363 results about "Aromatization" patented technology

The invention provides a Pt-Sn bimetallic catalyst and a preparation method and application thereof.The preparation method comprises the steps that 1, a Y molecular sieve is placed in a mixed solution of KOH and methyl alcohol, centrifugation and washing are conducted till the Y molecular sieve is neutral after stirring, drying and roasting are conducted, and a non-acid KY molecular sieve is obtained; the silica-alumina ratio of the Y molecular sieve is 3-100; 2) taking the non-acidic KY molecular sieve as a carrier, and loading Sn by adopting an atomic layer deposition technology to obtain a Sn-modified non-acidic KY molecular sieve; and 3) loading Pt by using the Sn-modified non-acidic KY molecular sieve as a carrier and adopting an atomic layer deposition technology to obtain the Pt-Sn bimetallic catalyst. According to the preparation method provided by the invention, spatial distribution of Pt and Sn is accurately regulated and controlled by combining an atomic layer deposition technology, so that the electronic state of Pt species is adjusted, alkane is promoted to be dehydrogenated into an olefin intermediate, and the aromatization catalytic activity and the aromatic hydrocarbon selectivity of alkane are improved.

The invention provides a method for preparing alkane olefin by catalyzing microalgae pyrolysis through an alkali modified molecular sieve, and belongs to the field of biomass energy utilization. According to the method, the ZSM-5 molecular sieve raw powder is modified by adopting the alkaline solution, so that the pore structure of the ZSM-5 molecular sieve can be improved, the distribution of acidic sites can be optimized, the regulation and control of a microalgae pyrolytic reaction path can be realized under relatively mild conditions, the deoxidation reaction can be promoted, the content of oxygen-containing products can be reduced, and the generation of alkane olefin substances can be promoted; the aromatization reaction strength is reduced, and the selectivity of light hydrocarbons is improved, so that the content of alkanes and olefins in the pyrolysis bio-oil reaches 70% or above, and the quality of the pyrolysis bio-oil is remarkably improved. Results of the embodiment show that the pyrolysis bio-oil provided by the invention is subjected to gas chromatography-mass spectrometry detection, and the alkane-olefin peak area content is greater than 70%.

The invention relates to the field of organic chemistry, and particularly discloses a synthetic method of berberine hydrochloride. The synthesis method of berberine hydrochloride comprises the following steps: S1, carrying out reductive amination reaction on bromohomopiperony lamine and o-veratraldehyde to synthesize an intermediate II; s2, carrying out Suzuki coupling reaction on the intermediate II and an organic boron compound under the catalysis of a palladium metal organic matter to synthesize an intermediate III; s3, the intermediate III and organic chloride are subjected to an amino chlorination reaction, and an intermediate IV is synthesized; s4, carrying out intramolecular atom transfer radical addition and intramolecular Friedel-Crafts alkylation cascade reaction on the intermediate IV in a mixed solvent under the catalysis of a copper catalyst to synthesize an intermediate V; and S5, carrying out oxidative aromatization reaction on the intermediate V and iodine under the catalysis of alkali to synthesize berberine hydrochloride. The synthesis process is simpler, reaction conditions are easier to control, the yield is high, and the method is suitable for industrial production.

The invention discloses a high-performance thermosetting resin plugging material, a preparation method and a water-based drilling fluid, and relates to the technical field of oilfield chemistry, and the preparation method of the plugging material comprises the following steps: stirring an aromatic compound containing two double bonds with sodium tungstate, a transfer catalyst and a hydrogen peroxide solution at room temperature for reaction, and purifying to obtain an epoxy compound; the preparation method comprises the following steps: heating an aromatic compound containing an aldehyde group, ammonium formate and a palladium-carbon catalyst with nitrogen to react to obtain an amine compound, transferring the epoxy compound and the amine compound into a size-adjustable mold, carrying out heating curing treatment, carrying out low-temperature ball milling on a crude product to obtain plugging material particles, and preparing the water-based drilling fluid by using the plugging material particles. The specific aromatic rigid framework monomer is selected, and the molar ratio of epoxy to the curing agent is accurately controlled, so that the mechanical strength and thermal stability of the material are remarkably optimized, and the plugging material has a good treatment effect on cracks and pores in complex stratums.

