19 results about "N alkanes" patented technology

This invention belongs to the field of petroleum processing technology, and specifically relates to a production apparatus and method for low-pour-point base oil for aviation hydraulic oil. The production apparatus and method for low-pour-point base oil for aviation hydraulic oil includes the following steps: Hydrorefining of the oil, where the feedstock oil undergoes hydrodesulfurization and dearomatization in a two-stage series process to produce hydrorefined oil with <1% aromatics and <1 mg / kg sulfur content; Fine fractionation of the oil, specifically: the hydrorefined oil is finely fractionated in a fractionation tower to obtain hydrorefined distillate oil at 230℃~280℃; Molecular sieve dewaxing, specifically: the 230℃~280℃ hydrorefined distillate oil is subjected to deep removal of n-alkanes using a 5A molecular sieve, lowering the oil's pour point to below -75℃, producing low-pour-point, low-aromatic aviation hydraulic oil base oil. This invention uses a combined process of "low-pressure hydrorefining-molecular sieve dewaxing" to produce a low-sulfur, low-aromatic, low-pour-point base oil with less than 1% aromatics. The production method has the advantages of low investment and ease of implementation.

The application discloses a petroleum drilling fluid aftereffect homing method, device, equipment and medium, and relates to the technical field of petroleum exploration. The method comprises the following steps: obtaining a target drilling fluid sample with bubble oil flower characteristics during drilling; analyzing and testing the target drilling fluid sample by means of logging technology to obtain n-alkane and isomeric alkane data corresponding to the target drilling fluid sample; determining chromatographic total hydrocarbon parameters and chromatographic component parameters according to the n-alkane and isomeric alkane data corresponding to the target drilling fluid sample; comparing and analyzing the chromatographic total hydrocarbon parameters and the chromatographic component parameters with total hydrocarbon parameters and component parameters of cuttings at different depths in a layer with oil and gas shows during drilling operation to determine the depth corresponding to the target drilling fluid sample and to homing the drilling fluid aftereffect with the bubble oil flower characteristics. In conclusion, the application can reduce the affected factors and make the homing error of the petroleum drilling fluid smaller.

The present application relates to a method for separating normal and isomeric alkanes in naphtha by inorganic membrane, which matches the membrane separation process with the actual working condition in industrial application to realize continuous production and directly obtain the purified product. The process first carries out hydrogenation pretreatment on full-range naphtha, then directly enters the membrane separation unit without pressure and temperature adjustment, and then obtains separated normal / isomeric alkane products, and finally enters the subsequent application production unit. The product rich in normal alkanes obtained on the permeation side after membrane separation can be used as high-quality raw material for the subsequent ethylene cracking section, and the product rich in isomeric alkanes obtained on the retentate side can be used as high-quality catalytic reforming or high-quality gasoline raw material. Coupling the membrane separation with the naphtha production process does not introduce the third component, is simple to operate, and has low energy consumption. The present application mainly solves the practical problems in the prior art, such as the difficulty in recovering the adsorbent, the large amount of desorbent, and the high energy consumption in the separation process when the adsorption method is used to separate normal and isomeric alkanes.

The application discloses a method for preparing liquid fuel by two-stage hydrogenation of soapstock, and belongs to the field of soapstock recycling and reuse. The method adopts a two-stage reactor in series, hydrogenation pyrolysis of soapstock is carried out in a first-stage reactor, and catalytic hydrogenation deoxygenation reaction of pyrolysis volatile products is carried out in a second-stage reactor, so that liquid fuel is finally obtained. The method has mild reaction conditions, a simple process, low hydrogen consumption, and improved stability of the catalyst, and can achieve excellent hydrogenation deoxygenation effect under low pressure, and the prepared liquid fuel is free of oxygen-containing products and is normal alkanes with carbon numbers of 5 to 19, and the yield can reach 86% at the highest. The method can realize high-value utilization of soapstock, and can relieve energy shortage and environmental pollution.

