111 results about "Liquid fraction" patented technology

A process is provided for upgrading low value lipid feedstocks for refinery processing. The process includes (a) treating a lipid feedstock comprising at least one fatty acid with a metal oxide catalyst on an oxide support under treating conditions to produce a treated stream, wherein the treating conditions include a temperature in a range of from 400° C. to 700° C.; a pressure in a range of from 0 to 10 MPa; and a liquid hourly space velocity in a range of from 0.1 to 10 h−1; and (b) fractionating the treated stream to obtain a gaseous fraction and a liquid fraction comprising a bio-oil; wherein the bio-oil has a lower content of oxygen and impurities as compared to the lipid feedstock.

A process is provided for upgrading low value lipid feedstocks for refinery processing. The process includes (a) treating a lipid feedstock comprising at least one fatty acid with a metal oxide catalyst on an oxide support under treating conditions to produce a treated stream, wherein the treating conditions include a temperature in a range of from 400° C. to 700° C.; a pressure in a range of from 0 to 10 MPa; and a liquid hourly space velocity in a range of from 0.1 to 10 h−1; and (b) fractionating the treated stream to obtain a gaseous fraction and a liquid fraction comprising a bio-oil; wherein the bio-oil has a lower content of oxygen and impurities as compared to the lipid feedstock.

Machine (1) for treating a food product of vegetable origin comprising a treatment section (10) provided with an inlet (11) for feeding the food product of vegetable origin to be treated and at least an outlet (12) for discharging a treated product. The treatment section (10) is equipped with a fixed hollow body (20), cylindrical, or conical, shaped, and a rotor (30) substantially cylindrical shaped and having a predetermined diameter ϕr, or substantially conical shaped and having a predetermined minimum diameter ϕr. The rotor (30) is mounted within of the fixed hollow body (20), is provided with a plurality of blades (35), and is operatively connected to a motor group (80) configured to cause a rotation of the rotor (30) about a rotation axis (130) at a predetermined rotation speed vr expressed in r.p.m.. The fixed hollow body (20) has an internal surface (21) comprising a plurality of impact surfaces (24) against which the plurality of blades (35) of the rotor (30) push the treated food product for subjecting the same to a succession of collisions and to cause, this way, the containment part of the food product to be broken and the liquid fraction, or juice, which is contained in the same to exit outside. The plurality of impact surfaces (24) is connected by a plurality of connection surfaces (26), and is oriented, in such a way to define with each blade (35) of the rotor (30) a predetermined impact angle (α)..

The present invention relates to a composition comprising lithium carbonate obtained from black mass. The composition can be obtained by a process comprising (i) mixing black mass with a liquid to provide black mass slurry; (ii) converting lithium into a lithium salt in and removing graphite from the black mass slurry of step (i); (iii) separating dissolved lithium carbonate from solids in the black mass slurry of step (ii) to provide a lithium-enriched liquid fraction and a lithium-depleted solid fraction; optionally, reducing the lithium salt in the lithium-enriched liquid fraction of step (iii) to provide elementary lithium; (v) optionally, purifying the lithium salt in the lithium-enriched liquid fraction of step (iii) or the elementary lithium of step (iv); and (vi) optionally, solidifying the lithium salt of step (iii) or (v) or the elementary lithium of step (iv) or (v).

A method and system for modulating vapor and liquid fractions of a cycling liquid-vapor fluid operating within its phase transition envelope by creating forced oscillating heat transfer between liquid and vapor fractions of the cycling stream. A liquid stream segment is expansion cooled and brought into thermal communication with a vapor stream segment. The contact with the expansion-cooled liquid enables intermolecular forces to drive condensation and release condensation heat at a condensation temperature higher than the temperature of the expansion-cooled stream segment. The resulting temperature gradient enables the expansion-cooled segment held at constant volume to capture the condensation heat and isochorically vaporize into a vapor stream segment that again is forced to condense so as to form an oscillating thermal cycle within the cycling liquid-vapor fluid.

The present disclosure provides an albumin enriched PPI extraction process and albumin enriched PPI produced by the process and use of albumin enriched PPI. The albumin enriched PPI extraction process comprises steps of a) protein extraction from aqueous solution comprising pea flour, b) separation of solids from the aqueous solution, producing a protein-rich liquid fraction, and c) precipitation of protein by use of Na, Ca, or Mg salt or combination thereof, thereby producing an albumin enriched PPI.

