75 results about "Nitrogen" patented technology

The invention belongs to the field of biochar adsorbing materials, and relates to a method for preparing modified biochar with aquatic plant waste and hematite. The method includes the following steps: (1) naturally drying aquatic plants prior to crushing to obtain aquatic plant powder; (2) crushing the hematite to obtain hematite powder; (3) weighing the hematite powder prior to putting the hematite powder into deionized water, and performing ultrasonic treatment to obtain suspension; (4) weighing the aquatic plant powder, soaking the aquatic plant powder in the suspension, and stirring and drying to obtain fully mixed aquatic plant and hematite mixture; (5) weighing the fully mixed aquatic plant and hematite mixture, putting the mixture in a batch-type atmosphere furnace, and feeding nitrogen into the furnace; performing temperature programming to the target temperature, and maintaining final-temperature pyrolysis; after the pyrolysis process is finished, obtaining the target product, namely the modified biochar. The modified biochar has strong adsorbability in nitrate and phosphate, high in stability and reusable.

The invention discloses a molecular film type automotive nitrogen and oxygen separation device which comprises a turbocharger, a nitrogen and oxygen separator, a gas inlet valve, a gas outlet valve, a negative pressure pump and an electric control throttling valve. The turbocharger is driven by a turbine in an automobile turbocharger, so that the air is compressed to be conveyed to two paths of the nitrogen and oxygen separation device, the nitrogen and oxygen separation device can separate oxygen from the air, the air with high oxygen content is output, and the air is supplied to an engine for use through the gas outlet valve. The two paths of the nitrogen and oxygen separation device work alternately, when the temperature of the two paths of the nitrogen and oxygen separation device is too high to influence oxygen production efficiency, a main air inlet pipeline is opened to provide air normally by controlling the opening degree of the electric control throttling valve, and thus the phenomena of gas circuit plugging and engine stalling are avoided. According to the automotive nitrogen and oxygen separation device, the two branch paths work alternately, high concentration oxygen can be supplied to the engine continuously so that fuel can burn and act, and the burning utilization rate of the fuel is improved.

The invention provides a method for predicting the flammability upper limit volume percentage of a pure compound. The method can be used for predicting a mathematical model of the flammability upper limit volume percentage of the pure compound which is composed of 12 or less elements of hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, arsenic and the like and has the atom number of 25 or less (excluding hydrogen) with high accuracy. Wherein the model is obtained as a universal quantitative structure-property relationship model by determining an optimal model from a plurality of multiple linear regression models by means of a step-by-step selection method, and the model takes some of the various molecular descriptors as independent variables, takes flammability upper limit volume percent as a dependent variable, and takes the flammability upper limit volume percent as a dependent variable. The value of the molecular descriptor included in the model can be received and input in a short time, and the flammability upper limit volume percentage can be output, so that only the specific value of the molecular descriptor included in the model is known. And the flammability upper limit volume percentage of the compound purely formed by the molecule can be predicted for any molecule meeting the requirements of the invention.

Provided is a low-molecular compound or a salt thereof, or a solvate thereof which has the ability to activate Nrf2.The present invention provides a compound represented by the formula (1) or a salt thereof, or a solvate thereof, wherein Xa1 is CRa1 or N, Xa3 is CRa3 or N, Ra1, Ra2 and Ra3 are each independently selected from the group consisting of hydrogen, halogen and C1-C6 alkoxy, Xb1, Xb2 and Xb3 are each independently selected from the group consisting of CH2, O, NH, S and C═O, Y is C6-C10 aryl optionally having a substituent or 5- to 10-membered heteroaryl optionally having a substituent, and Z is C6-C10 aryl optionally having a substituent, 5- to 10-membered heteroaryl optionally having a substituent or C1-C6 alkyl optionally having a substituent.

The first aspect of the present application provides a nitrogen-rich condensed energetic compound, which has high nitrogen content, high energy density and various performance indexes superior to lead styphnate and DDNP; the second aspect of the present application provides a preparation method of the nitrogen-rich condensed energetic compound, which takes 3,5,6-trichloro-1,2,4-triazine as raw material, and obtains the energetic compound through two-step reactions of ammoniation and azidation, and has the advantages of simple operation, high reliability, high yield, good stability, suitability for large-scale production, easy availability of raw materials and low production cost.

