863 results about "Hydrogen treatment" patented technology

The present application relates to hydrogen production technology field, especially to a kind of methanol hydrogen production method, comprising the following steps: S10: methanol water is heated and vaporized to obtain methanol water vapor;S20: methanol reforming reaction obtains hydrogen mixture gas;S30: after cooling treatment to hydrogen mixture gas, through water washing tower absorption unreacted methanol water, then, adjust the relative humidity and temperature of hydrogen mixture gas;S40: hydrogen mixture gas is input into carbon dioxide absorption tower to remove carbon dioxide;S50: after removing carbon dioxide, product hydrogen is obtained and input hydrogen tank storage to supply user end.The above-mentioned methanol hydrogen production method, by methanol water vapor reforming hydrogen treatment, obtains hydrogen mixture gas.Again, hydrogen mixture gas is purified to obtain product hydrogen with very low carbon monoxide content, with raw material easy to transport, the hydrogen purity of output is high, equipment construction cost is low, and energy consumption is low and the like advantages, reach the purpose of expanding hydrogen application range.

Electrical power derived from a renewable energy source is used to perform water electrolysis to produce oxygen and hydrogen. A flue gas and heat are produced from combustion of a fuel using at least a portion of the oxygen generated by electrolysis. A feed stream including hydrocarbon oil is hydroprocessed using the generated heat and at least a portion of the hydrogen generated by electrolysis to produce a product including a saturated hydrocarbon. At least a portion of the flue gas is hydrogenated using at least a portion of the hydrogen generated by electrolysis to produce a second product stream including a hydrocarbon, an oxygenate, or both.

The utility model discloses an inerting and discharging combined safety protection device for a solid hydrogen storage tank, and belongs to the technical field of hydrogen storage and supply. The device comprises a solid hydrogen storage tank main body, a pressure and temperature sensing module, an inert gas injection system, a flameless relief device and a hydrogen treatment unit, the pressure and temperature sensing module monitors parameters in the tank in real time, when the parameters exceed a preset threshold value, the inert gas injection system injects inert gas from the lower portion of the tank body at constant pressure, the air pressure is stabilized through flow control, and meanwhile hydrogen is pumped out of an opening in the upper portion of the tank body to the processing unit; and a discharge port is formed in the side surface of the tank body and is linked with the flameless discharge device. According to the device, through the design of inerting inhibition and safe release, the potential safety hazard of overtemperature and overpressure in the solid hydrogen storage process is solved, the stability and safety of a hydrogen storage system are improved, and the device is convenient to operate and adapts to transformation of an existing solid hydrogen storage tank.

An integrated process having an ultra-low GHG footprint for converting Camelina based biomass to liquid fuels and lubricant base stocks in which a Camelina based biomass feed is converted to liquids by a multistep hydroprocessing method and the liquids are upgraded to produce premium hydrocarbon fuels and lubricants.

The invention provides a garbage pyrolysis gasification multi-stage directional regulation-gas-solid phase reforming synergistic hydrogen production treatment process which comprises the following steps: first-stage regulation: pretreatment and graded feeding: crushing, sorting, drying and catalytic coating treatment are performed on garbage through a physical-chemical directional means; second-stage regulation and control: performing low-temperature pyrolysis directional dechlorination, and performing thermochemical directional conversion on plastic and biomass garbage at 350-450 DEG C; third-stage regulation and control: gasifying and melting are coordinated and oriented, and a gas-solid phase coupling reaction is realized in double fluidized beds at 800-900 DEG C; four-stage regulation and control: multi-stage gas-solid phase reforming is carried out, and the hydrogen yield is increased through catalysis-adsorption synergistic effect in a 700 DEG C moving bed; and five-stage regulation and control: deep purification and hydrogen purification, wherein the synthesis gas is selectively oxidized by utilizing chemical looping combustion to release hydrogen with the purity being greater than or equal to 99.99%. According to the invention, the molten ash is used as a catalytic carrier, and the Fe-Ce active sites of the molten ash are utilized to synchronously realize tar cracking and synthesis gas reforming, so that the conversion rate of tar is effectively improved.

