control; 5) low-temperature waste heat recovery and reheat utilization; and 6) activated carbon / activated coke regeneration and sulfur resource recovery. This invention converts NO in flue gas into high-valence NO₂ through a pre-oxidation reaction, improving the kinetics of the denitrification reaction, increasing denitrification efficiency, and reducing ammonia consumption. By controlling the SO₂ concentration and acid gas content at the desulfurization layer outlet, it effectively inhibits the deposition of ammonium salts such as (NH₄)₂SO₄ and NH₄Cl, reducing bed blockage. Through high and low temperature staged waste heat recovery, it achieves tiered utilization of heat, improving the overall thermal efficiency of the system. This achieves synergistic optimization of efficient pollutant removal and efficient energy utilization.

This invention discloses a room-temperature phase pyroelectric material and its preparation method, relating to the field of pyroelectric material technology, with the chemical formula C4H. 14 N₂OPbCl₄ is prepared as follows: 2-Dimethylaminoethylamine is cooled and stirred in an ice-water bath, then hydrogen peroxide solution is added dropwise while stirring. After the reaction, the resulting reaction solution is vacuum dried to obtain the nitrogen oxide of 2-dimethylaminoethylamine. The nitrogen oxide of 2-dimethylaminoethylamine and lead chloride are added to a concentrated hydrochloric acid solution, heated in an oil bath, and stirred to obtain a pyroelectric material. The pyroelectric material of this invention has a perovskite structure and undergoes a reversible phase transition reaction at a phase transition temperature of 27°C. During the phase transition, a current is generated at the polar axis of the crystal. The phase transition temperature at room temperature allows the pyroelectric material to operate within a relatively stable temperature range, providing reliable energy collection performance and showing great application value in waste heat utilization, self-sustaining systems, and other fields.

The invention belongs to the technical field of organic synthesis, and discloses ketoxime ether as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a ketoxime compound, tert-butyl alcohol and alkali to obtain a mixed solution; and adding a methylation reagent into the mixed solution, and reacting to obtain ketoxime ether. The preparation method is low in raw material cost and simple in process operation; tert-butyl alcohol is used as a solvent, sodium tert-butoxide is used as an alkali source, no water participates in the reaction process, ketoxime hydrolysis is effectively reduced, side reactions are greatly reduced, the yield of the obtained product is high, and subsequent separation and solvent recycling are facilitated; use of toxic substances such as sulfur dioxide and sodium nitrite is avoided, and emission of toxic gases such as nitrogen oxides is reduced; and the process safety risk is reduced, and the method is safe, reliable, simple and feasible.

The invention relates to the technical field of synthesis of chlorine-containing pyridine intermediates, and discloses a method for synthesizing 2, 3, 4, 5-tetrachloropyridine by using 2, 5-dichloropyridine, which comprises the following steps: step 1, preparation of 2, 5-dichloropyridine nitrogen oxide: taking 2, 5-dichloropyridine as a raw material, reacting in the presence of a catalyst and acetic acid, and then filtering to remove the catalyst to obtain 2, 5-dichloropyridine nitrogen oxide; adding an acetic acid solution of 2, 5-dichloropyridine nitrogen oxide; step 2, nitration reaction: adding sulfuric acid and nitric acid, and reacting to obtain 2, 5-dichloro-4-nitropyridine nitrogen oxide; step 3, nitrogen and oxygen removal reaction: adding acetyl chloride to replace 4-position nitro to obtain 2, 4, 5-trichloropyridine nitrogen oxide, and then adding phosphorus trichloride to remove nitrogen and oxygen to obtain 2, 4, 5-trichloropyridine; and 4, chlorination and refining: adding Lewis acid into the 2, 4, 5-trichloropyridine, reacting to obtain a 2, 3, 4, 5-tetrachloropyridine crude product, and refining the crude product to obtain the finished product 2, 3, 4, 5-tetrachloropyridine. The invention solves the problems of more byproducts and unsatisfactory product purity and yield in the prior art.

The invention provides a preparation method of a lybula intermediate, which comprises the following steps of: selectively generating a compound II from a compound I under the action of an inducer, reacting the compound II with a compound III under the action of a halide and an alkali reagent, removing a protective agent to generate a compound IV, generating a compound V from the compound IV under the action of an oxidizing agent and a pro-oxygen agent, and purifying to obtain the lybula intermediate. And the obtained Leibolifera intermediate is high in yield and purity, and the content of nitrogen oxide impurities is low.