Provided is a mathematical model that can predict, with high accuracy, the saturated liquid density of a pure compound at 298.15 K, said pure compound comprising 12 or less elements such as hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, and arsenic and having 25 or less atoms (excluding hydrogen). The model is a quantitative structure-property relation model and is obtained by solving an optimal model from a plurality of multiple linear regression models by a step-by-step selection method, and the model takes some molecule descriptors in various molecule descriptors as independent variables, takes saturated liquid density under 298.15 K as a dependent variable, and takes the saturated liquid density under 298.15 K as a dependent variable. The value of the molecule descriptor included in the input model can be received in a short time, and the saturated liquid density at 298.15 K can be output, so that the saturated liquid density at 298.15 K of a compound formed by the molecule singly can be predicted for any molecule meeting the requirements of the invention as long as the specific value of the molecule descriptor included in the model is known.

Disclosed is a reducing agent for synthesizing a nitrogen-containing compound, the reducing agent being composed of a metal complex that contains samarium and a multidentate ligand which is coordinated to samarium. The multidentate ligand has 4 to 8 coordinating atoms that are bonded to samarium, and the coordinating atoms are each independently an oxygen atom or a nitrogen atom.

The invention discloses a pre-transition metal compound containing nitrogen and phosphine as well as a preparation method and application of the pre-transition metal compound. The compound has a structure as shown in a formula (1). Wherein R1, R2 and R3 are each independently selected from a group consisting of H, a C1-20 alkyl group, a C1-20 alkoxy group and a halogen; r4 and R5 are each independently selected from a group consisting of H, a C1-4 hydrocarbyl group, a C6-12 aryl group, and a C7-16 aryl group substituted by a C1-4 hydrocarbyl group; mt is a group IVB metal element; m is equal to 1-3; r < 1 >, R < 2 >, R < 3 >, R < 4 > and R < 5 > are respectively and independently hydrogen, alkyl of C < 1-20 > or aryl of C < 6-30 >; e is O or S; x is an atom or group bonded to an Mt element, and X is at least one group selected from the group consisting of C1-10 hydrocarbon groups and halogens; and n is an integer and satisfies the valence of Mt bonding. The catalyst containing the compound has the advantages of high catalytic activity and low cost.

The invention relates to the technical field of gas production materials, and discloses preparation and application of a high-nitrogen energetic gas production material, triazole has high-energy and multi-nitrogen characteristics, nitryl compounds have high energy, and the combination of triazole and nitryl compounds enables the gas production material to have the characteristics of large gas production rate, low-temperature combustion, less harmful gas and the like; the molecular structure contains a large number of N-N, C-N and C = N bonds and has high enthalpy of formation, meanwhile, the content of C and H in the molecule is low, the density of the energetic material can be improved, the electronegativity of nitrogen and oxygen atoms in the structure is high, and the energetic material is a painful energetic material and has high safety in the using process; compared with similar gas production materials, the prepared gas production material has the advantages that the gas production rate is greatly increased, the amount of solid residues is greatly reduced, the added adhesive has no corrosivity, the prepared gas production material is good in fluidity, the external additive can play a role in slagging, and the residues are not prone to being sprayed out.

The invention discloses a nitrogen-containing spiro compound crystal form and a preparation method and application thereof. The invention provides a crystal form I of a nitrogen-containing spiro compound as shown in a formula A. The crystal form I of the nitrogen-containing spiro compound is radiated by Cu-K alpha, and an X-ray powder diffraction pattern expressed by a 2 theta angle has diffraction peaks at 5.67 + / -0.20 degrees, 11.37 + / -0.20 degrees, 16.69 + / -0.20 degrees, 17.32 + / -0.20 degrees and 19.73 + / -0.20 degrees. The invention provides a crystal form II of a nitrogen-containing spiro compound as shown in a formula A. The crystal form II is radiated by Cu-K alpha, and an X-ray powder diffraction pattern expressed by a 20 angle has diffraction peaks at the positions of 11.32 + / -0.20 degrees, 11.70 + / -0.20 degrees, 11.93 + / -0.20 degrees, 18.03 + / -0.20 degrees, 18.81 + / -0.20 degrees and 19.17 + / -0.20 degrees. The crystal form of the nitrogen-containing spiro compound has good stability and complement factor D inhibitory activity, has a good inhibitory effect on rabbit red blood cell hemolysis, and has high in-vivo exposure and high oral bioavailability.

