Method of removing sulfur oxides from ozonized petroleum or gas-condensate feedstock

FIELD: oil and gas industry.

SUBSTANCE: method of removing sulphur oxides from ozonized petroleum or gas-condensate feedstock is carried out by rectification under vacuum with residual pressure of 58.0-95.5 kPa, in the presence of a stripping agent supplied to a column in the amount of 0.8 -2.5% moll. per feedstock, wherein exhaust of vacuum-creating booster steam jet pump is condensed, cooled and the resulting water steam condensate is used for absorption of sulphur oxides.

EFFECT: increased efficiency of sulphur oxide separation from ozonized hydrocarbon mixture by rectification method under vacuum.

1 tbl, 4 ex

 



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: invention relates to method of fuel oil refining including its heating in the furnace and supply to vacuum column with off-take by side streams of vacuum distillates and tar from bottom of the vacuum column, using circulating reflux and supply to column bottom of the evaporating agent and part of cooled tar, condensation of light hydrocarbon vapours removed from top of the vacuum column, and with separation of uncondensable gases and vapours, and condensate of hydrocarbon vapours. Light hydrocarbon vapours from top of the vacuum column are supplied to the hydraulic ejector, are ejected by the work liquid, and then are supplied to ejecting agent tank, where fresh ejecting agent (make-up) is also supplied, part of liquid from bottom of the ejecting agent tank is cooled and used as work liquid, another part containing condensate of hydrocarbon vapours is mixed with part of light vacuum distillate, and after heating is supplied to bottom of the vacuum column as evaporating agent or to evaporator, from its top the vapours are supplied to bottom of the vacuum column as evaporating agent, and liquid from bottom is supplied to the ejecting agent tank together with make-up, at that above the zone of heated fuel oil supply the heavy vacuum distillate is removed from the column and is mixed with fuel oil before its heating in the furnace.

EFFECT: increased removal of vacuum distillates and reduced degree if fuel oil decompounding in the furnace, reduced creating of acid water drains.

1 dwg, 2 tbl

Oil refining method // 2548040

FIELD: oil-and-gas industry.

SUBSTANCE: method comprises the passing heated raw materials through heat exchangers and a furnace into a complex topping unit fitted with lateral stripping sections with supply to the bottom of sections and a complex topping unit of heated flows, withdrawal from the top of the complex topping unit of light petrol fraction and its supply after heating into a stabiliser tower with release of gas and stable light petrol fraction, side streams through stripping sections - heavy petrol, kerosene and diesel fractions and from the bottom of the complex topping unit of fuel oil, supply of fuel oil after heating in the furnace into the vacuum column with lateral withdrawal of diesel fraction, light vacuum gasoil using a circulating irrigation and from the bottom of the vacuum column - tar, using the circulating irrigation in the complex topping unit and supply of the heated flow into the bottom of the vacuum column, meanwhile the raw materials after heating in heat exchangers are separated into two flows, the flow, larger by quantity, is heated in the furnace and is supplied to the feeding zone of the complex topping unit, and smaller without heating is supplied between the supply of the bigger flow and withdrawal of diesel fraction, the complex topping unit contains two circulating irrigations, the heated flows are supplied to the bottom of stripping sections which are vapours after evaporation of light hydrocarbons from the residues of the stripping sections, into the bottom of the complex topping unit - heated gas from the stabilisation column where the reflux is selected, from the first plate of the vacuum column located above the supply of raw materials the heavy vacuum gasoil is withdrawn, it is used for heating of a part of diesel fraction of the vacuum column and supplied for mixing with fuel oil before its heating in the furnace, the diesel fraction heated by heavy vacuum gasoil is additionally heated in the furnace and supplied as a heated flow into the bottom of the vacuum column, lateral withdrawal of diesel fraction of the vacuum column is taken as a top circulating irrigation, and the light vacuum gasoil - as a lower one.

EFFECT: invention allows to lower energy consumption and to avoid formation of drains of acidic water, to increase withdrawal of vacuum gasoil and to decrease the level of decomposition of fuel oil in the furnace.

1 tbl, 1 dwg

Oil refining method // 2548038

FIELD: oil-and-gas industry.

