38 results about "Anti solvent" patented technology

The invention relates to the technical field of dendrobium officinale processing, and particularly discloses a method for realizing high value-added conversion of dendrobium officinale alkaloid based on efficient extraction. The method for realizing high value-added conversion of dendrobium officinale alkaloid based on efficient extraction comprises the following steps: S1, pretreatment and activation of raw materials: crushing dried dendrobium officinale stalks to 60-100 meshes to obtain dendrobium powder; mixing the dendrobium nobile powder with an activating agent aqueous solution to obtain activated wet dendrobium nobile powder; s2, deep eutectic solvent synergistic microwave extraction; s3, precipitation and enrichment of an anti-solvent; s4, cleaning and drying the precipitate; s5, preparing alkaloid nanoparticles; and S6, preparing the functional health-care product preparation. As a functional dietary supplement, the dendrobium officinale alkaloid solid beverage tablet or capsule provided by the invention can be used for daily health care, and has the advantages of high bioavailability, strong intestinal synergistic regulation function and good physical stability.

This application discloses a method for preparing ultra-high purity citric acid monohydrate based on supercritical CO2, belonging to the field of citric acid preparation technology. The method includes the following steps: dissolving citric acid monohydrate in an organic solvent to prepare a citric acid solution; spraying the citric acid solution into a supercritical CO2 environment to crystallize the citric acid using the supercritical anti-solvent effect; performing dynamic washing with pure supercritical CO2; and obtaining ultra-high purity citric acid monohydrate crystals after depressurization and drying. The citric acid monohydrate product prepared by this method has high purity, high light transmittance, low total metal ion content, controllable crystal habit, and low organic solvent residue, meeting the stringent requirements of high-end applications such as electronic and pharmaceutical grades.

The application provides a bidentate phosphite polymer, a preparation method and application thereof, and a method for olefin carbonyl synthesis reaction. The bidentate phosphite polymer provided by the application is shown in formula (I) and is copolymerized by a specific bidentate phosphite ligand and 2-vinyl naphthalene. The bidentate phosphite polymer can be used in catalyzing the olefin carbonyl synthesis reaction, can not only ensure the catalytic performance of the olefin carbonyl synthesis reaction, but also can improve the solvent swelling resistance of the polymer, thereby being beneficial to ensuring the catalyst form stability and being beneficial to the stable production of aldehydes synthesized by the olefin carbonyl synthesis.

The invention belongs to the technical field of functional food and active substance delivery, and relates to EGCG (epigallocatechin gallate) loaded protein-polysaccharide ternary composite nanoparticles and a preparation method thereof. Zein is used as carrier protein, Arabic gum is used as stable polysaccharide, and an anti-solvent precipitation method is combined with ultrasonic treatment to prepare the composite nanoparticles. The preparation method specifically comprises the following steps: dissolving zein in an ethanol water solution to form an organic phase, dissolving Arabic gum in a water phase, adding the water phase into the organic phase under a stirring condition, removing ethanol to obtain a zein-Arabic gum binary composite nanoparticle dispersion liquid, introducing EGCG, and carrying out ultrasonic-assisted loading and drying to obtain a target product. The encapsulation efficiency of the active substance is improved through the ultrasonic-anti-solvent synergistic effect, the thermal stability and storage stability of the system are improved, and the method is simple, good in repeatability and suitable for delivery of food-grade active ingredients.

The invention is suitable for the technical field of intelligent testing, and provides an automatic testing method and system based on a water-alcohol-resistant solution, and the method comprises the steps: firstly responding to a water-alcohol-resistant solution test completion instruction, and obtaining first real-time index information and second real-time index information of a to-be-detected textile sample in real time; and according to the first real-time index information and the second real-time index information, water-alcohol-resistant effect evaluation information is effectively generated. According to the application, the water-alcohol solution resistance of various different fabrics can be accurately tested, so that the performance of the fabrics in contact with water and alcohol can be deeply known, a scientific basis can be provided for design and improvement of textiles and related products, experimental errors can be greatly reduced, and the experimental efficiency is improved. The stability and repeatability of test data are ensured, the optimization of the anti-solvent performance of the fabric is promoted, and the requirements of the market on high-quality durable textiles are met.