The present application relates to a kind of green olefin removal method completely replacing clay, which comprises under liquid phase continuous hydrotreating conditions, first, reforming generated oil is mixed with hydrogen through high-efficiency mixer, hydrogen is mixed with reforming generated oil intensively and quickly, and saturated hydrogen-dissolved reforming generated oil is obtained, the saturated hydrogen-dissolved reforming generated oil is sent into first hydrogenation reactor, first contact with nickel-containing catalyst, and the reaction product is then introduced into second hydrogenation reactor, and contact with noble metal-containing catalyst.Reformate is treated by olefin removal, and the product obtained mainly contains benzene, toluene, xylene and other aromatic hydrocarbons, the bromine index of which is less than 20 mgBr / 100g oil, and the loss of aromatic hydrocarbons is less than 0.1wt%.

The present invention provides a hydrogenation catalyst, and a preparation method therefor and a use thereof. The catalyst of the present invention comprises an active component and a carrier, wherein the active component is composed of Ni, Mo, and P, and the carrier is a composite oxide comprising magnesium oxide, aluminum oxide, and silicon oxide; and on the basis of the weight of the catalyst, the mass ratio of Ni to Mo in the active component is 1.1-5, preferably 1.9-2.3, and Ni is calculated as NiO and Mo is calculated as MoO3. The active component of the catalyst of the present invention contains a high content of nickel. When used for the second-stage hydrogenation of cracked gasoline, the catalyst can be suitable for treating a raw material having a higher diene content, shows relatively strong monoolefin saturation performance and desulfurization and denitrification activity, can effectively inhibit carbon deposition, and has high stability. Therefore, the catalyst of the present invention is particularly suitable for use in industrial production of the second-stage hydrogenation of cracked gasoline or a fraction thereof.

A process for improving yield of kerosene and / or diesel from a renewable feedstock involves hydrotreating a renewable feedstock and hydroisomerizing the hydrotreated liquid. The isomerized effluent is separated to produce an offgas stream, at least one fuel stream having a desired boiling point range, and a heavy fraction having a boiling point greater than the desired boiling point range. The heavy fraction is passed to a hydrocracking zone to produce a hydrocracked effluent. The hydro-cracked effluent is passed to the hydroisomerization zone.

A PEM (Proton Exchange Membrane) electrolytic bath test system relates to the technical field of proton exchange membrane electrolyzed water and comprises an electrolytic bath, a water replenishing and circulating water module, a produced gas pretreatment and analysis module, a nitrogen purging module, a condensation module, a data acquisition module, a control module and a power supply module. The water replenishing and circulating water module is provided with a water replenishing buffer branch and is used for weakening disturbance of low-temperature water to circulating water temperature during water replenishing; the produced gas pretreatment and analysis module comprises a hydrogen treatment system and an oxygen treatment system which are parallel to each other, and a dew point meter is arranged in the hydrogen treatment system and used for detecting the dew point of produced hydrogen. Through the design of the water replenishing buffer branch, the temperature of water entering the electrolytic bath is effectively stabilized; by integrating the dew-point meter, the capability of detecting the dryness of the gas produced by the electrolytic cell is expanded; the overall framework of the system is optimized, the test precision and the energy efficiency are improved, and the operation cost is reduced.