The present application provides a method for preparing nitrogen-containing fused ring compounds with antitumor activity, which can efficiently obtain the target product under relatively mild reaction conditions, and compared with the original process, the yield is significantly improved and the material cost is significantly reduced, which facilitates the scale-up of the process.

The present disclosure relates to a reducing agent for synthesizing a nitrogen-containing compound, the reducing agent containing an electron supplying site and a proton accepting site that is bonded to the electron supplying site.

The application discloses a kind of nitrogen-rich oxygen three-component high-energy density materials and synthesis method thereof.By introducing high-energy or low-sense energetic anion and cation to regulate neutral compound performance is the most direct and effective way to alleviate the contradiction between energy and stability of energetic material,can fundamentally realize the dual promotion of energy and stability.Nitrogen-rich compound 4,5-diamino-3-aminomethyl-1,2,4-triazole is used as substrate,ionization reaction is carried out with perchloric acid,then hydroxylamine ion is introduced by intermolecular force,obtains nitrogen-rich oxygen three-component high-energy density material.The synthesis method has the characteristics of easy-to-obtain raw materials,operation is simple,high safety,high yield and the like.

This invention discloses crystals of nitrogen-containing spiro compounds, methods for producing the same, and uses thereof. This invention provides a type I crystal of a nitrogen-containing spiro compound represented by formula A, in which the powder X-ray diffraction pattern displayed at a 2θ angle using Cu-Kα rays has diffraction peaks at positions 5.67±0.20°, 11.37±0.20°, 16.69±0.20°, 17.32±0.20°, and 19.73±0.20°. This invention also provides a type II crystal of a nitrogen-containing spiro compound represented by formula A, in which the powder X-ray diffraction pattern displayed at a 2θ angle using Cu-Kα rays has diffraction peaks at positions 11.32±0.20°, 11.70±0.20°, 11.93±0.20°, 18.03±0.20°, 18.81±0.20°, and 19.17±0.20°. The nitrogen-containing spiro compound crystals of the present invention exhibit good stability and complement factor D inhibitory activity, good inhibitory effect against rabbit erythrocyte hemolysis, high in vivo exposure levels, and high oral bioavailability. JPEG2026513298000037.jpg5469

A polishing liquid containing abrasive grains, a first nitrogen-containing compound, a second nitrogen-containing compound, and water, the first nitrogen-containing compound including at least one selected from the group consisting of (I) a compound having an aromatic ring having 1 nitrogen atom in the ring and a hydroxyl group, (II) a compound having an aromatic ring having 1 nitrogen atom in the ring and a functional group containing a nitrogen atom, (III) a compound having a 6-membered ring having 2 nitrogen atoms in the ring, (IV) a compound having a benzene ring and a ring having a nitrogen atom in the ring, and (V) a compound having a benzene ring to which 2 or more functional groups containing a nitrogen atom are bonded, the second nitrogen-containing compound having an HLB value of 7 or more.

The invention discloses a method for measuring the content of nitrogen in coal, and relates to the technical field of chemical analysis, the method for measuring the content of nitrogen in coal comprises the following steps: preparing a coal sample; putting the coal sample into a pulse furnace of the measuring equipment, and carrying out high-current pulse heating treatment, so that the coal sample is decomposed to generate a mixture; the mixture is introduced into a conversion furnace of the measuring equipment for filtering treatment, and nitrogen is obtained; and introducing nitrogen into an inert gas thermal conductivity detector of the measuring equipment to obtain the percentage content of the nitrogen element. The method for determining the nitrogen content in the coal is easy to operate, rapid and accurate, does not need to use strong acid and strong alkali, does not pollute instruments, equipment and the environment, and can meet the detection requirements of the nitrogen content in the coal sample.

