63 results about "Ethylene glycol ester" patented technology

The invention discloses a titanium-containing composition, a preparation method thereof and a polyester catalyst, and relates to the technical field of polyester catalysts, and the titanium-containing composition comprises reaction products of the following components: a titanium compound, a solvent, hydroxycarboxylic acid and / or amino acid. The titanium-containing composition is obtained by mixing and reacting the titanium compound, the solvent, the hydroxycarboxylic acid and / or the amino acid, the solvent adopts ethylene glycol ester, the flash point is high, the reaction activity with titanium is low, the preparation process is very smooth, meanwhile, the performance change of polyester is not caused when the titanium-containing composition is used for polyester, and the technical effect is good.

The application discloses a high viscosity-reducing polycarboxylic water reducing agent for ultra-high performance concrete and a preparation method thereof, and comprises the following steps: adding a metered amount of deionized water into a reaction container, and then adding a methyl allyl polyoxyethylene ether, sodium methallyl sulfonate, an alkyl acrylate, and styrene into the reaction container, stirring, and heating; adding a metered amount of hydrogen peroxide, and simultaneously dropping a mixed aqueous solution of acrylic acid AA and methoxy polyethylene glycol methacrylate MAA-MPEG and a mixed aqueous solution of mercaptoacetic acid and ascorbic acid; and after dropping, keeping warm. The prepared polycarboxylic water reducing agent can improve the dispersibility of the polycarboxylic water reducing agent, reduce the hydrophilicity of the whole polycarboxylic molecule, and obviously reduce the viscosity of concrete; under the premise that the concrete has good workability, the viscosity of high-grade concrete can be obviously reduced; the polycarboxylic water reducing agent has good adaptability to different types of cement, avoids the need to seek different types and structures of water reducing agents for different types of cement, and is beneficial to practical engineering application.

Provided is a heat-shrinkable polyester film that not only has a high heat shrinkage in the main shrinkage direction, but also has a good heat shrinkability of recycled PET resin even when recycled together with used beverage PET bottles. A heat-shrinkable polyester film containing, in 100 mol% of a dicarboxylic acid component, 95 mol% or more and 100 mol% or less of a dicarboxylic acid, 0 mol% or more and 5 mol% of isophthalic acid, and containing, in 100 mol% of all ester units, 85 mol% or more and 98 mol% or less of terephthalic acid ethylene glycol ester units, and containing, in 100 mol% of a polyol component, 2 mol% or more and 15 mol% or less of diethylene glycol, has a prescribed hot water heat shrinkage, and has a melting peak temperature, a crystallization exotherm, and a melting exotherm determined by melting the film after melting and quenching using a differential scanning calorimeter (DSC), and then re-warming, within prescribed ranges.

The present application provides a plasticizer composition which does not color the obtained molded body and has excellent plasticizing properties. Specifically, a plasticizer composition consisting of diethylene glycol dibenzoate and 1,2-propanediol dibenzoate, the mass ratio of the diethylene glycol dibenzoate to the 1,2-propanediol dibenzoate being in the range of diethylene glycol dibenzoate:1,2-propanediol dibenzoate = 50:50 to 80:20.

The application belongs to the technical field of waste PET recycling, and discloses a preparation method of an antibacterial polyurethane adhesive based on waste PET alcoholysis products. The method comprises the following steps: mixing 15-30 parts by weight of diisocyanate, 30-80 parts by weight of polyester polyol, 1-5 parts by weight of waste PET alcoholysis product terephthalic acid diethylene glycol ester and 0.3-0.7 parts by weight of a catalyst, reacting at 80-100 DEG C for 1-2 hours, cooling to 60-80 DEG C, adding 5-15 parts by weight of a chain extender, and reacting; in the reaction process, a diluent is added to obtain a hydroxyl-terminated polyurethane prepolymer; cooling to 40-55 DEG C, uniformly mixing 5-15 parts by weight of a blocked isocyanate curing agent and 40-80 parts by weight of a CS@Ag dispersion liquid to obtain the antibacterial polyurethane adhesive. The method is simple, realizes waste PET recycling, and improves the antibacterial performance and bonding performance of the polyurethane adhesive.