SUBSTANCE: method comprises the passing of heated raw materials through heat exchangers and a furnace into a complex topping unit fitted with lateral stripping sections with supply into the bottom of sections and a complex topping unit of heated flows, withdrawal from the top of the complex topping unit of light petrol fraction and its supply after heating into a stabiliser tower with release of gas and stable light petrol fraction, side streams through stripping sections - heavy petrol, kerosene and diesel fractions and from the bottom of the complex topping unit of fuel oil, supply of fuel oil after heating in the furnace into the vacuum column with lateral withdrawal of diesel fraction, light vacuum gasoil using a circulating irrigation and from the bottom of the vacuum column - tar, using the circulating irrigation in the complex topping unit and supply of the heated flow into the bottom of the vacuum column, meanwhile the raw materials after heating in heat exchangers are separated into two flows, the flow, larger by quantity, is heated in the furnace and is supplied to the feeding zone of the complex topping unit, and smaller without heating is supplied between the supply of the larger flow and withdrawal of diesel fraction, the complex topping unit contains two circulating irrigations, the heated flows are supplied to the bottom of stripping sections which are vapours after evaporation of light hydrocarbons from the residues of the stripping sections, into the bottom of the complex topping unit - heated gas from the stabilisation column where the reflux is withdrawn, from the fuel oil before its heating in the furnace the light hydrocarbons are evaporated at the pressure lower than the pressure in the complex topping unit and they are supplied as heated flow into the bottom of the vacuum column, the heavy vacuum gasoil is withdrawn from the first plate of the vacuum column located above the supply of raw materials into the vacuum column and supplied for mixing with fuel oil liquid phase, after that the obtained after mixing flow is heated in the furnace and is supplied into the vacuum column as a raw material, the lateral withdrawal of diesel fraction of the vacuum column is taken as a top circulating irrigation, and the light vacuum gasoil - as a lower one.

EFFECT: invention allows to lower energy consumption and to avoid formation of drains of acidic water, to increase withdrawal of vacuum gasoil and to decrease the level of decomposition of fuel oil in the furnace.

1 dwg, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil refining industry, namely to the method of vacuum generation in petroleum distillation devices and to vacuum generating system of devices using the given method. The method of vacuum generation includes pumpdown from devices and stage compression with partial condensation of vapour-gas mixture containing gases, vapours of water and liquid hydrocarbons, using pump ejecting vacuum generation system and the circulating working fluid, partially refreshed by inflow, forcing circulation of working fluid along the circuit, comprising main, conjugate and mated parts of the circulation circuit including, at least, first jet ejector in the main part, at least, the second jet ejector and main separator under pressure preferably higher atmospheric one in the conjugate part and, at least, vacuum separator, heat exchange device and high-pressure pump in the mated part, and also containing the lines for discharge from the circulation circuit of gases, water and hot water tracing return, as balance excess of working fluid. Meanwhile the partial separate evacuation of working fluid from the main separator is performed by means of its supply to the contact device installed the vacuum separator, and the gas-vapour is supplied into jet ejectors in parallel with ejecting jet of the working fluid.

EFFECT: offered devices allow to improve performance of the vacuum generating system, increase the depth of generated vacuum or to decrease the amount of working fluid, circulating in the system.

28 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the method of the preliminary oil distillation, where during oil distillation in atmosphere and vacuum rectifiers with production of the benzene and diesel fractions, atmosphere and vacuum gasoil and tar the first and second atmosphere rectifiers are equipped with semi-dead trays, that are connected by pipelines, respectively with the second atmosphere rectifier and vacuum column ensuring creation of the additional liquid refluxing.

EFFECT: reduced power consumption for the process and rational use of heavy oil fraction removed from semi-dead tray of the second atmosphere column.

3 cl, 1 dwg, 3 tbl

FIELD: oil-and-gas industry.

