122 results about "Hydrocarbon mixtures" patented technology

The invention belongs to the technical field of extraction separation, and relates to a silver-based eutectic solvent which is composed of silver salt serving as a hydrogen bond acceptor and an organic compound serving as a hydrogen bond donor. Wherein the organic compound serving as the hydrogen bond donor is a carbonyl organic compound or an alcohol organic compound. The silver-based deep-eutectic solvent provided by the invention is easy to prepare, the structure is easy to regulate and control, and the silver-based deep-eutectic solvent has the advantages of good thermal stability, reproducibility and the like, and has high unsaturated hydrocarbon absorption capacity and excellent separation performance for unsaturated hydrocarbon mixtures.

The disclosure relates to a process for producing ammonia. A hydrocarbon mixture and steam are supplied to a primary reformer. The hydrocarbon mixture and the steam are at least partly converted to carbon monoxide and hydrogen in the primary reformer. The gas mixture from the primary reformer is directed into a secondary reformer. The secondary reformer is supplied with process air, at least comprising oxygen and nitrogen, such that unconverted hydrocarbon is converted to carbon monoxide and hydrogen.

The present invention discloses a method for co-producing bio-aviation fuel from corncobs, which comprises the following steps: screening and pulverizing corncobs to control the particle size to be 10-15 mm; mixing the pulverized corncobs with furfural production wastewater containing acetic acid for hydrolysis reaction to generate a dilute furfural solution at 195-205 °C and 1.25-1.3 MPa; subjecting the solid residue after hydrolysis to alkali treatment to separate and obtain crude cellulose; subjecting the crude cellulose to acidolysis reaction by microwave heating in a solid acid catalyst and formic acid solution to generate a dilute levulinic acid solution; catalytically polymerizing the dilute furfural solution and the dilute levulinic acid solution under the action of a copper-based catalyst to generate a C10-C15 hydrocarbon mixture; generating a C10-C15 saturated hydrocarbon liquid mixture through oil-water separation and deoxygenation and hydrogenation reaction of a nickel-based catalyst; and finally through fractional distillation and activated carbon filtration; this method realizes the efficient co-production of furfural, cellulose and bio-aviation fuel from corncobs, and has the advantages of high raw material utilization rate, excellent catalytic efficiency, low energy consumption and environmental friendliness.

The invention discloses a reservoir stratum type identification method and system based on thermal evaporation hydrocarbon, and the method comprises the steps: heating a rock sample from a to-be-identified reservoir stratum, and collecting a hydrocarbon mixture generated in the heating process; separating the hydrocarbon mixture into a plurality of monomer hydrocarbons, and then identifying n-alkanes in the monomer hydrocarbons; the method comprises the following steps: acquiring a chromatographic peak of each monomer hydrocarbon, then integrating all the chromatographic peaks into a total structure peak representing the content of a hydrocarbon mixture in a to-be-identified reservoir oil-gas component, and integrating n-alkane chromatographic peaks with a specified carbon number range into a first chromatographic peak representing the content of n-alkane, so as to identify the content of the n-alkane in the to-be-identified reservoir oil-gas component, and on the basis, determining the content of the n-alkane in the to-be-identified reservoir oil-gas component. Obtaining a second chromatographic peak representing the content of the unrecognizable substance; and determining the type of the reservoir stratum according to the percentage of the second chromatographic peak area in the total structure peak area and the ratio of the second chromatographic peak area to the first chromatographic peak area. According to the invention, the oil-water identification precision is effectively improved, and the rapid and accurate identification of the type of the reservoir stratum is realized.

An electrical heater system includes a heater block, a plurality of heating element holes transversing the heater block, a plurality of radiant coil holes transversing the heater block, a plurality of electrical heating elements disposed within the plurality of heating element holes, and a plurality of radiant coils disposed within the plurality of radiant coil holes. A process for olefin production includes heating a plurality of radiant coils using an electrical heater, feeding a hydrocarbon mixture into a plurality of inlet tubes, controlling a temperature of a plurality of electrical heating elements to heat a heater block to a desired temperature, cracking the hydrocarbon mixture in the plurality of radiant coils to produce a cracked effluent, collecting the cracked effluent through a plurality of outlet tubes, and cooling the cracked effluent using a heat exchanger.