This invention provides a continuous method for preparing vitamin E succinate polyethylene glycol ester (TPGS). It uses a strongly acidic cation exchange resin (such as the Amberlyst series) or a perfluorosulfonic acid resin (such as the Nafion series) as a heterogeneous catalyst, which is packed in a fixed bed to catalyze the esterification reaction between vitamin E succinate and polyethylene glycol. This method achieves precise proportioning of reactants, instantaneous mixing, isothermal reaction, and online dehydration, reducing the reaction time from several hours required by existing batch methods to tens of minutes. It allows for long-term stable use, requires no complex post-processing, and produces products with high yield, good purity, and light color. The preparation method of this invention solves the problems of difficult catalyst recovery, excessive waste, low efficiency, and unstable product quality in existing methods, making it particularly suitable for large-scale, continuous, and green production of TPGS.

The application belongs to the field of air filtration, and specifically discloses a kind of water and oil removal air filtration material and its preparation method, the preparation method is to mix and react octadecyl methacrylate, isobutyl methacrylate, acrylic acid, ethylene glycol ester and styrene for a preset time to form modified methacrylic acid resin, then the first fiber short filament is prepared by using modified methacrylic acid resin;The second fiber short filament is prepared by using polyacrylate resin;Glass wool, the first fiber short filament and the second fiber short filament are mixed to prepare to obtain water and oil removal air filtration material.The application can achieve the effect of water and oil removal while maintaining efficient filtration of solid particles in the air, greatly prolonging the service life of the air filtration material, reducing the filter replacement cost and manual work intensity.

The present application relates to a kind of anti-mud slump type polycarboxylic water reducer and its preparation method, the polycarboxylic water reducer preparation raw material includes: polyether macromonomer 80~100 parts;Rigid unsaturated monomer 1~2 parts;Crosslinking monomer 1~2 parts;Unsaturated sulfonic acid monomer 2~3 parts;Unsaturated acid 10~15 parts;Oxidant 0.5~2 parts;Reducing agent 0.5~2 parts;And chain transfer agent 1~2 parts.The present application uses ethylene glycol monovinyl ether polyoxyethylene ether as polyether monomer, introduces crosslinking monomer itaconic acid polyethylene glycol ester, forms crosslinked molecular structure, and introduces (4- vinylphenyl) trimethoxysilane and other rigid structure, avoids clay's wipe layer adsorption, reduces clay surface adsorption site, weakens the competitive adsorption effect of clay to polycarboxylic water reducer, greatly improves anti-mud performance and slump performance.

The invention belongs to the technical field of conductive materials and rubber products, and particularly relates to maleopimaric acid macrogol ester modified titanium carbide, a preparation method and application thereof, conductive rubber and a preparation method thereof. According to the preparation method, maleopimaric acid macrogol ester is used for modifying titanium carbide nanoparticles, and maleopimaric acid macrogol ester modified titanium carbide is obtained. Carboxyl and hydroxyl of maleopimaric acid macrogol ester are stably combined with hydroxyl on the surface of titanium carbide, agglomeration of maleopimaric acid macrogol ester is effectively relieved, compatibility of maleopimaric acid macrogol ester with a rubber matrix is enhanced, the composite conductive filler is evenly dispersed in rubber, the conductivity of the prepared conductive rubber is remarkably improved, and the service life of the conductive rubber is prolonged. Meanwhile, the tensile strength, bending stability and other mechanical properties are excellent, and the material is suitable for the fields of electromagnetic shielding, flexible electronics and the like.

The invention discloses silver-coated copper powder and a preparation method and application thereof, and relates to the technical field of metal materials. The preparation method of the silver-coated copper powder comprises the following steps: preparing a dispersion liquid of copper powder, an amphiphilic block copolymer, vitamin E succinic acid polyethylene glycol ester, a reducing agent and a complexing agent, adding a soluble silver ion solution into the dispersion liquid, and reacting to obtain the silver-coated copper powder. The mass ratio of the amphiphilic block copolymer to the vitamin E succinic acid polyethylene glycol ester is 1: (0.8-4.5); the adding rate of the soluble silver ions is 0.01 g / min to 0.1 g / min. According to the preparation method, the silver-coated copper powder with good oxidation resistance and low silver content can be prepared.

