283 results about "Acetic anhydride" patented technology

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention discloses a peracetylated polysaccharide derivative mixing accelerator as well as a preparation method and application thereof, and relates to the technical field of polysaccharide derivatives. Alkyl polyglucoside and glycidyl ether are subjected to etherification reaction to obtain polysaccharide derivatives; and adding acetic anhydride and an organic weak base catalyst into the polysaccharide derivative, and carrying out esterification reaction to obtain the peracetylated polysaccharide derivative. The obtained peracetylated polysaccharide derivative can be used for reducing the minimum miscible pressure of CO2 in an offshore oilfield. The polysaccharide derivative provided by the invention is simple in synthesis process, and the molecular activity of the polysaccharide derivative can be regulated and controlled by changing the number of carbon dioxide-philic groups and the length of oleophylic unsaturated hydrocarbon chains, so that the polysaccharide derivative can be used in the CO2 oil displacement process of oilfield exploitation, and the minimum miscible pressure in the CO2 oil displacement process is effectively reduced.

The invention belongs to the technical field of energetic plasticizer preparation, and particularly discloses a method for preparing N-butyl nitroxyethyl nitramine through ionic liquid nitration. The method comprises the following steps: mixing an ionic liquid nitrating agent with butyl ethanolamine to obtain a mixed solution; and mixing the mixed solution with a catalyst and acetic anhydride, reacting, and carrying out post-treatment to obtain the N-butyl nitroxyethyl nitramine. According to the method, the ionic liquid with stable properties is adopted as the nitrating agent, the reaction is mild when the ionic liquid is mixed with the butylethanolamine, violent heat release caused when fuming nitric acid is in contact with the butylethanolamine is effectively avoided, and the ionic liquid precursor can be recycled through simple extraction after the reaction.

The invention provides a method for detecting the hydroxyl value of a polyether material. The method comprises the following steps: (1) constructing a standard quantitative system of a derivatization reagent; (2) fully reacting a to-be-detected polyether material with the excessive derivatization reagent; (3) testing the peak area of the unreacted derivatization reagent by adopting chromatography; (4) comparing with a standard quantitative system of the derivatization reagent, and calculating the content of the unreacted derivatization reagent; and (5) calculating the consumption of the derivatization reagent in the step (2) by using the calculated content of the unreacted derivatization reagent, thereby calculating the hydroxyl value of the polyether material according to the stoichiometric relationship. Wherein the derivatization reagent comprises at least one hydroxyl esterifying agent selected from the following groups: phthalic anhydride, acetic anhydride and benzoyl chloride.

The invention discloses a modified bamboo fiber reinforced polypropylene composite material and a preparation method thereof, and belongs to the field of polypropylene composite materials, the modified bamboo fiber reinforced polypropylene composite material is characterized by comprising the following raw materials by mass: 1-10 parts of modified bamboo fiber, 80-90 parts of polypropylene, and 1-5 parts of a compatilizer. The modified bamboo fiber is prepared by modifying the surface of bamboo fiber by using acetic anhydride as an acetylation reagent and concentrated sulfuric acid and glacial acetic acid as a solvent system. Through acetylation modification of the bamboo fiber, the surface hydrophobic effect of the bamboo fiber is greatly improved, the bamboo fiber adapts to a polypropylene polymer non-polar material, and the interfacial compatibility between the bamboo fiber and polypropylene is improved. Fine fibers can be separated from the modified bamboo fibers through two screw extrusion processes under the shearing action of the screws and are uniformly dispersed in a polypropylene matrix, the fine fibers have the effect of a heterogeneous nucleating agent on polypropylene, the reinforcing effect of the bamboo fibers on the polypropylene is improved, and the composite material is endowed with more excellent mechanical performance and thermal stability.