The application discloses a kind of preparation methods of lead-free environmental protection Cs2TiBr6 double perovskite film, it includes the following steps: CsBr powder and TiBr4 Powder are added to beaker equipped with gamma-butyrolactone solvent and magnetically stirred to be completely dissolved, then slowly add anhydrous acetonitrile as anti-solvent and constant temperature heating is placed on heating table, after seed microcrystal precipitates, pour out solution, use acetone to flush seed microcrystal after, and dry after standing;Seed microcrystal, CsBr powder and TiBr4 Powder are added to N, N-dimethylformamide solvent, and be loaded into centrifugal tube and centrifuged, pour out supernatant after centrifugation and the precipitate is dried, obtain Cs2TiBr6 microcrystal;Cs2TiBr6 microcrystal is added to the mixed solution of cyclohexane and isopropyl alcohol with certain mass ratio, and magnetically stirred to make microcrystal fully dispersed, obtain Cs2TiBr6 precursor solution;Cs2TiBr6 precursor solution is added dropwise to substrate and spin-coated, then the substrate is placed on heating table and annealed, to obtain Cs2TiBr6 film.The advantages are that, compared with existing film preparation technology, 1) no need of thermal evaporation coating machine and double source co-evaporation process, low cost and simple process;2) will not corrode substrate material;3) the thickness of prepared Cs2TiBr6 film is 8-10 μm, suitable for use in optoelectronic devices.

The application belongs to the field of organic photoelectric functional materials and devices, and particularly relates to a low-temperature cross-linking hole transport material and a synthesis method and application thereof. Two low-temperature cross-linking hole transport materials are successfully prepared by taking 9H-carbazole and 2,7-dibromo-9-butyl-9H-carbazole or 3,6-dibromo-9-butyl-9H-carbazole as raw materials. The two cross-linking hole transport materials have good thermal stability and solvent resistance and low cross-linking temperature. The two materials are applied to a QLED device hole transport layer, which significantly improves the current injection imbalance problem, improves the QLED efficiency, protects the original high charge transport performance of the hole injection layer, and promotes the rapid injection of holes.

This invention discloses a bismaleimide-modified polyaryletherketone (PAK) composition, its preparation method, and its applications, belonging to the technical field of polymer materials and high-temperature insulating coatings. The composition comprises a PAK polymer, a bismaleimide crosslinking agent, and a free radical catalyst. The PAK polymer backbone or side chains contain cyano functional groups that participate in the crosslinking reaction, and the bismaleimide crosslinking agent contains active maleimide functional groups, which react with the cyano groups of the PAK polymer backbone to form a slightly crosslinked network structure. The novel slightly crosslinked network polymer film prepared by this invention exhibits strong solvent resistance, excellent material processing properties, and superior insulation properties at high temperatures.

The embodiment of the application relates to a method for preparing perovskite quantum dots assisted by supercritical carbon dioxide, and belongs to the technical field of perovskite quantum dots. The method solves the problems of complex process of hot injection method, large amount of anti-solvent required by ligand assisted precipitation method and difficult size control. The specific steps include: 1) dissolving lead halide and ligand 1 in polar solvent 1 to form precursor solution A; 2) dissolving cesium halide and ligand 2 in polar solvent 2 to form solution B; 3) premixing solution A and supercritical carbon dioxide to be homogeneous; 4) adding anti-solvent 3 into the reaction kettle and introducing the homogeneous phase of solution A and supercritical carbon dioxide; 5) rapidly injecting solution B for reaction, and releasing pressure after crystal nucleation and growth; 6) collecting and purifying the product. The method is green and efficient, and the prepared perovskite quantum dots are suitable for the fields of optoelectronic devices, display and lighting, etc.