The invention relates to a wastewater treatment device and process in the production process of polyethylene glycol lactate in the technical field of wastewater treatment and purification in the production process of polyethylene glycol lactate, and the wastewater treatment device comprises a water pollution prevention and control environment treatment pipe, a rotating rod, a first movable plate, a second movable plate and a plurality of stirring rods, an adjusting part in sliding connection with the end of the rotating rod is used for adjusting the distance between the first movable plate and the second movable plate, a stirring ring is movably inserted into the edge of the second movable plate through an elastic part, the stirring rod moves in the stirring ring, and a sliding rod connected with the adjusting part is in sliding fit with the middle of the second movable plate. The first movable plate and the second movable plate are driven to move away from each other or close to each other, meanwhile, a stirring ring and a stirring rod do circular motion and diffusion-contraction motion in the wastewater treatment pipe, the multi-dimensional and multi-layer stirring mode greatly improves the mixing efficiency of wastewater and neutralized substances, full proceeding of a neutralization reaction is promoted, and the wastewater treatment efficiency is improved. Therefore, the wastewater is effectively purified.

The invention discloses a brain-targeted nasal-spray amphotericin B phospholipid complex and a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations, the brain-targeted nasal-spray amphotericin B phospholipid complex is prepared by adopting a film dispersion method, and the preparation method comprises the following steps: dissolving 15-hydroxystearic acid polyethylene glycol ester, phospholipid, cholesterol, amphotericin B and optional other auxiliary components in a solvent, removing the solvent until a film is formed, and drying to obtain the brain-targeted nasal-spray amphotericin B phospholipid complex. And carrying out hydration dispersion to obtain the amphotericin B-loaded phospholipid complex. According to the amphotericin B sodium deoxycholate injection, the problems that the traditional amphotericin B sodium deoxycholate injection is high in renal toxicity, the intrathecal injection is poor in solubility, and low in bioavailability and patient compliance, large in side effect and the like due to the fact that the traditional amphotericin B sodium deoxycholate injection is difficult to penetrate through a blood brain After nasal administration, the drug is quickly delivered into the brain, so that the slow release of the drug is realized, the intracerebral bioavailability of the drug is improved, high brain targeting and low systemic toxic and side effects are realized, and good clinical application value and market prospect are achieved.

The invention belongs to the technical field of propellants, and provides a boron-containing fuel-rich propellant and a preparation method thereof.The propellant adopts fluorine-containing composite boron powder to replace common boron powder; a combination of hydroxyl-terminated polybutadiene and hydroxyl-terminated poly (polyethylene glycol succinate) is adopted as an adhesive; hydroxyl-terminated polyethylene glycol terephthalate containing a benzene ring rigid structure is adopted as a reinforcing agent, a polyethylene glycol chain segment, epoxy resin on the surface of boron powder and an oxidizing agent form a hydrogen bond, and hydroxyl-terminated polyether ester fixes a solid filler in a curing network and adjusts the crosslinking density at the same time; chemical bonds are generated on the surfaces of filler particles, so that the modulus of the propellant is further improved; the perfluoro diacid diester is used as a plasticizer, so that the burning efficiency is improved while the processing property of the propellant is not influenced; ferric polyacrylate, 2, 4-dinitrophenoxy ethanol and the like are used as combustion regulators to promote efficient oxidation of the boron powder. The boron-containing fuel-rich propellant provided by the invention can solve the demand problem of a solid ramjet engine on a high-modulus boron-containing fuel-rich propellant.

The application discloses a water-based paint for PET plastic and a preparation method thereof. The water-based paint for PET plastic comprises component A and component B. The component A is composed of silicone-modified hydroxyl acrylic resin, polycarbonate polyol, oxalic acid-based polyester polyol, succinic acid / isophthalic acid-based polyester polyol, maleic rosin polyethylene glycol ester, pigment, UV absorber, hindered amine light stabilizer, coupling agent, wetting agent, leveling agent, rheological aid, defoaming agent, accelerator, auxiliary solvent and deionized water. The component B is composed of hexamethylene diisocyanate, isophorone diisocyanate and dilution solvent. The water-based paint provided by the application is sprayed on the surface of a PET bottle, and after being dried into a film, the water-based paint has good adhesion to the PET bottle, is convenient for subsequent printing, electroplating or ion plating, and can effectively improve the water boiling resistance of the PET bottle.

