21 results about "Liquid–liquid extraction" patented technology

Disclosed herein are methods for isolating dicarboxylic acids (DCAs) from about C3-C26 in carbon backbone length resulting from hydrothermal nitric acid oxidation, metal catalyzed oxidation or other oxidation means of polyethylene.

The invention relates to a method for separating alcohol mixtures with high water content using naphtha as an extraction solvent. Specifically, the present invention relates to a process for the production of biofuels, said process comprising or consisting of a step of liquid-liquid extraction of a mixture of C2-C3 / C2-C4 alcohols from a mixture of C2-C3 / C2-C4 alcohols and water with an extraction solvent, where the extraction solvent is naphtha.

The present invention relates to a method and device for separating aromatic compounds from a feed (1), the feed comprising a mixture of aromatic and non-aromatic compounds, wherein aromatic compounds are extracted from the feed (1) in a liquid-liquid extractor (T1) supplied with a solvent (2) in order to produce at least one extract (4) concentrated in aromatic compounds relative to the feed (1), and a raffinate (3) concentrated in non-aromatic compounds relative to the composition of the feed (1); and wherein the liquid-liquid extractor (T1) is supplied with the entirety of an extract recycle (5) at one or more positions in the liquid-liquid extractor (T1) arranged between a feed point for the feed (1) and a feed point for the solvent (2).

The invention relates to a process for the liquid-liquid extraction of at least one salt of a metal chosen from the elements of the rare earth group and the actinide group from an acidic aqueous phase containing them, said process comprising in particular a step of mixing an acidic aqueous phase comprising said salt of said metal and at least one non-ionic hydrotropic agent with an organic phase comprising at least one non-ionic hydrotropic agent and at least one extracting agent. Figure for abstract: none

The present invention relates to a method for recovering a stream of one or more purified PVC polymers from a PVC-based plastic feedstock comprising one or more PVC polymers and at least two families of additives, the method using a biphasic solvent system comprising two immiscible liquid phases A and B, the method comprising: a) a dissolving step that comprises bringing the plastic feedstock into contact with a dissolving liquid consisting of phase A to obtain at least one crude polymer solution (1); b) a step of liquid-liquid extraction, in at least one zone, of the crude polymer solution (1), the liquid-liquid extraction step being carried out in the presence of a single extraction liquid (4) consisting of phase B to obtain a purified polymer solution (3) and at least one final additive stream (2) comprising the at least two families of additives; c) a polymer-solvent separation step to separate the purified polymer solution into a stream of one or more purified PVC polymers and at least one solvent fraction comprising phase A.

The present invention relates to a solvent system specific to fractionation by liquid-liquid extraction, particularly by centrifugal partition chromatography, of a PVC-based feedstock comprising a PVC polymer and at least one additive. The system comprises two non-miscible liquid phases A and B, each comprising an organic solvent or a mixture of organic solvents selected from the same list consisting of ketones, amides, azines, esters, ethers, halogenated solvents, hydrocarbons, sulfur-containing solvents, and dihydrolevoglucosenone. The partition coefficient of the PVC polymer in the solvent system (ratio of the mass concentrations of the PVC polymer dissolved in phase B and in phase A) tends towards zero, and the partition coefficient of the additive in the solvent system (ratio of the mass concentrations of the additive dissolved in phase B and in phase A) is greater than or equal to 0.05.

The present invention provides a method for the recovery of 2,3-butanediol (BDO) from an aqueous fermentation broth. The method includes directing an aqueous phase along the lumen side or the shell side of a plurality of hydrophobic hollow fibers while simultaneously directing an organic phase along the other of the lumen side or the shell side of the plurality of hollow fibers. The aqueous phase includes a fermentation broth containing BDO, water, and impurities, and the organic phase is initially composed entirely of an organic solvent, the organic solvent being immiscible in water and having an affinity for BDO. The organic solvent continuously recovers BDO from the fermentation broth, the BDO being a precursor for aviation fuels and other applications.

The present disclosure relates to calixpyrrole compounds and compositions thereof. The calixpyrrole compounds are chemical groups which are located in such a manner so as to be useful for the selective extraction of specific salts. Also provided herein are compositions and methods of use thereof.

