22 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 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 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.

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 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 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 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 invention belongs to the field of nano materials, and relates to a method and a system for preparing horizontal array carbon nanotubes from light petroleum. According to the method, C13-C22 polycyclic alkane and / or C13-C22 polycyclic aromatic hydrocarbon are / is used as a carbon source, and the horizontal array carbon nanotubes are prepared by using a chemical vapor deposition method. The raw materials are cheap and easy to obtain, and the process temperature is low, so that compared with a traditional preparation process taking methane as a carbon source, the method has the advantage that the cost of the array carbon nanotube can be greatly reduced.

The invention relates to a method for dehydrogenating a feedstock 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, the tubes comprising a fixed bed of at least one dehydrogenation 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.

The invention relates to the field of petroleum resin catalytic hydrogenation decolorization, and discloses a petroleum resin catalytic decolorization method which comprises the following steps: (A) in the presence of a dechlorination adsorbent and in a protective atmosphere, a petroleum resin mixed solution is subjected to a dechlorination reaction in a dechlorination reaction zone to obtain a dechlorination product; (B) in the presence of a sulfurized hydrogenation catalyst, mixing the dechlorination product with hydrogen, and carrying out hydrogenation reaction in a hydrogenation reaction zone 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; the feeding mode of the dechlorination product and the hydrogen is a down-flow feeding mode. The method is friendly to a dechlorinating agent, the content of HCl in the reaction process is reduced, corrosion to equipment is reduced, a sulfurized hydrogenation catalyst is adopted in the hydrogenation reaction, and the Gardner chromaticity of the petroleum resin is effectively reduced.

This invention relates to the field of surfactant technology for oil and gas fields, and particularly to a functional surfactant for oil and gas fields and its preparation method, comprising modified nanoparticles, nitrogen-containing heterocyclic alkanes, and organosilicon surfactants; the modified nanoparticles are sulfonic acid-modified nano-silica; the nitrogen-containing heterocyclic alkanes are macrocyclic alkanes composed of C-N, C-O, or C-C bonds; and the organosilicon surfactant is a cage-type oligomeric silsesquioxane. The present invention utilizes the above-mentioned functional surfactant for oil and gas fields and its preparation method, resulting in a surfactant with good stability, good rheological properties, and temperature and salt resistance, effectively reducing oil-water interfacial tension and improving oil recovery.

A method for producing gasoline blending components, the obtained gasoline blending components and a reaction device, light hydrocarbon raw materials enter a catalytic distillation column, so that 5-20% of benzene and naphthenes in the light hydrocarbon raw materials enter the light hydrocarbon isomerization reaction section to undergo isomerization reaction, and then are separated through a rectification section, C5 alkanes and multi-methyl C6 isomeric alkanes are obtained at the top; the side line discharge enters an aromatization reaction zone to undergo aromatization reaction, and the reaction product of the aromatization reaction zone is used as a circulating material; 80-95% of benzene and naphthenes in the light hydrocarbon raw materials and other heavy components enter a naphthenic isomerization reaction zone to undergo benzene saturation and naphthenes isomerization reaction, and then the liquid phase product obtained after gas-liquid separation of the reaction stream is mixed with the top discharge of the catalytic distillation column to obtain high-octane gasoline blending components. The method provided by the application reduces the benzene content of the obtained gasoline blending components, increases the yield of naphthenes, and the octane number of the gasoline blending components is high.