The invention discloses a dispersing agent and a preparation method thereof as well as negative electrode slurry and application thereof, and relates to the technical field of dispersing agents. The dispersing agent disclosed by the invention is prepared from the following components: a styrene-N-vinyl pyrrolidone-vinylamine segmented copolymer and poly (methacrylic acid polyethylene glycol ester) laurate; the mass ratio of the styrene-N-vinyl pyrrolidone vinyl amine segmented copolymer to the poly (methacrylic acid polyethylene glycol ester) laurate is (3 to 6): 1. The steric hindrance effect of the styrene-N-vinyl pyrrolidone-vinylamine block copolymer and the dynamic wettability of the poly (methacrylic acid polyethylene glycol ester) laurate cooperate with each other, the dispersing and wetting effects are achieved at the same time, the dispersing performance is remarkably improved, and the obtained dispersing agent is suitable for being used in negative electrode slurry and can be used as a negative electrode material. The dispersion stability of the sizing material is improved.

The application discloses a diamond polishing liquid for optical lenses and a preparation method thereof, and relates to the technical field of polishing materials.The application comprises the following raw materials in mass parts: deionized water 93.3-116.6 parts, diamond micro powder 4-5 parts, sodium polyacrylate 1.5-1.9 parts, a surfactant 0.3-0.4 parts, a synergist 0.5-0.6 parts, and a zwitterionic copolymer 0.2-0.25 parts; the synergist is poly(acrylic acid-co-hydroxyethyl acrylate)-b-poly(N-vinylbenzyl benzotriazole) block copolymer; and the zwitterionic copolymer is a sulfobetaine methacrylate-polyethylene glycol methacrylate copolymer.The introduction of the synergist, the zwitterionic copolymer and the like effectively improves the material adaptation range, the material removal rate, the low residual property and the stability of the diamond polishing liquid.Therefore, the application has a more extensive application prospect.

This invention discloses a bio-based high-efficiency antibacterial polyester fiber and its preparation method, belonging to the field of synthetic fiber technology. It solves the problems of high hue, low bio-based content, and weak antibacterial performance in existing technologies. The fiber is copolymerized from a first, second, third, and fourth ester. The first ester is formed by esterification of oxalic acid and 1,3-propanediol; the second ester is formed by esterification of an aliphatic diacid and 1,3-propanediol; the third ester is formed by esterification of a quaternary ammonium salt of hydroxy fatty acids; and the fourth ester is formed by esterification of terephthalic acid and ethylene glycol. This invention uses oxalic acid, aliphatic diacids, 1,3-propanediol, and quaternary ammonium salts of hydroxy fatty acids to prepare polyester fibers, achieving a bio-based carbon content of over 30%. The entire preparation process eliminates the need for diethylene glycol dimethyl ether, a solvent required in existing technologies, thus solving the problem of high hue caused by solvent residue. The fiber maintains highly efficient and long-lasting broad-spectrum antibacterial properties, with an antibacterial rate exceeding 99%.

The application relates to the technical field of composite boards, and particularly discloses an anti-deformation environment-friendly composite board and a production process thereof. The composite board is made of amino-siloxane modified bamboo fibers, pyroglutamic acid-polyethylene glycol ester and poly-lactic acid which are mixed and then hot-pressed, secondarily compressed and shaped. The used materials have good degradability and reusability, meet the green environmental protection concept, have good stability and impact resistance, and can meet the demands of most users.

The invention discloses a flame-retardant electrolyte, an electrolyte injection process and a lithium ion battery, the flame-retardant electrolyte comprises: a basic electrolyte, the basic electrolyte comprises a lithium salt and an organic solvent; a cross-linking agent, wherein the cross-linking agent is triethylene glycol dimethacrylate; the flame retardant is 1, 3, 3, 5, 5-pentafluoro-1-ethyoxyl-cyclotriphosphazene, and the flame retardant is 1, 3, 3, 5, 5-pentafluoro-1-ethyoxyl-cyclotriphosphazene; the initiator is azodiisobutyronitrile, and the mass ratio of the initiator to the cross-linking agent is 1: (40-50). According to the flame-retardant electrolyte, through the synergistic effect of the flame retardant and the cross-linking agent, combustion free radicals can be captured to interrupt flame propagation, a three-dimensional gel network can be formed to block heat transfer, meanwhile, the lithium ion conduction efficiency and cycling stability are ensured by optimizing the ratio of the initiator to the cross-linking agent, and the balance of battery safety and electrochemical performance is achieved; and the compatibility with the existing lithium ion battery production process is good, and special equipment does not need to be additionally introduced.

