339 results about "Halogenation" patented technology

Hybrid catalysts for simultaneous dehalogenation and cracking of plastic derived oil include composite particles, where each of the composite particles includes red mud particles and Mordenite zeolite particles. A process includes contacting a plastic derived oil stream with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil stream comprises halogen-containing compounds, and contacting the plastic derived oil stream with the hybrid catalyst causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, where the hydrogen halides are adsorbed onto surfaces of the red mud particles. The FCC effluent has a concentration of the halogen-containing compounds less than the plastic derived oil stream. Contacting the plastic derived oil stream with the hybrid catalyst causes hydrocarbons in the plastic derived oil stream to undergo cracking reactions over the Mordenite zeolite particles to produce the FCC effluent.

Processes for decontaminating a plastic derived oil include contacting a plastic derived oil stream containing halogen-containing compounds with a decontamination catalyst at a reaction temperature of 350-450° C. to produce a decontaminated plastic derived oil and a used decontamination catalyst. The decontamination catalyst includes from 5-40 wt. % red mud particles, from 20-60 wt. % matrix material, and from 10-30 wt. % binder, per unit weight of the decontamination catalyst. Contacting the plastic derived oil stream with the decontamination catalyst at the reaction conditions causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, which further react with the red mud particles to produce metal halides on surfaces of the red mud particles. The decontaminated plastic derived oil has a concentration of the halogen-containing compounds less than a concentration of the halogen-containing compounds in the plastic derived oil stream.

A hybrid catalyst for simultaneous dehalogenation and cracking of plastic derived oil includes a plurality of composite particles, where each of the composite particles includes red mud particles and USY zeolite particles. A process for upgrading plastic derived oil includes contacting the plastic derived oil with the hybrid catalyst in an FCC reactor to produce an FCC effluent and a used hybrid catalyst. The plastic derived oil comprises halogen-containing compounds, and the contacting at reaction conditions causes halogen-containing compounds to react to form hydrocarbons and hydrogen halides, which are adsorbed onto surfaces of the red mud particles. The contacting at reaction conditions also causes hydrocarbons in the plastic derived oil to undergo cracking reactions to produce the FCC effluent. The FCC effluent may have a reduced concentration of the halogen-containing compounds. A system that includes the hybrid catalyst is also disclosed.

The invention belongs to the technical field of preparation of herbicides, and particularly relates to a preparation method of tralkoxydim. The preparation method comprises the following steps: carrying out ethylation reaction on 3-hydroxy-5-(2, 4, 6-trimethylphenyl)-2-propoximido-cyclohex-2-ene-1-ketone and halogenated ethane under an alkaline condition, so as to prepare tralkoxydim. According to the method, the use of ethoxyamine hydrochloride or ethoxyamine in the traditional process is innovatively avoided, the raw material cost is reduced, the ethylation reaction is carried out by using halogenated ethane, the reaction raw materials are cheap and easy to obtain, meanwhile, single sodium / potassium halide wastewater is produced, the wastewater treatment process is greatly simplified, meanwhile, the generation of carnallite wastewater and carnallite-containing solid waste is eliminated, and the method is suitable for industrial production. The method has the advantages of environmental protection, economy and simple process, and is suitable for industrial large-scale production.

Provided is a method for producing an organohalogen compound with which it is possible to produce an organohalogen compound with high selectivity and high yield. A method for producing an organohalogen compound, which comprises a halogenation step for obtaining an organohalogen compound (A) represented by formula (1) by halogenating a compound represented by formula (1 [alpha]) as a starting material, the halogenation step being a step for halogenating in a multiphase-containing system, the plurality of phases include an organic phase containing an organic solvent as a solvent and an aqueous phase containing water as a solvent.

The invention provides a surface-modified perovskite nanocrystal and a preparation method and application thereof, and the surface-modified perovskite nanocrystal comprises: a perovskite nanocrystal having a chemical composition of ABX3; wherein A is selected from at least one of Cs < + >, CH3NH3 < + > and HC (NH2) 2 < + >; b is selected from at least one of Pb < 2 + >, Sn < 2 + >, Ge < 2 + > and Mn < 2 + >; x is selected from halogen anions; the surface of the perovskite nanocrystal is coated with an organic ligand layer; the organic ligand comprises a halogenated organic ligand. In the surface modified perovskite nanocrystal, the surface of the perovskite nanocrystal is coated with the organic ligand layer, so that surface defects can be effectively passivated at the same time, and the surface integrity and the crystallization quality of the nanocrystal are remarkably improved. And due to the surface consistency, the defect state density is reduced, and the exciton and phonon coupling coefficient is reduced, so that a non-radiative composite channel is remarkably inhibited, and the optical performance of the perovskite nanocrystal is remarkably improved.

