39 results about "Cyclic alkane" patented technology

This invention relates to a 1,3,4-thiadiazole peptide deformylase inhibitor and its preparation and application. The structural formula is shown in formula (1): wherein, R 1 It is n-butyl or cyclopentylmethyl; R 2 The compounds are hydrogen-containing, straight-chain alkanes, cyclic alkanes, aromatic rings, substituted biphenyls, or heterocyclic rings. The 1,3,4-thiadiazole peptide deformylase inhibitors provided by this invention can effectively inhibit bacterial protein synthesis, thereby achieving sterilization. These compounds exhibit excellent inhibitory activity against Gram-positive drug-resistant bacteria, especially the clinically challenging methicillin-resistant Staphylococcus aureus (MRSA). In particular, some preferred compounds show inhibitory activity 4-8 times that of the control standards vancomycin and linezolid. The 1,3,4-thiadiazole peptide deformylase inhibitors provided by this invention also exhibit inhibitory activity against Gram-negative drug-resistant bacteria, especially against drug-resistant Acinetobacter baumannii, known as "superbugs," with an inhibitory activity reaching 0.5 μg / mL, far superior to vancomycin and linezolid.

The invention relates to the field of petroleum resin catalytic hydrogenation decolorization, and discloses a petroleum resin dechlorination decolorization method which comprises the following steps: (A) in the presence of a dechlorination catalytic adsorbent and in a protective atmosphere, performing a dechlorination reaction on a petroleum resin mixed solution to obtain a dechlorination product; (B) in the presence of a hydrogenation catalyst, mixing the dechlorination product with hydrogen for hydrogenation reaction to obtain a hydrogenation product; wherein the petroleum resin mixed liquid comprises a petroleum resin raw material and a diffusion liquid; the diffusion liquid is selected from at least one of C6-C12 monocyclic alkane, monocyclic aromatic hydrocarbon and C5-C10 paraffin. According to the method, the diffusion liquid is adopted for dechlorinating the petroleum resin under the protective atmosphere, so that the petroleum resin raw material is more convenient to convey and diffuse on the surface and inside the catalyst, the chlorine content in the petroleum resin is greatly reduced, the corrosion of chlorine to the device is prevented, the service life of the device is prolonged, and the operation risk is reduced.

The invention provides a synthesis method of a quaternary cycloalkane modified O-glucoside compound shown in formula 3, in the presence of a catalyst, a sugar compound shown in formula 1 with exposed hydroxyl and a quaternary tension ring substrate compound shown in formula 2 are subjected to nucleophilic addition reaction in an organic solvent to prepare the quaternary cycloalkane modified O-glucoside compound shown in formula 3: X is H, CF3 or Cl; a is a dioxolane type compound or a pyran type compound; the catalyst is phosphazene base P4-t-Bu, and the specific structural formula is shown in the specification.

The present invention discloses a method for synthesizing polycyclic alkanes from phenols derived from lignin via a one-pot two-step process. 1) In the first step of the reaction, the phenolic compound derived from lignin is first converted into a ketone compound under the action of a hydrogenation catalyst, and then the ketone compound rapidly undergoes aldol condensation under the action of a solid acid to generate a jet fuel precursor; 2) In the second step of the reaction, the product of the first step is not separated, but the reaction conditions are directly strengthened. The jet fuel precursor is directly subjected to complete hydrodeoxygenation to generate polycyclic alkanes under the action of the hydrogenation catalyst and the solid acid in the first step; the phenolic compound derived from lignin is synthesized into polycyclic jet fuel by changing the reaction conditions in a single reaction vessel. Compared with traditional chain-like jet fuel, it has a higher density and a higher calorific value and can be used as a substitute for traditional aviation fuel. The catalyst and raw materials used in the present invention are abundant in source, low in price, and easy to separate; the entire production process is simple to operate.