An antifungal composition including a first essential oil, and a second essential oil, where the composition is configured to reduce disease onset, pathogen spread, or a combination thereof. Further, an antifungal compound including one or more aroma compounds selected from 4-(4-hydroxyphenyl)-2-butanone, furaneol, ethyl methylphenylglycidate, ethyl hexanoate, ethyl butanoate, beta-ionone, alpha-ionone, (R)-(+)-limonene, (S)-(-)-limonene, cis-3-Hexen-1-ol, nerol, linalool, 2-heptanone, alpha-terpineol, beta-damascenone, β-caryophyllene, ethyl 2-methylbutanoate, β-myrcene, gamma-octalactone, alpha-humulene, nerolidol, (E,E)-2,4-decadienal, (E,E)-α-farnesene, vanillin, phenylethyl acetate, citral, 3-methylbutan-1-ol, or a combination thereof.

To provide a compound useful as a material for an organic device such as an organic electroluminescent element.SOLUTION: Polycyclic aromatic compounds having a structure consisting of one or two or more structural unit (s) represented by the formula (1); (Ra1 to Ra3, Rb1 to Rb4, Rc1 to Rc4 are independently H or substituents; provided that at least one of Rc1 to Rc4 is a group represented by the formula (1-1); Y1 is B; and are independently> N-RNX; RNX is substituted / unsubstituted aryl; at least one of the aryl ring and the heteroaryl ring in the above structure may be fused with at least one cycloalkane, and H in the above structure may be replaced by D. X1 X2. ) SELECTED DRAWING: None

The invention discloses non-activation low-cost high-magnification asphalt-based porous carbon and a preparation method and application thereof.The preparation method comprises the steps that tar with high aromatic hydrocarbon content is subjected to a cross-linking oxidation reaction in an oxygen-containing atmosphere, and oxygen modified asphalt rich in hydroxyl and carboxyl polar functional groups is obtained; the preparation method comprises the following steps: jointly mixing oxygen modified asphalt, a soft template dispersant and a water-organic mixed solvent, and realizing uniform dispersion of the mixture in a mixed phase by utilizing the interaction of a polar functional group on the surface of the oxygen modified asphalt and the soft template dispersant; through a synergistic self-assembly reaction under a hydrothermal condition, core-shell structure micelles are formed by utilizing polarity gradient guidance of a mixed solvent, and precise regulation and control of the pore diameter are realized; after the reaction, carrying out solid-liquid separation, washing and drying to obtain a porous carbon precursor with a mesoporous framework; and performing low-temperature carbonization treatment on the porous carbon precursor in a protective atmosphere, and promoting low-temperature aromatization of asphalt molecules by using hydroxyl radicals introduced in a hydrothermal process to form the asphalt-based porous carbon with a pi-enriched conjugated structure.

The invention is directed to a process for the preparation of an aromatic acid or a phenolic compound, said process comprising reacting a dienophile and a furanic compound comprising an acetal moiety in a Diels-Alders reaction to obtain an aromatic compound comprising said acetal moiety, followed by hydrolysis and oxidation of said acetal moiety into a hydroxide or carboxylate moiety to form the aromatic acid or phenolic compound, wherein said dienophile is selected from the group consisting of alkylenes, acetylenes, acrylates, maleates, fumarates, maleimides, propiolates, acetylene dicarboxylates, and benzynes and wherein said acetal moiety is bound directly to the 2-position of the furanic compound.

This application proposes methods for synthesizing aromatic compounds using ionizing radiation based on N₂O, and methods for synthesizing aromatic compounds using industrial waste gas. The method includes: placing benzene and a combined gas containing N₂O in a sealed container, and adjusting the volume of the combined gas to bring the benzene in the sealed container to its saturated vapor pressure; irradiating the sealed container with radiation to cause the benzene to react and yield the aromatic compounds, wherein the radiation includes X-rays, gamma rays, or electron beams, the energy range of which is 0.0110 MeV, and the absorbed dose rate is 0.1 Gy / min to 1000 kGy / min. This method can synthesize aromatic compounds such as phenol in one step using ionizing radiation based on N₂O without the use of a catalyst, achieving precise and high-value utilization of N₂O.