The invention relates to a system (1) for the thermal depolymerization of plastic waste, comprising a primary reactor (2) equipped with a heating device, an inlet (3) for feeding plastic waste, an outlet (27) for discharging an aerosol mixture, and an outlet (5) for discharging the solid residue, and the first condensation unit (4), which is equipped with the first primary vessel (10) and connected to the outlet (27) for discharging the aerosol mixture and is equipped with the outlet (6) for the liquid fraction and the outlet (7) for the gaseous fraction, further comprising a secondary reactor (8) equipped with a heating device and a catalyst and connected to the first condensation unit (4) via the outlet (6) for the liquid fraction, and further comprising the second condensation unit (9) which is connected to the secondary reactor (8).wherein a siphon-like pressure barrier (26) is arranged between the primary reactor (2) and the secondary reactor (8) and is placed in the first primary vessel (10).

The utility model discloses a liquid-phase fraction collecting valve with a liquid leakage detection and overpressure alarm device, which is integrally of a box structure and specifically comprises a case, a partition plate is arranged in the case and divides the case into a dry area and a wet area, and the partition plate and the case are sealed; the liquid leakage sensor is mounted in a liquid accumulation disc in a wet area on the front side of the case body; the liquid substrate is provided with a liquid inlet, a plurality of collection ports, a waste liquid port and an expansion port; wherein the liquid inlet is located at the foremost end, the collection opening is formed behind the liquid inlet, the collection opening is normally opened behind the collection opening, the waste liquid opening is closed only in a suction mode in a collection task, and the waste liquid opening is normally opened in other working stages; the plurality of electromagnetic valves are respectively connected with the plurality of collection ports and the waste liquid port, and the opening and closing of the collection ports and the waste liquid port are controlled through power-on opening and closing; and the pressure sensor is mounted on the liquid substrate and is positioned behind the liquid inlet and in front of the collecting opening. The liquid leakage alarm device has the functions of liquid leakage detection and overpressure alarm, and the safety and the reliability of laboratory equipment can be remarkably improved.

The present disclosure provides an albumin enriched PPI extraction process and albumin enriched PPI produced by the process and use of albumin enriched PPI. The albumin enriched PPI extraction process comprises steps of a) protein extraction from aqueous solution comprising pea flour, b) separation of solids from the aqueous solution, producing a protein-rich liquid fraction, and c) precipitation of protein by use of Na, Ca, or Mg salt or combination thereof, thereby producing an albumin enriched PPI.

The invention relates to the treatment of lignocellulosic biomass: a) a pre-treatment step (2) to obtain pre-treated biomass (3), b) a first solid / liquid separation step of solid / liquid separation of the pre-treated biomass (3) obtained in step a) into a first solid fraction (7) of the pre-treated biomass and a first liquid fraction (6) comprising a compound mixture, the present invention relates to a method for preparing a biomass solid fraction (7), comprising the steps of: a) pre-treating a compound mixture comprising C5 and C6 sugars in part in monomeric form and in part in oligomeric form, c) a first enzymatic hydrolysis step (14) of a first pre-treated biomass solid fraction (7) obtained in step b) to obtain a hydrolysis product (15) in sugar form, d) a step (24) of treating the first liquid fraction (6) obtained in step b) by hydrolysis, e) a second enzymatic hydrolysis step (24) of a second pre-treated biomass solid fraction (7) obtained in step b) to obtain a hydrolysis product (15) in sugar form, and d) a third enzymatic hydrolysis step (24) of the second pre-treated biomass solid fraction (7) obtained in step b). To obtain a treated fraction enriched in monomeric form of C5 sugars and / or monomeric form of C6 sugars (26).

The present invention relates to a composition comprising lithium carbonate obtained from black mass. The composition can be obtained by a process comprising (i) mixing black mass with a liquid to provide black mass slurry; (ii) converting lithium into a lithium salt in and removing graphite from the black mass slurry of step (i); (iii) separating dissolved lithium carbonate from solids in the black mass slurry of step (ii) to provide a lithium-enriched liquid fraction and a lithium-depleted solid fraction; optionally, reducing the lithium salt in the lithium-enriched liquid fraction of step (iii) to provide elementary lithium; (v) optionally, purifying the lithium salt in the lithium-enriched liquid fraction of step (iii) or the elementary lithium of step (iv); and (vi) optionally, solidifying the lithium salt of step (iii) or (v) or the elementary lithium of step (iv) or (v).