SUBSTANCE: proposed unit comprises interconnected electric desalting unit including sets of heat exchangers and four electric hydrators, gasoline pre-evaporation unit including stripping column, reflux tank and refrigerator-condenser, atmospheric distiller unit including atmospheric column, reflux tank and refrigerator-condenser, gasoline stabilisation unit stabilising column, pump reflux tanks and refrigerator-condenser. Besides, this unit comprises crude oil feed pump, stripping columns, tubular furnaces, vacuum distiller column, reflux tank, refrigerator-condenser, stem ejection pump, six group of heat exchangers and after coolers. Note here that desalting unit comprises additionally two groups of heat exchangers. Note also that gasoline pre-stripping unit and atmospheric distillation unit comprise extra compressor and reducing throttle. Note here that unit compressor of gasoline pre-stripping unit is arranged between reducing unit and seventh group of heat exchangers of electric desalting unit. Aforesaid reducing throttle is arranged between refrigerator-condenser and seventh group of desalting unit heat exchangers, compressor of atmospheric distillation unit is arranged between atmospheric column and eighth group of desalting unit heat exchangers. Atmospheric distillation unit reducing throttle is arranged between refrigerator-condenser and eighth group of desalting unit heat exchangers.

EFFECT: minimised thermal head between cold and hot flows, primary power source saving.

1 dwg

Oil refining // 2525910

FIELD: oil-and-gas industry.

SUBSTANCE: heated stock is fed into partial tripping column. Gasoline fraction is extracted from column top to be used as a reflux. Still bottoms are extracted at feed of heated flow to column still. Sill residue is heated in kiln and distilled in complex atmospheric column equipped with lateral stripper sections with feed of heated flows to bottom of sections and complex atmospheric flows. Heavy gasoline fraction is extracted from complex atmospheric column top while in side-cut distillates via stripper sections extracted are kerosene, light and heavy diesel fractions and fuel oil is extracted from complex atmospheric column bottom. Fuel oil heated in the furnace is fed into vacuum column with extraction of diesel fraction, light and heavy vacuum gas oils and tar is extracted from vacuum column bottom with application of circulation irrigation in complex atmospheric and vacuum columns and with feed of evaporation agent to vacuum column bottom. Fuel oil before heating in furnace is fed to vacuum section bottom while cooled fluid is fed to top of said section. Said fluid is extracted from complex atmospheric column section located between stock feed inlet and side-cut distillate discharge into stripper of heavy diesel fraction. Vapours from vacuum section top are subjected to partial condensation. Liquid phase is directed to vacuum column, to section between bleeds of light and heavy gas oils. Vapour phase is completely condensed, heated and fed to vacuum column bottom as evaporator agent. Fluid from vacuum section bottom, after heating in furnace, is fed to vacuum column feed zone.

EFFECT: lower power and capital costs and consumption of acid waters.

1 dwg, 1 tbl

Oil refining // 2525909

FIELD: oil-and-gas industry.

SUBSTANCE: heated stock is fed into partial tripping tower. Gasoline fraction is extracted from tower top to be used as a reflux. Still bottoms are extracted at feed of heated flow to column still. Sill residue is heated in kiln and distilled in complex atmospheric column equipped with lateral stripper sections with feed of heated flows to bottom of sections and complex atmospheric flows. Heavy gasoline fraction is extracted from complex atmospheric column top while in side-cut distillates via stripper sections extracted are , kerosene, light and heavy diesel fractions and fuel oil is extracted from complex atmospheric column bottom. Fuel oil heated in the furnace is fed into vacuum column with extraction of diesel fraction, light and heavy vacuum gas oils and tar is extracted from vacuum column bottom with application of circulation irrigation in complex atmospheric and vacuum columns and with feed of evaporation agent to vacuum column bottom. Fuel oil before heating in furnace is fed to vacuum section bottom while cooled fluid is fed to top of said section. Said fluid is extracted from complex atmospheric column section located between stock feed inlet and side-cut distillate discharge into stripper of heavy diesel fraction. Vapours from vacuum section top are condensed and directed to vacuum column between bleeds of light and heavy vacuum gas oils. Fluid from vacuum section bottom, after heating in furnace, is fed to vacuum column feed zone. Light and heavy diesel fractions are obtained in vacuum column. Light diesel fraction after heating is fed to vacuum column bottom as evaporator agent.

EFFECT: lower power and capital costs and consumption of acid waters.

1 dwg, 1 tbl

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to primary processing of oil. Proposed method comprises consecutive stripping, withdrawal of atmospheric and vacuum gas oils at 200-370C in the presence evaporator. This process is realised in vortex chambers while raw stock is fed into said chambers at the height 0.5-0.7 of that of fluid ply therein.

EFFECT: lower metal input.