The application provides a preparation method of high-stability nanoscale ZSM-5 catalyst and application thereof, and comprises the following steps: (1) preparing full-silicon molecular sieve silicalite-1 by a pre-crystallization method with a template agent, a silicon source and water as raw materials; (2) adopting a seed method, taking the full-silicon molecular sieve silicalite-1 as seed crystals, mixing the seed crystals with reaction raw materials including a template agent, a silicon source, an aluminum source and water, and then treating again by a pre-crystallization method, and then preparing ZSM-5 catalyst by crystallization, ammonia exchange and metal loading in sequence. The preparation method obtains high-stability light alkane aromatization ZSM-5 catalyst with secondary small particles of about 50 nm stacked together. The catalyst can maintain activity for a long time in the process of propane anaerobic aromatization reaction, has low surface carbon, high aromatic hydrocarbon selectivity and high propane conversion rate; and the synthesis method reduces the use of template agents, is green and environment-friendly, and has good application prospect in the field of propane aromatization catalyst preparation.

The invention discloses a low-carbon hydrocarbon / alcohol aromatization Zn / ZSM-5 catalyst as well as a preparation method and application thereof, and belongs to the technical field of aromatization catalysts. By adjusting the pH value of the zinc solution used in the preparation process of the Zn / ZSM-5 catalyst, the distribution and existence form of Zn species on the HZSM-5 molecular sieve can be effectively regulated and controlled, so that the dehydrogenation capability and aromatization selectivity of the Zn / ZSM-5 catalyst are remarkably improved. Meanwhile, by optimizing the existence state of the Zn species, the loss of the Zn species under the high-temperature reaction condition can be effectively reduced, and the service life of the catalyst is remarkably prolonged. In addition, the preparation method provided by the invention is simple in process, convenient to operate and suitable for large-scale industrial production, and has a wide application prospect.

This invention discloses a yam oxylipoic acid compound with aromatase inhibitory activity, its application, and analytical identification methods, belonging to the field of medicinal chemistry. The yam oxylipoic acid compound is (Z)-9-ethoxy-6,10-dihydroxyoctadec-7-enoic acid, a novel compound. This compound can significantly inhibit aromatase activity and possesses the ability to inhibit excessive estrogen production, thus showing promising application prospects and value in diseases related to estrogen imbalance regulation.

A fluidized bed device for coupling naphtha and methanol to prepare aromatics and co-produce olefins and its application method are provided. By using the device, under the action of a catalyst, naphtha reacts with methanol to generate product gas containing aromatics and light olefins as main components. The method can efficiently and selectively convert linear and branched aliphatic hydrocarbons into aromatics, while also increasing p-xylene production through aromatic methylation reactions, with the p-xylene content in the xylene mixture exceeding 75 wt %. The fluidized bed reactor achieves increased p-xylene production by controlling the progression of cascade reactions (naphtha→benzene / toluene→p-xylene). Additionally, it utilizes the methylation reaction of benzene / toluene with methanol to provide in-situ heat for the coupled naphtha-methanol aromatization process, thereby achieving autothermal balance.

This invention relates to a method for ultra-high sensitivity and specific naked-eye detection of trace aromatic compounds. The method utilizes the long afterglow induced by the specific interaction between the analyte and a matrix as the output signal to achieve naked-eye detection of the analyte. The aromatic compounds are aromatic pollutants and aromatic organic metabolites. This invention utilizes the organic long afterglow induced by mixing the analyte G with the host molecule H through methods such as heating and melting, solvent evaporation and crystallization, matrix adsorption, and paper chromatography as a monitoring signal to achieve ultra-high sensitivity and specific naked-eye detection of trace aromatic compounds. The afterglow induced by the analyte G is highly dependent on the type and content of the analyte and matrix, which gives this detection method extremely high sensitivity and selectivity. The method is simple to operate, rapid, visible to the naked eye, requires inexpensive and readily available materials, and provides stable results.

The present invention relates to oct-5-en-2-yl acetate, to the use thereof as an aroma chemical, to the use thereof to impart an aroma to a composition, and to a method for imparting an aroma to a composition. The present invention further relates to a mixture comprising oct-5-en-2-yl acetate and 2-octyl acetate, to the use of said mixture as an aroma chemical, to the use of said mixture to impart an aroma to a composition, and to a method for imparting an aroma to a composition. The present invention is also directed to the use of oct-5-en-2-yl acetate for boosting or modifying the aroma of 2-octyl acetate. The present invention is further directed to a composition comprising oct-5-en-2-yl acetate or the mixture of oct-5-en-2-yl acetate and 2-octyl acetate.