The invention discloses a method and a system for improving the bonding capacity of a titanium-based material in superplastic forming / diffusion bonding, and belongs to the field of titanium alloy material heat treatment and hot working. In order to solve the problem that in the prior art, the connection quality is reduced due to hydrogen dissipation in the high-temperature SPF / DB process of titanium hydride alloy, hydrogen is mixed into an inert gas pressure source, the environmental hydrogen partial pressure is increased to inhibit hydrogen element loss, and therefore the diffusion connection capacity is improved. The method comprises the specific steps that a titanium alloy plate is subjected to hydrogen treatment, cleaned and sprayed with a separant, then the titanium alloy plate is placed in a mold to be vacuumized, argon-hydrogen mixed gas is introduced to serve as a pressure source, and forming and connecting are completed through rapid heating and pressure maintaining; and after the process is finished, carrying out vacuum annealing in a dehydrogenation temperature range to remove hydrogen elements, and introducing argon to accelerate cooling. The hydrogen element can be effectively reserved to improve the joint quality, meanwhile, the dehydrogenation step is simplified, and the method is suitable for the field of titanium-based material hot working, especially the technical field of titanium hydride alloy superplastic forming / diffusion bonding.

The invention provides a liquid sulfur removal agent and a preparation method thereof, and belongs to the technical field of natural gas hydrogen sulfide removal treatment.The liquid sulfur removal agent comprises, by weight, 36-66% of s-triazine derivatives, 5-8% of sulfolane, 2-5% of a pH control agent, 10-12% of a stabilizer, 5-8% of a scale inhibitor, 1-2% of a bactericide and the balance deionized water; wherein the s-triazine derivative is selected from a mixture of hexahydro-1, 3, 5-triacetyl-hexahydros-triazine, 1, 3, 5-triacetyl-hexahydros-triazine and 1, 3, 5-triazinane-2, 4-diketone, and the structural formula of the s-triazine derivative is shown in the description. The liquid sulfur removal agent is high in sulfur removal efficiency, good in corrosion inhibition and sterilization performance and not prone to scaling.

The invention discloses a hydrogen trap characteristic parameter determination method based on a genetic algorithm, and relates to the technical field of hydrogen trap characteristic calculation. Placing the sample in a hydrogen filling device for hydrogen filling treatment, wherein the hydrogen concentration in the sample is saturated; transferring the sample into a heating thermal desorption device for hydrogen desorption treatment, collecting overflowed hydrogen through a mass spectrometer to obtain an actually measured TDS curve, and analyzing the category number of hydrogen traps in the material; according to the McNabb and Foster theories, in combination with an Oriani hypothesis, a calculated TDS curve is obtained; establishing an error function between the actually measured TDS curve and the calculated TDS curve; and according to the error function, a genetic algorithm is adopted to invert and solve the concentration and binding energy of various hydrogen traps. The method can accurately predict the concentration of various hydrogen traps in the material and the characteristic parameters of binding energy, and provides technical support for hydrogen embrittlement prevention design, safety evaluation and the like of steel for hydrogen energy storage and transportation equipment.

This invention discloses a method for preparing spinnable mesophase pitch. The method includes: (1) distilling catalytic oil slurry under reduced pressure at a separation temperature of 365-380℃ to separate light distillate and heavy distillate; (2) hydrogenating the light distillate from step (1), and fractionating the hydrogenated product to obtain hydrogenated light distillate II; (3) countercurrently contacting the heavy distillate from step (1) with an extraction solvent, thereby extracting the heavy distillate under supercritical conditions to obtain an extractant; (4) co-carbonizing the extractant from step (3) with the hydrogenated light distillate II from step (2) under an inert atmosphere and with a co-carbonizing agent to obtain mesophase pitch. This invention allows for more precise control of the utilization of catalytic oil slurry raw materials, improves the raw material utilization rate, and increases the yield and broad-spectrum mesophase pitch content of spinnable mesophase pitch.

Systems and methods are provided for co-processing plastic waste in a coker as part of an integrated refinery environment that produces kerosene, jet fuel, and / or jet fuel blending components as a product. The co-processing can be performed in a fluidized coker, a delayed coker, or a combination of fluidized cokers and delayed cokers. After coking, hydroprocessing can be performed on one or more portions of the coker effluent that contribute to formation of the kerosene, jet fuel, and / or jet fuel blending component product(s). The hydroprocessing can be used to reduce or minimize the presence of unexpected nitrogen contaminants in the resulting kerosene, jet fuel, and / or jet fuel blending component product(s).