The invention relates to the technical field of inorganic salt purification, and discloses high-purity ammonium sulfate and a preparation process thereof.The preparation process includes the following steps that firstly, a magnetic response macrocyclic ether complexing agent is added into an ammonium sulfate solution to be purified, the complexing agent can specifically capture impurities such as potassium ions, and a stable complex with magnetic responsiveness is formed; then, selectively crystallizing and separating out the target product ammonium sulfate under a mild condition by a gas-phase anti-solvent crystallization method, and meanwhile, effectively repelling a large-volume impurity complex into a mother solution. The key step is that obtained solid-liquid mixed crystal mush is introduced into a gradient magnetic field for enhanced separation. Through creative integration of molecular recognition, phase equilibrium engineering and a magnetochemical separation technology, the limitation of a co-crystallization effect is fundamentally broken through, and ultra-high-purity ammonium sulfate with extremely low impurity content can be prepared in an efficient and environment-friendly manner.

The application belongs to the technical field of perovskite quantum dot preparation, and particularly relates to a method for preparing perovskite quantum dots by using nano transient precipitation. The method comprises the following steps: dispersing A-site cation halide, B-site metal ion halide and a ligand of ABX3 type perovskite quantum dots in a polar solvent to obtain a precursor solution; and mixing the precursor solution and a non-polar anti-solvent by jet flow mixing to induce turbulent mixing, and obtaining the perovskite quantum dots after stopping. The preparation method provided by the application can be carried out at normal temperature and pressure, without the need for high-temperature heating and inert atmosphere protection, thereby avoiding the harsh reaction conditions of the hot injection method, and greatly reducing the process complexity and energy consumption cost. The jet flow mixing technology is used to realize efficient mixing in milliseconds, and the mixing time is shortened by 2-3 orders of magnitude compared with the traditional method, so that the transient uniform supersaturation of the precursor is ensured, thereby obtaining perovskite quantum dot products with narrow particle size distribution and excellent optical performance.

The invention discloses a circular polarization organic laser material and a preparation method and application thereof, and the preparation method of the circular polarization organic laser material comprises the following steps: taking chiral amine, rare earth chloride and hydrochloric acid as raw materials, placing the raw materials in a solvent, and heating for reaction to obtain a precursor solution; after drying the precursor solution, dissolving again to obtain a transparent solution; and putting the open container filled with the transparent solution into a closed container filled with an anti-solvent, and growing the zero-dimensional perovskite structure luminescent material A4BX7 single crystal by utilizing the diffusion of the anti-solvent. The chiral ligand is introduced into the hybrid perovskite, a chiral environment is successfully introduced into an inorganic perovskite system, chiral transfer is realized, and the prepared circular polarization organic laser material has good circular polarization organic laser properties and high fluorescence quantum yield.

The invention relates to the technical field of nylon 66 salt preparation, and provides a nylon 66 salt preparation method based on a microchannel reactor, which comprises the following steps: preparing an adipic acid suspension and a hexamethylenediamine solution, and heating the adipic acid suspension and the hexamethylenediamine solution to 50 DEG C; introducing the nylon 66 salt solution and the nylon 66 salt solution into a micro-channel reactor for neutralization reaction to obtain a nylon 66 salt solution; the micro-channel reactor comprises a constant-temperature pipe, and a spiral channel pipe is sleeved in the constant-temperature pipe; the method comprises the following steps: introducing a nylon 66 salt solution and an anti-solvent into a clash mixer to form a mixed solution in the mixer; introducing the mixed solution into a micro-channel crystallizer, and gradually crystallizing to form salt crystal slurry; and separating and drying the nylon 66 salt crystal slurry to obtain solid nylon 66 salt. Therefore, through the micro-channel reactor, the clash mixer and the micro-channel crystallizer, the contact area of reactants is increased, the reaction rate is further increased, and the water consumption and the evaporation energy consumption are effectively reduced. The production cost is reduced, and the production efficiency is improved.