The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (10) and a second distillation unit (12), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether in the etherification unit (3); (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), and the alkyl tert-butyl ether being withdrawn as the bottom product (7); (c) vaporizing the bottom product from the first distillation unit (5) in an evaporator (8) obtaining a vapor stream (9); (d) reacting the vapor stream (9) of step (c) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (10); (e) distilling the reaction mixture (11) from the ether cleavage unit (10) in the second distillation unit (12), isobutene being withdrawn as the overhead product (13), the primary alcohol and diisobutene being withdrawn as the bottom product (14) and being recycled to the etherification unit (3); wherein a purge stream (15) containing high boiling components with a normal boiling point higher than that of the alkyl tert-butyl ether is withdrawn from the evaporator (8) in step (c).

The invention relates to the use of a composition (C) comprising, for 100% of the weight thereof,—from 10% by weight to 90% by weight of at least one poly(farnesene) polymer having a number-average molecular weight of greater than or equal to 10,000 g / mol and less than or equal to 120,000 g / mol, said poly(farnesene) polymer being partially or totally hydrogenated and / or functionalized with hydroxyl radicals, and—from 10% by weight to 90% by weight of a mixture (M) of hydrocarbons in which at last 94% by weight of said hydrocarbons comprise from 15 to 19 carbon atoms, for preventing and / or slowing the appearance of unattractive effects on human hair following exposure to intense heat. The invention also relates to a method for drying and shaping the hair, using said composition.

Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.

The invention relates to the technical field of plastic waste recycling, in particular to a high-performance rubber material containing a waste tire extract and a preparation method of the high-performance rubber material. The problems that the extraction efficiency of the substances in the waste tires is low, and the comprehensive performance of the rubber material prepared from the extracted substances is poor are solved. The method comprises the following steps: thermally decomposing organic components of waste tires in a low-oxygen and inert atmosphere, cracking a hydrocarbon mixture, removing interfering metals by combining processes such as crushing, magnetic separation and acid treatment, carrying out secondary cracking to improve the carbon quality, and extracting zinc oxide, regenerated white carbon black and carbon black by adopting alkali liquor dissolution and carbon dioxide precipitation, so that the extraction rates of the three products are remarkably improved. On the basis of raw materials obtained by an optimized extraction process, the adding sequence, dosage and mixing conditions of different types of fillers and auxiliaries are optimized, and a stable vulcanization network is constructed by step-by-step mixing, so that the rebound resilience, wear resistance and wet skid resistance of the high-performance rubber material are improved, and efficient recovery of waste tires and preparation of the high-performance rubber material are realized.

Embodiments of the present disclosure relate to a composition comprising a hydrocarbon mixture having a paraffin wax and at least one reactive moiety, and an ethylene acrylate terpolymer having a moiety that reacts with the at least one reactive moiety in the hydrocarbon mixture. For this embodiment, the ethylene acrylate terpolymer is formed from (A) a first monomer of ethylene, (B) a second monomer selected from the group consisting of vinyl acetate, alkyl acrylates, alkyl (meth) acrylates, and combinations thereof, and (C) a third monomer having the portion that reacts with at least one reactive portion of the hydrocarbon mixture, the third monomer selected from the group consisting of maleic anhydride, maleic diester, glycidyl acrylate, glycidyl methacrylate, glycidyl vinyl ether, and combinations thereof.

A method of producing useful fuel fluids from solid plastic waste, including loading solid plastic waste matter into a reaction chamber to define a load, subjecting the load to HTP to extract hydrocarbon mixtures, filtering the hydrocarbon mixtures to extract solid matter, and separating the hydrocarbon mixtures into a light fraction (C1 to C25) and a heavy fraction (C26 to C31). The heavy fraction is directed to a first container and the light fraction is directed to a second container. The light fraction is separated into diesel (C8-C25), gasoline (C4-C12), and vapor (C1-C5), and the diesel is directed to a third container, the gasoline is directed to a fourth container, and the vapor is directed to a fifth container. The hydrocarbon mixtures have a carbon number distribution between C1 and C31. The pressure in the reaction chamber is typically between 0.1 and 10 MPa and the temperature in the reaction chamber is between 350 and 500 degrees Celsius. The plastic waste is selected from the group consisting of PS, PE, PP, and mixtures thereof.

