44 results about "Xylenol" patented technology

The embodiment of the invention provides a method for separating various phenols from cresol containing 2, 6-xylenol, which utilizes the characteristics that 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and isobutene can only generate mono-tert-butylated phenol, m-cresol, p-cresol and o-ethyl phenol, and o-cresol and isobutene can generate di-tert-butylphenol, and contains 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and 2, 4-xylenol. According to the method, cresol containing 2, 6-xylenol is subjected to the steps of monoalkylation, rectification, dialkylation, rectification, dealkylation, rectification and the like to realize separation of various phenols, so that the problem that the quality of m-cresol and p-cresol is influenced by 2, 6-xylenol when cresol extracted from medium-low temperature phenol-containing coal tar is separated is solved.

The invention belongs to the technical field of coatings, and particularly relates to a high-flash-point phenolic anticorrosive coating as well as a preparation method and application thereof. The high-flash-point phenolic anticorrosive paint is prepared from the following raw materials in parts by mass: 40 to 70 parts of xylene phenolic resin, 30 to 60 parts of hyperbranched polyester modified phenolic resin, 10 to 15 parts of silicone acrylic emulsion, 5 to 10 parts of modified glass fiber, 5 to 10 parts of pigment, 3 to 8 parts of solvent, 3 to 8 parts of light stabilizer-beta-cyclodextrin inclusion compound and 1 to 3 parts of drier. A coating layer obtained by the phenolic anticorrosive paint provided by the invention has good adhesive force, flexibility, long-term salt fog resistance, weather resistance and heat and humidity resistance.

The invention belongs to the technical field of organic separation, and particularly relates to a method for separating phenol monomers from mixed phenol. The method for separating the phenol monomer from the mixed phenol comprises the following steps: mixing and heating the mixed phenol, an acid catalyst, first phenol and zirconium phosphate for reaction to obtain a cracking product; adding sulfuric acid into the cracking product to form a reaction solution, and after the reaction is finished, filtering to obtain a cracking reforming product of the mixed phenol; and then rectifying and purifying the cracking reforming product in sequence. The method has the beneficial effects that ethyl in 2-ethyl-6-cresol in alkylphenol and isopropyl / propyl in o-isopropyl phenol are removed at a high temperature, 2, 4-xylenol and 2, 5-xylenol are subjected to transposition to obtain 3, 5-xylenol and mixed xylenol with high content of 2, 5-xylenol, and the content of 2, 5-xylenol is increased. And then controlling the temperature to be reduced to a certain temperature, carrying out step-by-step reaction on excessive phenol, ethylene and propylene in the presence of an acidic material catalyst, and rectifying to obtain products such as o-isopropylphenol and p-isopropylphenol.

A fluid catalytic cracking process for p-cresol dimer to produce valuable phenolic monomers, i.e., 2-methyl phenol, 4-methyl phenol, 2,3-xylenol, and phenol, uses an equilibrium catalyst (E-cat) generated in the petroleum fluid catalytic cracking (FCC) unit. The p-cresol dimer can be processed under relatively mild conditions, while maximizing desired and minimizing undesired products. The process may include charging an equilibrium fluid catalytic cracking catalyst; heating to a predetermined cracking temperature and pressure; (c) charging a p-cresol dimer feed; (d) contacting the p-cresol dimer with the equilibrium fluid catalytic cracking catalyst; (e) condensing resulting phenolic monomer vapors to obtain phenolic monomer liquid and fluidization gas; (f) separating the phenolic monomer liquid from the fluidization gas; (g) collecting the separated phenolic monomer liquid; (h) separating the collected phenolic monomer liquid individual phenolic monomers; and (i) recycling any unconverted p-cresol dimer into the fluidized bed reactor.

The invention belongs to the technical field of organic synthesis, and particularly relates to an improved gemfibrozil preparation method which comprises the following preparation steps: S1, preparing 2, 5-xylenol sodium salt; s2, preparing a gemfibrozil crude product; according to the improved gemfibrozil preparation method provided by the invention, the use of a harmful solvent, a phase transfer catalyst and the like is avoided, and the process flow and the reaction conditions are optimized, so that the reaction efficiency is remarkably improved, and the yield and the purity of the prepared gemfibrozil are improved. The operation is simple, and industrial production is facilitated.