The invention discloses a crosslinkable hole transport polymer and application thereof in preparation of a photoelectric device. The polymer has a triarylamine unit, and a group with chemical reaction activity is introduced to a side chain of the polymer; chemically reactive groups of styrene, benzocyclobutene and substituents or derivatives thereof; the cross-linkable hole transport polymer can be cross-linked and cured under the mild conditions of heat, light, an initiator and the like, and then has good solvent resistance, another layer of film can be prepared on the cross-linkable hole transport polymer through solution processing, and a multi-layer solution processing device is achieved. The cross-linkable hole transport polymer also has high optical transparency, has large potential as a hole transport polymer, and can realize different energy levels and carrier mobility by adjusting the content of a polymerization unit. The method can be used for preparing the hole injection layer of the photoelectric device.

The invention relates to a method for extracting total flavonoids of litsea coreana, which comprises the following steps: step 1, pretreatment: crushing and sieving dried litsea coreana leaves to obtain litsea coreana powder; step 2, enzymolysis: adding the litsea coreana powder into a buffer solution, then adding a compound enzyme, and carrying out enzymolysis treatment; step 3, DES extraction: adding a deep eutectic solvent into the material subjected to enzymolysis for extraction, and centrifuging to obtain an extracting solution; and step 4, purification: adding an anti-solvent into the extracting solution to precipitate the flavonoid compound, centrifuging again, collecting the precipitate, washing with a detergent, and drying to obtain the total flavonoid extract of the litsea coreana. According to the method, organic solvents and high-temperature conditions are not used, under the condition that the temperature is controlled to be 60 DEG C or below in the whole process, the extraction rate of the litsea coreana is greatly increased, the shelf life of the litsea coreana flavonoid extract is prolonged, and the method is simple, easy to operate and convenient to apply and popularize and has good industrial prospects.

This invention belongs to the field of antibiotic raw material preparation, and provides a clindamycin phosphate raw material and its preparation method. The method first purifies a crude aqueous solution containing clindamycin phosphate using a bifunctional mesoporous silica adsorbent, then employs antisolvent crystallization induced by activated seed crystals, followed by drying to obtain the raw material. The obtained raw material has high purity, low total related substances (TLS) and low maximum single related substance (MSLS), controllable moisture content and particle size, and balances the engineering applicability and crystallization processability of granular fixed-bed packing. It alleviates the difficulties in balancing high-selectivity purification with fixed-bed compatibility, particle size processability, and high purity with low MSLS levels, and is suitable for the preparation and scale-up application of clindamycin phosphate raw materials.

Provided is a method to prepare a solid dispersion composition comprising an active pharmaceutical ingredient (API) and a pharmaceutically acceptable dispersion carrier, which includes (a) dissolving the API and the pharmaceutically acceptable dispersion carrier in a solvent to form a dissolved API / pharmaceutically acceptable dispersion carrier solution; and / or (b) combining the dissolved API / pharmaceutically acceptable dispersion carrier solution and an anti-solvent to form a combination, wherein the anti-solvent comprises a surfactant; and / or (c) mixing the combination to generate an emulsion with a predetermined mean particle size range; and / or (d) removing the solvent from the emulsion to generate the solid dispersion composition, wherein the solid dispersion composition has the predetermined mean particle size range. Preferably, the API in the solid dispersion composition is amorphous. Also provided is an emulsion and / or a solid dispersion composition comprising the API and a dispersion carrier. Also provided is a solid dispersion made by the methods of the invention. In embodiments, the present invention includes Compound (1), also known as zongertinib, and apparatus for continuous processing according to the methods disclosed herein.