The application provides a method for preparing calcium thiocyanate by using desulfurization waste liquid, calcium nitrate and ammonium thiocyanate are respectively dissolved into 30-50% solution, the calcium nitrate solution is slowly dropped into the hot ammonium thiocyanate solution under the conditions of heating and stirring, under the heating state, the double decomposition reaction occurs to generate calcium thiocyanate and ammonium nitrate, with the continuous heating and the evaporation of water, the concentration of calcium thiocyanate gradually increases, the ammonium nitrate is heated and decomposed to generate nitrogen oxide and ammonia gas, the generated process gas rich in nitrogen oxide and ammonia gas is condensed and introduced into the coking ammonia removal and denitration section for treatment, and finally the evaporation and concentration obtain about 50% calcium thiocyanate product. The method uses industrial waste to provide raw materials, and the production cost is low; the process tail gas generated in the reaction only needs to be treated by the existing ammonia removal and denitration device of the coking enterprise, without increasing additional equipment, thereby saving the expenditure; and the method has environmental protection benefit, social benefit and economic benefit.

The present application is named inert carbon and its preparation method and application, which can be applied to the field of manufacturing smoke and fire agent (medicine) and initiating explosive, completely replaces black powder and solves the emission of harmful gases of sulfur dioxide and nitrogen oxides after combustion and explosion, and greatly improves the launching power, sensitivity, smoke and hygroscopicity. The carbon source is crushed to form carbon powder, and the water-soluble substances with strong hygroscopicity in the carbon powder are removed by water washing to form clean carbon powder. The high-purity carbon powder can also be prepared by boiling the carbon powder with strong acid or strong base and then washing with water. Then, the carbon powder, clean carbon powder, high-purity carbon powder or mixed carbon powder is subjected to three-dimensional penetration coating by using high-temperature or high-temperature pressure pentaerythritol aqueous solution, so as to become a truly high-energy fast-burning inert carbon. Subsequently, the surface of the inert carbon can be modified and coated by using organic matter such as stearic acid to reduce the friction sensitivity and impact sensitivity of the smoke and fire agent (medicine), so as to replace sulfur and ordinary carbon powder, and make it perfectly applied in the smoke and fire agent (medicine) and initiating explosive.

Provided are a compound for recovering a p53 mutation function and use thereof, particularly relating to a compound represented by Formula M, or an enantiomer, a diastereomer, a racemate, a tautomer, a stereoisomer, a geometric isomer, a crystal form, a nitrogen oxide, a metabolite or pharmaceutically acceptable salt, ester, solvate, hydrate, isotope-labeled compound or prodrug of the compound.

This invention relates to a method and system for measuring nitrogen oxide emissions from soil in the field using an extraction-absorption method, belonging to the field of environmental monitoring technology. A soil sampling unit is sealed and placed on the surface of the soil to be tested. Gas is extracted from the soil sampling unit by a power unit, causing outside air to replace the gas inside the soil sampling unit, forming an airflow flowing across the surface of the soil. The airflow is sequentially guided to a first absorption bottle, an oxidation bottle, and a second absorption bottle connected in series. The concentration of nitrite ions in the first and second absorption solutions is measured respectively. Based on the measured nitrite ion concentration, sampling flow rate, sampling time, and the area of ​​the soil covered by the soil sampling unit, the nitrogen oxide emission flux is calculated. This invention achieves stable, efficient, and low-cost offline quantitative measurement of nitrogen oxide emissions from soil in the field, providing reliable technical support for research on land-atmosphere exchange, soil nitrogen cycle, and atmospheric pollution source tracing.

The application relates to the fine chemical technology field and discloses a method for synthesizing an ultraviolet absorber through an alcohol reduction reaction, and the method steps are as follows: under the action of a MOF-derived copper-nickel-cerium trimetallic catalyst, an azo compound (I) or an intermediate nitroxide (II) is reacted with alcohol R-(OH) n A reduction reaction is generated by heating in a reaction kettle, and a benzotriazole compound (III) is prepared. The application utilizes the reduction characteristics of alcohol, adopts the MOF-derived copper-nickel-cerium trimetallic catalyst, combines the porosity and metal synergistic effect regulated by a structure directing agent, effectively improves the catalytic reduction efficiency and reaction selectivity, and the synthesis method has the advantages of no sewage, low cost, high safety and high yield.

The application discloses an egg white loaded nitro radical nitrogen oxide nanocomposite material and a preparation method and application thereof, and belongs to the technical field of material preparation. The nitro radical nitrogen oxide nanocomposite material is regular in shape, has an average particle size of 100nm-150nm, and has good dispersibility. The preparation method is as follows: chitosan and tetramethylpiperidine-nitrogen oxide are respectively dissolved in water and dichloromethane or dimethyl sulfoxide, the two are mixed after stirring and complete dissolution, dialysis is performed after reaction, the material is washed with ultrapure water, centrifuged, and dispersed in ultrapure water after dialysis. In addition, the egg white is loaded on the nitro radical nitrogen oxide nanocomposite material, so that the nanomaterial is endowed with immunogenicity. The material prepared by the method has a magnetic resonance imaging enhancement effect and potential as an immunoadjuvant.