The invention discloses a method for calculating coal rock maturity by simulating crude oil n-alkanes based on hydrocarbon generation heat. The method comprises the following steps: S1, collecting a rock core sample or a field outcrop sample; s2, performing a gold tube closed system hydrocarbon generation thermal simulation experiment on the sample, and collecting liquid hydrocarbon products generated at different temperature points; s3, performing gas chromatographic analysis on the liquid hydrocarbon product; s4, calculating the equivalent Ro of each temperature point, counting the peak area value of the n-alkanes at each temperature point, and selecting the n-alkanes with the carbon number of C6-C17 at each temperature point to calculate the sum of the peak areas; s5, fitting to obtain a function relation between the equivalent Ro and the sum of the peak areas of the n-alkanes; and S6, taking crude oil samples of the same hydrocarbon source rock source in the research area, measuring the n-alkane peak area of the crude oil, substituting peak area data into the function relation established in the step S5, and calculating to obtain the equivalent Ro of the crude oil samples. The method is suitable for quantitative calculation of crude oil maturity in all thermal evolution stages, and has important significance for oil-gas exploration.

An aviation fuel composition including an aromatic-based product generated by fluid catalytic cracking of a lipid feedstock in the presence of a fluid catalytic cracking, wherein the aromatic-based product comprises at least 50 vol. % aromatics, and a paraffinic-based product comprising normal paraffins and iso-paraffins in an amount of at least 85 vol. %. The aviation fuel composition meets the ASTM D1655-24b specification with the added requirements in Annex Al and / or the ASTM D7566-24d, Annexes A1-A8 specification requirements.

The invention provides a method for screening thin oil in thin oil blending and viscosity reduction, and relates to the technical field of thick oil thin oil blending and viscosity reduction. The method comprises the following steps: obtaining gas concentration curves of each n-alkane sample, each quasi-component sample, a to-be-diluted thick oil sample and each thin oil sample; determining a standard curve according to the gas concentration curve and the average carbon number information of each n-alkane sample; according to the gas concentration curve of each sample, the standard curve determines the average carbon number information of each quasi-component sample, the average carbon number information of the thick oil sample to be doped with the thin oil and the average carbon number information of each thin oil sample; determining an average carbon number interval according to the average carbon number information of each quasi-component sample and a mixing experiment result; and determining a target thin oil sample according to the average carbon number interval, the average carbon number information of the heavy oil sample to be doped with the thin oil and the average carbon number information of each thin oil sample. According to the method, the technical effect of improving the thin oil screening accuracy is achieved.

A process includes coprocessing a slurry hydroprocessing feed stream comprising a solid biomass feedstock and a liquid feedstock including one or more of fats, oils and greases in the presence of a slurry hydroprocessing catalyst and hydrogen in a slurry hydroprocessing zone and under slurry hydroprocessing conditions to produce a liquid hydroprocessing effluent having a first n-paraffin content and a first aromatic content, and coprocessing the liquid hydroprocessing effluent by subjecting the liquid hydroprocessing effluent to a hydrodeoxygenation catalyst and under hydrodeoxygenation reaction conditions to produce a hydrodeoxygenated liquid effluent, and subjecting the hydrodeoxygenated liquid effluent to a hydroisomerization catalyst and under hydroisomerization reaction conditions thereby producing a liquid hydrocarbon product having a second n-paraffin content less than the first n-paraffin content and a second aromatic content less than the first aromatic content.

The invention relates to the technical field of petrochemical product analysis, in particular to a method for measuring n-alkane content and carbon number distribution of white oil based on gas chromatography-mass spectrometry, which comprises the following steps: carrying out gas chromatography-mass spectrometry detection on a white oil sample to obtain total ion flow and mass spectrometry data; determining retention time and peak area of n-alkanes with different carbon numbers in the total ion chromatogram according to the total ion current and the mass spectrum data; and according to the retention time and the peak area, obtaining the n-alkane content in the white oil sample, the proportion of each carbon number interval and the carbon number distribution. The separation effect is good, the test result is accurate and reliable, the content and carbon number distribution of the n-alkanes in the C12-C34 carbon number interval can be measured, a mass spectrum detector is used, the carbon number distribution interval defining accuracy is improved, a standard sample is not needed for comparison, the detection process is convenient and rapid, and application and popularization are facilitated.