Disclosed are an orexin receptor antagonist and the use thereof. Specifically disclosed are a compound represented by formula (I), and a stereoisomer, tautomer, crystal form, pharmaceutically acceptable salt, hydrate, solvate or prodrug thereof. The compound is an orexin receptor antagonist, and can be used for preparing a drug for treating and / or preventing orexin-related diseases.

Disclosed are a nitrogen-containing compound and a preparation method therefor. Specifically, disclosed is a method for preparing a compound III, comprising the following steps: in the presence of a phosphoric acid anhydride-type condensing agent and an organic base, a compound II undergoing a condensation reaction with 2-aminoacetonitrile in an organic solvent, to obtain compound III. The preparation method for compound III disclosed in the present invention has one or more of the following advantages: good yield, low cost, low impurity residue, convenient post-processing, and suitability for industrial production.

1. A process for producing hydrogen from ammonia, comprising ammonia decomposition, in which ammonia is decomposed into hydrogen and nitrogen, wherein the ammonia decomposition is carried out in a series of decomposition steps (13, 36, 17, 20), a final decomposition stream (21) is obtained after the last decomposition step (20), the last ammonia decomposition step (20) is carried out adiabatically, and / or the final decomposition stream (21) is quenched by direct mixing with water or steam after the last decomposition step.

A process for the explosion-proof storage of nitrous oxide in the liquid phase in a container comprising filling the container with nitrous oxide and an inert component selected from nitrogen, oxygen, carbon dioxide, water, argon, helium, krypton, xenon and mixtures thereof, and keeping it at a temperature of 190 to 273 K, wherein (i) the container has in all three spatial directions an inner distance between two opposite interior walls of ≥10 cm, (ii) the concentration of the inert components comprises 2 to 20 wt.-% in total, based on the nitrous oxide in the liquid phase, and (iii) compounds selected from—gases having a flammable range with air at 293.15 K and 101.3 kPa abs,—liquids having a flash point of ≤366.15 K at 101.3 kPa abs, and—mixtures thereof are kept at 0 to 2 wt.-% in total, based on the nitrous oxide in the liquid phase.

The invention provides a nitrogen-containing compound, an intermediate, a composition and an organic electroluminescent device. The nitrogen-containing compound has a structure as shown in a formula I; the composition comprises a first component and a second component, the first component comprises a nitrogen-containing compound, and the second component comprises a compound with a structure shown in a formula II. The structure of the nitrogen-containing compound is designed, so that the nitrogen-containing compound is suitable for being used as a main body material of a phosphorescent light-emitting layer of the organic electroluminescent device, and the organic electroluminescent device has relatively low driving voltage, relatively high current efficiency and relatively long service life.

The present invention provides a method for producing a nitrogen-containing compound, which comprises a step for synthesizing a nitrogen-containing compound from nitrogen and a proton source in the presence of a nitrogen activation catalyst having a structure represented by any one of formulae (I-1)-(I-4). (In the formula, R1 to R5), n1, n2, m1, m2, m3, m4, and Z are as defined in the description. # imgabs0 #

The invention discloses a method and a mathematical model for high-precision prediction of solubility parameters of a pure compound which is composed of 12 or less elements of hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, arsenic and the like and has the atom number of 25 or less (excluding hydrogen). Wherein the model, as a universal quantitative structure-property relationship model, is obtained by determining an optimal model from a plurality of multiple linear regression models by means of a stepwise selection method, and the model takes some descriptors in various molecular descriptors as independent variables, takes solubility parameters as dependent variables, and takes the dissolvability parameters as dependent variables. The value of the molecule descriptor included in the model can be input in a short time and the solubility parameter can be output, so that the solubility parameter of a compound purely composed of the molecule can be predicted for any molecule as long as the specific value of the molecule descriptor included in the model is known.