The invention relates to a process for dehydrogenating a feed comprising a cyclic alkane with a 6-carbon ring, in order to produce an effluent comprising hydrogen and an aromatic compound, with a reaction section comprising at least one multitubular reactor comprising at least two tubes and a shell, said tubes comprising a fixed bed of at least one dehydrogenation catalyst - said feed supplies said tubes in gaseous form, at an inlet temperature of the feed greater than or equal to 300°C, at an inlet pressure of said feed between 0.1 and 1 MPa, at a weight-hourly spatial velocity (WHV) of the inlet feed between 1 and 15 h⁻¹ - a heat transfer fluid circulates in said shell, said heat transfer fluid is introduced at the inlet of said shell in gaseous form and is, at the outlet of the shell,at least partly in liquid form - said heat transfer fluid is introduced into the shell at a flow rate such that the ratio of the weight flow rate of said heat transfer fluid at the shell inlet to the weight flow rate of said charge at the tube inlets is greater than or equal to 1.0, at an inlet temperature between 320°C and 400°C, and at an inlet pressure between 0.10 MPa and 1.10 MPa.

The present invention discloses a method for producing chemical raw materials by two-stage hydrocracking of wax oil. The method comprises: hydrocracking the wax oil raw material in the presence of hydrogen to first obtain a first hydrocracking product with a low polycyclic alkane content; then selectively cracking the normal paraffins in the first hydrocracking product to obtain a second hydrocracking product; separating and fractionating the second hydrocracking product to obtain gas, light naphtha, heavy naphtha, and tail oil; finally, mixing the tail oil with hydrogen and hydrocracking it to convert it into a third hydrocracking product containing monocyclic cyclic hydrocarbons; separating and fractionating the third hydrocracking product to obtain a gas fraction, light naphtha, and heavy naphtha; wherein the reaction pressure of the first hydrocracking reaction zone is 2.0 to 5.0 MPa higher than the reaction pressure of the third hydrocracking reaction zone. This method can significantly improve the yield and quality of chemical raw materials when using wax oil as a raw material for two-stage hydrocracking production of chemical raw materials.

The application discloses a method for preparing polycyclic aviation kerosene from lignin-derived phenolic compounds and formaldehyde. The lignin-derived phenolic compounds and formaldehyde are polymerized into aviation kerosene precursors under the action of solid acid, and then the aviation kerosene precursors are subjected to hydrodeoxygenation through a bifunctional catalyst to obtain polycyclic aviation kerosene. Compared with traditional chain aviation kerosene, the polycyclic aviation kerosene has high density and high calorific value, and can be used as a substitute for traditional aviation fuel. The catalyst and raw materials used in the application are rich in sources, low in price and easy to separate; and the whole production process is simple to operate.

The present invention relates to the synthesis of compounds, and more specifically, to a sterically hindered di-secondary amine compound, a preparation method and a polyurea resin. The raw materials for preparing the compound include dimerized β-dicarbonyl compounds and primary amines. The present invention provides a sterically hindered di-secondary amine compound, by controlling the R' directly connected to the secondary amine to adopt a larger sterically hindered substituent such as a branched alkane or a cyclic alkane, and controlling the number of carbon atoms of R1 on the adjacent carbon atom, while promoting the synthesis of the compound and improving the yield, effectively improving the curing time with polyisocyanates, while bringing good comprehensive properties, such as smooth surface gloss, and adhesion, etc., to meet various application requirements. And the inventors found that by connecting the structure of β-ester groups to the secondary amine groups in the compound, when acting with polyisocyanates, it is more conducive to promoting the extension of the curing time to adjust the construction performance.

To provide a new composition containing 1,2-difluoroethylene (HFO-1132). A composition containing: HFO-1132; and at least one compound selected from the group consisting of: a fluoroacetylene represented by CX*CR1, wherein * is a triple bond, R1 is a monovalent group represented by CnX2m, where n is 0, 1, or 2, m = 2n + 1, and X and X1 are the same or different and are H or F, and at least one of X and X1 is F; a carboxylic acid fluoride represented by R2COF, wherein R2 is a monovalent group represented by CoX2p, where o is 0 or 1, p = 2o + 1, and X2 is H or F; a cyclic alkane represented by CqHrFs, wherein q is 3, 4, or 5, r and s are integers of 0 or more and 2q or less that are the same as or different from each other, and r + s < 2q; and formic acid.

