45 results about "P-Aminophenol" patented technology

Disclosed are a resin substrate-based iron oxyhydroxide desulfurizing agent and a preparation method therefor, falling within the technical field of gas purification and treatment. In the present disclosure, sodium percarbonate is used as a raw material to prepare iron oxyhydroxide. Sodium percarbonate serves both as an alkaline precipitant and as an oxidant. P-aminophenol and formaldehyde are subjected to condensation polymerization to form linear phenolic resin, which is then modified with terephthalyl alcohol to connect into a cross-linked network structure resin. The resin is used as a substrate to obtain the resin substrate-based iron oxyhydroxide desulfurizing agent. The preparation method of the present disclosure is simple and achieves a larger sulfur capacity and desulfurization efficiency, making it suitable for the removal of hydrogen sulfide from waste gas.

The invention discloses electronic-grade amine epoxy resin and a preparation method thereof, and belongs to the field of epoxy resin preparation. Aiming at the problems of more by-products and poor performance of the existing epoxy resin preparation, the invention provides the preparation method of the electronic-grade amine epoxy resin, which comprises the following steps: synthesizing a chlorohydrin ether intermediate from p-aminophenol and epichlorohydrin; meanwhile, a catalyst is added in the ring-opening reaction stage; carrying out removal of epoxy chloropropane; alkali metal hydroxide is added for a dehydrochlorination reaction, and a target product is generated in a closed-loop manner; and washing to remove excessive alkali metal hydroxides, and reacting to generate chlorides to obtain the electronic-grade amine epoxy resin. According to the method, the ring opening speed of phenolic hydroxyl is remarkably increased through the catalyst, so that epoxy chloropropane is fully reacted, and residues are reduced; according to the method, excessive epoxy chloropropane is removed, so that side reaction of epoxy chloropropane in a ring closing stage is avoided, generation of by-products is reduced to the greatest extent, operation is simple, and high-quality epoxy resin can be generated.

The invention relates to the technical field of adhesives, and discloses a preparation method of an epoxy resin adhesive, which comprises the following steps: reacting p-aminophenol with diphenyl dichlorosilane under the catalysis of triethanolamine to obtain di (p-aminophenoxy) diphenyl silane; the preparation method comprises the following steps: carrying out Mannich reaction on amino in di (p-aminophenoxy) diphenyl silane, amino in polyether amine, formaldehyde and phenol to obtain the silane-containing polyether amine type benzoxazine intermediate. And finally, uniformly mixing the silane-containing polyether amine type benzoxazine intermediate and epoxy resin, and curing to obtain the epoxy resin adhesive. The prepared silane-containing polyether amine benzoxazine intermediate contains a silane structure and a benzoxazine structure, both the silane structure and the benzoxazine structure have excellent heat resistance, and the epoxy resin adhesive prepared by adding the silane-containing polyether amine benzoxazine intermediate into epoxy resin has excellent heat resistance.

The invention discloses nearly-spherical silver powder formed by self-assembly of silver nanosheets and a preparation method and application of the nearly-spherical silver powder, and belongs to the technical field of micro-nano material preparation. The preparation method comprises the following steps: firstly, adding a dispersing agent solution into a silver precursor compound solution, stirring, then adding a morphology control agent solution, stirring, and finally adding a reducing agent solution for reaction; and after the reaction is completed, the prepared silver powder is washed and dried, and the nearly-spherical silver powder formed by self-assembly of the silver nanosheets is obtained. The nearly-spherical silver powder is formed through self-assembly of the silver nanosheets, the particle size range of the nearly-spherical silver powder is 0.5-2.0 m, the thickness range of the self-assembled silver nanosheets is 10-50 nm, the overall size is uniform, a large number of stacking faults exist on the surfaces of the silver nanosheets, and the silver nanosheets show an excellent catalytic effect in conversion of p-nitrophenol into p-aminophenol.

The invention discloses a method for synthesizing p-aminophenol through electrolytic reduction, which comprises the following steps: carrying out electrolysis by adopting a diaphragm electrolytic cell and taking an oxidation reaction of hydrogen as an anode reaction, taking a reduction reaction of nitrobenzene as a cathode reaction, taking a sulfuric acid aqueous solution as an anode liquid and taking an aqueous solution containing nitrobenzene and sulfuric acid as a cathode liquid, and recycling an electrolysis product in the cathode liquor to obtain the p-aminophenol. According to the invention, the oxidation reaction of hydrogen is used as the anode reaction, a membrane electrode or a gas diffusion electrode is preferably used as the anode, and an iridium oxide anode and a lead anode are not used, so that the cost is effectively reduced or pollution is avoided; the electrolytic reaction is carried out under the condition that the pressure intensity of the anode chamber is not lower than that of the cathode chamber, the electrolytic voltage is reduced by about 1.6-2.3 V (compared with an iridium oxide anode), the energy consumption is obviously reduced, and the yield of p-aminophenol is improved by about 10%.