The application discloses a kind of net taste temperature control asphalt additive, asphalt composition and preparation method thereof.Net taste temperature control asphalt additive of the application includes the following components by weight parts: auxiliary odor control agent, 1-5 parts;Dispersing agent, 1-10 parts;Odor control temperature microcapsule, 1-5 parts;The odor control temperature microcapsule includes composite shell material and core material, wherein the composite shell material includes inorganic base layer shell, barium titanate nanoparticles, polydopamine and cuprous oxide, the core material includes n-alkane with phase transition temperature of 40-60 DEG C, and the composite shell material surface is loaded with active smoke suppression compound.The net taste temperature control asphalt prepared by adding odor control temperature microcapsule into asphalt can efficiently and durably reduce the content of irritating gas in asphalt fume, reduce the content of volatile organic compounds released by asphalt pavement at high temperature, improve the high-temperature stability of asphalt, and prolong the service life of asphalt pavement by the temperature control effect of microcapsule and the odor control effect of active components on the surface of microcapsule.

In accordance with one or more embodiments of the present disclosure, a process for treating a diesel feedstock to convert diesel to component-paraffins includes hydrodesulfurizing and hydrodenitrogenizing the diesel feedstock to reduce a sulfur content of the diesel feedstock and a nitrogen content of the diesel feedstock; hydrocracking the hydrodesulfurized and hydrodenitrogenized diesel feedstock over a metal-containing diesel hydrocracking catalyst comprising at least one zeolite to produce a hydrocrackate fraction; separating the hydrocrackate fraction into a first stream enriched in n-paraffins and a second stream enriched in iso-paraffins and naphthenes; and reverse isomerizing at least a portion of the second stream over an isomerization catalyst to convert at least a portion of the iso-paraffins to n-paraffins, producing a reverse isomerate fraction.

The application discloses a kind of net taste temperature control asphalt additives, net taste temperature control asphalt and preparation method thereof.Net taste temperature control asphalt additives of the application includes the following components by weight parts: net taste temperature control microcapsule, 1-5 parts;Auxiliary odor control agent, 1-5 parts;Dispersing agent, 1-5 parts;The net taste temperature control microcapsule includes composite shell material and core material, wherein the composite shell material includes silicon dioxide / nano tourmaline / polydopamine, the core material includes n-alkane with phase transition temperature of 40-60 ℃, and the surface of the composite shell material is loaded with metal chelate and smoke suppression compound containing active alpha-H.Net taste temperature control asphalt additive of the application can efficiently and durably reduce the content of irritating gas in asphalt fumes, reduce the content of volatile organic compounds released at high temperature of asphalt pavement, improve the high-temperature stability of asphalt, and prolong the service life of asphalt pavement, providing a new idea for the long-life and environmentally friendly use of asphalt.

A refrigerant oil base oil in which the content of cyclic saturated components in saturated components is 40 mass% or less, the content of acyclic saturated components is 60 mass% or more, and the density at 15°C is 0.805 g / cm 3 Hereinafter, the normal paraffin content is 50 mass% or less.

This invention relates to the field of isotropic carbon materials technology, specifically to a petroleum coke and its preparation method. (1) After desolidation of inferior aromatic oil, it is separated to obtain light and heavy components; wherein the separation method is selected from distillation and / or extraction, the cutting temperature of distillation is 450-550℃, and the extraction solvent of extraction is n-alkanes; (2) The heavy components, hydrogen and hydrogenation catalyst are contacted to carry out a hydrogenation reaction to obtain hydrogen-rich gas and hydrogenated oil; (3) The hydrogenated oil and optional auxiliary oil are subjected to delayed coking to obtain petroleum coke. The petroleum coke preparation method provided in this invention uses inferior aromatic oil as raw material and utilizes the heavy components in the inferior aromatic oil to prepare petroleum coke that can be used to prepare isotropic graphite, solving the problem of the outlet of inferior aromatic oil, significantly improving the added value of the heavy fraction in inferior aromatic oil, and is suitable for industrial promotion.