The invention discloses a method for preparing industrial hexane with ultralow benzene content through pre-hydrogenation. The method comprises the following steps: light naphtha, hydrogen and a hydrogenation catalyst are subjected to a hydrogenation reaction in a hydrogenation reactor for desulfurization and dearomatization, and a first mixture is obtained; feeding the first mixture into a gas-liquid separator to respectively obtain a liquid-phase product and a hydrogen-containing gas-phase product, and separating hydrogen from the gas-phase product through a circulating hydrogen compressor for recycling; and sequentially carrying out second rectification and third rectification on the liquid-phase product to obtain a heavy component substance, and adsorbing the heavy component substance through a molecular sieve. According to the method, by means of front hydrogenation reaction and rear molecular sieve adsorption, on one hand, the reaction load of molecular sieve adsorption is greatly reduced while the reaction activity of the hydrogenation reaction is improved; on the other hand, an extracting agent does not need to be added, other gas-phase and liquid-phase components are not introduced except hydrogen, the preparation process is greatly simplified, and the benzene content in the obtained cyclohexane is smaller than 5 ppm.

The present application relates to a kind of from androsta 1, 4-diene-3, 17-dione starting synthesis of estren and the method of a kind of compound thereof.Especially, the present application provides a kind of preparation method of estren shown in formula I, comprising the following steps: in inert solvent, androsta-1, 4-diene-3, 17-dione (II) with reagent R4VX carries out demethylation aromatization reaction step directly to obtain estren (I);Wherein, the definition of reaction substrate, reagent and reaction condition is as claimed in claim or specification.The method is simple in operation, and good in selectivity, and product purity is high, suitable for industrial production.

The application discloses a kind of surface chemical reconfiguration's sodium ion battery hard carbon negative electrode material and preparation method thereof.The method comprises the following steps: constructing organic precursor layer on the surface of carbon source matrix;Using acid dehydrating agent to induce the dehydration, crosslinking or aromatization reaction of precursor layer at 0-300 DEG C, to form stable surface solidification layer;Finally, high-temperature carbonization is obtained hard carbon material.The application utilizes acid-assisted solidification technology, significantly reduces the content of active oxygen-containing functional groups on the surface of hard carbon (XPS shows <5.0%), while maintaining the internal microporous sodium storage capacity, significantly improves the interface stability and the first coulomb efficiency of the material (can reach more than 95%).The process is simple, low in cost, and suitable for large-scale industrial production.

This disclosure relates to a single stage process for the direct conversion of alcohols, e.g. ethanol, to olefinic mixtures (C2-C7) with low levels of aromatics carried out in a single reactor with two fixed catalyst beds in series, or two catalytic fixed bed reactors in series wherein the first reactor operates at a lower or higher temperature than the operating temperature of the second reactor. The process transformation of ethanol is comprised of ethanol dehydration to ethylene and water in high yield with the first catalyst in the first reactor, or via the first fixed catalyst bed, followed by directly feeding the ethylene and water to the second reactor, or second fixed catalyst bed, with conversion of said ethylene and water to a C2-C7 olefinic mixture with the second catalyst(s) in high yields with minimal aromatic compound formation.

The invention relates to a biomass low-temperature carbonization accelerant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out water washing pretreatment on powder obtained by crushing a biomass raw material, and then carbonizing in an inert atmosphere to obtain biomass carbon powder; acidizing the biomass carbon powder to obtain carbon-based solid acid; the carbon-based solid acid and a transition metal salt auxiliary agent are mixed and ground, and the biomass low-temperature carbonization accelerant is prepared. The biomass low-temperature carbonization accelerant is a composite catalyst composed of carbon-based solid acid and transition metal salt; wherein the carbon-based solid acid is used as a main catalytic substrate, provides abundant Bronsted acid loci-SO3H, and is mainly used for catalyzing the dehydration reaction of biomass; transition metal ions are used as Lewis acid sites and generate a synergistic effect with the carbon-based solid acid to jointly catalyze depolymerization, dehydrogenation and aromatization reactions, so that deep carbonization can be initiated and completed at a relatively low temperature of 250-400 DEG C, and the carbonization rate is remarkably higher than that of an existing carbonization catalyst.