This invention belongs to the field of two-dimensional material preparation technology, and provides an MXene material and its preparation method. The preparation method of the MXene material includes: mixing a MAX phase precursor to be etched with an organic halide reagent and a morphology modifier, performing a solvothermal etching reaction, and after the reaction, washing and drying the resulting product to obtain the MXene material; wherein the organic halide reagent is triethylamine trihydrofluoride, triethylamine hydrochloride, or dichloroethylamine hydrochloride, and the morphology modifier is ethylene glycol, dimethyl sulfoxide, or cyclohexane. The method of this invention can effectively control the microstructure and pore structure of the MXene material.

A method for manufacturing a perovskite quantum dot composite material that easily forms core-shell particles through a one-stage synthesis step is provided, along with the perovskite quantum dot composite material and an ink containing the perovskite quantum dot composite material. This perovskite quantum dot composite material suppresses surface defects of the perovskite quantum dots by forming an ionic crystal layer comprising halides in the shell layer and exhibits a very high PLQY (Power Level Quality). The perovskite quantum dot composite material comprises core particles and a shell layer surrounding the core particles. The core particles are composed of metal halide perovskites, and the shell layer comprises an organic halide compound with an ionic crystal structure having the same halogen composition as the core particles. The PLQY is greater than 75%, and the change in emission wavelength is less than 5 nm over a period of 10,000 minutes at room temperature.

The present invention relates to a composite material, wherein the composite material comprises porous carbon and cerium nitrohalide within the porous carbon. In addition, the present invention relates to a method for preparing the composite material, comprising: enabling a haloalkylated resin to react with a nitrogen-containing organic compound to obtain a nitrogen-modified halogen-containing resin; optionally, washing the nitrogen-modified halogen-containing resin by means of a halide salt solution; and mixing the nitrogen-modified halogen-containing resin with a cerium precursor, and then calcining the mixture in an inert gas atmosphere to obtain the composite material. When such a cerium-carbon porous composite material is used as a catalyst in a transesterification reaction, the conversion rate of the reaction can be significantly improved.

The invention relates to a process for preparing 1,2′-benzisothiazoline-3-one according to formula (I), comprising the following steps: (a) reacting a 2-halogenbenzonitrile compound of general formula (II) with a reaction mixture, containing: (i) alkaline sulphide and / or alkaline hydrogen sulphide and (ii) an alkyl halide compound, represented by general formula (III): R1X (III) for producing an intermediate product of general formula (IV), and (b) reacting the intermediate product of general formula (V) obtained in step (a) with a halogenating agent or an oxidant and subsequent reaction of the 2-(alkylsulfoxy)benzonitrile with an acid to form 1,2-benzisothiazoline-3-one as well as a halide compound of general formula (V) R1X (V).

The invention belongs to the technical field of adsorption material preparation, and relates to an anion defect type prussian blue analogue and a preparation method and application thereof in cesium adsorption.The preparation method comprises the steps that imidazole and halogenated alkane are subjected to an alkylation reaction and anion exchange to prepare ionic liquid, and after water is added, an ionic liquid-water mixed solvent is obtained; the method comprises the following steps: respectively dissolving transition metal nitrate and potassium ferrocyanide into an ionic liquid-water mixed solvent, dropwise adding a potassium ferrocyanide solution into a transition metal nitrate solution, and stirring to obtain a mixed solution; and carrying out hydrothermal reaction on the mixed solution, cooling to room temperature, washing the material, and drying to obtain the anion defect type prussian blue analogue. The cesium ion adsorption capacity and the cesium ion cycling stability are improved by precisely regulating and controlling anion defects in the Prussian blue analogue, and the cesium ion adsorption material has good ion interference resistance in a complex water environment and shows excellent adsorption selectivity and a wide application range.