The invention relates to a process for dehydrogenating a feedstock comprising a cyclic alkane having a 6-carbon ring, in order to produce an effluent comprising hydrogen and an aromatic compound, with a reaction section comprising at least one multitubular reactor which comprises at least two tubes and a shell, said tubes comprising a fixed bed of at least one dehydrogenation catalyst, wherein - the feedstock is supplied to the tubes in gaseous form, with an inlet temperature of the feedstock being greater than or equal to 300°C, an inlet pressure of the feedstock being between 0.1 and 1 MPa, and a weight hourly space velocity (WHSV) of the feedstock at the inlet being between 1 and 15 h-1, - a heat-transfer fluid circulates in the shell, the heat-transfer fluid being introduced at the inlet of the shell in gaseous form and, at the shell outlet, being at least partly in liquid form, - the heat-transfer fluid is introduced into the shell at a flow rate such that the ratio of the flow rate by weight of the heat-transfer fluid at the shell inlet, relative to the flow rate by weight of the feedstock at the inlet of the tubes, is greater than or equal to 1.0, at an inlet temperature of between 320°C and 400°C, and at an inlet pressure of between 0.10 MPa and 1.10 MPa.

This invention discloses a photocurable encapsulation composition, comprising a photocurable monomer, a silicon-containing monomer, and an initiator; the photocurable monomer is an epoxy compound containing an oxocyclic alkyl group without silicon in its molecule; the silicon-containing monomer comprises the structures shown in formulas (1) and (2); in formula (1), R1-R9 are each independently an aliphatic hydrocarbon substituted or unsubstituted with an oxocyclic alkyl group, Z1 is a chain or cyclic alkane group with 1-15 carbon atoms substituted with an oxocyclic alkyl group, n+m+p>0; in formula (2), R 10 Z1 is a C1-C6 alkane group, Z2 is a chain or cyclic alkane group with 1-15 carbon atoms substituted by an oxocyclic alkyl group, and q is an integer greater than 1. The photocurable encapsulation composition generated by this invention has a low dielectric constant, solving the problem of touch performance delay when encapsulating OLED devices with thin films.

The present invention relates to a method for dehydrogenating a feedstock comprising methylcyclohexane in order to produce a dehydrogenation effluent comprising hydrogen and toluene, by bringing said feedstock into contact with a dehydrogenation catalyst implemented in a reaction section comprising at least one adiabatic reactor, the catalyst comprising an active phase comprising at least platinum and potassium in an amount of between 0.03% and 1% by weight of elemental potassium relative to the total weight of the catalyst, and a support comprising alumina.

A process for oxidizing an alkyl substrate may comprise combining an alkyl substrate (e.g., propane, n-butane) and ozone in a liquid phase medium comprising a branched alkane activator (e.g., isobutane) and a protic additive (e.g., water) under conditions sufficient to oxidize the alkyl substrate to products. The alkyl substrate may be selected from linear and cyclic alkanes.

The invention relates to a process for dehydrogenating a feed comprising a cyclic alkane with a 6-carbon ring, in order to produce an effluent comprising hydrogen and an aromatic compound, with a reaction section comprising at least one multitubular reactor which comprises at least two tubes and a calender, said tubes comprising a fixed bed of at least one dehydrogenation catalyst comprising an active phase comprising at least platinum, potassium at a content of between 0.03% and 1% by weight of element potassium relative to the total weight of the catalyst, and a support comprising alumina.