The invention discloses a low-damping PVC-U electrical conduit and a processing technology thereof, and belongs to the technical field of conduit preparation. The low-damping PVC-U electrical conduit is prepared from the following components in parts by weight: 70 to 80 parts of PVC resin, 30 to 42 parts of light calcium carbonate, 8 to 15 parts of ethylene-vinyl acetate copolymer, 0.5 to 1 part of ethylene bis stearamide, 3 to 6 parts of epoxy compound and 4 to 7 parts of compound stabilizer, the preparation method comprises the following steps: preparing an epoxy compound from ethyl benzoylacetate, 2-(trimethylsilyl) phenyl trifluoromethane sulfonate, p-toluenesulfonyl azide, p-aminophenol, p-toluenesulfonyl chloride, iodobenzene diacetic acid and rhodium diacetate as raw materials, and preparing the compound stabilizer from 2-(2-aminoethoxy) ethanol, 4-fluorophenol and xylene alkane diisocyanate as raw materials. The PVC-U electrical conduit prepared from the substances has the advantages of low damping, excellent stability, excellent mechanical property and excellent aging resistance.

The invention discloses a synthesis method of p-aminophenol derivatives, which comprises the following steps: dissolving a compound A in a mixed solvent of acetonitrile and water, cooling to 0-5 DEG C, then adding an organic and inorganic acid catalyst, reacting at room temperature, distilling to remove the solvent, and then adding citric acid to continuously react to obtain a compound B; the initial raw materials are simple and easy to obtain and easy to purchase and store on a large scale, and the synthesized p-aminophenol compound is high in purity and can meet the requirements of most industrial applications on product purity.

The application discloses an acid-resistant non-noble metal catalyst and a preparation method and application thereof, and particularly relates to the field of acid-resistant metal catalysts, and the preparation method of the acid-resistant non-noble metal catalyst comprises the following steps: step 1, preparation of a carrier; step 2, modification of the carrier; step 3, preparation of an impregnation solution; step 4, preparation of an unactivated catalyst; step 5, activation of the catalyst; and step 6, functionalization of the catalyst. The acid-resistant non-noble metal catalyst prepared by the application can be applied to the synthesis of p-aminophenol from nitrobenzene. The catalyst has good acid resistance and stability, and when applied to the process of preparing p-aminophenol by rearrangement of nitrobenzene hydrogenation, the catalyst has high activity and high selectivity of p-aminophenol under relatively mild reaction conditions, the production conditions are improved, the production cost is reduced, and the product quality is improved.

The invention belongs to the technical field of electrolytic synthesis, and particularly relates to a method for synthesizing p-aminophenol and persulfate. According to the application, a cathode electrocatalytic reduction synthesis process of p-aminophenol and an anode electrocatalytic oxidation synthesis process of persulfate are innovatively coupled, and the cathode current efficiency in the preparation process of p-aminophenol is effectively improved by regulating and controlling anode electrocatalytic temperature parameters. Performance test results show that the cathode current efficiency can reach 81.3%-89.82%, and compared with the cathode current efficiency of 80% or below in a conventional p-aminophenol preparation process, the technical breakthrough exceeding the expectation is achieved, and the unexpected technical effect is shown.

The invention discloses a synthesis method of 4, 4 '-bis (4-aminophenoxy) biphenyl, which comprises the following steps: (1) carrying out salt forming reaction on p-aminophenol and inorganic strong alkali to obtain a suspension containing p-aminophenol salt; the salt forming reaction is carried out in the presence of sodium hydrosulfite; and (2) reacting the p-aminophenol suspension obtained in the step (1) with 4, 4 '-dihalogenated biphenyl to obtain 4, 4'-bis (4-aminophenoxy) biphenyl. The method provided by the invention not only avoids the problem of high production cost caused by the need of a noble metal catalyst for catalytic hydrogenation in the prior art, but also avoids the problems of more three wastes and environmental unfriendliness in the prior art, and has the advantages of low production cost, high safety, environmental friendliness and suitability for industrial mass production.