The present application relates to a kind of five-ring thiazole indole ketone piperazine amide derivatives and purposes thereof.The derivatives take ethyl cyanoacetate as starting material, generate hydroxylamine compound (A) under the action of sodium nitrite and phosphoric acid;Obtain 2-amino ethyl cyanoacetate (B) by reduction, in turn with acetic anhydride, lawson reagent is reacted, and 5-amino-4-carboxylate thiazole compound (D) is obtained;After bromination by NBS, under the catalysis of phosphorus oxychloride, react with tetrahydropyridine indole ketone, generate 2-bromo-6,7-dihydrothiazolo [5'',4'':4',5'] pyrimido [1',2':1,2] pyrindo [3,4-b] indole-4 (12H) -ketone (F), again under alkaline condition, first with Boc piperazine, then by Boc treatment and obtain compound (H);Finally, react with acyl chloride, and 28 different substitution structures of five-ring thiazole indole ketone piperazine amide compound (I1-I28) are synthesized.The 28 compounds are tested on three kinds of cancer cells, and the results show that: 28 compounds have significant inhibitory activity on Hela cervical cancer cells, HT-29 human colon cancer cells and HGC-27 human gastric cancer cells.

The application discloses a synthesis method of 2'-OMe adenosine, comprising the following steps: S1. dissolving adenosine in DMF, and reacting with a methylation reagent in the presence of a base to obtain a mixture of 2'-OMe adenosine and 3'-OMe adenosine; S2. reacting the mixture of 2'-OMe adenosine and 3'-OMe adenosine with acetic anhydride in a solvent to obtain an acetylated mixture; S3. deacetylating the acetylated mixture under the action of ammonia, and crystallizing to obtain 2'-OMe adenosine; the application uses cheap and easily available raw materials and a safe alkylating reagent, synthesizes 2'-OMe adenosine through a shorter route, avoids column chromatography operation, and provides a new synthesis method of 2'-OMe adenosine which is easy to process.

The invention discloses a method for synthesizing a polysubstituted trifluoromethyl olefin compound from gem-difluoroallyl alcohol. The preparation method comprises the following steps: in a nitrogen (N2) atmosphere, sequentially adding a gem-difluoroallyl alcohol (R1R2OHCR3C = CF2) compound, acetic anhydride (Ac2O), a solvent dichloromethane (DCM) and a fluorine source pyridine hydrofluoride (Py.9HF) reagent into a 10mL Schlenk tube to obtain a mixture, stirring the mixture at room temperature (rt) until the reaction is finished, filtering, washing and drying to obtain the compound. A crude product obtained by the reaction is subjected to silica gel column chromatography separation to obtain the high-selectivity polysubstituted trifluoromethyl olefin compound. The preparation method disclosed by the invention can be carried out under mild conditions and is simple and convenient to operate, most of the adopted raw materials are simple and easily available or commercialized reagents, the reaction raw materials are easily available, the yield of the target product is high, the functional group compatibility of the product is good, and the application range of a substrate is relatively wide; the obtained polysubstituted trifluoromethyl olefin compound contains a plurality of functional groups such as trifluoromethyl, olefin and the like. The method provides a more efficient and safer new strategy for synthesizing the polysubstituted trifluoromethyl olefin under mild conditions, particularly, metal participation is avoided, a new opportunity is provided for green medicine synthesis, and the method is predicted to have wide application prospects in the fields of medicine research and development, natural product derivative synthesis, life science and the like.

The invention discloses a method for preparing methyltriacetoxysilane from acetic anhydride-containing acetyl chloride distillation tailings, and relates to the technical field of organic silicon synthesis, the method comprises the following steps: adding methyl trichlorosilane and acetic anhydride-containing acetyl chloride distillation tailings into a reaction kettle, stirring and heating; after a total reflux condition is reached, maintaining total reflux for a period of time, and then starting to collect acetyl chloride; continuously heating until the collection of acetyl chloride is completed, stopping heating, and when the temperature of the kettle is reduced to room temperature, heating again and starting vacuum negative pressure; when the kettle temperature reaches a set value, stopping heating, stopping stirring, and closing vacuum negative pressure; and after the kettle temperature is reduced to room temperature, adding pretreated activated carbon, carrying out decoloration reaction, and carrying out suction filtration after the reaction is completed, thereby obtaining the product. According to the method, a large amount of acetic anhydride in the acetyl chloride distillation tailings is used as a raw material and directly reacts with methyl trichlorosilane to prepare methyltriacetoxysilane, and the quality of the obtained product is remarkably higher than that of a product prepared by a normal process.