This invention discloses a compound, octanoic acid 4-methyl-5-thiazole ethyl mercaptan ester, with the specific chemical structure shown below: The aromatic compound is mainly used in food flavorings.

The present invention provides: hollow particles which enable a lower dielectric constant and a lower dielectric loss tangent of a resin composition and a production method therefor. The hollow particles of the present invention have a shell portion formed by a polymer of a monomer component including a divinyl aromatic compound and a monovinyl aromatic compound and a hollow portion surrounded by the shell portion, in which a dielectric loss tangent measured by cavity resonance method (frequency: 10 GHz (room temperature)) is 1.00×10−3 or less. The hollow particles can be produced by mixing the monomer component and a predetermined hydrophobic solvent, by further mixing water, by polymerizing the monomer component in an emulsion liquid obtained, and by washing a resulting polymer with water and an organic solvent.

The invention discloses a method for constructing a highly conjugated aromatic ring system from bio-based (Z)-3-hexene-2, 5-diketone, and the method comprises the following steps: preparing a 1, 3-dinitroalkane aromatic compound with high yield from a bio-based aldehyde substance in nitromethane through a nickel-based catalyst, and then carrying out ring opening on the 1, 3-dinitroalkane aromatic compound and electro-catalytic 2, 5-dimethylfuran to prepare the highly conjugated aromatic ring system from the bio-based (Z)-3-hexene-2, 5-diketone and the bio-based (Z)-3-hexene-2, 5-diketone. The high-conjugation biaromatic ring system is constructed through the reaction of 1, 5-diketone; the preparation method has the advantages that the yield is high, the greenization degree is high, and the obtained highly conjugated biaromatic ring system has high bio-based content (gt; 86%), and has a high application value.

The present application provides a kind of C5-C 10 Alkanes are converted into benzene and aviation kerosene-based aromatic hydrocarbons by a system and method, which includes an aromatization reaction device for high-temperature catalytic conversion of gaseous C5-C 10 alkane raw materials to obtain aromatic hydrocarbons, C1-C4 hydrocarbons and hydrogen; a gas-liquid separation device for cooling the gas output by the aromatization reaction device to cause gas-liquid phase separation, and separating benzene from the liquid phase; an alkylation reaction device for high-temperature treatment of the gas phase and liquid phase mixture output by the gas-liquid separation device to convert C2-C4 olefins and aromatic hydrocarbons into aviation kerosene-based aromatic hydrocarbons; and a gas separation device for separating the unreacted gas phase output by the alkylation reaction device to obtain dry gas, and inputting the remaining unreacted gas phase material into the aromatization reaction device for recycling. The system provided by the present application realizes the conversion of C5-C 10 alkanes to obtain a benzene yield of 60-70% and an aviation kerosene-based aromatic hydrocarbon yield of 20-25%, achieving simultaneous mass production of benzene and aviation kerosene-based aromatic hydrocarbons.

The invention relates to a eutectic material, a hydrate physical mixture as well as preparation and application thereof. The eutectic material comprises an electron donor and an electron acceptor, wherein the electron donor is a bidentate benzimidazole compound with V-type conformation, and the electron acceptor is an aromatic compound containing a strong electron withdrawing group. The material can be widely applied to the fields of multiple anti-counterfeit labels, visual temperature sensing, polar solvent recognizers, nitrobenzene toxic compound detection and the like, and has important practical application value.

The present invention discloses a method for preparing curved carbon nanobelts by removing HCl by Pd catalysis, wherein the structure of the curved carbon nanobelts is shown as follows: wherein R is hydrogen, C 1‑20 Alkyl, C 1‑20 Alkoxy, mesitylene, phenyl or its large π extension derivative, n is 1 or 3. The product prepared by the method of the present invention can be regarded as a sidewall fragment of a (m, m)-type carbon nanotube. The present invention uses a compound with a borate group and a compound with a halogen to undergo Suzuki-Miyaura cross-coupling reaction and reductive aromatization reaction to obtain a carbon nanocyclic compound, and then further undergoes a Suzuki-Miyaura cross-coupling reaction and Pd-catalyzed deHCl to obtain armchair-type carbon nanobelts of different sizes. The synthesis method of the present invention is unique, the structure is novel, it has good photophysical properties, and it has potential applications in bottom-up growth of single-walled carbon nanotubes.