The present invention relates to a method for preparing a compound of formula (I), where X represents CR23 or N; Y represents CR24 or N; R1 represents H or a COR3 group; R21, R22, R23 and R24 independently represent a hydrogen, a halogen, a nitro group, a cyano group, a CF3 group, a (C1-C6) alkyl group, or a COOH, COR4, COOR5 or CONR6R7 group; R3, R4 and R5 independently represent a (C1-C6) alkyl; and R6 and R7 independently represent a hydrogen or a (C1-C6) alkyl group.

In order to increase the total light transmittance while maintaining a high haze value of the thermoplastic liquid crystal polymer, a thermoplastic liquid crystal polymer molded body is produced with a haze value of 99% or more, a coefficient of thermal expansion of 16 to 27 ppm / °C, and a correlation between the absorption coefficient (ε) and the thickness (x) satisfying ε ≤ 0.21x<supgt;‑0.55< / supgt>. The thermoplastic liquid crystal polymer may be a polyester containing repeating units derived from a substance selected from the group consisting of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid; 6-hydroxy-2-naphthoic acid, terephthalic acid, and p-aminophenol; p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and terephthalic acid; 6-hydroxy-2-naphthoic acid, terephthalic acid, p-aminophenol, isophthalic acid, hydroquinone, and naphthalenedicarboxylic acid; and p-hydroxybenzoic acid, terephthalic acid, and 4,4'-dihydroxybiphenyl.

The application relates to application of a solid acid catalytic catalyst in preparation of p-aminophenol through nitrobenzene hydrogenation. The application comprises the following steps: adding a solid acid catalyst, cetyltrimethylammonium bromide, deionized water and nitrobenzene into a high-pressure reactor, and reacting under magnetic stirring for 0-24 hours at 25-150 DEG C to obtain the product p-aminophenol. The activated carbon for preparing the solid acid catalyst is coconut shell activated carbon, the series of activated carbon has the advantages of large specific surface area, rich micropores and strong adsorption capacity, and the coconut shell activated carbon solid acid with different acidities is prepared to catalyze the nitrobenzene hydrogenation reaction. The application avoids using traditional liquid acid sulfuric acid to provide the acidic active sites required by the reaction, greatly alleviates the problems of equipment corrosion, environmental unfriendliness, catalyst and product separation difficulty and the like. The catalyst used has good performance, the conversion rate of nitrobenzene is up to 100%, and the yield of p-aminophenol is up to 81.17%.

The present invention provides a preparation method of a phosphorus-containing compound modified imido epoxy resin, comprising the following steps: step 1: reacting phenolphthalein and p-aminophenol to obtain an imido-containing polyphenol compound; step 2: reacting the imido-containing polyphenol compound and epichlorohydrin to obtain an imido-containing multifunctional epoxy resin; step 3: reacting the imido-containing multifunctional epoxy resin with a phosphorus-containing compound to obtain a phosphorus-containing compound modified imido epoxy resin. Imide groups and epoxy groups are gradually introduced into the phosphorus-containing compound, and the generated phosphorus-containing compound modified imido epoxy resin contains more benzene rings and imide structures, thereby improving the heat resistance of the epoxy resin. The N element in the imide group and the P element in the phosphorus-containing compound utilize the N-P synergistic effect to enhance flame retardancy while reducing phosphorus content, thereby reducing the water absorption rate of the resin.

A prepreg having excellent processability and handleability and that can be processed into a cured product with high heat resistance is described along with a method to produce such a prepreg without being restricted by the types and contents of the matrix resin components used, where the prepreg includes at least components [A] to [D] as defined below and a preliminary reaction product that is a reaction product of the component [B] and the component [C]: [A] carbon fiber, [B] epoxy resin comprising a m- or p-aminophenol epoxy resin [b1] and either a glycidyl ether epoxy resin or a glycidyl amine epoxy resin [b2] that has two or more glycidyl groups in a molecule, [C] curing agent, and [D] thermoplastic resin.

The invention belongs to the technical field of acetaminophen medicine synthesis, and particularly relates to a preparation method of acetaminophen, which is characterized in that acetaminophen and glacial acetic acid are subjected to one-step amidation reaction in a negative-pressure low-temperature reaction system to synthesize acetaminophen. The method solves the problems of high acetaminophen preparation temperature, easy raw material oxidation, low crude product quality, high cost and environmental protection potential safety hazard.