The present application relates to the technical field of amide preparation, and discloses a method for preparing amides with more than 11 carbon atoms by photocatalytic oxidation and amination. The method comprises the following steps: under the action of a photocatalyst and an additive, a nitrogen source and an alkane or a derivative thereof are reacted in a solvent under light irradiation, and after post-treatment, a cyclic amide or a chain amide is obtained; wherein the photocatalyst comprises a photoactive carbazole compound; the additive comprises an acidic substance and an alkaline substance; and the alkane is selected from one or more of substituted or unsubstituted cyclic alkanes with more than 11 carbon atoms and substituted or unsubstituted chain alkanes with more than 11 carbon atoms. In the method, the alkane or the derivative thereof with more than 11 carbon atoms on the ring is directly broken and rearranged to synthesize a lactam and a chain amide by catalysis of the photocatalyst, the reaction condition of the method is mild, and the generation of tar and coke when a high-pressure mercury lamp and a ultraviolet lamp are used is avoided.

The present invention relates to a process for dehydrogenating a feed comprising methylcyclohexane to produce a dehydrogenation effluent comprising hydrogen and toluene, by contacting said feed with a dehydrogenation catalyst implemented in a reaction section comprising at least one adiabatic reactor, said catalyst comprising an active phase comprising at least platinum and potassium at a content of between 0.03% and 1% by weight of element potassium relative to the total weight of the catalyst, and a support comprising alumina.

This invention discloses a method for the direct oxidative carbonylation of methane to prepare acetic acid. Specifically, this invention provides a catalytic method for the preparation of acetic acid from methane, comprising the following steps: under solvent conditions, in the presence of light, an iron catalyst, chloride ions, and an oxidant, methane and carbon monoxide undergo a methane oxidative carbonylation reaction to obtain acetic acid. This method utilizes readily available methane, carbon monoxide, and air (or oxygen), employs an iron catalyst, and achieves direct, efficient, and highly selective acetic acid production via a one-step photocatalytic reaction, demonstrating promising application prospects. The substrate scope of this invention is broad, applicable to a range of chain and cyclic alkanes.

The present invention discloses a method for hydrocracking wax oil. The method comprises: hydrocracking a wax oil feedstock in the presence of hydrogen to first obtain a first hydrocracking product with a low polycyclic alkane content; then selectively cracking the normal paraffins in the first hydrocracking product to obtain a second hydrocracking product; and finally converting the product into a third hydrocracking product containing monocyclic cyclic hydrocarbons. The third hydrocracking product is separated and fractionated to obtain a gas fraction, light naphtha, heavy naphtha, and tail oil. This method can significantly improve the yield and quality of chemical raw materials when hydrocracking wax oil is used as a feedstock to produce chemical raw materials.

This invention discloses a method for preparing coal-based high-density fuels, including adamantane fuels and branched polycyclic cyclic alkanes (PCALs), addressing the problems of limited preparation pathways, limited raw materials, poor low-temperature performance of some PCALs, and low catalyst efficiency in existing related fuels. This invention uses a variety of widely available PCALs and PCALs as raw materials, including non-fused-ring PCALs, non-fused-ring PCALs, and PCALs containing bicyclic [2.2.1]heptane substituents, employing AlCl3 or aluminochlorochlorohydrate ionic liquids as isomerization rearrangement catalysts. Molecular structure is controlled through directional isomerization rearrangement reactions, optimizing fuel cohesion and configuration. This method significantly expands raw material sources, increases the yield of target products, shortens reaction time, reduces reaction temperature and cost, and improves the low-temperature performance of raw materials, producing high-density, high thermal oxidation stability, low viscosity, and low freezing point high-performance fuels, laying the foundation for their large-scale production and industrial application.

The invention relates to a process for dehydrogenating a feed comprising a cyclic alkane with a 6-carbon ring, in order to produce an effluent comprising hydrogen and an aromatic compound, with a reaction section comprising at least one multitubular reactor which comprises at least two tubes and a shell, said tubes comprising a fixed bed of at least one dehydrogenation catalyst - said feed feeds said tubes in gaseous form, at a feed inlet temperature greater than or equal to 300°C, at an inlet pressure of said feed between 0.1 and 1 MPa, at a weight hourly space velocity (WPH) of the feed at the inlet of between 1 and 15 h-1 - a heat transfer fluid circulates in said shell, said heat transfer fluid is introduced at the inlet of said shell in gaseous form and is, at the outlet of the shell,at least partly in liquid form - said heat transfer fluid is introduced into the calender at a flow rate such that the ratio of the weight flow rate of said heat transfer fluid at the calender inlet relative to the weight flow rate of said charge at the tube inlet is greater than or equal to 1.0, at an inlet temperature of between 320°C and 400°C, and at an inlet pressure of between 0.10 MPa and 1.10 MPa.,