A method of forming a metal phosphide film on a substrate using a cyclical deposition process includes contacting the substrate with a vapor-phase metal precursor, contacting the substrate with a vapor-phase halogenating agent, and contacting the substrate with a vapor-phase phosphorus-containing precursor. A method of filling a gap includes placing a substrate in a reaction chamber, wherein the substrate comprises a gap; forming a flowable metal halide on the substrate to fill the gap; and converting the flowable metal halide into a metal phosphide.

This invention discloses a method for the biosynthesis and application of fluorinated phenazine and its derivatives, belonging to the field of bioengineering technology. The invention aims to provide a method for synthesizing fluorinated phenazine and its derivatives. Specifically, it provides an in vitro enzyme cascade catalytic reaction method for synthesizing fluorinated phenazine and its derivatives, in which halogenated methyltransferase HMT1 and O-methyltransferase LaphzM, or halogenated methyltransferase HMT1 and N-methyltransferase PhzM, are added to a reaction buffer containing 1-hydroxyphenazine and its derivatives to obtain fluorinated phenazine and its derivatives. The enzyme concentrations of halogenated methyltransferase HMT1 and O-methyltransferase LaphzM are 2:1; the enzyme concentrations of halogenated methyltransferase HMT1 and N-methyltransferase PhzM are 2:1. This establishes a pathway for the synthesis of fluorinated phenazine from 1-hydroxyphenazine and its derivatives, providing a new approach for the biosynthesis of fluorinated phenazine.

This invention relates to the field of catalysts, specifically to a polyethylene catalyst and its preparation method, as well as ultra-high molecular weight polyethylene and its preparation method. The method includes the following steps: (1) under diluent conditions, a magnesium halide precursor, an alcohol compound, and a first internal electron donor undergo a first contact reaction to obtain a first reaction solution; (2) a second internal electron donor is added to the first reaction solution to undergo a second contact reaction to obtain a second reaction solution; (3) a titanium precursor is added to the second reaction solution to undergo a third contact reaction to obtain a third reaction solution; (4) a haloalkane is added to the third reaction solution, followed by a third internal electron donor to undergo a fourth contact reaction. The catalyst prepared by this invention exhibits good catalytic performance.

The application provides a preparation method of a PARP1 inhibitor intermediate, which comprises the following steps: after 6-hydroxy nicotinic acid is reacted with nitric acid, an intermediate shown in formula I is prepared through halogenation reaction, esterification reaction, hydrolysis reaction and the like. The method has low synthesis cost and high product yield, provides a new advantageous process route for synthesis of the PARP1 inhibitor, and has industrialized popularization and application prospects.

The invention discloses a preparation method of an intermediate of macloxvir. The preparation method comprises the following steps: step 1, carrying out halogenation reaction; step 2, elimination reaction; step 3, addition reaction; step 4, ring closing reaction; the starting raw materials, the solvent and the catalyst selected in the invention are industrial-grade cheap and easily available products, have the advantage of low production raw material cost, and provide economic feasibility support for industrial large-scale production; reaction conditions of each step in the reaction process are mild, byproducts are few, the yield is high, and a target product can be prepared more efficiently; meanwhile, the synthesis route is high in atom utilization rate and excellent in atom economy, the used solvent and reagent are high in stability and easy to recycle and reuse, generation and emission of industrial three wastes are greatly reduced, the environment-friendly treatment cost is reduced, and the concept of green chemistry and sustainable development is met; the method gives consideration to economy, high efficiency and environmental friendliness, and solves the problems of low yield, violent reaction conditions and high cost of raw materials and auxiliary materials in the existing method.

A process comprising: contacting a cobalt salt comprising one or more cobalt halides or cobalt esters with a reducing metal and a coordination compound under conditions to produce a tetracarbonyl cobalt salt of the reducing metal, optionally in the presence of an inert solvent and carbon monoxide; b) contacting a cobalt tetracarbonyl salt of a reducing metal with a porphyrin metal halide in the presence of a coordination compound, optionally in the presence of an inert solvent, under conditions to produce a complex comprising a porphyrin metal cation wherein the coordination compound is coordinated to the metal and an anion containing cobalt tetracarbonyl.

A method for conversion of a composition containing HCFO-1233zd(Z) and HCFC-244fa to form HCFO-1233zd(E) by reacting a mixture including HCFO-1233zd(Z) and HCFC-244fa in a vapor phase in the presence of a catalyst to simultaneously isomerize HCFO-1233zd(Z) to form HCFO-1233zd(E) and dehydrohalogenate HCFC-244fa to form HCFO-1233zd(E). The catalyst may be a chromium-based catalyst such as chromium trifluoride, chromium oxyfluoride, or chromium oxide, for example.