To make effective use of ammonia and produce a nitrogen-containing compound at room temperature.SOLUTION: A target substance is dissolved in liquid ammonia to prepare a solvent 1. The solvent 1, in which the target substance is dissolved, is electrolyzed by electrolysis means to provide a nitrogen-containing compound.SELECTED DRAWING: Figure 1

Provided is a mathematical model with which it is possible to accurately predict the standard boiling point of a pure compound having 25 or less atoms (excluding hydrogen), said pure compound comprising 12 or less elements such as hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, and arsenic. Wherein the model, as a universal quantitative structure-property relationship model, is obtained by determining an optimal model from a plurality of multiple linear regression models by means of a stepwise selection method, and the model takes some of the various molecular descriptors as independent variables, takes a standard boiling point as a dependent variable, and takes the standard boiling point as a dependent variable; according to the present invention, the values of the molecule descriptors included in the model can be received and input in a short time and the standard boiling point can be output, so that the standard boiling point of the compound purely composed of the molecule can be predicted for any molecule satisfying the requirements of the present invention as long as the specific values of the molecule descriptors included in the model are known.

Silica particles includes a nitrogen-containing compound. The ratio of the integral C of a signal observed at a chemical shift of −50 ppm or more and −75 ppm or less in a 29Si solid-state nuclei magnetic resonance (NMR) spectrum of the silica particles, the 29Si solid-state NMR spectrum being obtained by cross polarization / magic angle spinning (CP / MAS), to the integral D of a signal observed at a chemical shift of −90 ppm or more and −120 ppm or less in the 29Si solid-state NMR spectrum, that is, C / D, is 0.10 or more and 0.75 or less. The amount X of the nitrogen-containing compound extracted from the silica particles with a mixed solution of ammonia and methanol is 0.1% by mass or more. The amount X of the nitrogen-containing compound extracted and the amount Y of the nitrogen-containing compound extracted from the silica particles with water satisfy Y / X<0.3.

Disclosed in the present invention are a nitrogen-containing heteroaryl compound, a preparation method therefor and the use thereof. The present invention specifically relates to a compound represented by formula (I) for treating cancer, and an isotope-labelled substance, enantiomer, diastereomer, atropisomer, solvate, prodrug or pharmaceutically acceptable salt thereof. The compound of the present invention has good inhibitory activity against WRN, and has good application prospects.

The invention provides a high-nitrogen compound DTTZ, and an ionic salt and a preparation method thereof. The structure of the DTTZ is shown as a formula I. The invention further provides a preparation method of the high-nitrogen compound DTTZ. The high nitrogen compound provided by the invention has the characteristics of high enthalpy of formation, good stability, low sensitivity and the like, can be used as a fuel component of a solid propellant, and has application potential in the aspect of high-safety and high-energy-density materials.

The invention belongs to the field of environmental chemistry, and particularly relates to a preparation method and application of a nitrogen-modified zero-valent iron composite material based on the molten salt effect, and the preparation method specifically comprises the steps that iron powder, ferroferric oxide and sodium amide are mixed and subjected to ball milling, and the nitrogen-modified zero-valent iron material is obtained. In the ball milling process, a NaOH-NaNH2 melting interface can be formed in the ball milling tank, so that in-situ formation of nitrogen modified zero-valent iron is promoted. The trichloroethylene removal capability of the nitrogen-modified zero-valent iron material obtained in the preparation process is remarkably enhanced. According to the method, the problem that the nitrogen-modified zero-valent iron is difficult to prepare is solved, and a technical foundation is laid for safe and efficient low-cost short-range macro preparation of the nitrogen-modified zero-valent iron. The method provided by the invention is simple and efficient in process, low in cost and environment-friendly, and can be widely applied to preparation of nitrogen-modified zero-valent iron.

The present application relates to methyl mercaptan waste gas treatment technical field, specifically to a kind of nitrogen-doped supported manganese layered double hydroxide and its preparation and application.The present application provides a kind of preparation method of nitrogen-doped supported manganese layered double hydroxide, comprising: layered double hydroxide is mixed with manganese salt in water ultrasonic to obtain mixed solution, then melamine and water are added in mixed solution again ultrasonic to obtain precursor, and the precursor is calcined to obtain nitrogen-doped supported manganese layered double hydroxide.Nitrogen-doped supported manganese layered double hydroxide has nitrogen and manganese double active sites, and has good ozone catalytic oxidation treatment effect on methyl mercaptan.