A reaction mixture (1) is obtained by an alkoxylation reaction of a nitrogenous compound selected from ammonia and amines, with an alkylene oxide. The reaction mixture (1) contains nitrogenous alkoxylation products and unreacted nitrogenous compound. A process for purifying the reaction mixture (1) comprises the steps of (1) introducing the reaction mixture (1) into a distillation tower (101), (2) providing thermal energy to the distillation tower (101) via a bottom reboiler (102) heated by medium pressure pressurized steam (2), (3) providing additional thermal energy to the distillation tower (101) by heating and partially evaporating a liquid in a reboiler (103) heated by low pressure pressurized steam (3), and directing the heated, partially evaporated liquid (4) to the distillation tower (101), wherein the liquid is the reaction mixture (1) to be introduced into the distillation tower (101) and / or a liquid fraction (5) withdrawn from the distillation tower (101) via a sidedraw (104), (4) withdrawing an unreacted nitrogenous compound stream (6) at the top (105) of the distillation tower (101), and (5) withdrawing an alkoxylation products stream (7) at the bottom (106) of the distillation tower (101). The process can use low temperature level heat to contribute to the heating of the reaction mixture in the distillation tower.

Processes for quantitating the corrosivity of naphthenic acids in a sample comprising crude oil or a liquid fraction thereof by reacting the sample with a metal comprising iron to produce iron naphthenates that are then stabilized by a ligand. The stabilized iron naphthenates are then analyzed by mass spectrometry to accurately quantitate the percentage of total naphthenic acids in the sample that are iron-reactive naphthenic acids associated with metal corrosion.

The invention relates to a method for treating an organic effluent comprising a solid fraction and a liquid fraction, the method comprising the following steps: - digesting the organic effluent in a main anaerobic digester (6) at a temperature of between 5°C and 35°C to produce biogas, a main effluent and a main digestate; - degassing the main effluent in a main degassing module (10) to extract biogas present in dissolved form in the main effluent and produce a degassed main effluent; - biologically treating the degassed main effluent in a biological treatment unit (12) to produce a biological sludge; and - digesting the biological sludge in a secondary anaerobic digester (26) at a temperature of between 20°C and 65°C to produce biogas, a secondary effluent and a secondary digestate.

The invention discloses a method for synthesizing low-viscosity PAO from coal-based alpha-olefins. The method comprises the following steps: S1, introducing Lewis acid gas BF3 into a coal-based alpha-olefin fraction section, carrying out a complex reaction between BF3 and oxygen-containing compounds in a coal-based alpha-olefin liquid fraction section at a pressure of 0.05 to 1 MPa to form a heterogeneous system of a BF3 complex and a coal-based alpha-olefin liquid, and then separating and removing the BF3 complex in the system to obtain a deoxidized coal-based alpha-olefin fraction section; S2, adding alcohol to the deoxidized coal-based alpha-olefin fraction section to carry out a polymerization reaction; and S3, separating the polymerization reaction mixture to obtain a polymer product and a BF3 complex, removing residual BF3 from the polymer product by flash evaporation and / or steam stripping, separating BF3 gas from the BF3 complex by gas-liquid separation, and returning the BF3 gas separated from the polymer product and the BF3 complex to step S1 for reuse.

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.

Methods for separating a first material flow containing a dissolved substance are already known in which said first material flow is divided into a second material flow and a third material flow such that the third material flow has an increased concentration of the dissolved substance compared to the second material flow. In such methods, this is achieved by means of a freezing process in which the first material flow is pre-cooled in a heat exchanger and solidified in a heat pump, whereupon the ice is mechanically crushed and centrifuged, allowing the extraction of a liquid fraction containing the dissolved substance which does not integrate into the ice lattice. In such a method, the invention provides a second heat pump which only takes over the heat transfer in the region of the freezing point, meaning that its efficiency is particularly high due to the substantially constant temperature on both sides.