The invention belongs to the field of catalysts, and particularly relates to a catalyst, a preparation method thereof and a method for preparing o-cresol and 2, 6-xylenol by using the catalyst. The molar ratio of the iron element to the vanadium element to the zirconium element to the indium element in the catalyst is 100: (2-15): (1-6): (0.2-4), the preparation process is simple, and the raw material cost is low. The catalyst provided by the invention has the characteristics of high conversion rate, high ortho-cresol selectivity and high stability in the reaction of preparing ortho-cresol and 2, 6-xylenol through phenol methylation, the phenol conversion rate can reach 90% or above, the ortho-cresol selectivity can reach 50% or above, and the one-way life of the catalyst exceeds 5700 hours.

The utility model discloses a xylenol decoloring system, which is characterized in that a liquid outlet of a xylenol reboiler is connected with a liquid inlet of a preheater, a liquid outlet of the preheater is connected with a liquid inlet of a xylenol tower, and a reflux outlet at the bottom of the xylenol tower is connected with a reflux inlet of the xylenol reboiler; an exhaust port of the xylenol reboiler is connected with a gas inlet of the xylenol tower, a tower top gas outlet of the xylenol tower is connected with a gas inlet of the cooler, a liquid outlet of the cooler is connected with a liquid inlet of the xylenol return tank, and a liquid outlet of the xylenol return tank is connected with a liquid inlet of the xylenol buffer tank. A liquid outlet of the xylenol buffer tank is connected with a liquid inlet of the xylenol reboiler; and the liquid outlet of the xylenol buffer tank is also connected with the liquid inlet of the decolorized xylenol storage tank. After the xylenol produced by the xylenol tower is temporarily stored in the xylenol buffer tank, the decolorizing agent is added for decolorizing treatment, so that the product quality of the xylenol is improved, the decolorized xylenol is obtained, the product income is improved, and the product competitiveness is enhanced.

The invention discloses a heat insulation cotton felt. The heat insulation cotton felt is formed by curing and drying glass fibers sprayed with an adhesive. The adhesive is prepared from the following components in parts by weight: a modified phenolic resin solution, an organic silicon modified methyl methacrylate pre-polymerized solution, water, pentaerythritol, methyl emulsified silicone oil and dioctyl phthalate, the modified phenolic resin solution is obtained by the following steps: adding formaldehyde into a mixed solution consisting of phenol, xylenol and lignin, and reacting at the temperature of 40-60 DEG C to obtain a first solution; adding 5-15 parts by weight of a sodium hydroxide aqueous solution into the first solution to adjust the pH value of the first solution to 8-9, heating, cooling to 35-50 DEG C, adding sulfuric acid, and stirring to obtain a second solution; 20-40 parts of hexamethylol melamine is added into the second solution in batches. According to the heat insulation cotton felt, the resilience force of the glass fiber cotton felt is kept, and meanwhile the hydrophobic performance of the heat insulation and sound insulation module is improved.

The invention discloses a method for extracting o-isopropyl phenol and 2-ethyl-6-cresol, which comprises the following steps: adding a 2, 4 / 2, 5-xylenol mixture containing o-isopropyl phenol and 2-ethyl-6-cresol, a catalyst and diisobutylene into a reactor for reaction; the method comprises the following steps of: sampling and analyzing to be qualified, filtering, carrying out low-vacuum reduced pressure distillation on filtrate to obtain diisobutylene and the previous component for mechanical application, and then carrying out improved vacuum reduced pressure distillation to sequentially obtain 99% of 2, 5-xylenol, 99% of 6-isooctyl-2, 4-xylenol and 99% of 4-isooctyl-2-ethyl-6-cresol and a kettle residue of 4, 6-diisooctyl-2-isopropyl phenol; the method comprises the following steps: respectively decomposing 2, 4-isooctyl-2-ethyl-6-cresol and 4, 6-di-tert-butyl-2-isopropyl phenol under the catalysis of acid to obtain crude 2-ethyl-6-cresol and o-isopropyl phenol, mechanically applying corresponding diisobutylene obtained by decomposition to next reaction, and rectifying again to obtain 99% 2-ethyl-6-cresol and o-isopropyl phenol; the 2, 4 / 2, 5-xylenol contains cresol, m-p-cresol, m-p-ethyl phenol and other cresol, so that the influence on separation and extraction of o-isopropyl phenol and the like is small, and the process practicability is high.