The application discloses a synthesis method of afugan, which comprises the following steps: 1-[3-chloro-5-(trifluoromethyl)phenyl]-2,2,2-trifluoroacetone and 4-acetylnaphthalene carboxylic acid are added into a solvent, a base is added, DMAP is added after complete reaction at 50-80 DEG C, acetic anhydride is added dropwise, tetrabutylammonium bromide is added after complete reaction, and an aqueous solution of sodium hydroxide and hydroxylamine hydrochloride is added, and reaction is carried out at 0-5 DEG C, so that an intermediate is obtained; the intermediate is reacted with acyl chloride under the action of DMF and dichloromethane, so that 4-(5-(3-chloro-5-(trifluoromethyl)phenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazole-3-yl)-1-naphthalene carboxylic chloride is prepared; 2-amino-N-(2,2,2-trifluoroethyl)acetamide hydrochloride and a dichloromethane solution of a base are added dropwise, and reaction is carried out at 0-5 DEG C, so that afugan is obtained. The method has a short route, high yield and suitability for large-scale industrial production.

The invention relates to the technical field of chemical engineering, and discloses a method for improving the chromaticity and purity of acetic anhydride based on a reflux ratio, and the method comprises the following steps: optimizing an evaporation tower, an acetic acid rectifying tower and an acetic anhydride rectifying tower, and installing an online detection instrument and an automatic control valve to construct an intelligent rectification control system; evaporating the crude acetic anhydride by using the optimized evaporation tower to obtain crude acetic anhydride steam; feeding the crude acetic anhydride steam into an acetic acid rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting a reflux system to preliminarily remove acetic acid; monitoring the acetic acid content through an online gas chromatograph, and finely adjusting the reflux ratio until the reflux ratio reaches the standard when the measured acetic acid content is higher than a target value; feeding the crude acetic anhydride reaching the standard into an acetic anhydride rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting to obtain an intermediate product; monitoring chromaticity and purity through an on-line platinum-cobalt colorimeter and an on-line gas chromatograph, and updating the reflux ratio to be qualified according to a bivariate adjustment formula; and finally, carrying out all-item detection on a finished product, and locking reflux ratio parameters after confirming that the finished product is qualified.

The invention relates to the technical field of cholesterol preparation, and discloses a preparation method of plant-derived cholesterol, which comprises the following steps: 1) heating and dissolving phytosterol with n-amyl alcohol, adding stigmasterol until saturation, cooling and crystallizing, and then carrying out solid-liquid separation to obtain a stigmasterol crude product; 2) heating and dissolving the stigmasterol crude product with absolute ethyl alcohol, adding pyridine, and continuously dropwise adding acetic anhydride for reaction; after the reaction is completed, adding deionized water for mixing, extracting with n-hexane for multiple times, separating an upper-layer oil phase, and concentrating and drying the oil phase to obtain a white solid; 3, the white solid is subjected to oxidation reduction, witting reaction and hydrogenation reaction, and cholesterol is obtained.The method has the advantages that compared with the prior art that the plant source cholesterol is directly prepared from the raw material phytosterol, the process is simplified, and meanwhile the product yield can be increased.

To provide a method for producing a trimellitic anhydride ester satisfying high yield, high purity and low chlorine content required for an electronic material by a simple operation.SOLUTION: The method for producing a trimellitic anhydride ester includes a step A of reacting a trimellitic anhydride halide and a specific alkanediol to obtain a crude trimellitic ester, and a step B of purifying the crude trimellitic ester, wherein the step B includes a step B1 of mixing a poor solvent having an octanol / water partition coefficient of -2.0 or more and 0.0 or less and a boiling point of 40°C or more and 120°C or less with the crude trimellitic ester to reprecipitate the crude trimellitic ester, and a step B2 of heating the mixed liquid containing at least the crude trimellitic ester after the reprecipitation and acetic anhydride, and recrystallizing the trimellitic ester.SELECTED DRAWING: None