Zeolitic adsorbent for the separation of hydrocarbon isomers The present invention relates to an agglomerated zeolitic adsorbent based on faujasite (FAU) type zeolite crystals, a zeolitic adsorbent comprising barium or barium and potassium, said adsorbent having a pore distribution satisfying the following inequalities: 1) [Math 30] 2) [Math 31] in which VmaHg denotes the macropore volume of the adsorbent measured by mercury intrusion porosimetry, VmeN2 denotes the mesoporous volume of the adsorbent measured by nitrogen adsorption, V2-3.6 corresponds to the mesoporous volume for pore sizes ranging from 2 nm to 3.6 nm, V3.6-15 corresponds to the mesoporous volume for pore sizes ranging from 3.6 nm to 15 nm, V2-3.6 is equal to [Math 32] V2-3.6 = VmeN2 - VmeHg in which VmeHg denotes the mesoporous volume of the adsorbent measured by mercury intrusion porosimetry V3,6-15 is determined by the difference between the volume of mercury introduced at 15 nm and that introduced at 3.6 nm, the volumes being expressed in cm3.g-1, and its preparation process. The invention also relates to the use of the zeolite adsorbent agglomerate for the separation of hydrocarbon mixtures, as well as the process for separating hydrocarbon mixtures using said zeolite adsorbent agglomerate.,

Process and plant for the production of ammonia and urea which use as feedstock a gaseous mixture deriving from various industrial processes, in particular metallurgical iron ore reduction processes. The process produces a loop that uses the short contact time catalytic partial oxidation (SCT-CPO) reaction to convert purge gases of the ammonia synthesis to synthesis gas which is combined with the feedstock to be treated. The oxygen for the partial oxidation reaction is obtained by electrolysis of water or through air separation. The CO2 contained in the feedstock and / or emitted in the process steps is used for the production of urea.

A method for processing a hydrocarbon-containing mixture includes the steps of: I) separating the hydrocarbon-containing mixture into a light fraction and a heavy fraction; II) reacting the light fraction from step I) in an aromatization unit and separating the resulting reaction product into a C5− component and a C6+ component; III) reacting the heavy fraction from step I) and optionally the C6+ component from step II) in an aromatics conversion unit and separating the resulting reaction product into a C5− component, a C6-C7 component, a C8 component, and a C9+ component; and IV) optionally, steam cracking or catalytic cracking one or both of the C5− component from step II) and the C5− component from step III). The method can convert low-value hydrocarbon mixtures into C8 aromatic hydrocarbons and cracking raw materials, and improve the product value. A system for practicing this method is also provided.

This document discloses a system and method for separating cracked hydrocarbon mixtures. A main fractionation column separates the cracked hydrocarbon mixture into top, side, and bottom fractions containing C1 to C6+ hydrocarbons. A top condenser and high-pressure separation system partially condenses the top fraction and compresses the uncondensed vapor to produce a compressed gas fraction and a compressed liquid fraction. A first distillation column receives the compressed liquid fraction and separates it into a first top vapor and a first bottom fraction. A second distillation column separates the first bottom fraction into a second top fraction and a second bottom fraction. An absorber receives a portion of the second bottom fraction and the side liquid fraction and contacts it in countercurrent flow with the compressed gas fraction, thereby producing an absorber top fraction and absorber bottom fraction containing exhaust gas. Such a system can be used to integrate existing FCC / RFCC units with petrochemical complexes.

The present invention concerns a pyrolysis product composition comprising a bituminous hydrocarbon fraction and char particles dispersed within said bituminous hydrocarbon fraction, wherein the bituminous hydrocarbon fraction and the char particles together constitute at least 70 wt% of the pyrolysis product composition, wherein the bituminous hydrocarbon fraction and the char particles are present in a weight ratio of between 1 : 1 and 9 : 1, and wherein said composition is a liquid at a temperature between 120 and 230 °C and is a solid at temperatures up to 35 °C. The present invention further concerns a process for the production of said pyrolysis product composition in the form of a solid and to a pyrolysis system configured to convert a mixture of char particles and hydrocarbons resulting from pyrolysis of plastic waste material into a product in the form of solid particles.