The invention discloses a high-adhesion bio-based polyurethane hot melt adhesive and a preparation method thereof. Preparation raw materials of the adhesive comprise the following components in parts by weight: 10 to 30 parts of isocyanate, 5 to 20 parts of polyether glycol, 10 to 40 parts of polyphthalic anhydride-diethylene glycol ester glycol, 10 to 40 parts of polysebacic acid 3-methyl-1, 5-pentanediol ester glycol, 15 to 40 parts of bio-based polyol, 10 to 20 parts of tackifying resin, 0.05 to 0.5 part of a catalyst and 10 to 20 parts of a filler. The high-adhesion bio-based polyurethane hot melt adhesive can be obtained by mixing and reacting the raw materials in parts by weight. The performance of the high-adhesion bio-based single-component moisture curing reaction type polyurethane edge sealing hot melt adhesive can meet the use requirements of clients, the use of petroleum-based raw materials is effectively reduced, bio-based raw materials are introduced, and effective support is provided for reproducibility and degradability. The product is suitable for bonding various plates with PVC, PET and other edge sealing materials in the fields of furniture, building materials and the like, and has the characteristics of high initial adhesion, rapid curing, damp and heat resistance and degradability.

The invention discloses a tooth orthodontic bracket EGCG (epigallocatechin gallate)-based functional binder and a preparation method thereof in the field of binders. Comprising the following components in parts by weight: 25 to 30 parts of bisphenol A dimethacrylate, 15 to 20 parts of triethylene glycol dimethacrylate, 0.6 to 0.8 part of camphorquinone, 0.6 to 0.8 part of dimethylaminoethyl methacrylate, 3 to 5 parts of EGCG (epigallocatechin gallate) loaded nanoparticles and 6 to 8 parts of modified chitosan. Through the core structure design of loading EGCG (epigallocatechin gallate) on cationic nano silicon dioxide and coating modified chitosan for multiple times, the dual core advantages of accurate pH response controlled release and safe adaptation to the oral environment are realized in the application of the dental orthodontic bracket adhesive, the effect is supported by a clear mechanism, and release, bacteriostasis and toxicity test data verify that the dental orthodontic bracket adhesive has a good application prospect. The clinical application requirements are completely met.

The application provides an ion exchange resin and a preparation method thereof. The preparation method of the ion exchange resin comprises the following steps: performing a polymerization reaction on a mixed system comprising a support material, an acrylate monomer, a crosslinking agent and an initiator to obtain a composite microsphere; performing a chloromethylation reaction on the composite microsphere, a second solvent and a chloromethylation reagent to obtain a composite chloromicrosphere; and performing an amination reaction or a sulfonation reaction on the composite chloromicrosphere to obtain the ion exchange resin. The ion exchange resin prepared by the preparation method has the advantages of high mechanical strength and strong adsorption capacity. When the ion exchange resin is applied to the purification of a crude terephthalic acid diethylene glycol ester, the ion exchange resin can be stably operated in a water system, the generation of a hydrolysis byproduct is reduced, the product purity is significantly improved, and the industrial purification of waste polyester alcoholysis products is effectively supported.

The invention discloses a brovudine cream for treating herpes zoster and a preparation method of the brovudine cream. Specifically, the invention provides a cream which comprises the following components in percentage by mass: 0.1-5% of bromovudine, 5-45% of an organic solvent, 0.3-10% of an emulsifier, 15-55% of an oil phase matrix and water, the cream is an oil-in-water type cream; and any one of the following conditions is met: (C1) the emulsifier comprises 15-hydroxystearic acid polyethylene glycol ester; (C2) the oil phase matrix comprises glyceryl behenate. The brovudine cream provided by the invention has one or more positive progressive effects of good safety, small side reaction, good stability and good treatment effect.

Through a transesterification reaction in which a predetermined amount of bis(2-hydroxyethyl)terephthalate relative to glycol is fed in a divided or continuous manner, bis(glycol)terephthalate with a low residual amount of an ethylene glycol derivative is prepared, and polyester engineering products or biodegradable polyester products with high crystallinity can be produced therefrom.