The invention relates to the field of epoxy resin, in particular to flame-retardant high-Tg fast-curing epoxy resin for PCM (pulse code modulation) and a preparation method of the flame-retardant high-Tg fast-curing epoxy resin. The raw materials comprise the following components in parts by weight: 100 parts of multifunctional epoxy resin; the polyfunctional epoxy resin is a mixture of p-aminophenol epoxy resin and 4, 4-diaminodiphenylmethane epoxy resin, the glass transition temperature of the polyfunctional epoxy resin is 240-250 DEG C, and the epoxy equivalent is 100-125; 5 to 10 parts of a PES toughening agent; 15 to 20 parts of a flame retardant; 0.3 to 0.5 part of fumed silica; 5.5 to 7 parts of a dicyandiamide curing agent; and 1.5-3 parts of a urea accelerator. The epoxy resin prepared by the preparation method disclosed by the invention not only has relatively high glass transition temperature, but also has good mechanical properties, toughness and flame retardance and is short in curing time; meanwhile, the preparation raw materials are easy to obtain, and the process is simple.

A porous material is used as a working electrode, a hydrophobic layer of the working electrode faces a raw material solution containing nitrobenzene, and a reaction layer of the working electrode is electrolyzed by a sulfuric acid aqueous solution to synthesize p-aminophenol. According to the method, a surface active agent and nitrobenzene do not need to be added into the electrolyte, a p-aminophenol solution with the high concentration is synthesized, the separation and purification steps of the product are optimized, compared with a traditional method, the concentration of a sulfuric acid aqueous solution used in the traditional method is reduced to 10% from 20%, meanwhile, the reaction voltage is also reduced by 0.4 V, and the method is suitable for industrial production. The production cost and the energy consumption are reduced, the environmental pollution is reduced, and the current efficiency is improved by nearly 25% and the selectivity is improved by 10%.

The invention discloses a graphite film-p-aminophenol-copper composite material and a preparation method thereof, and belongs to the field of metal-based composite material thermal management, and the composite material is structurally characterized in that phenol molecules are introduced to the upper and lower surfaces of a flake graphite film,-OH in phenol and copper ions are coordinated, and the graphite film-p-aminophenol-copper composite material is prepared. The preparation method of the copper-graphite film-copper composite material comprises the following steps: treating the surface of the flaky graphite film, putting the flaky graphite film into absolute ethyl alcohol containing p-aminophenol, magnetically stirring under the protection of nitrogen, adding isoamyl nitrite, magnetically stirring, and reacting at a constant temperature, so as to obtain the copper-graphite film-copper composite material. Taking out the flake graphite film, washing and drying in vacuum; and the dried flake graphite film is electroplated with copper, and the obtained graphite film-p-aminophenol-copper composite material is good in in-plane thermal conductivity and good in bending performance.

The invention provides a biosensor, a nucleic acid detection and typing system based on a CRISPR system, a detection method and application, and belongs to the technical field of biological detection, alkaline phosphatase is adopted for catalyzing hydrolysis of p-aminophenyl phosphate to obtain p-aminophenol, the p-aminophenol is used for reducing silver ions, metal silver is deposited on the surfaces of gold nanoparticles, and the gold nanoparticles can be used for detecting the nucleic acid. Compared with a traditional Cas12a detection method combining ALP mediated p-nitrophenyl phosphate hydrolysis, the CRISPR / Cas12a biosensing strategy combining ALP has the advantages that the sensitivity is improved by 10,000 times, target DNA can be detected through naked eyes, the detection limit is as low as 300 aM, and the potential of no instrument application is shown.

A chemical detoxification method of p-nitrophenol comprises the following steps: S1, adding p-nitrophenol solution, reducing agent and carbon-doped boron nitride non-metal photocatalyst into a quartz reaction tube, stirring uniformly, discharging oxygen and maintaining atmosphere by nitrogen; S2, placing the mixed reaction system into a light reaction instrument, opening a xenon lamp as a light source, opening circulating water, and reacting for 8-60 min at normal temperature; S3, filtering the reaction liquid, and obtaining low-toxicity p-aminophenol compound. The present application uses carbon-doped boron nitride as a non-metal photocatalyst, ethanol or glucose as a reducing agent, and a xenon lamp to simulate sunlight, and reduces p-nitrophenol to p-aminophenol in a nitrogen atmosphere, without using sodium borohydride and metal or noble metal-containing catalysts, and realizing green and efficient detoxification of p-nitrophenol.