The Invention relates to a method Method for making a ruthenium catalyst comprising the steps of - Providing an aromatic dithiol substituted on adjacent aromatic carbon atoms with thiol groups, wherein in a first step an aromatic compound substituted with two leaving groups on adjacent aromatic carbon atoms are reacted with alkali trithiocarbonate to obtain an aromatic benzodithiole-thione, which in a subsequent step is reacted / hydrolysed with a base; - providing a zinc dithiolate compound by reacting the aromatic dithiol with a zinc carboxylate in an organic solvent; Reacting the zinc dithiolate compound with a ruthenium compound wherein X1 and X2 are, independently of each other, are anionic ligands and are the same or different; L and L2 are, independently of each other, neutral electron donor ligands and are the same or different; Ar is an aromatic group which may be substituted and that can be bridged with L, if L is an alkoxy group; - Obtaining a ruthenium catalyst of formula 4 or 4a, wherein R1 to R4 are, independently of each other, are selected from hydrogen, halogen, alkyl, aryl, or R.1 with R3, R3 with R4 or R2 with R4 are forming together an aliphatic or aromatic ring.

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to 2-methyl-5-trifluoromethyl furan and a preparation method thereof. The preparation method comprises the following steps: adding a solvent into trifluoroacetone, adding alkali under an ice bath condition, adding 1-chloro-2-methyl ethylene oxide, reacting at room temperature, adding acid, reacting at 40-60 DEG C to complete a dehydration reaction, then adding alkali for aromatization, continuing to complete an aromatization reaction, adding water to extract a reaction system, taking an organic phase, filtering, washing and drying to obtain the 1-chloro-2-methyl ethylene oxide. And rectifying to obtain the 2-methyl-5-trifluoromethyl furan. According to the 2-methyl-5-trifluoromethyl furan and the preparation method thereof provided by the invention, the reaction conditions are mild, the steps are simple, and the prepared 2-methyl-5-trifluoromethyl furan is high in yield and suitable for industrial production.

The invention provides an isocyanate-participated cross-linking type polyaryl anion exchange membrane as well as a preparation method and application of the isocyanate-participated cross-linking type polyaryl anion exchange membrane. According to the invention, one or more aromatic compounds are used as a polymer monomer main chain and are condensed with an N-heterocyclic carbonyl compound under the catalytic action of superacid to obtain a polymer intermediate, a long-chain hydroxyl structure is introduced as a cross-linking reaction site, and a diisocyanate structure is added in the film forming process to complete cross-linking. The cross-linked polyaryl anion exchange membrane prepared by the preparation method has the advantages of excellent spatial size stability and membrane framework stability, relatively strong mechanical property, relatively strong oxidation reduction resistance, relatively strong swelling resistance, excellent corrosion resistance and relatively long service life; the isocyanate-participated cross-linked polyaryl anion exchange membrane disclosed by the invention has good application prospects and large-scale popularization potential in the field of liquid flow electricity.

The invention relates to a side-arm effect regulated chiral super-crosslinked polymer catalyst and a preparation method thereof, and aims to solve the problem of poor asymmetric catalytic activity caused by too strong rigidity of a super-crosslinked polymer skeleton prepared by taking an aromatic compound as a monomer. The preparation method comprises the following steps: 1, dissolving amine with a catalytic function, an aromatic derivative and a condensing agent in an organic solvent, and carrying out condensation reaction at the temperature of 35-40 DEG C to obtain a chiral super-crosslinking monomer; 2, mixing the chiral super-crosslinking monomer, a ferric trichloride catalyst, a crosslinking agent and a reaction solvent, and reacting at the temperature of 50-100 DEG C to obtain a chiral porous super-crosslinking polymer precursor; and 3, mixing and reacting the chiral porous super-crosslinked polymer precursor, organic alkali and a solvent. Diversified modification of flexible side arm groups in holes is realized by adjusting the structure of the cutting agent. The in-hole microenvironment is adjusted through side arm groups, the activity and catalytic characteristics of the catalyst are regulated and controlled, and the asymmetric catalytic activity and enantioselectivity are improved.