The invention belongs to the technical field of medicinal chemistry and green chemical industry, and particularly relates to a green circulation method of rotundine resolution mother liquor. According to the method, the acid mother liquor generated after chiral resolution of rotundine (L-tetrahydropalmatine) tartaric acid is used as a raw material, separation and purification are not needed, the acid environment of the mother liquor is directly utilized, hydrogen peroxide is used as a green oxidizing agent, and the target product is obtained. The method comprises the following steps: oxidizing a residual tetrahydropalmatine mixture (including dextroisomer, unresolved racemate and lost levoisomer) in a mother solution into palmatine salt; then, an alkaline reducing agent is directly added into the reaction system without separation, the palmatine salt is reduced into racemic tetrahydropalmatine, meanwhile, the reducing agent or a hydrolysate of the reducing agent is neutralized with residual acid in the oxidation step, and self-adjustment of the pH of the system is achieved. According to the method, a post-treatment strategy of combining a one-pot method with a solvent devitrification resistance is creatively adopted, and the product is directly and efficiently separated out from a reaction system by simply adjusting pH and diluting, so that the process is greatly simplified. The method abandons the scheme of using expensive and toxic oxidants such as iodine or N-halogenated imide in the traditional process, has the remarkable advantages of low cost, environmental friendliness, high atom economy, short process flow and extremely small wastewater generation amount, and is very suitable for industrial production.

Provided is a method to prepare a solid dispersion composition comprising an active pharmaceutical ingredient (API) and a pharmaceutically acceptable dispersion carrier, which includes (a) dissolving the API and the pharmaceutically acceptable dispersion carrier in a solvent to form a dissolved API / pharmaceutically acceptable dispersion carrier solution; and / or (b) combining the dissolved API / pharmaceutically acceptable dispersion carrier solution and an anti-solvent to form a combination, wherein the anti-solvent comprises a surfactant; and / or (c) mixing the combination to generate an emulsion with a predetermined mean particle size range; and / or (d) removing the solvent from the emulsion to generate the solid dispersion composition, wherein the solid dispersion composition has the predetermined mean particle size range. Preferably, the API in the solid dispersion composition is amorphous. Also provided is an emulsion and / or a solid dispersion composition comprising the API and a dispersion carrier. Also provided is a solid dispersion made by the methods of the invention. In embodiments, the present invention includes Compound (1), also known as zongertinib, and apparatus for continuous processing according to the methods disclosed herein.

The application provides a preparation method of amorphous pomegranate-like nanocellulose, which comprises the following steps: dissolving cellulose in a specific solvent to form a cellulose solution with a concentration of 0.001 wt%-15 wt%, adding a hydrophobic modifier into the cellulose solution, hydrophobically modifying the dissolved cellulose to obtain a hydrophobic cellulose solution, mixing and diffusing the hydrophobic cellulose solution with an anti-solvent to make the hydrophobic cellulose self-assemble into primary particles through van der Waals force, reassembling the primary particles into amorphous pomegranate-like nanocellulose due to high surface energy, obtaining a suspension of the amorphous pomegranate-like nanocellulose, and finally completely removing the specific solvent and the hydrophobic modifier and drying to obtain the amorphous pomegranate-like nanocellulose. The application innovatively combines the dissolution, hydrophobic modification and regeneration of cellulose to prepare the amorphous pomegranate-like nanocellulose with novel biomimetic pomegranate-like structure.

The present disclosure relates to an electrolyte for a lithium secondary battery capable of improving initial discharge characteristics, lifespan characteristics, output characteristics, and the like of a lithium metal secondary battery, and a lithium metal secondary battery comprising the same. The electrolyte may include a lithium salt; a non-aqueous organic solvent; an organic anti-solvent, wherein the solubility of the organic anti-solvent to the lithium salt is 10 times or more lower than the solubility of the non-aqueous organic solvent to the lithium salt; and an additive comprising a fluorine-substituted ether compound.