The invention belongs to the technical field of coalification and synthesis and separation of organic products, and particularly relates to a method for separating a m-cresol / p-cresol / o-ethyl phenol mixture and producing a byproduct 2, 4-xylenol. The method comprises the following steps: carrying out fixed bed catalytic methylation reaction on a m-cresol and p-cresol mixture raw material with high o-ethyl phenol content and methanol, rectifying methylation reactants to obtain 2, 4, 6-tricresol and a mixture of 2, 3, 6-tricresol and 2-ethyl-4, 6-xylenol, and carrying out catalytic deethylation reaction on the 2, 4, 6-tricresol and the mixture of 2, 3, 6-tricresol and 2-ethyl-4, 6-xylenol to obtain the 2, 4, 6-tricresol. The method comprises the following steps of: adding a mixture of 3, 4-xylenol, 2, 4, 6-tricresol and 2, 3, 6-tricresol, and rectifying again to obtain 2, 4-xylenol, 2, 4, 6-tricresol and 2, 3, 6-tricresol, so that the application field of m-cresol and p-cresol is expanded, and the separation of m-cresol and p-cresol with high ethyl phenol content extracted from tar phenol is realized.

The present invention belongs to the technical field of gasoline additives, and relates to a gasoline octane number additive, a preparation method thereof and an application. By weight, the gasoline octane number additive comprises: 35-55 parts of mixed heavy aromatics, 18-35 parts of p-xylene, and 5-20 parts of 3,5-xylenol. Among them, the mixed heavy aromatics comprise: 20-35 parts of mesitylene, 20-30 parts of pseudocumene, 15-25 parts of durene, 10-20 parts of dicyclopentadiene, and 5-10 parts of naphthalene. The gasoline octane number additive further comprises 1-6 parts of a regulator. The preparation method of the gasoline octane number additive comprises: mixing each component by mass, stirring, and standing to obtain the gasoline octane number additive. The product of the present invention can effectively improve the gasoline octane number, and has the advantages of simple process, good anti-knock performance, unrestricted usage amount, and environmental protection.

The invention discloses a continuous treatment system and method for low-temperature small cresol in coal gasification, and relates to the technical field of treatment systems, and the continuous treatment system comprises an alkali washing unit, an oxidation deodorization unit, a decoloration deodorization unit, an anti-oxidation unit, a rectification unit and an improvement unit. According to the continuous treatment system and method for the medium-low-temperature small cresol in coal gasification, through cooperative arrangement of the alkali washing unit, the oxidation deodorization unit, the decoloration and deodorization unit, the anti-oxidation unit, the rectification unit and the improvement unit, the effects of desulfurization, denitrification, decoloration, deodorization, organic matter removal and anti-oxidation on the medium-low-temperature small cresol in coal gasification can be achieved; the quality of phenol, o-cresol, m-cresol, p-cresol and xylenol products separated from medium and low temperature small cresol is greatly improved, the product quality is ensured, meanwhile, the stability of the products in the coal gasification medium and low temperature small cresol refining process is changed, and the oxidation resistance is improved.