A process for the production of a membrane protein is provided. The process including the steps of: expressing a membrane protein in a host organism present in an aqueous medium, liberating the membrane protein from the host organism, adding a detergent solution to solubilize the membrane protein, recovering a liquid fraction of the solubilized membrane protein, subjecting the liquid fraction to chromatography to bind or retain the membrane protein on a stationary phase, and eluting the stationary phase with an elution buffer to produce the membrane protein. The process can produce relatively large amounts of membrane proteins in an efficient way without compromising the quality of the end product.

The present invention relates to a process for reusing a polymer composition comprising at least one biodegradable polyester, starch and / or additives, comprising the steps of: (1) contacting said biodegradable polymer composition with a first solvent comprising from 50 to 100% by weight of cyclopentanone, obtaining a liquid fraction comprising at least one biodegradable polyester and a solid fraction comprising insoluble starch and / or additives; (2) separating said liquid fraction comprising at least one polyester from said solid fraction; (3) at least partially removing said first solvent from said liquid fraction; (4) reusing the polyester obtained from said liquid fraction in a polymerisation or thermoplastic transformation process, thereby obtaining a biodegradable polymer composition. Biodegradable polyesters obtained by means of the said reutilisation process, biodegradable polymer compositions comprising them, and biodegradable articles obtained therefrom constitute further objects of the invention.

The present invention is intended to lower the FOS / TAC ratio of the material to be stripped, thereby enabling a higher pH of the material, and to enhance the stripping conditions of the material in an ammonia recovery unit (4) of a biogas plant having at least one ammonification reactor (1) for processing an input raw feedstock into a pretreated feedstock, and at least one biogas reactor (2) for fermenting the pretreated feedstock into biogas and a fermentation digestate, the fermentation digestate being separated into a solid fraction and a liquid fraction in a fermentation digestate separator (5). At least a portion of the separated liquid fraction is directed as a return liquid having a low FOS / TAC ratio via a return liquid conduit (10) to a pretreated feedstock blending device (12) where the return liquid is mixed with a pretreated feedstock having a higher FOS / TAC ratio, and / or to a liquid blending device (13) where the return liquid is mixed with a separated liquid from the pretreated feedstock, and this mixed material having an intermediate FOS / TAC ratio is then fed to the ammonia recovery unit (4).

Herein is described a method for the production of liquid hydrocarbon composition, comprising i) providing carbonaceous feedstock (a); ii) subjecting the carbonaceous feedstock (a) to catalytic hydroliquefaction (10) in the presence of hydrogen to obtain a product mixture comprising liquid hydrocarbons and off-gas; iii) separating (20) the liquid hydrocarbons and the off-gas to obtain a first liquid fraction (b-1) and a first gaseous fraction (c-1) iv) converting (30) in gas phase at least part of the light oxygenates comprised in the first gaseous fraction (c-1) and v) converting in the presence of water steam at least part of the carbon monoxide (CO) comprised in the first gaseous fraction (c-1) and / or produced in step iv) to carbon dioxide (CO2) and hydrogen (H2) by water gas shift reaction, to obtain a CO2 and H2 enriched first gaseous fraction (c-1e); and vi) separating (40) non-condensables from the CO2 and H2 enriched first gaseous fraction (C-1e) to obtain a second gaseous fraction (c-2) and a second liquid fraction (b-2); vii) recovering (50) at least part of H2 from the second gaseous fraction (c-2) and recirculating at least part, of the recovered H2 to step ii); viii) recovering the first liquid fraction (b-1) and / or the second liquid fraction (b-2) to provide a liquid hydrocarbon composition.