A porous hollow fiber membrane based anti-solvent crystallization (AsCr) process is disclosed. The process involves injecting an anti-solvent from a bore of a hollow fiber membrane into a shell side where a feed solution containing a solution containing a material, e.g., an API, is flowing. The shell-side feed solution flows perpendicular to the hollow fiber length; the shell side liquid is in cross flow across the hollow fiber membranes. Multiple HFM modules may be positioned in series with nanocrystal suspension product from one module fed to the next module that is independently fed with an anti-solvent. The crossflow HFM based continuous AsCr technique disclosed herein could result in continuous nanocrystal production of APIs.

The invention relates to the technical field of adsorption materials, in particular to a functional polymer material for high-selectivity n-heptane adsorption separation and a preparation method of the functional polymer material. During preparation, hydroxypropyl-beta-cyclodextrin is used as a core raw material, polymerizable double bonds are introduced through in-situ esterification, and then the functional polymer material is prepared from hydroxypropyl-beta-cyclodextrin, perfluorooctyl ethyl acrylate and divinyl benzene through an emulsion dispersion-emulsion polymerization process. According to the material, impurities are included in a hydrophobic cavity of modified hydroxypropyl-beta-cyclodextrin, and the hydrophobic synergistic effect of a perfluoro side chain is combined, so that the impurities are adsorbed, and a three-dimensional network constructed by divinyl benzene can fix functional sites and inhibit swelling of chain segments. The functionalized polymer material for high-selectivity n-heptane adsorption separation is high in n-heptane separation selectivity, excellent in solvent expansion resistance and long-term stable in functional sites, the preparation process does not need special monomers, conditions are mild, large-scale production is easy, and the functionalized polymer material can be efficiently applied to n-heptane purification in the fields of petrochemical engineering and the like.

The invention belongs to the technical field of modified lignin, and discloses a preparation method and application of multifunctional modified lignin. The preparation method comprises the following steps: (1) mixing a wood fiber raw material with tannic acid, then adding an organic acid solution, and reacting under stirring and heating conditions; (2) after the reaction is finished, cooling to room temperature, filtering, and performing suction filtration by a vacuum pump to separate cellulose solid residues and lignin filtrate; and (3) precipitating the lignin filtrate into an anti-solvent for regeneration, centrifugally collecting precipitates for three times, freeze-drying, and vacuum-drying to obtain the modified lignin. Under mild conditions, efficient extraction, structure protection and function enhancement of lignin are synchronously realized, the obtained modified lignin becomes a multifunctional bio-based raw material due to the remarkably improved ultraviolet absorption capacity, antioxidant activity and tyrosinase inhibition, and the application of the modified lignin can be extended to multiple fields such as functional cosmetics, high polymer materials, food preservation and the like.

The invention discloses a tough nanocellulose / lignin film based on an in-situ self-assembly method and a preparation method and application thereof, and belongs to the field of nanocellulose films. The preparation method comprises the following steps: (1) dissolving lignin in a solvent to obtain a mixed solution; the lignin is enzymolysis lignin; (2) dropwise adding the mixed solution into the carboxymethyl nanocellulose dispersion liquid to obtain a composite solution; and filtering and drying to obtain the nanocellulose / lignin film. According to the invention, the anti-solvent self-assembly property of lignin is utilized, a composite network structure with lignin colloidal spheres wrapping nano cellulose is constructed through an in-situ self-assembly method, and the obtained composite film has excellent strength, toughness, ultraviolet shielding property and high hydrophobicity; the potential application prospect in the fields of flexible photoelectric devices and the like as a plastic substitute is shown.

The utility model discloses an anti-precipitation storage tank for waterproof anti-solvent SBR (styrene butadiene rubber) latex, which belongs to the technical field of storage tanks and comprises a tank body, a plurality of groups of stirring blades are connected in the tank body, and a sliding mechanism is slidably connected outside a rotating shaft. The outer portion of the fourth sleeve is rotationally connected with a driving mechanism. The efficient stirring and precipitation prevention effects are achieved through the sliding mechanism, the motor drives the rotating shaft to drive the second sleeve, the third sleeve and the fourth sleeve to rotate, then the multiple sets of stirring blades are driven to rotate, latex in the tank body is stirred, meanwhile, when the stirring blades move downwards, the inner wall of the tank body can be rubbed and scratched, and the stirring effect is good. Residual precipitates on the inner wall are cleaned, so that precipitation is further prevented, the phenomenon of idling is avoided, sharp reduction of the contact area of the stirring blades and the materials is avoided, air entrainment and aggravation of accumulation of the precipitates at the bottom of the tank body are reduced, the stirring efficiency is improved, and the precipitation risk is avoided.