The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (8) and a second distillation unit (10), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether as an intermediate product and diisobutene as a by-product in the etherification unit (3); (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), the alkyl tert-butyl ether and diisobutene being withdrawn as the liquid or vaporous bottom product (7), and vaporizing the bottom product (7) if it is withdrawn as a liquid; (c) reacting the vaporous bottom product (7) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (8); (d) distilling the reaction mixture (9) from the ether cleavage unit (8) in the second distillation unit (10), isobutene being withdrawn as the overhead product (11), the primary alcohol and diisobutene being withdrawn as the bottom product (12) and being recycled to the etherification unit (3); the plant further comprising a byproduct separation unit (15) being fed by a bottom purge stream (13) of the first distillation unit (5) and / or by a part of the bottom product of the second distillation unit (10), this feed stream (14) being split up in at least three byproduct streams wherein a first byproduct stream (16) is rich in diisobutene, a second byproduct stream (17) is rich in the primary alcohol, and a third byproduct stream (18) is rich in components with a normal boiling point higher than 110° C.

A Low Temperature Methane Steam Reforming LTMSR catalyst is based on a non-noble metal, an alkaline earth metal and a rare earth metal combination on a support to produce stable and low temperature methane steam reforming catalysts. The catalyst is suitable for steam reforming mixtures of light hydrocarbons, such as those found in natural gas and bio-gas sources. The output may be configured to provide methane and carbon dioxide in a ratio of around 1:1 by number which is suitable for further processing into end products. The process and catalyst may help show an improved long-term performance by suppressing the fast formation of coke that is well-known to deteriorate the activity of other conventional reforming catalysts. This performance is obtained by controlling the composition and crystalline sizes of the active catalyst components on the selected support and by controlling the reaction conditions.

A process for enhanced hydrocarbon recovery comprising the following steps: a) Preparation of an injection fluid comprising at least one water-soluble polymer obtained from 2-acrylamido-2-methylpropane sulfonic acid, with water or with brine, the 2-acrylamido-2-methylpropane sulfonic acid being, before polymerization, a crystalline form of the sodium salt of 2-acrylamido-2-methylpropane sulfonic acid having a powder X-ray diffraction pattern comprising peaks at 11.7°; 12.2°; 13.2°; 13.5°; 15.6°; 16.8°; 17.8°; 18.5°; 19.1°; 20.6°; 21.4°; 23.3°; 25.1°; 25.8°; 26.9°; 29.1°; 29.5°; 31.0°; 33.0°; 33.6°; 34.4°; 35.2°; 35.9°; 37.1°; 38.4°; 39.6°; 41.1°; 42.9°; 45.1°; 46.0°; 47.2°; 47.6° degrees 2-theta; b) Injection of the injection fluid into a subsurface formation; c) Sweeping of the subsurface formation using the injected fluid; d) Recovery of an aqueous and hydrocarbon mixture.

The invention relates to a process for producing a jet fuel from a mixture to be treated, comprising, in particular, a mixture of phenolic compounds, preferably a lignin oil, the process comprising a step of hydrotreating the mixture to be treated, wherein the mixture to be treated has specific properties. The present invention also relates to a mixture of hydrocarbons and to a jet fuel obtained using this process.

Embodiments of the present invention relates to two improved catalysts and associated processes that directly converts carbon dioxide and hydrogen to liquid fuels. The catalytic converter is comprised of two catalysts in series that are operated at the same pressures to directly produce synthetic liquid fuels or synthetic natural gas. The carbon conversion efficiency for CO2 to liquid fuels is greater than 45%. The fuel is distilled into a premium diesel fuels (approximately 70 volume %) and naphtha (approximately 30 volume %) which are used directly as “drop-in” fuels without requiring any further processing. Any light hydrocarbons that are present with the carbon dioxide are also converted directly to fuels. This process is directly, applicable to the conversion of CO2 collected from ethanol plants, cement plants, power plants, biogas, carbon dioxide / hydrocarbon mixtures from secondary oil recovery, and other carbon dioxide / hydrocarbon streams. The catalyst system is durable, efficient and maintains a relatively constant level of fuel productivity over long periods of time without requiring re-activation or replacement.