This invention provides a halogen-free resin composition and its applications. The halogen-free resin composition comprises the following components in parts by weight: 100 parts by weight of epoxy resin, including at least epoxidized polybutadiene resin; 50-100 parts by weight of p-aminophenol-modified maleimide resin, wherein the weight-average molecular weight of the p-aminophenol-modified maleimide resin is 500-800; and 70-90 parts by weight of benzoxazine resin. The halogen-free resin composition of this invention has a high heat resistance (Tg), excellent heat resistance, effectively reduces the warpage height of resin composition products, has a low coefficient of thermal expansion, and improves the reliability of laminated sheets with polyphenylene ether resin systems or hydrocarbon resin systems. It also provides excellent processability for prepregs and printed circuit board laminates.

The invention provides a device and method for producing paracetamol through acetylation of p-aminophenol by multiple serially connected kettles.The device comprises a first-stage reaction kettle, a second-stage reaction kettle and a third-stage reaction kettle which are sequentially connected in series, a gas phase outlet in the top of each stage of reaction kettle is connected with a gas phase balance homogenizer, and an outlet of the gas phase balance homogenizer is connected with an inlet of a rectifying tower; a tower kettle outlet of the rectifying tower is connected with the first-stage reaction kettle. The gas phases of the reactors connected in series are connected through the gas phase balance homogenizer, and the rectifying tower is used for separating moisture in the gas phase reaction product, so that the p-aminophenol acetylation reaction is promoted to be carried out in the forward direction, unreacted acetic acid flows back to the reaction kettle for continuous reaction, the gas phases of the reactors can be balanced, and the yield of the p-aminophenol acetylation reaction is improved. The gas pressure and the gas flow of each stage of reaction are stable, the feeding gas flow of the rectifying tower is stable, the stability of continuous production is improved, the reaction conversion rate is high, the product yield is relatively high, and the industrial application prospect is relatively good.

The invention provides a preparation method of bio-based high-performance epoxy resin. The preparation method comprises the following steps: firstly, taking bio-based aldehydes and p-aminophenol as raw materials, and reacting at 50 DEG C for 3 hours to obtain a bio-based aldehyde Schiff base-containing compound; secondly, reacting the bio-based aldehyde compound containing the Schiff base with epoxy chloropropane at 80 DEG C for 6 hours to obtain a bio-based aldehyde epoxy monomer containing the Schiff base; methyl tetrahydrophthalic anhydride is used as a curing agent, and the bio-based aldehyde Schiff base-containing epoxy monomer and bisphenol A epoxy resin are mixed according to a certain proportion to obtain the bio-based high-performance epoxy resin. The bio-based aldehyde epoxy resin researched and developed by the invention not only has innovativeness in technology, but also has wide application potential in practical application. In the field of traditional electrical insulation, the method is expected to become a powerful competitor in the market, and provides beneficial reference for sustainable development and green chemistry.

The invention provides a method for continuous crystallization of p-aminophenol, and relates to the technical field of fine chemical crystallization, and the method comprises the following steps: adding a p-aminophenol stock solution into an evaporator for concentration; continuously adding the concentrated mother liquor into a primary DTB crystallizer for cooling crystallization; crystal mush in the first-stage DTB crystallizer is continuously added into the second-stage DTB crystallizer to be continuously cooled and crystallized; crystal mush discharged from the secondary DTB crystallizer is continuously added into a thickener; feeding crystal mush at the bottom of the thickener into a centrifugal machine, cleaning and drying to obtain a product, and completing two-stage continuous crystallization of p-aminophenol; clear liquid at the upper part of the thickener and centrifugal filtrate are returned to the mother liquor tank, one part is discharged, and the other part is returned to be continuously concentrated. The continuous crystallization method of p-aminophenol solves the problems of product particle crushing, poor particle size distribution, much fine powder, low bulk density and product scaling. The continuous crystallization production of p-aminophenol is realized, and the problem of batch-to-batch difference of p-aminophenol crystallization products is solved.

The invention discloses application of a B-CDs (at) EuBTC composite material. The B-CDs (at) EuBTC composite material is used for qualitative and / or quantitative detection of p-aminophenol. The B-CDs (at) EuBTC composite material comprises a metal organic framework EuBTC and carbon dots loaded on the metal organic framework EuBTC, B-CDs represent blue light carbon dots, and BTC represents a ligand trimesic acid. The B-CDs (at) EuBTC composite material provided by the invention has excellent solvent stability, realizes ratio type fluorescence sensing on a biomarker p-aminophenol (PAP), has a detection limit of 0.65 mu M, and has the characteristics of good stability, high sensitivity, strong anti-interference performance, short response time and good cycle performance.