The application belongs to the field of chemical separation method and equipment, and provides a rotating micro-reactor and a liquid-liquid extraction method.The rotating micro-reactor comprises a driving device, a rotating shaft, a centrifugal phase separation structure, a plurality of rotating discs arranged alternately and a fixed ring.The rotating shaft is composed of a rotating disc mounting section and a material conveying section.The rotating disc is horizontally arranged on the rotating disc mounting section, and the fixed ring is horizontally arranged on the inner side wall of the lower shell.The centrifugal phase separation structure is located above the lower shell and comprises a separation cylinder and an upper shell.The bottom of the separation cylinder is provided with a separation cylinder feed inlet.The lower end of the rotating shaft is connected with the driving device, and the upper end is communicated with the separation cylinder feed inlet.The rotating disc mounting section and the liquid inlet are located in the lower shell.The axis of the lower shell is perpendicular to the horizontal plane.The rotating disc, the fixed ring, the rotating shaft and the separation cylinder are coaxially arranged with the lower shell.The application can realize continuous high-efficiency mass transfer and phase separation, and reduce the industrial amplification difficulty of the micro-reactor.

A method includes receiving a source stream into a liquid-liquid extractor. The source stream includes a rich mono ethylene glycol (MEG) and a kinetic hydrate inhibitor (KHI) actives. The method also includes receiving an extraction solvent into the liquid-liquid extractor, wherein the extraction solvent has an affinity for the KHI actives. The method also includes separating the source stream into an extract stream and a raffinate stream in the liquid-liquid extractor via a liquid-liquid extraction using the extraction solvent, outputting the extract stream including the KHI actives and the extraction solvent, and outputting the raffinate stream including the rich MEG.

The present invention relates to a process for the production of 5-hydroxymethylfurfural (5-HMF) comprising, in order: a) contacting a sugar feedstock with a polar aprotic synthesis solvent and an acidic dehydration catalyst at a temperature of 30-200 DEG C and a pressure of 0.001-10 MPa to produce a synthesis effluent comprising 5-HMF; b) concentrating the 5-HMF in the synthetic effluent; c) contacting the concentrated synthetic effluent with an aqueous stream; d) liquid-liquid extraction with an organic extraction solvent, followed by step e) backwashing with an aqueous solvent to obtain an organic raffinate rich in 5-HMF and solvent. The optionally concentrated organic raffinate is then subjected to a purification step g), for example water distillation or crystallization, to obtain a 5-HMF stream, for example in the form of an aqueous 5-HMF solution or crystalline 5-HMF.

The present invention provides a method for the recovery of 2,3-butanediol (BDO) from an aqueous fermentation broth. The method includes directing an aqueous phase along the lumen side or the shell side of a plurality of hydrophobic hollow fibers while simultaneously directing an organic phase along the other of the lumen side or the shell side of the plurality of hollow fibers. The aqueous phase includes a fermentation broth containing BDO, water, and impurities, and the organic phase is initially composed entirely of an organic solvent, the organic solvent being immiscible in water and having an affinity for BDO. The organic solvent continuously recovers BDO from the fermentation broth, the BDO being a precursor for aviation fuels and other applications.

The invention relates to a method for separating alcohol mixtures with high water content using an extraction solvent. In particular, the present invention relates to a process for liquid-liquid extraction of a C2-C3 alcohol or a mixture of C2-C4 alcohols from a C2-C3 alcohol or a mixture of C2-C4 alcohols and water with an extraction solvent selected from the group consisting of isobutyraldehyde and n-pentane / dimethylacetal mixtures.

Pulsed column [1, fig. 1A] for liquid-liquid extraction, comprising a cylindrical tube [10, fig. 1A] having a longitudinal axis Z and an inside diameter and packing 20 located inside said tube, said p

The invention belongs to the field of chemical separation methods and equipment, and provides a rotary microreactor and a liquid-liquid extraction method. The rotary micro-reactor comprises a driving device, a rotary shaft, a centrifugal phase separation structure, a plurality of rotary discs and a fixed circular ring, the rotary discs and the fixed circular ring are alternately arranged, the rotary shaft is composed of a rotary disc mounting section and a material conveying section, the rotary discs are horizontally arranged on the rotary disc mounting section, and the fixed circular ring is horizontally arranged on the inner side wall of the lower shell; the centrifugal phase separation structure is located above the lower shell and comprises a separation barrel and an upper shell, and a separation barrel feeding opening is formed in the bottom of the separation barrel; the lower end of the rotating shaft is connected with the driving device, and the upper end of the rotating shaft is communicated with the separating cylinder feeding port; the rotating disc mounting section and the liquid inlet are located in the lower shell; the axis of the lower shell is perpendicular to the horizontal plane, and the rotary disc, the fixed circular ring, the rotary shaft, the separation barrel and the lower shell are coaxially arranged. According to the invention, continuous high-efficiency mass transfer and phase separation can be realized, and the industrial amplification difficulty of the microreactor is reduced.