The present invention relates to a catalyst for propylene polymerization, a catalyst system for propylene polymerization and preparation and use thereof. The catalyst for propylene polymerization comprises: an activated magnesium halide, a titanium compound supported on the activated magnesium halide containing at least one Ti-halogen bond, and an internal electron donor compound selected from one or more of compounds having a structure of below Formula (1), wherein R1 and R6 are each independently selected from a C1-C12 straight or branched alkyl, a C3-C15 cycloalkyl or aryl, and R′ is H, a C1-C5 straight or branched alkyl, or phenyl; R2, R3, R4, and R5 are each independently selected from H, halogen, a C1-C12 straight or branched alkyl, a C3-C8 cycloalkyl, a C6-C15 aryl, or arylalkyl. The present invention can provide a catalyst showing high polymerization reaction activity and excellent stereospecificity, by applying a novel type of internal electron donor.

The invention discloses a near-infrared ratio type fluorescent probe for rapidly and reversibly detecting histamine (HA), a preparation method of the fluorescent probe and application of the fluorescent probe in dynamic cell imaging, and belongs to the technical field of fluorescence imaging and biosensing. The preparation method comprises the following specific steps: synthesizing aza-BODIPY molecules (1a-1d, 2a-2d) with different halogenations, and meanwhile, connecting the aza-BODIPY molecules with hydroxyl groups at 3 and 5 sites with a hydrophilic PEG (Polyethylene Glycol) fragment and halogen to obtain an HA probe HAPCyto with good water solubility; in addition, the hydroxyl aza-BODIPY molecules are continuously subjected to substitution, halogenation and hydrolysis reaction to obtain carboxyl-containing aza-BODIPY molecules, then the aza-BODIPY molecules are subjected to amidation reaction by utilizing the site, and different organic fragments are respectively connected to obtain a cell membrane targeted HA probe HAPPM, a golgi apparatus targeted HA probe HAPGA and a HaloTag HA fluorescent probe HAPHaloTag. When HA exists in a solution, the developed probe can realize rapid reversible detection of the near-infrared ratio of histamine, also shows good reversible property in mast cells, and can realize dynamic monitoring of histamine in cells.

The invention belongs to the technical field of organic synthetic chemistry, and discloses a method for efficiently synthesizing methyl 2-chloro-3-oxovalerate. According to the method, high-selectivity chlorination is performed on a beta-site C-H bond of methyl 3-oxovalerate under a mild condition by taking sodium chloride as a chlorine source and adopting a dual-catalysis system consisting of engineered halogenase and a visible light-sensitive catalyst under visible light irradiation. The engineered halogenase is a HalB triple mutant, and the affinity and regioselectivity of a substrate are remarkably improved; the photosensitive catalyst is a ruthenium bipyridine complex and synergistically drives generation of chlorine free radicals. According to the invention, a brand new biological-photochemical synergistic catalysis platform is constructed by organically combining the substrate recognition capability of the engineered halogenase and an electron transfer mechanism driven by visible light catalysis, so that the contradiction among selectivity, mildness and atomic efficiency of a traditional chlorination method is solved; and the method can be expanded to precise synthesis of other beta-functionalized ketone ester compounds.

The invention belongs to the field of perovskite devices, and particularly discloses a bromine-chlorine mixed blue-light perovskite thin film, a preparation method and a perovskite LED device. The bromine-chlorine mixed blue-light perovskite thin film is prepared from the following raw materials: cesium halide, lead bromide, lead chloride and alkaline earth metal bromide; the alkaline earth metal bromide comprises at least one of calcium bromide, strontium bromide and barium bromide; the ratio of the mole number of the alkaline earth metal bromide to the total mole number of Pb in lead bromide and lead chloride is not greater than 0.5. The bromine and chlorine mixed blue light perovskite is doped by adopting the alkaline earth metal bromide with a low-solubility perovskite phase, and the molar ratio of the doping amount of the alkaline earth metal bromide is not higher than 0.5, so that the nonuniform bromine and chlorine distribution of the blue light perovskite thin film in the film forming process is improved, the halogen separation under an electric field is inhibited, and the spectral stability is improved; by directly doping in the precursor, the preparation process is simple, and the method is suitable for large-scale industrial production.