The invention belongs to the field of synthesis of fine chemical intermediates, and discloses a multi-site substituted bromopyrene intermediate and a derivative, a preparation method and application thereof. The molecular structural formula of the bromopyrene intermediate is # imgabs0 #, wherein X1, X2 and X3 are bromine atoms or H; and X1, X2 and X3 are not H at the same time. R1 is an alkane having 1 to 90 carbon atoms, a heterocyclic alkane having 1 to 90 carbon atoms, a substituted aromatic hydrocarbon having 5 to 90 carbon atoms, an aryloxy group having 5 to 90 carbon atoms, an aromatic amine having 5 to 90 carbon atoms, a boron aromatic hydrocarbon having 5 to 90 carbon atoms, or an aromatic heterocyclic group having 5 to 90 carbon atoms. The prepared pyrenyl luminescent material can effectively improve the solubility of target molecules, and is applied to the fields of organic luminescent devices, organic photovoltaic devices, perovskite solar devices, fluorescent falsification prevention, thermal response stimuli response, biological imaging and the like.

The application provides a synthesis method of a tetra-cyclic alkane modified O-glycoside compound of formula 3, which comprises the following steps: in the presence of a catalyst, a compound of formula 1 with a bare hydroxyl group is subjected to a nucleophilic addition reaction with a tetra-tension ring substrate compound of formula 2 in an organic solvent to obtain the compound of formula 3, wherein X is H, CF3 or Cl; A is a dioxolane compound or a pyran compound; and the catalyst is a phosphazene base P4-t-Bu, and a specific structural formula is shown in the description.

The present application relates to the technical field of diesel processing, and discloses a method for producing high-value chemical raw materials from straight-run diesel, comprising the following steps: (1) contacting straight-run diesel with a hydrocracking catalyst to perform a selective cracking reaction of alkyl cyclic hydrocarbon side chains, and obtaining a selective cracking product; wherein the side chain breaking rate of alkyl cyclic hydrocarbons with a side chain carbon number greater than 2 in the straight-run diesel is not less than 60%, and the total molar loss rate of naphthenes and aromatics in the selective cracking product is not higher than 15%; (2) separating the selective cracking product to obtain a light fraction rich in chain hydrocarbons and a heavy fraction rich in cyclic hydrocarbons; and (3) contacting the heavy fraction with a hydrogenation ring-opening catalyst to perform a hydrogenation ring-opening reaction. The method can obtain high-quality ethylene cracking raw materials and reforming raw materials with high aromatic potential content, and realizes efficient production of high-value chemical raw materials from straight-run diesel.

The present application relates to an intumescent coating composition including: (a) an epoxy resin including in the backbone one or more alkylene moieties all of which are selected from a di-valent alkane radical of formula (I) in which Ra and Rb are each H, OH or an aromatic group and z is an integer of 1 to 8, and / or a di-valent cyclic alkane radical, (b) an alkylene bis(meth)acrylate, wherein said alkylene has 4 or more, preferably 5 or more, carbon atoms, (c) a curing agent, and (d) a compound providing an expanding gas upon thermal decomposition. Additionally, the present application further relates to a method of coating a substrate and a substrate at least partially coated with a coat deposited from the coating composition.