The invention discloses a substituted heterocyclic compound and application of the substituted heterocyclic compound in medicines. Specifically, the invention relates to a compound shown in a general formula (I) or a stereoisomer, a tautomer, a nitrogen oxide, a hydrate, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug of the compound, and application of the compound as a drug, especially application of the compound in preparation of a drug for treating cancers.

The currently claimed invention relates to a method for improving the color fastness of a cellulose-based substrate to nitrogen oxides and ozone. The method comprises contacting the cellulose-based substrate with a composition comprising: at least one aminourea compound selected from bis[4-[3-(dimethylamino)ureo]phenyl]methane (I) and 4,4'-hexamethylenebis(1,1-dimethylaminourea) (II); at least one solvent selected from alcohols of formula A, glycol ethers of formula B, glycol ethers of formula C, polyethylene glycol, and water; R 1 -OH-A,R 2 -(OCH2CH2-) n OH-B,R 3 -(OCH2(CH3)CH-) m OH-C, where R 1 Selected from C2-C 10 Straight-chain or branched alkyl groups; R 2 Selected from C1-C6 straight-chain or branched alkyl groups; n is 1, 2 or 3; R 3 Selected from C1-C6 straight-chain or branched alkylene groups; and m is 1 or 2; wherein the cellulose-based substrate is selected from at least one of the following: dyed cellulose-based substrate, printed cellulose-based substrate, and dyed and printed cellulose-based substrate; and (ii) drying.

The application discloses a mineral adsorbent and a preparation method thereof. The prepared mineral adsorbent is composed of illite powder, zeolite powder, fly ash, coal gangue powder, dolomite powder and calcium carbonate. The preparation method comprises the following steps: S1, crushing illite, zeolite, coal gangue and dolomite to obtain illite powder, zeolite powder, coal gangue powder and dolomite powder; S2, putting the illite powder, zeolite powder, fly ash, coal gangue powder, dolomite powder and calcium carbonate into a mixer to wet grind to obtain mixed wet materials; and S3, putting the mixed wet materials into a calciner to calcine to obtain the powder-shaped mineral adsorbent. The application has a high removal rate for pollutants in waste gas, can effectively reduce the concentration of dioxin, particulate matter, nitrogen oxides, sulfur dioxide, carbon monoxide, mercury, cadmium, thallium and compounds thereof, antimony, arsenic, lead, chromium, copper, cobalt, manganese and nickel compounds in incineration waste gas.

The invention discloses a compound and application thereof. The compound is a compound as shown in a formula (I), or a stereoisomer, a tautomer, a nitrogen oxide, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug of the structure as shown in the formula (I). The invention also discloses application of the compound in preparation of medicines for treating ophthalmic diseases.

A method for producing ammonium nitrate includes a nitrogen dioxide recovery step of bringing nitrogen dioxide in a cement exhaust gas into contact with water to obtain an NOx-containing solution, a reduction reaction step of producing ammonia by bringing a reducing catalyst into contact with the NOx-containing solution, an ammonia recovery step of vaporizing the ammonia with a waste heat gas, a solid-liquid separation step of separating a residue after the ammonia recovery into iron hydroxide and an unused residue of NOx, a neutralization step of bringing the separated nitrate / nitrite nitrogen-containing solution and the NOx-containing solution into contact with the ammonia vaporized and recovered to prepare ammonium nitrate, and a catalyst production step in which magnetite used in the reduction reaction step is obtained by reacting iron sulfate with a sodium hydroxide aqueous solution and separating the mixture into solid and liquid, the sodium sulfate aqueous solution in the solid-liquid separation is separated into sodium hydroxide and sulfuric acid by electrodialysis, and the sodium hydroxide is used in a circulatory manner for preparing the magnetite, where the nitrogen dioxide in the cement exhaust gas is treated simply and efficiently while reducing environmental burden.

The application discloses a synthetic method of nitrogen-containing heterocyclic nitroxide, which comprises the following steps: S1, mixing and heating a nitrogen-containing heterocyclic compound with an alcohol-water mixed solvent; S2, adding an oxidizing agent after heating, and performing reaction under the condition that the pH is 6-9; S3, filtering after the reaction is completed, so as to obtain filtrate and filter residue; washing the obtained filter residue with dichloromethane, so as to obtain an aqueous phase and an organic phase; S4, collecting the filtrate and the aqueous phase, extracting the filtrate and the aqueous phase with dichloromethane for multiple times, combining the obtained organic phases, and removing the organic solvent through rotary evaporation, so as to obtain a nitrogen-containing heterocyclic nitroxide crude product.