The utility model discloses a production device of 3-acetamino phthalic acid, and belongs to the technical field of chemical production devices. The device comprises an acylation reaction device, an acidification device and a solid-liquid filtering device. The acylation reaction device comprises an acylation reaction kettle with a stirring device, an acetic anhydride high-position metering tank with a first rotor flow meter, a solid feeding hole and a first conveying pump; the acidification device comprises an acidification reaction kettle with a stirring device, a hydrochloric acid high-position metering tank with a second rotor flow meter, an online pH meter and a second delivery pump; and the solid-liquid filtering device comprises solid-liquid separation equipment, a filtrate receiving tank and a product collecting tank. All the devices of the device are connected through pipelines and stop valves. According to the utility model, the dosage of hydrochloric acid is reduced by adjusting the dosage of acetic anhydride and controlling the acidification pH value, so that the production cost is reduced, and the quality and yield of the product 3-acetamino phthalic acid are improved.

This invention provides an ethyl-containing alkoxy-terminated organosilicon polymer, its preparation method, and its applications. The preparation method includes: S1, mixing methylvinylcyclotetrasiloxane, a solvent, and a first catalyst, introducing hydrogen gas, and reacting at 50-70°C until the methylvinylcyclotetrasiloxane content is no higher than 5%, filtering to remove impurities and obtain the product; S2, under nitrogen protection, ring-opening the product obtained in step S1 with acetic anhydride in the presence of a ring-opening catalyst, neutralizing and hydrolyzing, removing impurities, and obtaining the product; S3, under nitrogen protection, reacting the product of step S2 with hexamethyldisilazane at 40-50°C for 1-3 hours, adding N,N-diethylamino-trialkoxysilane, and reacting at 50-60°C for 1-3 hours. The polymer obtained by this invention, as a thermally conductive powder treatment agent, can effectively improve the dispersion performance of powders and enhance the heat resistance of products without reducing their tensile strength.

The invention discloses a flexible glass cutting fluid and a preparation method thereof, and the preparation method comprises the following steps: S1, adding cellobiose into DMF, then adding chloroacetic anhydride and pyridine, and carrying out a stirring reaction to obtain an intermediate; s2, adding the intermediate into DMF (Dimethyl Formamide), and then carrying out constant-temperature reaction on glycerol monocaprylate, 2-(2-hydroxyphenyl) benzothiazole and triethylamine to obtain a modifier; s3, uniformly mixing a modifier, sodium dioctyl sulfosuccinate and a polyoxyethylene polyoxypropylene block copolymer, so as to obtain a composite surfactant; s4, adding the composite surfactant, the propylene glycol, the defoaming agent, the sterilizing agent and the triethanolamine into the water, and uniformly stirring to obtain the cleaning agent. According to the prepared cutting fluid, the protection effect on a flexible glass base material and a surface functional layer of the flexible glass base material is remarkably improved while the excellent wettability is kept, microcrack generation and surface damage in the cutting process are reduced, and the cutting fluid is particularly suitable for precise glass processing of flexible display devices.

The invention relates to a battery and electric equipment. The battery comprises a shell, a battery cell assembly and electrolyte, wherein the shell is provided with an accommodating cavity; the battery cell assembly is positioned in the accommodating cavity; the battery cell assembly comprises a positive pole piece, a diaphragm and a negative pole piece which are arranged in a laminated manner, the positive pole piece comprises a positive active material, the positive active material comprises an inner core and a carbon coating layer, the outer periphery of the inner core is coated with the carbon coating layer, the inner core comprises lithium iron phosphate, and the carbon coating layer is provided with a C-O bond; the electrolyte is used for infiltrating at least part of the battery cell assembly, the electrolyte comprises a first additive, and the first additive comprises thiohydroxyacetic anhydride; wherein the mass ratio of the first additive in the electrolyte is a, the quantity ratio of the C-O bonds in the carbon-containing chemical bonds in the carbon coating layer is b, and the battery meets the relational expression: 0.25 < = 100a / b < = 20.