A method for stabilizing whole crudes and condensate hydrocarbon mixtures. The method includes feeding a hydrocarbon mixture to a stabilizer column and separating the hydrocarbon mixture into an overhead offgas effluent and a stabilized hydrocarbon mixture; reboiling a stream from the stabilizer column with a heating medium, producing a reboiled stream; feeding the reboiled stream into the stabilizer column; heating a first side-stream from the stabilizer column with a stabilized hydrocarbon mixture from the stabilizer column, producing a heated first side-stream from the stabilizer column; and feeding the heated first side-stream into the stabilizer column.

A process including heating a hydrogen manufacturing unit feedstock producing a heated hydrogen manufacturing unit feedstock. The process includes stripping a wide boiling range hydrocarbon mixture with heated hydrogen manufacturing unit feedstock producing an overheads stream, separating the overheads stream to recover a non-condensed stream, and feeding the non-condensed stream to a hydrogen manufacturing unit. A process including feeding a hydrocarbon manufacturing unit feedstock to a stripping unit, recovering an overhead stream, feeding the overhead stream to a separation unit separating the hydrogen manufacturing unit feedstock from light boiling hydrocarbons, feeding a portion of the separated hydrogen manufacturing unit feedstock stream to a hydrogen manufacturing unit producing a hydrogen stream, feeding a first portion of the hydrogen stream and the bottoms stream to a first hydroprocessing unit, and feeding a second portion of the hydrogen stream, the first effluent, and the recovered medium boiling hydrocarbons to a second hydroprocessing unit.

A method for catalytic cracking of PVC waste using a zeolite catalyst to obtain a hydrocarbon mixture of gas components that are useful resources. The catalytic cracking method has high selectivity of useful components and can lower the content of chlorine, a harmful component.

The invention relates to a method for removing and immobilising carbon dioxide (102) from the atmosphere and / or a waste gas (113), comprising the steps of: a) converting the carbon dioxide (102) from the atmosphere and / or a waste gas (113) into biomass (100) by way of photosynthesis, preferably on agricultural surfaces, in particular in a greenhouse (1); b) carrying out a biogas reaction, in which the biomass (100) produced in step a) is converted into biogas (101), containing methane (103) and carbon dioxide (102), in particular in a biogas reactor (2); c) separating the methane (103) from the obtained biogas (101); d) splitting the methane (103) into carbon (106) and hydrogen (110), the carbon (106) being obtained as a solid; e) collecting the obtained carbon (106); f) depositing the obtained carbon (106); and g) reacting carbon dioxide (102) from the biogas with the hydrogen (110) obtained in step d) to form a hydrocarbon mixture.

The invention belongs to the technical field of oil field water treatment, and particularly relates to a treatment system and method for gas field produced water containing liquid hydrocarbon. The treatment system comprises a separation device, a settling tank and a scaling device which are communicated in sequence. The treatment method comprises the following steps: 1) separating the liquid hydrocarbon-containing gas field produced water in a separation device to obtain a water-hydrocarbon mixed solution; 2) mixing the water-hydrocarbon mixture and crude oil according to a volume ratio of (3-1): 1, conveying the mixture to a settling tank, separating a crude oil liquid hydrocarbon mixture and settling water through gravity settling, and externally conveying the crude oil liquid hydrocarbon mixture through a pipeline; 3, the settling water is conveyed into a scaling device, an iron removal agent, a calcium and magnesium removal agent and a demulsifying agent are sequentially added, then precipitation reaction is carried out, and reinjection water is obtained on the upper layer. Liquid hydrocarbon can be recycled, meanwhile, the hydrocarbon content in water is reduced, the settling water is treated through a treating agent, and the requirement of oilfield reinjection water is met.