Memory holes and other high aspect-ratio features in 3D NAND structures may include metal liners that are etched away as part of the manufacturing process. The etch process may include a prime step performed before a main etch process is performed. The prime step may include providing a helium precursor to treat the metal in a memory hole remove residue on the surface of the metal. The prime may also include providing a hydrogen precursor to further remove residue on the surface of the metal, and providing an oxygen-containing precursor and to form an oxidized portion of the metal. The prime may further include providing a halide precursor and contacting the oxidized portion of the metal to remove the oxidized portion of the metal from the sidewall of the memory hole, and treating the metal with hydrogen to remove residual metal oxide.

The invention relates to a preparation method of quartz glass for photoetching, and belongs to the technical field of quartz glass. The preparation method comprises the following steps: S1, carrying out silicon dioxide loose body deposition by adopting VAD deposition equipment; in the deposition process, the silicon dioxide loose body does autorotation motion and revolution motion; s2, sintering the silicon dioxide loose body by adopting a sintering furnace to obtain a quartz glass ingot; s3, carrying out thermal modification treatment on the quartz glass ingot by adopting a groove sinking furnace; S4, carrying out annealing treatment on the quartz glass ingot subjected to thermal modification by adopting an annealing furnace; and S5, carrying out hydrogen permeation treatment on the annealed quartz glass by adopting a hydrogen permeation furnace to obtain the quartz glass for photoetching. According to the preparation method, the density distribution is improved through a loose body deposition procedure, the problems existing in the aspects of uniformity and defect control in a normal-pressure sintering mode are solved by regulating and controlling the dehydration and impurity removal reaction rate, and uniform distribution of hydrogen molecules is achieved through sectional type hydrogen loading.

The invention discloses a method for repairing cracks of an inner cylinder of a medium-pressure cylinder. The method comprises the following steps that firstly, construction preparation is conducted; secondly, crack arrest holes are punched before defect cleaning, then crack defects are cleaned, a U-shaped groove is ground after the defects are cleaned, and the size of the groove angle is determined according to the depth; 4, checking again before welding to confirm that the defects are cleaned up, and selecting proper welding materials and welding parameters for welding according to the material of the workpiece; and fifthly, after welding is completed, medicine residues and welding spatter are removed, and then after-heat hydrogen elimination treatment is conducted on a welding seam. According to the method, through construction preparation, defect cleaning, preheating before welding, welding and hydrogen elimination treatment after welding, the major defects of cracks of the steam turbine cylinder body are repaired, the repairing period is short, and the quality is good. High maintenance cost is saved for a power plant, power generation loss is reduced, and guarantee is provided for a unit to complete maintenance on schedule.

A method for treating mixed plastic waste, the method comprising: (I) pyrolyzing the mixed plastic waste in a pyrolysis reactor at a temperature of 250 DEG C to 700 DEG C and a pressure of 1.0 bar to 100 bar to form a pyrolysis oil; (II) optionally transferring the pyrolysis oil directly to a hydrotreating unit via a filter, and subjecting the pyrolysis oil to hydrotreating with a catalyst in the presence of hydrogen at a temperature of 250 DEG C to 700 DEG C and a pressure of 1.0 bar to 100 bar to form a hydrotreated pyrolysis oil; (III) regenerating a portion of the hydrotreated pyrolysis oil directly from the hydrotreating unit to the pyrolysis reactor.

Systems and methods for producing olefins and / or aromatics are disclosed. The methods include aquaprocessing of crude and / or heavy oils, at high severity, prior to processing in a steam cracking unit to produce ethylene and propylene at a mass ratio of propylene to ethylene (P / E) of 0.6 or higher. The systems include an aquaprocessing unit capable of being operated at high severity and a steam cracking unit capable of producing ethylene and propylene at a mass ratio of propylene to ethylene (P / E) of 0.6 or higher.