The present invention relates to a process for purifying ethylene carbonate from a crude ethylene carbonate composition, said process comprising the steps of: a) subjecting a crude composition comprising ethylene carbonate to at least one distillation step to obtain a pre-purified composition comprising at least 99.5% by weight of ethylene carbonate; and b) subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step to obtain a purified ethylene carbonate composition wherein the process is carried out in a plant comprising at least one distillation column, one vessel, at least one crystallizer and a feed line for a crude composition containing ethylene carbonate, wherein, if the apparatus comprises one distillation column, the distillation column, or, if the apparatus comprises two or more distillation columns, the first distillation column, comprising a top outlet line, a bottom outlet line and a side outlet line, wherein the at least one crystallizer comprises an inlet line for the pre-purification of the composition and an outlet line for the purification of the ethylene carbonate composition, and wherein the side outlet line of the distillation column is directly or indirectly connected to the inlet line of the at least one crystallizer for the pre-purification of the composition, wherein i) or the vessel is connected to the feed line for the crude composition containing ethylene carbonate and to an inlet line, where the inlet line is connected to a gas outlet of a first reboiler, where the first reboiler is further connected to a bottom outlet line of the distillation column, where the vessel further comprises an outlet line, where the outlet line is connected to a gas outlet of a second reboiler, where the first reboiler is further connected to a bottom outlet line of the distillation column. The outlet line leads to the inlet line of the distillation column via a second reboiler, in which a bottom fraction of the distillation column withdrawn from the distillation column via the bottom outlet line is partially evaporated in the first reboiler to obtain a gas fraction and a liquid fraction, or ii) the feed line for the crude composition containing ethylene carbonate is introduced into the distillation column, where the bottom outlet line of the distillation column leads to the vessel via a first reboiler, where the vessel comprises a gas outlet connected to the inlet line of the distillation column, where the bottom outlet line of the distillation column leads to the vessel via a second reboiler, where the gas outlet is connected to the inlet line of the distillation column. And the container comprises a liquid outlet which is connected with a pipeline leading into a second reboiler, the second reboiler comprises a gas outlet which is connected with an inlet pipeline of the distillation column, and the gas outlet is connected with a gas outlet of the distillation column. Wherein a bottom fraction of the distillation column withdrawn from the distillation column via the bottom outlet line is partially evaporated in the first reboiler, and wherein at least a portion of a gas fraction obtained in the first reboiler is recycled to the distillation column via the inlet line.

This process for treating an organic effluent comprising a solid fraction and a liquid fraction involves the following steps: - digestion of the organic effluent in a primary anaerobic digester (6) at a temperature between 5°C and 35°C to produce biogas, a primary effluent, and a primary digestate; - degassing of the primary effluent in a primary degassing module (10) to extract biogas present in dissolved form in the primary effluent and produce a degassed primary effluent; - biological treatment of the degassed primary effluent in a biological treatment unit (12) to produce a biological sludge; and - digestion of the biological sludge in a secondary anaerobic digester (26) at a temperature between 20°C and 65°C to produce biogas, a secondary effluent, and a secondary digestate. Figure for the abstract: Figure 1

The invention relates to a method for processing a solid material comprising asbestos fibres, comprising the following steps: - grinding the solid material, - bringing the solid material into contact with an aqueous acid solution, resulting in at least some of the asbestos fibres being dissolved, - separating the liquid (5) and solid (4) fractions of the products resulting from the dissolving process. This method is characterised in that it further comprises the following steps: - diffusion dialysis of the liquid fraction (5) in order to produce a regenerated aqueous acid solution (9), - using the regenerated aqueous acid solution (9) in the step of bringing the ground solid material into contact with an aqueous acid solution. The invention also relates to a plant for carrying out the method according to the invention.

A process for recovering propane from a hydrocarbon stream including cooling a feed gas, separating the feed gas into a vapor and a liquid, expanding the vapor to produce a feed gas, feeding the feed gas to an absorber and recovering an absorber bottoms product, an absorber liquid draw, and an absorber overheads fraction; feeding the absorber bottoms product to a deethanizer and producing a deethanizer liquid fraction comprising propane and heavier components and a deethanizer overhead vapor fraction comprising ethane and lighter components. The absorber liquid draw, absorber overheads fraction, and deethanizer overhead vapor fraction are brought into indirect heat exchange to produce an absorber reboil stream and to partially condense the deethanizer overheads vapor product.

The preparation method comprises the following steps: putting tallow into a reactor, heating to 330-370 DEG C in a low-oxygen environment, keeping for 80-140 minutes, carrying out thermal cracking reaction, controlling the heating voltage to be 150V and the stirring speed to be 300r / min during the period, condensing gas generated in the reaction process, and collecting thermal cracking liquid fraction, so as to obtain the tallow-flavor concentrate. And cooling after the reaction is completed, and carrying out purification treatment to obtain the tallow-flavor concentrate. According to the method, key parameters (including the reaction temperature, the pressure condition, the heating rate and the retention time) of the thermal cracking reaction are accurately regulated and controlled, so that the yield of the organic liquid product is remarkably improved, the composition of the components is optimized, and the production efficiency is high. According to the process improvement, the selectivity of the target product is improved, and a quality foundation is laid for subsequent application.