The invention relates to the technical field of chemical engineering, and discloses a rectification optimization process for improving the quality of acetic anhydride, the process realizes efficient pre-removal of high boiling impurities and colored substances in crude acetic anhydride by optimizing the structure of an evaporation tower, adopting combination of falling film evaporation and filler reinforcement, and accurately controlling the operation parameters of vacuum degree, temperature and feeding amount, so that the quality of the acetic anhydride is improved, and the quality of the acetic anhydride is improved. A traditional tower plate of the acetic acid rectifying tower is replaced with the efficient float valve tower plate, the internal part structure of the efficient float valve tower plate is optimized, the gas-liquid mass transfer efficiency in the rectifying tower is improved, and efficient and stable separation of acetic acid and acetic anhydride is achieved through precise linkage control over temperature and reflux ratio rectifying parameters. The main content of the product is improved; the impurity content is reduced; through whole-process online monitoring and regular optimization iteration in combination with a process parameter-product quality database, dynamic regulation and control and continuous improvement of the production process are realized, and finally the beneficial effects that the main content of acetic anhydride in the product is greater than or equal to 99.65% and the chromaticity is less than or equal to 6 are achieved.

The application discloses a method for preparing 3-methoxy-3-methyl-1-butyl acetate, and belongs to the technical field of organic compound synthesis. The method comprises the following steps: taking 3-methoxy-3-methyl-1-butanol as raw material, and respectively adopting acetic acid, acetic anhydride and acetyl chloride as acetylation reagents, and adding a catalyst or an acid-binding agent to perform acetylation reaction, so as to obtain 3-methoxy-3-methyl-1-butyl acetate. The application provides a synthesis method for 3-methoxy-3-methyl-1-butyl acetate, takes 3-methoxy-3-methyl-1-butanol as raw material, respectively adopts acetic acid, acetic anhydride and acetyl chloride as acetylation reagents, adds a catalyst or an acid-binding agent to perform acetylation reaction, and obtains 3-methoxy-3-methyl-1-butyl acetate. In view of the defect that there is no acetylation synthesis process suitable for the target product in the prior art, the related technical blank is filled.

The application provides a composite iron phosphate and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing nanocellulose, glacial acetic acid, acetic anhydride, perchloric acid and an organic solvent to obtain acetylated nanocellulose through reaction; (2) mixing nanocellulose, TEMPO and sodium bromide with water, adding sodium hypochlorite solution to obtain oxidized nanocellulose through reaction; (3) mixing the oxidized nanocellulose and the acetylated nanocellulose with an acidic aqueous solution, then mixing with an oily solvent to obtain a water-in-oil emulsion; (4) mixing an iron source, a phosphorus source and the water-in-oil emulsion, and then obtaining the composite iron phosphate through sintering treatment after reaction. The application utilizes the different hydrophilic / hydrophobic difference of acetylated and oxidized nanocellulose to induce the generation of a spherical shell-shaped iron phosphate filled with rod-shaped structures, the nanocellulose forms carbon in situ after high-temperature calcination, and the uniform distribution of the carbon layer is realized, and the conductivity is further improved.

The invention relates to the technical field of acetic anhydride storage, and provides an acetic anhydride storage tank anti-explosion pressure relief device which comprises a blocking block, a valve body, a valve cover and a valve element. The valve body comprises an outer valve seat and an inner valve seat, a pressure relief cavity is formed in the inner valve seat, and the valve element is arranged in the pressure relief cavity in a sliding mode. A spiral flow guide cavity is formed in the blocking block, a communicating cavity is formed in the valve element, and a low-pressure cavity, a medium-pressure cavity and a high-pressure cavity are formed between the valve element and the inner valve seat from bottom to top in sequence. A gas-liquid separation cavity is formed in the valve deck, the communicating cavity communicates with the spiral flow guide cavity and the low-pressure cavity, and the high-pressure cavity communicates with the gas-liquid separation cavity. A liquid return pipe is arranged on the valve cover in the radial direction, the other end of the liquid return pipe is connected to the position below the feeding port of the tank body, and a one-way valve is arranged on the liquid return pipe. When the valve element moves from bottom to top, the elastic piece is compressed to store energy, and the low-pressure cavity is firstly communicated with the medium-pressure cavity. The pressure relief device adapts to acetic anhydride storage pressure gradient change, and stable and smooth pressure relief is achieved.