The present invention relates to the technical field of waste catalyst treatment, and discloses a waste hydrogenation catalyst treatment method, a hydrogenation catalyst, and a heavy oil and / or residual oil hydrotreatment method, the method comprises: (1) in an oxygen-containing atmosphere, carrying out carbon burning treatment on the waste hydrogenation catalyst; (2) leaching part of metal in the catalyst obtained in the step (1) by adopting an acid solution to obtain a leaching solution and a leaching residual catalyst; wherein compared with the waste hydrogenation catalyst, the leaching rate of vanadium in the leaching residual catalyst in terms of oxide is 62-94%; (3) carrying out extraction treatment on the leaching solution to obtain an extraction solution containing V < 4 + > and a raffinate; and (4) dipping the leaching residual catalyst obtained in the step (2) by adopting the raffinate, and then carrying out high-temperature activation treatment at 600-800 DEG C. The hydrogenation catalyst obtained by the treatment method is applied to the hydrotreating process of heavy oil and / or residual oil, and has relatively good demetallization performance and relatively high desulfurization activity stability.

The invention relates to a high-density solid hydrogen storage device performance test platform which comprises a hydrogen source device and a hydrogen storage device, a gas inlet pressure sensor is arranged between the hydrogen source device and the hydrogen storage device, a first electric control valve is arranged between the gas inlet pressure sensor and the hydrogen source device, and a second electric control valve is arranged between the gas inlet pressure sensor and the hydrogen storage device. An electric control pressure relief device is arranged between the first electric control valve and the second electric control valve; a vacuumizing device and a gas flow controller are arranged between the hydrogen storage device and the second electric control valve, before hydrogenation of the hydrogen storage device, if the gas inlet pressure sensor detects that the pressure in the pipeline exceeds the standard, the electric control pressure relief device is controlled to discharge excess gas, the vacuumizing device vacuumizes the hydrogen storage device, and the gas flow controller is controlled to discharge the excess gas. And the first electric control valve and the second electric control valve are both opened, and hydrotreatment of the hydrogen storage device is carried out. The performance test platform for the high-density solid hydrogen storage device realizes large-scale application of medium-capacity and high-capacity solid hydrogen storage, tests the hydrogen absorption and desorption amount of the device, and monitors flow data and the total hydrogen absorption and desorption amount.

The invention relates to the technical field of X oil recovery, and discloses a method for preparing cyclohexanol from a byproduct X oil in a cyclohexanone production process by a hydration method. The method comprises the following steps: (1) in the presence of hydrogen, introducing mixed reaction oil containing X oil and an organic solvent into a fixed bed reactor filled with a hydrogenation catalyst, and carrying out hydrotreatment to obtain a hydrotreatment effluent; (2) introducing the hydrotreating effluent into a desolventizing tower for first separation to obtain hydrogenated X oil and an organic solvent which can be recycled to the step (1); and (3) introducing the hydrogenated X oil into a cyclohexanol recovery tower for secondary separation to obtain gas-phase cyclohexanol and heavy X oil. According to the method provided by the invention, phenol in the X oil can be hydrogenated into cyclohexanol, efficient separation is carried out, effective utilization of phenol in the X oil is realized, and material loss in the production process is reduced.

The invention provides a repairing method suitable for an engine case connecting bolt. The method comprises the following steps that S1, chemical stripping and fine treatment are conducted on the connecting bolt, an old plating layer on the surface of the connecting bolt is removed, and the surface of the connecting bolt is evenly coarsened; s2, a nitric acid-phosphoric acid binary acid system is adopted to conduct soaking treatment on the connecting bolt treated in the step S1 at the normal temperature, and a passive film on the surface of the connecting bolt is removed; s3, the connecting bolt treated in the step S2 is subjected to chemical nickel plating; and S4, the connecting bolt treated in the step S3 is subjected to hot water stabilization and dehydrogenation treatment, and the repaired connecting bolt is obtained. The invention provides a set of process from old plating layer removal, passive film removal and chemical nickel plating to hydrogen brittleness avoidance, so that the whole repair process is highly controllable, the product quality is stable and repeatable, and the problem of batch scrapping caused by batch difference and process uncontrollability in the prior art is solved.