The invention belongs to the technical field of stabilization of nitrate ester compounds, and particularly relates to application of poly (p-phenylenediamine) as a stabilizer for the nitrate ester compounds, and the addition amount of the poly (p-phenylenediamine) is 2.9%-3.1% on the basis of the total weight of the nitrate ester compounds. The preparation method of the poly (p-phenylenediamine) comprises the following steps: taking ammonium persulfate as an oxidizing agent, taking p-phenylenediamine as a monomer, adopting a spiral gas-solid two-phase flow technology, and enabling raw material solid particles to mutually rub and collide to initiate an oxidative polymerization reaction, so as to prepare the poly (p-phenylenediamine). The poly (p-phenylenediamine) has the characteristics of low price, easiness in synthesis, no toxicity, excellent nitrogen oxide absorption capacity and the like, has good compatibility with nitrate ester compounds, can effectively reduce the autocatalysis phenomenon and improve the long-term stability of the nitrate ester compounds, can avoid the toxicity problem of the traditional amine stabilizer when being used as the stabilizer, and has the advantages of low cost, low cost and the like. The environment and human health are facilitated.

The invention discloses a production process and device for preparing liquid nitrogen tetroxide by recycling nitric oxide. Nitrogen oxides in the tail gas are respectively absorbed by water and alkali liquor to prepare a nitric acid solution and a sodium nitrate-nitrous acid solution; a dilute nitric acid solution and a sodium nitrate and nitrite solution are respectively stored and then mixed to enter a nitric oxide generation tower for reaction to generate nitric oxide gas and a sodium nitrate aqueous solution. The nitric oxide gas is lightly oxidized by using oxygen in the nitric oxide generation tower, then enters the oxidation absorption tower and is heavily oxidized by using concentrated nitric acid, so that the nitric oxide gas is completely converted into nitrogen dioxide gas, and the concentrated nitric acid is used for absorption at the upper section of the oxidation absorption tower to form fuming nitric acid. Fuming nitric acid is heated by steam, and liquid nitrogen tetroxide is produced after condensation. The non-condensable gas contains a small amount of nitrogen oxides, and then passes through a denitration device. By adopting the device and the process, the nitrogen oxide in the recovered waste gas can be effectively ensured to be prepared into liquid nitrogen tetroxide, and the content of the nitrogen oxide in the waste gas outlet is reduced.

A method for extracting copper from sulphide mineral ore, comprising the following steps: stacking the ore to form a pile (heap), a leaching step, irrigating the pile with a first irrigating solution containing an acidic nitrate solution and nitrite, thereby causing the oxidation of sulfide minerals inside the pile, oxidation of gaseous nitrogen oxide released during the oxidation of sulfide minerals inside the pile with oxygen to form nitrogen dioxide, and hydrolysis of nitrogen dioxide to form nitric acid and / or nitrous acid in the first irrigating solution inside the pile, to continue the leaching stage and reduce nitrogen oxide losses from the pile.

The invention relates to the field of catalyst materials, in particular to a Pt-CeO2-TiO2 composite catalyst as well as a preparation method and application thereof. The catalyst comprises platinum nanoparticles homogeneously dispersed on a cerium oxide-titanium oxide mixed support, wherein the platinum nanoparticles are preferentially located at the interface of cerium oxide and titanium oxide. The molar ratio of cerium oxide to titanium oxide in the mixed carrier is (0.1: 1)-(10: 1), the platinum content is 0.01-5wt%, the specific surface area of the carrier is 50-500m / g, and the average particle size of platinum nanoparticles is 0.5-20nm. The preparation method comprises the steps of precursor solution preparation, catalyst precursor formation, heat treatment and the like. The catalyst is suitable for catalytic reactions such as carbon monoxide oxidation, nitrogen oxide reduction, volatile organic compound oxidation and water-gas shift, and has the characteristics of high activity and good stability.

Provided are: a method for producing a nitroxide having excellent safety without using a peroxide such as hydrogen peroxide; and a curable composition having excellent curing temperature, curing speed and wettability.　A nitroxide is generated without using a peroxide by simultaneously irradiating a reactive compound with atmospheric-pressure, low-temperature plasma and ultrasonic waves, and a curable composition having excellent curing temperature, curing rate, and wettability can be obtained by constituting the curable composition using the reactive compound containing the nitroxide.

The present invention relates to a high concentration nitric oxide generating device capable of raising the air pressure and generating a large amount of plasma containing high concentration nitric oxide even in the case of blowing straight wind into a discharge chamber to lightning discharge, and under the condition of delivering straight wind to the discharge chamber in an upwardly open state, the air pressure inside the discharge chamber is relatively raised compared to the atmospheric pressure, thereby enabling continuous generation of a large amount of plasma containing high concentration nitric oxide.