The invention relates to a method and a system for producing a chemical material from diesel oil and / or light wax oil. The method comprises the following steps: introducing raw oil into a reactive distillation tower from a raw oil inlet for contact reaction with hydrogen; the raw oil is diesel oil and / or light wax oil; wherein the reactive distillation tower comprises an upper distillation section and a lower stripping section which are in fluid communication, and the raw oil inlet is positioned between the distillation section and the stripping section; a hydrogenation pretreatment catalyst, a first hydrocracking catalyst, a second hydrocracking catalyst and a hydrorefining catalyst are sequentially arranged in the stripping section from top to bottom. According to the method disclosed by the invention, high-quality light hydrocarbon can be produced more, the yield of kerosene is reduced, and secondary cracking can be further enhanced, so that the ratio of n-alkane to isoparaffin in the light hydrocarbon is remarkably increased.

A process includes processing a solid biomass feedstock in a renewable liquid carrier in the presence of a slurry hydrocracking catalyst and hydrogen in a slurry hydrocracking zone and under slurry hydrocracking conditions, thereby producing a liquid biomass effluent having a first aromatic content, coprocessing the liquid biomass effluent and a liquid feedstock comprising one or more of fats, oils and greases in the presence of a hydrotreating catalyst and under hydrotreating conditions, thereby producing a liquid hydrotreating effluent having a first n-paraffin content and the first aromatic content, and processing the liquid hydrotreating effluent in the presence of a hydroisomerization catalyst and under hydroisomerization reaction conditions, thereby producing a liquid hydrocarbon product having a second n-paraffin content less than the first n-paraffin content and a second aromatic content less than the first aromatic content.

This invention discloses a method, system, and application for preparing high-purity n-hexane. The method includes hydrogenating raffinate, adsorbing and desorbing the hydrogenation product, separating the resulting extract rich in n-alkanes, and then removing light and heavy hydrocarbons to obtain high-purity n-hexane. The process of this invention is simple to operate and effectively solves the difficulties of low purity and difficult separation in existing n-hexane production processes. It can be applied to the continuous industrial production of n-hexane from reforming raffinate and ethylene raffinate.

The application discloses asphalt mixture and a preparation method thereof. The asphalt mixture comprises the following components in parts by weight: graded stone: 92.5-95.8 parts; environment-friendly asphalt: 4-6 parts; odor-free temperature control microcapsule: 0.2-1.5 parts; the odor-free temperature control microcapsule comprises a composite shell material and a core material, wherein the composite shell material comprises an inorganic base shell, barium titanate nanoparticles, polydopamine and cuprous oxide, the core material comprises n-alkane with a phase transition temperature of 40-60 DEG C, and the composite shell material is loaded with an active smoke suppression compound. Compared with common asphalt mixture, the asphalt mixture has lower asphalt smoke emission and stronger road performance.

A method for producing aromatic hydrocarbon and isomeric alkane gasoline, characterized by comprising: treating a C6-C8 alkane raw material rich in normal alkane and / or mono-branched alkane through a process comprising hydrodesulfurization and hydrodenitrification, dehydration, fractional desulfurization, dehydration and alkane aromatization reaction to obtain aromatic hydrocarbon and isomeric alkane gasoline; in the fractional desulfurization and dehydration, the material treated through hydrodesulfurization and hydrodenitrification, dehydration is sequentially subjected to first adsorption, sulfur conversion and second adsorption, and a dehydration step is arranged after the second adsorption to make the water content lower than 1 ppm. The method can convert low-octane alkane into aromatic hydrocarbon and high-octane isomeric alkane gasoline.