The utility model belongs to the technical field of water dispensers, and particularly relates to a novel water dispenser structure which comprises a main body, a raw water tank arranged on the back of the main body, a water outlet part arranged on the front face of the main body, a pure water kettle arranged on one side of the water outlet part and capable of being pulled, and a water receiving box arranged below the water outlet part. A filtering mechanism, a liquid level detection module, a hydrogen-rich mechanism and a heating module are arranged on the main body; the filtering mechanism is used for filtering raw water in the raw water tank; the liquid level detection module is used for monitoring and controlling the liquid level of the filtered purified water stored in the pure water kettle; the hydrogen enrichment mechanism is used for hydrotreating pure water in the pure water kettle; the heating module is used for heating hydrogen-rich water subjected to hydrotreatment, raw water is filtered into purified water through the filtering mechanism, hydrogen-rich treatment is conducted on the purified water through the hydrogen-rich mechanism, water in the water dispenser forms hydrogen-rich water, the water dispenser integrates filtering, hydrogen-rich treatment and heating, and the requirement of a user for pure and healthy drinking water is met.

The invention discloses a method for producing marine fuel oil. The method comprises the following steps: a residual oil raw material and hydrogen sequentially enter a first hydrotreating reactor to an (N-1)-th hydrotreating reactor for reaction, an obtained product, solid-removed oil slurry and optional catalytic diesel oil enter an Nth hydrotreating reactor to be in contact with a hydrogenation catalyst for reaction, and hydrogenated diesel oil and hydrogenated heavy oil are obtained, wherein a portion of the hydrogenated diesel oil is used as a first hydrotreating reactor feed; one part of the hydrogenated heavy oil enters a catalytic cracking unit for reaction to obtain catalytic diesel oil and catalytic slurry oil; and blending the obtained hydrogenated heavy oil with optional solid-removed oil slurry, optional catalytic diesel oil and optional hydrogenated diesel oil to prepare the marine fuel oil. According to the method disclosed by the invention, high-quality ship fuel which is low in cost and can meet indexes can be produced, and the problems that the overall utilization efficiency of a catalyst is low and the operation period of a device is restricted due to the fact that solid-removed oil slurry, catalytic diesel oil and the like are conventionally mixed at the inlet of the first reactor can be solved.

The invention discloses a preparation method of a hydrogen-responsive composite multilayer magnesium-based film surface self-wrinkle pattern. The preparation method comprises the following steps: A, preparing a polymer elastic layer on the surface of a supporting substrate; b, depositing a plurality of layers of metal-based films on the polymer elastic layer by adopting a magnetron sputtering method; and C, exposing the prepared sample in a hydrogen-containing atmosphere, and forming a wrinkle pattern of which the recognizable size is in a range of 10nm-1000mu m on the surface through hydrogenation reaction at normal temperature. According to the method, the surface of the thin film can be deformed by exposing the thin film to the hydrogen-containing atmosphere environment, so that the three-dimensional wrinkle texture can be quickly realized, and the three-dimensional wrinkle morphology can be accurately regulated and controlled by adjusting the element components, sputtering time, sputtering power, working gas flow and hydrogen treatment parameters of the magnesium or magnesium alloy hydrogen-sensitive reaction film layer. The pattern features of the prepared wrinkle pattern can be recognized through characterization means such as an optical microscope, a scanning electron microscope, an atomic force microscope or a diffraction light-variable device.

