501 results about "Aromatization" patented technology

The invention relates to a manufacturing method of high-density aviation fuel, in particular to an aviation fuel mixture based on monoterpenoids and a preparation method of the aviation fuel mixture. Comprising monoterpenoids, polyhydric alcohols and a catalyst which serve as raw materials, and the mass ratio of the raw materials to the polyhydric alcohols is 1: 1. The conversion rate is high, the treatment steps are reduced, the thermal stability and combustion gravimetric heat of the product are improved, and the method is suitable for preparing aviation fuel with high density, low viscosity and low-temperature performance; cyclization and hydrogenation are carried out through a one-pot method, a reaction container does not need to be transferred, and the operation is simple; according to the polyol solvent system, cyclization of the monoterpenoids becomes easier due to participation of polyol, and the conversion rate is increased; according to the dual-catalyst system, a combination of an acidic catalyst and a heterogeneous hydrogenation catalyst is used in a reaction container, so that efficient dehydration and hydrogenation reactions are ensured; the aromatic compound content in the fuel can be controlled by adjusting hydrogenation conditions.

The invention discloses a method for preparing fuel from waste polyolefin through noble-metal-free low-temperature aromatization, which comprises the following steps: in the atmosphere of synthesis gas, carrying out catalytic cracking on polyolefin serving as a raw material by adopting a binary mixed catalytic system to obtain aromatic hydrocarbon; the binary mixed catalytic system comprises Zr-ZnO and a molecular sieve; the catalytic cracking temperature is less than or equal to 300 DEG C. According to the low-temperature aromatization method disclosed by the invention, methanol is generated in situ through the synthesis gas, and the methanol and olefin generated by polyolefin cracking are subjected to Prins reaction, so that the aromatization reaction can be realized at the pyrolysis temperature far lower than that in the prior art, precious metals are not needed, the additional value and the application range of a plastic recovery product are greatly enhanced, and the method is suitable for industrial production. And the cost of the recovery process is reduced.

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 an auxiliary cross-linking type polyarylpyridine anion exchange membrane as well as a preparation method and application thereof, and the preparation method of the auxiliary cross-linking type polyarylpyridine anion exchange membrane comprises the following steps: condensing one or more aromatic compounds and 4-acetylpyridine to obtain a polymer intermediate; a halogenated alkenyl compound is introduced as a cross-linking agent in the quaternization process, and an auxiliary cross-linking agent is additionally added in the film scraping process. The participation of the auxiliary cross-linking agent can make up the defect of low cross-linking degree in the alkenyl free radical reaction process, and is beneficial to the construction of a two-dimensional membrane structure with stable cross-linking degree. The auxiliary crosslinking type polyarylpyridine anion exchange membrane disclosed by the invention has relatively strong mechanical property, excellent membrane framework stability, relatively strong chemical stability, relatively strong swelling resistance and relatively long service life; the auxiliary crosslinking type polyarylpyridine anion exchange membrane disclosed by the invention has good application prospects and large-scale popularization potential in the field of flow batteries.

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 provides a method for preparing n-propylbenzene by taking n-nonane as a raw material, and relates to the technical field of organic synthesis. The method comprises the following steps: carrying out aromatization reaction on gaseous n-nonane under the action of a catalyst to obtain n-propylbenzene; the catalyst comprises a molecular sieve and metal components loaded in a molecular sieve crystal, the metal components comprise a main metal and an auxiliary metal, the main metal comprises one or more of Pd, Pt and Rh, the auxiliary metal comprises one or more of Ag, Sn, Re and Zn, and the main metal and the auxiliary metal form an alloy sub-nanocluster. According to the method, high-selectivity preparation of the n-propylbenzene is realized by utilizing the low-price n-nonane, so that the low-value n-nonane is converted into the high-value n-propylbenzene in a high-selectivity manner, and a new way is opened up for efficient preparation of the n-propylbenzene. Results of the embodiment show that by adopting the method for preparing the n-propylbenzene, the conversion rate of the n-nonane is more than 80%, and the selectivity of the n-propylbenzene is more than 75%.

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.

The invention relates to an open-shell aromatized free radical compound as well as a preparation method and application thereof, and belongs to the technical field of organic free radical compounds. The technical problems of multiple synthesis steps, complex process, high difficulty, poor stability, difficulty in regulation and control and the like of the organic free radical compound in the prior art are solved. The chemical structural formula of the open-shell aromatized free radical compound is shown as a formula (I). The open-shell aromatized free radical compound has the potential of preparing a lithium battery positive electrode, an organic electron spinning device and a photothermal conversion material. The invention provides a preparation method of a lithium ion battery pole piece containing the open-shell aromatized free radical material.