The invention discloses a method for preparing phenyl acetate with high selectivity. A phosphoric acid solution is added into a magnesium chloride solution, stirring and heating are performed to obtain a suspension, the suspension is dried to constant weight to obtain a white solid, the white solid is ground to obtain powder, and the powder is calcined to obtain the catalyst. Then mixing phenol and a catalyst, placing the mixture in an oil bath for reflux reaction, dropwise adding acetic anhydride, distilling after the reaction is finished, and collecting a fraction at 190-195 DEG C, namely phenyl acetate. According to the magnesium chloride loaded phosphoric acid type catalyst (MgCl2-H3PO4) prepared by the method disclosed by the invention, phenol and acetic anhydride react without a solvent, MgCl2-H3PO4 is a solid catalyst, can be recycled only by filtering and can be repeatedly used after being washed, and MgCl2-H3PO4 also improves the selectivity of phenyl acetate and reduces the production cost.

The application belongs to the technical field of starch chemical modification, and particularly relates to a preparation method of acetylated distarch phosphate. The method comprises the following steps: mixing starch with a deep eutectic solvent composed of choline chloride, glycerol and a small amount of water, adding a phosphate crosslinking agent and a delayed-release alkalizing agent for crosslinking reaction after pH adjustment, performing acetylation reaction by adding acetic anhydride or vinyl acetate after cleaning by alcohol solvent replacement, and finally obtaining the product through neutralization, washing, dehydration and drying. The process utilizes the deep eutectic solvent to control water activity and particle structure, and combines the slow-release alkali source to maintain a stable reaction environment, so that the crosslinking and acetylation are uniformly carried out, and the side reactions and residual salt load are effectively reduced. The obtained acetylated distarch phosphate has stable substitution degree, uniform particle structure and excellent performance in freeze-thaw stability, and is suitable for multiple fields such as papermaking, textile and oil field additives.

The invention provides a method for preparing 2, 6-diamino-3, 5-dinitropyridine, which comprises the following steps: (1) reacting 2, 6-diaminopyridine with an amino protection reagent to obtain an intermediate A; (2) in the presence of a dehydrating agent, carrying out double nitration reaction on the intermediate A and a nitration reagent to generate an intermediate B; (3) 2, 6-diamino-3, 5-dinitropyridine is obtained after the intermediate B is subjected to deprotection, and an amino protection reagent is selected from one or more of acetic anhydride, trifluoroacetic anhydride, di-tert-butyl dicarbonate, benzyl chloroformate and concentrated sulfuric acid; wherein the molar ratio of the amino protection reagent to the 2, 6-diaminopyridine is (2: 1)-(30: 1) by mole; and preferably, the ratio is 2: 1-12: 1.

The invention relates to a preparation method of acetylated distarch phosphate with high transparency, and belongs to the technical field of starch deep processing. The method comprises the following steps: by taking waxy corn starch as a raw material, dispersing the waxy corn starch into starch milk, and carrying out ultrasonic pretreatment; then sequentially carrying out acetylation and cross-linking reaction under a step-by-step optimization condition: firstly, taking acetic anhydride as a reagent, carrying out reaction at the pH value of 8.0-9.0 and the temperature of 20-35 DEG C, neutralizing until the pH value is 6.0-7.0, then taking sodium trimetaphosphate as a cross-linking reagent, adding sodium chloride as an accelerant, and carrying out reaction at the pH value of 10.0-11.0 and the temperature of 35-50 DEG C; and finally, neutralizing, washing with a 70-90% ethanol water solution, and drying to obtain the product. The product disclosed by the invention is excellent in transparency and good in freeze-thaw stability, and can be efficiently applied to preparation of transparent gel foods, frozen desserts and neutral transparent beverages.