A method for measuring the state of charge of a phase change material thermal energy storage system and optimizing the system therewith, comprising: propagating a wave by at least a majority of the phase change material along a thermal gradient of the phase change material thermal energy storage system, where a property of the wave depends on the medium by which it propagates; detecting an outgoing wave after it has propagated along the thermal gradient by at least a majority of the phase change material; determining a wave parameter of the outgoing wave, wherein the wave parameter is related to the liquid fraction of the phase change material; calculating a ratio between the phase change material in a liquid state and the phase change material in a solid state using the wave parameter related to the liquid fraction; the calculated ratio is used to assess the state of charge of the phase change material thermal energy storage system upon propagation of the outgoing wave.

A method for preparing a filtered beverage includes filtering a raw beverage using a cross-flow ultrafiltration device to produce a solids fraction and a liquid fraction; heating the solids fraction to a temperature of 60° C. or greater to produce a pasteurized solids fraction; microfiltering the liquid fraction through a microfilter having a size cut-off of 1 μm or smaller to produce a microfiltered liquid fraction; and combining the pasteurized solids fraction and the microfiltered liquid fraction to result in the filtered beverage.

The invention relates to a method for treating wastewater in a wastewater treatment plant (2), the method comprising: • - a step of biological treatment of wastewater in an activated sludge bioreactor (4), • - a step of transferring mixed liquor from the bioreactor (4) to a device (6) for separating the solids and liquids from the mixed liquor, the transfer being carried out via a hydraulic circuit (8) connecting the bioreactor (4) to the device (6) for separating the solids and liquids, and • - a step of separating the solids and liquids from the mixed liquor in the separation device (6), characterized in that it comprises a step of introducing ozone into the hydraulic circuit (8), the method comprising an additional treatment step downstream of the step of separating the solids and liquids, wherein the step of introducing ozone into the hydraulic circuit (8) comprises the following steps: - collecting a liquid fraction at the outlet of the separation step and / or at the outlet of an additional treatment step, - passing the liquid fraction into at least one gas / liquid mixing member, for example a hydroejector, and enriching the liquid fraction by injecting gaseous ozone into the gas / liquid mixing member.

The present invention relates to a method for purifying ethylene carbonate from a crude ethylene carbonate composition, and this method is a) A step of subjecting a crude composition containing ethylene carbonate to at least one distillation step to obtain a pre-purified composition containing at least 99.5% by weight of ethylene carbonate, b) A step of subjecting the pre-purified composition obtained in step a) to at least one melt crystallization step to obtain a purified ethylene carbonate composition. Includes, This method is carried out in a plant comprising at least one distillation column, one vessel, at least one crystallizer, and a supply line for a crude composition containing ethylene carbonate, wherein if the plant comprises one distillation column, the distillation column, or if the plant comprises two or more distillation columns, the first distillation column, comprises a top discharge line, a bottom discharge line, and a side discharge line, and at least one crystallizer comprises an inflow line for a pre-purified composition and a discharge line for the purified ethylene carbonate composition, and the side discharge line of the distillation column is directly or indirectly connected to the inflow line for the pre-purified composition of at least one crystallizer. i) The vessel is connected to a supply line and an inlet line for a crude composition containing ethylene carbonate, the inlet line being connected to the gas outlet of a first reboiler, the first reboiler being further connected to a bottom discharge line of a distillation column, the vessel further comprising a discharge line leading to the inlet line of the distillation column via a second reboiler, the bottom fraction of the distillation column being taken out of the distillation column via the bottom discharge line being partially evaporated in the first reboiler to obtain a gaseous fraction and a liquid fraction, or, ii) A feed line for the crude composition containing ethylene carbonate leads to a distillation column, the bottom discharge line of the distillation column leads to a vessel via a first reboiler, the vessel has a gas outlet connected to the inlet line of the distillation column, the vessel has a liquid outlet connected to a line leading to a second reboiler, the second reboiler has a gas outlet connected to the inlet line of the distillation column, the bottom fraction of the distillation column taken out of the distillation column via the bottom discharge line is partially evaporated in the first reboiler, and at least a portion of the gaseous fraction obtained in the first reboiler is recirculated into the distillation column via the inlet line.