The present invention discloses the application of a palladium-doped nanoporous nickel / nickel oxide composite material in the catalytic hydrogenation reaction of p-nitrophenol. The palladium-doped nanoporous nickel / nickel oxide composite material is directly obtained through chemical corrosion of an AlNiPd alloy strip. The composite material has a three-dimensionally interconnected porous structure, and palladium is dispersed in the nickel / nickel oxide matrix at the sub-nanometer scale. The material exhibits excellent solution catalytic hydrogenation activity and can achieve the hydrogenation reduction reaction of substrates with sodium borohydride solutions of different concentrations. Therefore, the material involved in this patent is simple to prepare, has outstanding catalytic hydrogenation reaction activity, and has good application prospects in the fields of p-nitrophenol wastewater treatment and p-aminophenol preparation.

The invention relates to the technical field of power device packaging, in particular to a low-thermal-expansion high-temperature-resistant epoxy resin composition and a preparation method thereof.The low-thermal-expansion high-temperature-resistant epoxy resin composition is prepared from, by weight, 12-25% of epoxy resin, 5-10% of curing agent, 0.5-5% of diluent, 0.1-0.5% of coupling agent and 75-90% of modified silicon dioxide, the organic solvent is any one of 2, 2-bis (4-hydroxyphenyl) propane, 4, 4 '-dihydroxydiphenylmethane, 4, 4'-dihydroxydiphenyl sulfone, 2, 2-bis (3, 5-dibromo-4-hydroxyphenyl) propane, 2, 2-bis (4-hydroxycyclohexyl) propane, 4, 4 '-dihydroxybiphenyl, 4, 4'-dihydroxydiphenyl ether, p-aminophenol, m-aminophenol, 4-hydroxyaniline and 3, 4-epoxy cyclohexylmethanol. The low-thermal-expansion and high-temperature-resistant epoxy resin composition disclosed by the invention has relatively low thermal expansion coefficient, relatively high glass-transition temperature and relatively high mechanical properties, meets the high-temperature service requirements of power devices, and is particularly suitable for scenes with requirements on high strength, high toughness and high stability.

The application belongs to the technical field of electrochemical sensors, and discloses a kind of ion liquid gel microsphere composite electrode loaded with MXene and its preparation method and application in electrochemical detection of p-aminophenol.The preparation method is as follows: prepare a few-layer MXene aqueous solution, prepare PMMA / BMIMPF6 gel microsphere powder aqueous dispersion, add PMMA / BMIMPF6 gel microsphere dispersion to MXene aqueous solution, stir, ultrasonic oscillation, filter, wash, collect filter cake, freeze-drying to prepare PMMA / BMIMPF6 / MXene powder, take the above-mentioned powder and disperse it in anhydrous ethanol, ultrasonic oscillation, drop to carbon cloth, air dry, place at room temperature, make the electrode material and carbon cloth fully combined, and prepare PMMA / BMIMPF6 / MXene / CC composite electrode.The application not only provides a new electrochemical sensing scheme for efficient, rapid and economical detection of phenolic pollutants such as p-aminophenol in water environment, but also provides a new idea for the design and development of functional composite electrochemical electrode materials.

This invention relates to a method for synthesizing p-aminophenol type epoxy resin, belonging to the field of epoxy resin preparation technology. By adding n-butanol and / or cyclopentyl methyl ether to the reaction system, this invention can effectively reduce the total chlorine content of the p-aminophenol type epoxy resin product and improve its purity. The total chlorine content of the p-aminophenol type epoxy resin synthesized by this invention is less than 500 ppm. In this invention, n-butanol and cyclopentyl methyl ether are slightly soluble in water. During the cyclization reaction stage, when sodium hydroxide solution is used as a catalyst, n-butanol and cyclopentyl methyl ether can form a transition phase, promoting the uniform migration of sodium hydroxide from the aqueous phase to the interface between the two phases to participate in the reaction. This promotes the stable progress of the cyclization reaction, reduces the occurrence of side reactions, thereby reducing the total chlorine content of the p-aminophenol type epoxy resin and improving the synthesis yield of the p-aminophenol type epoxy resin.