3 cl, 1 dwg, 1 tbl, 2 ex

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the method for integrated processing of oil-containing stock that lies in stock spraying in vacuum distillation chamber by means of opposite dispergators forming drop-feed flares, evacuation of residual stock and cumulative gaseous phase formed in result of flash distillation, fractioning of cumulative gaseous phase. Opposite dispergators are oriented vertically; before the process of flash distillation in the interpenetrating flares mechanical cracking of the stock is performed while process of the stock dispergating is combined with thermal cracking. Parameters of flash distillation process, mechanical and thermal cracking are selected depending on the target characteristics of the residual stock and received cumulative gaseous phase is subject to fractioning to at least three products.

EFFECT: improving processing efficiency for oil-containing stock.

2 dwg, 7 tbl

FIELD: oil and gas industry.

SUBSTANCE: method involves sampling and preparation of sample with thermostatting at temperature of 50-70C with simultaneous extrusion of sulphurated hydrogen and light mercaptans with inert gas or air to in-series located absorbing solutions; at that, as absorbing solution for determining sulphurated hydrogen, there used is sodium carbonate solution, and as absorbing solution for determining light mercaptans there used is sodium hydrate solution, quantitative estimation of sulphurated hydrogen and light mercaptans by method of iodimetric titration. At that, before mixture of vapours of light hydrocarbons with sulphurated hydrogen and light mercaptans, which is extruded from the sample with air or inert gas, enters in-series located absorbing solutions, it is cooled to the temperature of more than 15C to 20C.

EFFECT: improving accuracy and reliability, and speeding-up the analysis.

5 ex, 3 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to method of increasing of quality of heavy or/and extra-heavy hydrocarbon, and mainly for release and increasing of hydrocarbon quality in wastes of drilling fluids. Invention describes method of increasing heavy hydrocarbon grade, which includes the following stages: use of heavy hydrocarbon; contacting of heavy hydrocarbon with solvent in conditions of grade increasing, due to which first product is obtained, which includes mixture of hydrocarbon of increased grade and solvent, and second product which includes asphaltenic waste, water and solvent, where conditions of grade increasing include gauge pressure in range from approximately 100 to approximately 350 pounds/square inch and temperature in range from approximately 30 to approximately 100C; and supply of first product into separator for separation of hydrocarbon of increased grade from solvent.

EFFECT: invention also relates to system for increasing grade of heavy hydrocarbon.

16 cl, 4 ex, 6 tbl, 2 dwg

FIELD: petroleum processing.

SUBSTANCE: invention relates to processes of dehydration of watered petroleum products, which are formed during preparation for repairs or for change of loads in oil-loading and oil-transportation equipment. Petroleum product is preliminarily heated to temperature above water boiling temperature and applied by thin layer onto mobile surface moving it forcibly. Evaporation is effected using heat which product obtains in superheating step. Removal of product from mobile surface is also effected forcibly, after which product, if necessary, is intensively heated and sent to next evaporation step or product is discharged if its moisture content does not exceed allowed values. Dehydration process is accomplished in one, two, or more cycles, each comprising following steps: superheating, applying product onto mobile surface, spreading product across mobile surface in thin layer, and forcibly removing product from the surface. Distilled off vapors are condensed, condensate is collected and processed by a known way, while non-condensed vapors are heated and returned to distillation zone.

EFFECT: enabled dehydration of high-viscosity petroleum products (mazut, bitumen) with any initial moisture while preventing solidification thereof and "arching" during processing, which is thereby shortened as compared to conventional procedures.

5 cl, 1 dwg

FIELD: petrochemical industry; methods of production of the polyolefin bases of the synthetic oils.