The application discloses a method and device for producing bright stock, and the obtained bright stock, which comprises the following steps: (1) contacting heavy oil with a hydrogenation catalyst under the presence of hydrogen, and performing hydrogenation reaction under hydrogenation treatment conditions to obtain a hydrogenation product; (2) performing alkylation reaction of aromatics in the hydrogenation product and C10-C20 olefins in olefin oil under the presence of a strong acid catalyst and under alkylation reaction conditions to obtain an alkylation product; and (3) performing distillation separation on the alkylation product to separate and obtain a heavy fraction with a temperature greater than 500 DEG C as the bright stock product. The method provided by the application expands the raw material source of the bright stock, simplifies the process flow, and is convenient for industrial production; and the prepared bright stock product not only has high viscosity and viscosity index, but also has good low-temperature flow performance and high oxidation stability.

The invention relates to the technical field of waste mineral oil recycling, in particular to a waste mineral oil recycling process which comprises the following steps: feeding waste mineral oil into a settling tank, adding a modified PAC flocculant, stirring, standing, settling and separating; filtering the upper-layer oil phase through a ceramic membrane filter to obtain primary purified oil; feeding the oil into a flash evaporation-thin film evaporation coupling device to obtain dehydrated oil; feeding the dehydrated oil into a tubular heating furnace for heating, and feeding into a reduced pressure distillation tower to obtain rectified crude oil; extraction treatment: adding the rectified crude oil and a composite refining agent into an extraction tower, and carrying out counter-current extraction to obtain a refined solution and an extract; heating the refined liquid to enter a flash steam stripping tower to remove the residual compound refining agent, mixing the refined liquid with mixed hydrogen, and adding the mixture into a hydrogenation reactor; and purification treatment: carrying out high-temperature treatment and low-temperature treatment on the hydrotreated effluent in sequence to obtain refined base oil. According to the method, the purification efficiency of the waste mineral oil is improved, and meanwhile, unification of economical efficiency and environment friendliness is achieved through process coupling and material innovation.

The present invention relates to a process for treating a feedstock comprising plastics and / or tyres and / or solid recycled fuel pyrolysis oils containing halogenated compounds, said process comprising: a) a hydrotreating step to obtain a partially hydrotreated effluent having a reduced halogenated compound content, b) a separation step to obtain a partially hydrotreated effluent having a reduced halogenated compound content, and c) a separation step to obtain a partially hydrotreated effluent having a reduced halogenated compound content. The present invention relates to a process for the steam cracking of a petroleum feedstock fed with a partially hydrotreated effluent from step a) and an aqueous solution to obtain a gaseous effluent, an aqueous effluent and a partially hydrotreated hydrocarbon effluent, c) a steam cracking step of a petroleum feedstock wherein at least a portion of the partially hydrotreated hydrocarbon effluent is introduced as a common feedstock, the mixture of the petroleum feedstock and the partially hydrotreated hydrocarbon effluent from step b) has a halogenated compound content of less than or equal to 3 ppm by weight without first undergoing a further hydrotreating step carried out at a higher temperature and / or pressure.

The invention refers to the method for producing gasolines or aromatic compound concentrates, where three streams are used as feedstock, one of which includes hydrocarbon fraction, the second stream includes oxygenate, the third stream includes olefin-containing fraction with one or more olefins selected from the group consisting of ethylene, propylene, normal butylenes, isobutylene, in total from 10 to 50 wt %, and where three reaction zones filled with zeolite catalyst are used, with distribution of hydrocarbon fraction and oxygenate to the first reaction zone, and with olefin-containing fraction distributed over the three reaction zones, with the third stream mass fraction distributed to the final reaction zone higher than the mass fraction of the third stream distributed to each of the previous reaction zones. This method allows to increase the yield of C5+ hydrocarbons, enhance n-hexane and n-heptane conversion, reduce benzene content in the product, avoid recycling of gaseous products and decrease consumption of oxygenates. 1 independent claim and 35 dependent claims in the formula, 12 examples, 7 tables.