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 a method for improving the flavor of mulberry wine by screening aroma-producing yeast from mulberries. The method relates to the technical field of microorganisms and solves the problem that the existing mulberry wine preparation process cannot fully reflect the nutritional value and unique flavor of mulberries. Low-temperature treatment is used to increase the relative abundance of target bacterial genera in a sample, and a sample with a high relative abundance of desired bacterial species and a low fungal count is selected. Then, a specific screening method is adopted to separate and molecularly identify the aroma-producing yeast. Yeast with good tolerance and the ability to produce a strong aroma is selected from the sample through tolerance experiments and electronic nose analysis, and the yeast is compounded into a starter. The alcohol content of the obtained mulberry wine is increased by more than 2.2% vol to 13.5% vol, the total ester is increased by 25%, and the relative content of aromatic compounds such as aldehydes and ketones is increased. The aroma-producing yeast species are obtained through directional separation, which can avoid blindness, improve screening efficiency, and enhance the flavor of the fruit wine.

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.

Described herein are compositions comprising a lanthanide (III) modified fatty acid and methods of treating cancer with the composition. In particular, the application includes a lanthanide (III) modified fatty acid is a 9-R′, 10-R″ tri octadecanoate compound. This lanthanide (III) modified fatty acid can be combined with additional therapeutic agents, such as chemotherapeutic agents, radiopharmaceuticals, hormone therapies, CDK inhibitors, epigenetic modulators, selective estrogen receptor modulators, selective estrogen receptor degraders, aromatase inhibitors, phosphatidyl inositol-3-posphate kinase inhibitors, ATP-adenosine axis-targeting agents, signal transduction inhibitors, RAS signaling inhibitors, PI3K inhibitors, arginase inhibitors, HIF inhibitors, AXL inhibitors, PAK4 inhibitors, immunotherapeutic agents, immune checkpoint inhibitors, and agonists of stimulatory or co-stimulatory immune checkpoints.

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.

The invention belongs to the field of medicine synthesis, and particularly relates to a method for preparing fenerenone by recycling a fenerenone enantiomer. A brand new reaction route is designed, an enantiomer is subjected to photochemical catalysis to obtain an aromatization product, then in the presence of a specific catalyst, the aromatization product is subjected to dihydropyridine reduction to obtain a finelrenone racemate, and the finelrenone racemate is subjected to resolution, dissociation and recrystallization to obtain the finelrenone. Compared with the prior art, the method has the advantages that the fennerenone enantiomer is recycled, the recycled fennerenone enantiomer is used for preparing the fennerenone, compared with the prior art, photochemical catalysis is realized under the action of the specific catalyst, the reaction condition is mild, the operation is simple, the requirement on equipment is low, and the method is suitable for industrial production. According to the method, the recycling of the enantiomer of the fenerenone can be realized for industrial production of the fenerenone, the commercialization cost of the fenerenone is reduced, large-scale industrial production can be carried out, repeated recycling is realized, and a direction is provided for process improvement of the fenerenone.

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 invention provides a molecular sieve catalyst and a preparation method and application thereof, and belongs to the technical field of molecular sieve preparation. The preparation method of the molecular sieve catalyst provided by the invention does not use a template agent, and comprises the following steps: mixing an aluminum source, a silicon source, a molybdenum-containing active component and a modified molecular sieve seed crystal, and carrying out hydrothermal crystallization and roasting to obtain the molecular sieve catalyst, the modified molecular sieve seed crystal being an acid modified molecular sieve seed crystal or an alkali modified molecular sieve seed crystal. In the preparation process, a template agent is not used, framework silicon species of a molecular sieve seed crystal are removed through alkali modification, or framework aluminum species of the molecular sieve are removed through acid modification, and a mesoporous structure can be formed through modification treatment, so that an original microporous molecular sieve is changed into a microporous-mesoporous hierarchical pore structure, molecular diffusion is facilitated, and the molecular sieve has a good application prospect. The catalyst has good carbon deposition resistance and catalytic reaction activity; meanwhile, the good crystallinity is kept, and the catalytic performance and the reaction stability of the methane oxygen-free aromatization reaction are further improved.

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.