The invention discloses a method for synthesizing a difluoroolefin compound through tungsten / chromium concerted catalysis of non-activated alkane. Compared with the prior art, the invention provides the method for realizing direct difluoroallylation by synergistically catalyzing the non-activated alkyl C (sp3)-H bond by tungsten / chromium instead of noble metal. The preparation method provided by the invention is simple in operation steps and good in substrate universality, multiple primary, secondary and tertiary C-H bonds in covering polycyclic and heterocyclic ring substituted alpha-trifluoromethyl styrene, such as naphthalene, dibenzothiophene and dibenzofuran, as well as cyclic alkane and straight-chain alkane, are very easily modified, and the method has wide functionality tolerance, and is suitable for industrial production. The method has the advantages of mild reaction conditions and high yield, and is a green chemical synthesis method with good application prospects.

The disclosure relates to a sustainable aviation fuel, wherein the sustainable aviation fuel comprises at least 98 wt% of C6-C16 carbon number hydrocarbons of the total weight of the sustainable aviation fuel; at least 25 wt% of naphthenes, containing one naphthenic ring, of the total weight of the sustainable aviation fuel; at least 50 wt% of cyclic hydrocarbons of the total weight of the sustainable aviation fuel; and wherein the ratio of alkanes to cyclic hydrocarbons is between 5:7 and 5:10. The disclosure further relates to the use of the sustainable aviation fuel as a kerosene or as a fuel blend component.

The invention discloses a renewable high-octane-number alcohol hydrocarbon fuel with ultralow particulate matter emission and a preparation method thereof, and belongs to the technical field of fuels. The fuel is prepared from the following components in percentage by volume: 35 to 65 percent of alcohol component, 20 to 45 percent of high-octane isoparaffin, 5 to 18 percent of cycloparaffin and 0.5 to 5 percent of functional additive bag, the oxygen content is 15-25wt%, and the research octane number is not less than 100. The preparation method comprises the following steps: dehydrating the raw materials, premixing cycloalkane and part of isoparaffin to form the alkyl carrier, integrating the alcohol component into the alkyl carrier, finally adding the additive, and homogenizing and stabilizing. According to the fuel, through the synergistic effect of specific components, the high octane number and good engine adaptability are guaranteed, meanwhile, particulate matter emission is remarkably reduced, and the fuel has excellent storage stability and material compatibility.

The invention discloses a biomass-based high-energy-density aviation fuel and a method for preparing the biomass-based high-energy-density aviation fuel through a biomass-based ketone McMurry coupling reaction, and the biomass-based high-energy-density aviation fuel has a structural formula as follows: during preparation, a biomass-based ketone platform compound is taken as a raw material and subjected to the McMurry coupling reaction under the action of a catalyst, and the biomass-based high-energy-density aviation fuel is obtained. The biomass-based pinacol or biomass-based polycyclic olefin derivative is prepared as an aviation oil precursor compound, and the reaction yield can reach 92%; then in an H2 atmosphere, a Pd / C (5-10%) catalyst is selected, a hydrodeoxygenation reaction is carried out under the conditions that the pressure is 5-10 MPa, the temperature is 220-260 DEG C and the time is 4-12 h, biomass-based polycycloalkane is obtained through conversion, and the high-energy-density liquid fuel is obtained. The method can meet the requirements of high-energy-density liquid fuel (greater than or equal to 0.85 g / ml), realizes consideration of freezing point, density and heat value, remarkably improves the yield, improves the utilization rate of raw materials, and is convenient for industrial popularization.

The application discloses a preparation method of a bifunctional catalyst, which comprises the following steps: (1) preparing a niobium tartrate aqueous solution; (2) dissolving diammonium hydrogen phosphate in water; (3) mixing the solutions and adjusting the pH value by using an acid; (4) adding an aqueous solution of cetyltrimethylammonium bromide; (5) hydrothermally crystallizing in a high-pressure hydrothermal kettle for a period of time, then filtering and drying the obtained solid; (6) uniformly mixing a metal salt solution; (7) mixing the dried solid in step (5) into the metal salt solution in step (6) at a certain temperature and mixing for a period of time; and (8) drying and calcining the obtained solid after separation, so that the bifunctional catalyst is obtained. The application further discloses a use of the bifunctional catalyst prepared by the preparation method in catalyzing a one-pot solvent-free reaction of a lignin derivative to obtain a polycyclic alkane fuel.