SUBSTANCE: the invention is pertaining to the method of production of the polyolefin bases of the synthetic oils by cationic oligomerization of the olefinic raw and may be used in petrochemical industry. The developed method contains: the stages of preparation of the olefinic raw, preparation and batching in the reactor of the solutions and suspensions of the components of the catalytic system Al(0)-HCl-(CH3)3CCl (TBX), isomerization of alpha-olefins and oligomerizations of the highest olefins and their mixtures under action of the catalytic system Al (0)-HCl-TBX, extractions of the dead catalyst, separation of the oligomerizate for fractions and hydrogenation of the extracted fractions under action of the catalytic agent Pd (0.2 mass %)/Al2O3+NaOH. The invention ensures improvement of the stages of the developed method. For prevention of the corrosion activity of the products the method additionally contains the stage of dechlorination of the present in the oligomerizate chlorine-containing oligoolefins by the metallic aluminum, triethylaluminum, the alcoholic solutions of KOH or using the thermal dehydrochlorination of the chlorine-containing polyolefins at the presence or absence of KOH. For improvement of the technical-and-economic indexes of the method at the expense of the increase of the output of the target fractions of polyolefins with the kinematic viscosity of 2-8 centistoke at 100°C the method additionally contains the stage of the thermal depolymerization of the restrictedly consumable high-molecular polyolefins with the kinematic viscosity of 10-20 centistoke at 100°C into the target polyolefins with the kinematic viscosity of 2-8 centistoke at 100°C.

EFFECT: the invention ensures improvement of all the stages of the developed method.

1 cl, 15 tbl

FIELD: machine-building, automotive, and oil refining industries, rail transport, and agricultural sector.

SUBSTANCE: proposed installation has heat-insulating evaporator incorporating spent motor oil feeders and dewatered motor oil outlet pipe; condenser connected to evaporator and to vacuum pump; heater; tandem-connected transfer pump and heater communicating with spent motor oil feeder; installation also has tank holding original spent motor oil whose space communicates with suction pipe of gear-type transfer pump and through heated barometer tube, with dewatered motor oil outlet pipe; heater is made in the form of steam jacket of original spent motor oil tank; reheater is made in the form of tubular heat exchanger whose tube space communicates with delivery pipe of gear-type pump and tube-to-tube space, with heating steam supply; evaporator is made in the form of horizontal heated cylinder accommodating at its ends spent motor oil feeders in the form of nozzles with filtering barriers at inlet; disposed in central part of evaporator space against nozzles are oil jet deflectors whose concave surface faces nozzles; bottom part of evaporator is provided with dewatered motor oil collector provided with its outlet pipe and heated tube disposed between jet deflectors; upper end of heated tube carries oil spray trap and its bottom end is joined to condenser case enclosed by cooling jacket and accommodating cooling coil that passes through its interior along condenser axis cooling medium discharge pipe; condensed water outlet pipe running from condenser is connected to this water collecting tank communicating with vacuum pump; installation is also provided with additional heat-insulated and heated evaporator, condenser, heater, reheater, gear-type and vacuum pumps, and heated barometer tube, which are physically identical to main evaporator, condenser, heater, reheater, gear-type and vacuum pumps, heated barometer tube, and tank for collecting fuel-containing dewatered motor oil that communicates with original spent motor oil pipeline connected to delivery pipe of main gear-type pump; additional heater is made in the form of steam jacket of fuel-containing dewatered motor oil tank whose space communicates with suction pipe of additional gear-type pump; tube space of additional heater communicates with delivery pipe of additional gear-type pump and with nozzles of additional evaporator whose collector is designed to accumulate clean motor oil; additional heated barometer tube is connected to pipe delivering clean motor oil from collector and to fuel-containing dewatered oil tank; pipe designed for discharging condensed fuel from additional condenser communicates with oil collecting tank communicating with additional vacuum pump.

EFFECT: enhanced degree of cleaning spent motor oil from water and fuel; enhanced safety and economic efficiency of process.

1 cl, 3 dwg

The invention relates to a method of reducing the amount of organic acids in the crude oil

The invention relates to the field of primary oil and can be used for its purification from mechanical impurities

The invention relates to the processing of oil sludge and can be applied in the oil industry to obtain a variety of composite materials

The invention relates to reducing the viscosity of hydrocarbon by heating

The invention relates to the decomposition of naphthenic acids in crude oil

FIELD: chemistry.

SUBSTANCE: invention relates to a process for reducing the content of polycyclic aromatic hydrocarbons or PAHs in aromatic extracts which consists in oxidising the PAHs in the presence of a hemoprotein via an oxidising compound. The aromatic extract is brought into contact with the oxidising agent in a non-reactive organic solvent, then is brought into contact with the immobilised or supported hemoprotein.

EFFECT: reduction of the content of polycyclic aromatic hydrocarbons or PAHs in aromatic extracts.

19 cl, 4 dwg, 1 tbl, 4 ex

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