13 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 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 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.

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 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.