Embodiments of the present disclosure are directed towards a composition that includes a hydrocarbon mixture and at least an ethylene acrylic ester copolymer having about 10 to about 50 weight % of alkyl acrylate based on the total weight of the ethylene acrylic ester copolymer, where the ethylene acrylic ester copolymer is formed from (A) a first monomer of ethylene, (B) a second monomer selected from the group consisting of vinyl acetate, alkyl acrylic esters, alkyl (meth)acrylic esters and combinations thereof, and (C) a third monomer of carbon monoxide. The ethylene acrylic ester copolymer can optionally also include (D) propylene.

The invention belongs to the field of aromatic hydrocarbon extraction, and relates to a device and a method for separating aromatic hydrocarbon and non-aromatic hydrocarbon through pressure swing extractive distillation. The device comprises a hydrocarbon mixture feeding pipeline, a high-pressure extractive distillation tower, a non-aromatic solvent recovery tower, an aromatic solvent recovery tower and a heat exchanger, the hydrocarbon mixture feeding pipeline is sequentially connected with the heat exchanger and the middle part of the high-pressure extractive distillation tower; the high-pressure extractive distillation tower is provided with a raffinate discharging pipeline and an extract discharging pipeline; the raffinate discharge pipeline is connected with the non-aromatic solvent recovery tower, the non-aromatic solvent recovery tower is provided with a recovered solvent discharge pipeline and a non-aromatic discharge pipeline, and the recovered solvent discharge pipeline is connected with the high-pressure extractive distillation tower; the extract discharge pipeline is connected with an aromatic solvent recovery tower, the aromatic solvent recovery tower is provided with a lean solvent discharge pipeline and an aromatic discharge pipeline, and the lean solvent discharge pipeline is connected with a top tray of the high-pressure extractive distillation tower. A pressure reduction facility is arranged on a raffinate discharging pipeline of the high-pressure extractive distillation tower, and a gas phase enters the non-aromatic solvent recovery tower after being subjected to pressure reduction, so that variable-pressure operation of the front tower and the rear tower is realized. According to the invention, low-solvent-ratio extraction can be realized, and the heat exchange area of lean solvent heat extraction equipment can be reduced.

The present invention is based on the object of providing a process for reducing carbon dioxide (CO2) to carbon (C). This object is achieved according to the invention by a process for reducing carbon dioxide to carbon by reacting carbon dioxide with a hydrocarbon or hydrocarbon mixture. According to a preferred embodiment of the invention, a reaction of CO2 with methane (CH4) to form water (H2O) is provided in the form CO2 + CH4 -> 2C + 2H2O. An advantage of this embodiment of the invention can be seen in the fact that the reaction product carbon (C) is obtained in elemental form and can therefore be easily removed from the preferably gaseous reaction mixture. The process is particularly suitable for decarbonization (CCS), for example, by processing industrial exhaust gases. Numerous industries, such as the steel and cement industries, breweries, sewage treatment plants, waste incineration plants, and biogas-producing processes, emit large amounts of CO2. A biogas stream consists of approximately half methane and half CO2 and is therefore particularly suitable for the application of the process according to the invention.

Zeolitic adsorbent for the separation of hydrocarbon isomers. The present invention relates to an agglomerated zeolitic adsorbent based on faujasite-type zeolite crystals (FAU), a zeolitic adsorbent comprising barium or barium and potassium, said adsorbent having a pore distribution satisfying the following inequalities: 1) [Math 30] 2) [Math 31] in which VmaHg denotes the macroporous volume of the adsorbent measured by mercury intrusion porosimetry, VmeN2 denotes the mesoporous volume of the adsorbent measured by nitrogen adsorption, V2-3.6 corresponds to the mesoporous volume for pore sizes ranging from 2 nm to 3.6 nm, V3.6-15 corresponds to the mesoporous volume for pore sizes ranging from 3.6 nm to 15 nm, V2-3.6 is equal to [Math 32] V2-3.6 = VmeN2 - VmeHg where VmeHg denotes the mesoporous volume of the adsorbent measured by mercury intrusion porosimetry V3,6-15 is determined by the difference between the volume of mercury introduced at 15 nm and that introduced at 3.6 nm, the volumes being expressed in cm³.g⁻¹, and its preparation process. The invention also relates to the use of the zeolitic adsorbent agglomerate for the separation of hydrocarbon mixtures, as well as the process for separating hydrocarbon mixtures using said zeolitic adsorbent agglomerate.