The invention relates to a preparation method of an aromatic polyester resin composition, which comprises the following steps: mixing raw materials, and pouring the mixed raw materials into a stainless steel reaction kettle; heating and refluxing: heating to 120 DEG C to refluxing the reaction system; heating and distilling, opening a distillation system, and distilling out excessive acetic anhydride and byproduct acetic acid; discharging treatment is conducted, discharging is conducted after the reaction is completed, material sheets are discharged from the tablet press, the cooled materials are fed into a pulverizer to be pulverized, and low-molecular-weight aromatic polyester resin powder is obtained; and performing solid-phase polymerization, namely putting the low-molecular-weight aromatic polyester resin powder into an intermittent rotary furnace, and performing solid-phase polymerization. The preparation method has good stability and reliability, the reaction steps are simplified, the operation difficulty is reduced, and the convenience of the production process is improved.

The invention discloses a synergistic photodynamic-photo-thermal tumor treatment method realized by near-infrared two-region aggregation-induced emission nanoparticles, and belongs to the field of cancer treatment by using aggregation-induced emission materials. The preparation method of the near-infrared second-region aggregation-induced emission photosensitive compound comprises the following steps: mixing a compound 1, a compound 2, tetrakis (triphenylphosphine) palladium and potassium carbonate in a mixed solution of tetrahydrofuran and water, and performing reflux reaction to obtain a compound 3; and mixing the compound 3 and the compound R2 in acetic anhydride, and reacting to obtain the near-infrared second-region aggregation-induced emission photosensitive compound. Through molecular design, the multifunctional photosensitizer integrating NIR-II excitation, efficient I-type PDT, ultra-efficient PTT and AIE characteristics is successfully prepared, and a brand new technical scheme is provided for solving the hypoxia bottleneck in tumor treatment and achieving efficient collaborative treatment.

The present invention relates to a method for producing partially acetylated cellulose nanofibres, CNF, which have a low re-agglomeration tendency and can be used as a reinforcing agent for thermoplastic and thermosetting resins. The method comprises the steps of fibre processing, acetylation and washing. This is a simple and low-cost method that does not require the use of a catalyst or acetic anhydride as a reagent.

The utility model discloses a system for recycling chloroacetic acid by dechlorinating dichloroacetic acid through photocatalysis, which relates to the technical field of chloroacetic acid synthesis equipment and comprises a collecting tank I used for collecting mother liquor containing dichloroacetic acid during preparation of chloroacetic acid, and the collecting tank I is sequentially connected with a plurality of stages of condensers and a filter I through pipelines. A filtrate outlet I of the filter I is sequentially connected with a storage tank, a photocatalytic reaction kettle, a plurality of stages of condensers and a filter II; a filtrate outlet II of the filter II is connected with the storage tank through a reflux pipeline; stirring mechanisms are arranged in the collecting tank I and the photocatalytic reaction kettle, an ultraviolet visible light lamp is mounted in the photocatalytic reaction kettle, a material inlet of the photocatalytic reaction kettle is connected with a mother liquor supply pipeline, a water supply pipeline, a catalyst supply pipeline and a hydrogen supply pipeline, and the collecting tank I is connected with a nitrogen pipeline. The yield of chloroacetic acid prepared by an acetic anhydride catalysis method is improved, the generation of waste liquid is reduced, and the treatment cost of wastewater is reduced.

The invention provides a preparation method and application of an all-solid-state lithium ion battery, the all-solid-state lithium ion battery comprises a positive electrode, a negative electrode and a solid electrolyte, and the preparation method comprises the following steps: adding an interface modifier into raw materials of the positive electrode and / or the solid electrolyte, the fluoro anhydride is selected from at least one of difluoroacetic anhydride, trifluoroacetic anhydride, pentafluoropropionic anhydride or heptafluorobutyric anhydride. According to the preparation method and application of the all-solid-state lithium ion battery provided by the invention, the interfacial compatibility of the solid electrolyte with the positive electrode and the negative electrode can be remarkably improved, and the cycle performance of the high-voltage all-solid-state lithium ion battery is improved.