The present application relates to solid waste resource application field, especially in a kind of preparation method of morphology controllable cerium-containing lanthanum solid waste-based composite material and its application in halogenated VOCs degradation.The preparation method includes the following steps: rare earth polishing powder is obtained by acid leaching leaching liquor;Leaching liquor is mixed with oxalic acid and precipitated, and the obtained precipitate is dried, calcined, to obtain morphology controllable lanthanum cerium oxide;Lanthanum cerium oxide is mixed with silicon source, aluminum source, template agent, etc., by hydrothermal reaction, centrifugal, drying, calcination and ion exchange, to obtain composite catalyst.The present application uses "leaching-morphology control-zeolite loading" synergistic strategy, successfully prepares a kind of composite catalyst with waste rare earth polishing powder as raw material, with lanthanum cerium co-leaching and morphology controllable characteristics.The method not only realizes the high-value resource utilization of waste rare earth polishing powder, but also shows excellent catalytic performance in the degradation of dichloromethane reaction, and shows good application prospect in VOCs pollution control field.

The present application relates to the technical field of synthesis of nitrogen-containing heterocyclic compounds, and particularly relates to a continuous flow synthesis method of nitrogen-containing heterocyclic acetic acid; specifically, nitrogen-containing heterocyclic compounds, halogenated acetic acid ester and inorganic acid binding agent are mixed in an aprotic solvent, and then are introduced into a microchannel of an ultrasonic microchannel continuous flow reactor to perform a substitution reaction under ultrasonic cavitation; after the reaction, the reaction liquid is collected and post-treated to obtain a nitrogen-containing heterocyclic acetic acid ester intermediate; the nitrogen-containing heterocyclic acetic acid ester intermediate is introduced into a second microreactor using an inorganic lye to perform a hydrolysis reaction, and after the reaction, the reaction liquid is collected and post-treated to obtain the nitrogen-containing heterocyclic acetic acid; the present application realizes continuous flow reaction of a heterogeneous system by using emulsification and ultrasonic technology, and can be used for the next step of continuous flow hydrolysis reaction after simple filtration and separation; the present application has high yield of two-step reaction, simple separation, short reaction time, and is suitable for large-scale industrial production.

This invention relates to a method for preparing perovskite thin films, comprising the following steps: forming at least one metal halide layer on the surface of a substrate by vapor deposition; spraying a precursor solution containing an organic ammonium salt onto the metal halide layer using ultrasonic spraying technology to form a wet film; and annealing the wet film to form a perovskite layer. This invention combines two processes with different physical mechanisms—high-vacuum vapor deposition and ultrasonic solution spraying—and achieves complementary advantages through a step-by-step strategy of "vapor deposition of an inorganic framework + spraying of organic components." This allows for easy control of film thickness and performance, making it suitable for preparing perovskite optoelectronic devices with different requirements.

This invention discloses a USP1 inhibitor intermediate and its preparation method, comprising the following steps: compound I reacts with compound II or II' to obtain compound III or III'; compound III or III' is catalytically reduced to obtain compound IV; compound IV is reacted under acidic conditions to generate compound V; compound V undergoes condensation and cyclization to obtain compound VI; compound VI reacts with compound XIV under alkaline conditions to obtain compound VII; compound VII is hydrolyzed to obtain compound VIII; compound VIII is condensed with trifluoroacetic anhydride to obtain compound IX; compound IX reacts with an amination agent to obtain compound X; compound X is dehydrated to generate compound XI; compound XI undergoes a reduction reaction to obtain compound XII; and compound XII undergoes a halogenation reaction to obtain the USP1 inhibitor intermediate (compound XIII). This route is mild, simple to operate, and has a high overall yield. Furthermore, the process is stable with few byproducts, and post-processing does not require column chromatography, making it suitable for industrial production.

The invention relates to the field of fine chemical materials, and realizes a low-cost and high-efficiency preparation method of 1, 3-dihydroxyacetone by taking acetone as a raw material through two steps of halogenation reaction and alkali substitution reaction for the first time. The whole process is simple to operate, green and environment-friendly.

The invention relates to stabilized chlorinated polyvinyl chloride (CPVC) polymer formulations, and the stabilizers used therein. The stabilization is achieved through the use of a sulfide containing organotin species in conjunction with co-stabilizers and organic extenders which provide increased thermal stability relative to traditional organotin stabilizers.