The invention belongs to the field of pharmaceutical preparations, and provides an auxiliary material system for pulmonary administration of insoluble drugs and a preparation method of the auxiliary material system. According to the invention, a collaborative design of lipid-coated indissolvable drug nanocrystal core-shell particles and a ternary lipid dispersion intermediate is adopted, and an anti-solvent precipitation in-situ coating and high-pressure microjet refining technology is adopted; the preparation method comprises the following steps: coating the outer surface of a nintedanib nanocrystal with a lipid shell layer composed of dipalmitoyl-sn-glycerol-3-phosphorylcholine, cholesterol and propylene glycol caprylate to form core-shell particles with the mass median particle size D50 value of 150-250 nm and the volume distribution D90 value of less than or equal to 400 nm. According to the invention, high drug loading capacity, low viscosity and atomizable property are realized, lung deposition distribution and long-term particle size stability are optimized, the contradiction between high solid content and rheological property, low irritation and colloid stability, and atomization efficiency and core-shell structure integrity in lung administration of insoluble drugs is effectively relieved, and the preparation method has wide clinical application value.

The invention belongs to the technical field of organic hole transport materials, and discloses preparation and application of a side chain type block copolymer capable of being used as a hole transport layer material. The side chain type segmented copolymer is divided into a conjugated unit and a cross-linking unit. The conjugated unit mainly takes an electricity-donating triphenylamine unit as a core, so that the conjugated unit has relatively high carrier mobility, and meanwhile, plane conjugated groups such as carbazole and fluorene are introduced, so that the thermal stability of the polymer is improved, and the HOMO energy level is adjusted. A flexible chain segment and a crosslinking group are introduced into the crosslinking unit, so that low-temperature crosslinking can be realized. The block copolymer not only has a wide band gap, high carrier mobility and high thermal stability, but also has good solvent resistance. The polymer can be used as a hole transport layer material, and is applied to organic photoelectric devices, especially OLED and QLED devices which can be processed by a solution.

The application discloses a lutein ester purification method, and belongs to the technical field of lutein ester purification. The purification method comprises the following steps: S1, lutein ester is coarsely dissolved in an organic solvent to prepare a crude product solution; S2, the crude product solution is loaded into a chromatographic column containing a composite adsorbent, gradient elution is carried out, and an eluate is collected; and S3, the eluate is concentrated to obtain a concentrated slurry, an anti-solvent is added for crystallization, and then filtration, washing and drying are carried out. The composite adsorbent in step S2 is composed of silica gel and macroporous adsorption resin. The gradient elution in step S2 is carried out by sequentially using a first eluent and a second eluent. The first eluent is petroleum ether and ethyl acetate with a volume ratio of 10-20:1. The second eluent is petroleum ether and ethyl acetate with a volume ratio of 2-5:1. The purity of the lutein ester is finally increased to more than 99%, and the yield is as high as more than 85%.

The invention belongs to the technical field of chemical engineering, and relates to a lactide separation and purification method and system, and the method comprises the following steps: dissolving crude lactide in a solvent, adding an anti-solvent, carrying out solventing-out crystallization, and carrying out melt crystallization to obtain separated and purified lactide. The system comprises a raw material preprocessor, a solventing-out crystallizer, a first dryer, a melt crystallizer and a second dryer which are sequentially connected in series. Compared with the prior art, the method has the advantages of short flow, low energy consumption, good separation effect, high product purity and the like, and can meet the production requirements of high-purity lactide.