The invention relates to a method for purifying a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, comprising the following steps: (a) providing a composition of hydrocarbon compounds comprising a plastic and / or elastomer liquefaction oil optionally mixed with biomass, said composition containing at least 1% by mass of heteroatoms, (b) a step of liquid-liquid extraction by bringing the composition provided in step (a) into contact with a solvent consisting of at least one heteroatom-free hydrocarbon compound, (c) a step of recovering a first phase and a second phase which are immiscible, the first phase containing the composition depleted in heteroatoms and the solvent, while the second phase is enriched in heteroatoms, (d) a separation step during which the solvent is separated from the rest of the first phase, forming a purified composition.

The application belongs to the technical field of palladium recovery, and particularly relates to an amino-substituted modified thioureido ionic liquid and a preparation method and application thereof, and a liquid-liquid extraction method for Pd(II). The application provides an amino-substituted modified thioureido ionic liquid, the chemical formula of the ionic liquid is shown as formula 1, the structure is that a terminal nitrogen atom of S-n-decyl thioureido cation carries a substituent group, the substituent group is selected from an amino group or a guanidino group, and an anion is bis(trifluoromethylsulfonyl)imide. By introducing an amino group or a guanidino group on a thioureido group, the ionic liquid [TSCC10][Tf2N] and [GTUC10][Tf2N] provided by the application significantly improves extraction kinetics, and can reach extraction equilibrium within 2 hours; in an equimolar concentration mixed metal ion solution and an actual waste palladium catalyst leaching solution, the extraction rate of Pd(II) is as high as 99.93% or more, while the extraction rate of coexisting base metal ions is less than 13.42%, and excellent selectivity is exhibited; the saturated extraction capacities are 212 mg / g and 195 mg / g, respectively. After multiple extraction-stripping-regeneration cycles, the ionic liquid still maintains good extraction activity. In summary, the solvent-free extraction process provided by the application is simple in operation, environmentally friendly, fast in extraction rate, high in selectivity, has a good industrial application prospect, and has significant economic and social benefits.

The invention belongs to the field of chemical separation methods and equipment, and provides a double-membrane rotating micro-channel extractor and a liquid-liquid extraction method. The double-membrane rotating micro-channel extractor comprises a driving device, a rotating shaft, a shell, a plurality of rotating discs and a plurality of fixing rings, the rotating discs are horizontally arranged on the rotating shaft, the fixing rings are horizontally arranged on the inner side wall of the shell, the driving device is located above the shell, the upper end of the rotating shaft is connected with the driving device, and the lower end of the rotating shaft is connected with the shell. The section, provided with the rotating discs, of the rotating shaft is located in the shell, the rotating discs and the fixing circular rings are alternately arranged, and the axes of the rotating discs, the fixing circular rings and the rotating shaft coincide with the axis of the shell. And gaps are formed between the fixed circular rings and the rotating shaft, between the rotating discs and the inner side wall of the shell, and between the adjacent rotating discs and fixed circular rings. According to the invention, mass transfer in the liquid-liquid extraction process can be effectively enhanced, continuous in-situ phase splitting is realized, and the industrial amplification difficulty of the microreactor is reduced.

The invention provides a method for synthesizing glycerol carbonate through liquid-liquid extraction reinforced glycerol-CO2 carbonylation, which comprises the following steps: S1, mixing glycerol, a catalyst, an extracting agent and a solvent to obtain a reaction system; the extracting agent is one or a mixture of more of cyclohexanone, 2-pentanone, 4-methyl-2-pentanone, ethyl acetate and 2-butanone; s2, replacing air in the reaction system with CO2, and then introducing CO2; s3, heating the reaction system for reaction; and S4, after the reaction is finished, obtaining a mixture containing glycerol carbonate. According to the method, the yield of the target product glycerol carbonate is enhanced and improved through liquid-liquid extraction, and the extraction agent is not consumed and can be recycled, so that the product separation difficulty is simplified.

The invention relates to a pulsed column (1) for liquid-liquid extraction comprising a cylindrical tube (10) with a longitudinal axis (Z) and an internal diameter (D0) and a packing (20) located inside the tube (10). The packing (20) comprises a rod (30) extending along the longitudinal axis (Z) and a plurality of truncated discs (40) fixed and distributed regularly along the rod (30) with a spacing (E) and each extending in a transverse plane (P) perpendicular to the rod (30), each of the truncated discs (40) having as its perimeter in the transverse plane (P) two arcs of a circle of radius (R) connected by two identical parallel rectilinear edges (41) spaced apart by a distance (D), any two of the adjacent truncated discs (40) being oriented relative to each other in the transverse plane (P) by a non-zero orientation angle (θ). Abstract figure: Figure 1A