Disclosed is a multi-block copolyester ether thermoplastic elastomer foam prepared from an aromatic polyester compound and contains a short-chain structure, a long-chain structure and a residual functional group of a chain extender. The short-chain structure has both an aromatic dicarboxylic acid ethylene glycol ester block structure and an aromatic dicarboxylic acid butylene glycol ester block structure. The long-chain structure has a polyether diol block structure. Based on 100 parts by weight of the multi-block copolyester ether thermoplastic elastomer foam, a content of the polyether diol block structure is 45 parts by weight to 65 parts by weight. The multi-block copolyester ether thermoplastic elastomer foam has a melting point not higher than 170° C. and a melt flow index less than 20 g / 10 min.

The invention belongs to the technical field of polymer compositions, and relates to a mixture for hot in-place recycling of a pavement and a preparation method of the mixture. The invention provides a mixture for hot in-place recycling of a pavement. The mixture comprises a recycling agent and an old asphalt mixture, the regenerant comprises the following components in percentage by weight: 2-5% of an anti-aging agent, 0.5-5% of a surfactant, 3-6% of a ductility increasing agent, 3-6% of phenolic terpene resin, 1-5% of a styrene-maleic anhydride copolymer, 1-5% of polydodecanedioic acid glycol ester, 4-8% of bisphenol A glycerol diacrylate, 20-30% of furfural extract oil and the balance of vegetable oil. The regenerant provided by the invention has better application performance when being used for hot in-place recycling of the pavement, and the old material blending rate is high.

The invention relates to an artificial corneal endothelium sheet as well as a preparation method and application thereof. The artificial corneal endothelium sheet is prepared from the following raw materials: a hydrophilic monomer, a hydrophobic monomer, a cross-linking agent, an ultraviolet absorption monomer, a blue light absorption monomer and an initiator, the hydrophilic monomer comprises a combination of hydroxyethyl methylacrylate and polyethylene glycol methacrylate, and the hydrophobic monomer comprises a combination of methyl methacrylate and isobutyl methacrylate; in the preparation raw materials, the use amount of the hydrophilic monomer is 80-94 wt%, and the use amount of the hydrophobic monomer is 5-19 wt%. According to the artificial corneal endothelium sheet provided by the invention, the proportion and components of the hydrophilic monomer and the hydrophobic monomer are regulated and controlled, so that the obtained artificial corneal endothelium sheet is moderate in water content and has excellent mechanical properties, adhesion performance and swelling stability.

This invention provides a modified activated carbon and its preparation method. The modified activated carbon has oxygen-containing functional groups on its surface, a porous structure, and a specific surface area of ​​1000 m². 2 / g~1600 m 2 / g, total pore volume is 0.65 cm³ 3 / g~0.95 cm 3 / g. The modified activated carbon provided by this invention can significantly improve the adsorption selectivity and adsorption capacity of activated carbon through the synergistic effect of porous structure, oxygen-containing functional groups, and specific specific surface area and total pore volume, while taking into account excellent decolorization effect and good regeneration performance. When applied to the decolorization process of diethylene terephthalate, a product of polyester raw material alcoholysis, it helps to improve the recovery rate of diethylene terephthalate and makes it easier to control the loss rate of diethylene terephthalate at a low level.

The object of the present invention is to provide a polyester that can be manufactured from biomass-derived raw materials and has excellent heat resistance, gas barrier properties, and blow moldability, a polyester composition containing the same, and a bottle using the same that has excellent heat resistance, gas barrier properties, and impact resistance. [Solution] A polyethylene furanoate having an intrinsic viscosity of 0.95 dl / g or more and 1.50 dl / g or less. However, the intrinsic viscosity is measured at 30°C using an Ubbelohde viscometer after dissolving 0.25 g of the polyethylene furanoate in 50 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 50 / 50 (weight ratio) (Huggins constant is assumed to be 0.32).

The application provides a preparation method of co-production of 3-hydroxypropionic acid methyl ester and terephthalic acid dimethyl ester, comprising the following steps: S1, carrying out halogenation reaction on a first material containing terephthalic acid ethylene glycol ester, a halogen-containing compound and an acidic catalyst to obtain halogenated terephthalic acid ethylene glycol ester; S2, carrying out a first reaction on a second material containing the halogenated terephthalic acid ethylene glycol ester, a cobalt catalyst, a ligand and an alkaline additive in the presence of carbon monoxide to obtain 3-hydroxypropionic acid methyl ester and terephthalic acid dimethyl ester. The application can realize high-value conversion of terephthalic acid ethylene glycol ester, and simultaneously efficiently co-produce 3-hydroxypropionic acid methyl ester and terephthalic acid dimethyl ester.