The present invention discloses a method for producing methylphenol by gas-phase alkylation of phenol and methanol in a fixed-bed adiabatic reactor. Phenol and methanol are separately vaporized, mixed in a certain mass ratio, and then introduced into a fixed-bed adiabatic reactor containing a catalyst. The phenol and methanol undergo a gas-phase alkylation reaction to produce o-cresol, m-cresol, p-cresol, and some xylenols. By controlling the mass ratio of phenol and methanol, the purpose of controlling the adiabatic temperature rise is achieved. The products generated by the reaction are subjected to rectification and separation to obtain a mixture of o-cresol, m-cresol, and p-cresol, as well as products such as xylenol. Compared with the existing technology, the method for producing methylphenol by gas-phase alkylation of phenol and methanol in a fixed-bed adiabatic reactor provided by the present invention has the advantages of a simple reaction process, high catalyst loading efficiency, and no addition of inert circulating materials. It also achieves the advantages of reducing equipment investment, energy consumption, and wastewater.

The invention discloses a process for preparing phenol products from 2, 4-xylenol / 2, 5-xylenol, which comprises the following steps: adding a 2, 4-xylenol / 2, 5-xylenol mixture into a reactor added with silicon-aluminum-chromium oxide and an acidic catalyst, carrying out dealkylation reaction at 280-400 DEG C, removing propylene, ethylene and the like from o-isopropyl phenol, 2-methyl-6-ethyl phenol and the like in the reaction, and then carrying out dealkylation reaction to obtain the phenol products. The mixed phenol and olefin mixture contains phenol, cresol and 2, 4-xylenol / 2, 5-xylenol; the mixture is rapidly cooled and liquefied, olefin is discharged, rectification is carried out, and high-purity 2, 5-xylenol / 2, 4-xylenol without o-isopropyl phenol, 2-ethyl-6-cresol and the like is obtained; the preparation method comprises the following steps: reacting propylene with m-cresol by controlling the reaction temperature to obtain thymol, 4-isopropyl-3-cresol and the like, and reacting ethylene with phenol to obtain o-ethyl phenol and p-ethyl phenol; according to the method, ethyl in 2-ethyl-6-cresol and isopropyl / propyl in o-isopropyl phenol in alkylphenol are removed at high temperature, a purified 2, 5 / 2, 4-xylenol product is obtained, and a high-purity product is produced.

The invention relates to a method for producing 2, 5-xylenol by isomerization of 2, 6-xylenol, which comprises the following steps: preheating the 2, 6-xylenol, mixing the preheated 2, 6-xylenol with diluent gas, continuously passing through an isomerization catalyst bed, and carrying out gas-phase reaction under the reaction conditions that the reaction temperature is 250-350 DEG C and the feed weight space velocity is 0.5-20h <-1 > to generate the 2, 5-xylenol. The isomerization catalyst is prepared by taking MCM-22, ZSM-5, MCM-41 and MCM-49 molecular sieves as active components and modifying the active components. 2, 6-xylenol is used as a raw material, the selectivity of 2, 5-xylenol can reach 90%, and the catalyst is good in stability. The catalyst is free of equipment corrosion in the production process, is an environment-friendly catalyst, and has a good industrial application prospect.

The invention discloses a phenol separation coupling catalysis purification method, and relates to the technical field of fine chemical separation and purification. According to the method, a metal oxide modified H-ZSM-5 molecular sieve is used as a catalyst, a coupling reaction and a separation process are carried out in a catalytic rectifying tower, and two core processes are synchronously completed: 1, impurities such as phenol and o-cresol in raw materials are subjected to a targeted O-alkylation reaction with methanol, and the impurities difficult to separate are efficiently converted into an alkylate easy to rectify; and 2, precise fractionation is synchronously realized, heavy ether products are extracted and removed from a side line, and target products mainly comprising high-purity 2, 6-xylenol and 2, 4-xylenol are obtained in a tower kettle. Through integrated design of targeted conversion and synchronous separation, key impurities are removed with high selectivity, the process is simplified, equipment investment and energy consumption are reduced, non-target side reactions are avoided, and high selectivity, high yield, process economy and product quality of target xylenol are considered.

The application discloses a preparation method of methyl xylene phenol blue free acid, which comprises the following steps: (1) adding 2-sulfobenzoic acid cyclanth and 2, 5-dimethyl phenol into a pressure-resistant reaction container, and performing a methylation reaction under the catalysis of a proton acid, wherein the reaction temperature is 100-120 DEG C, the reaction time is 10-20 h, water is added after the reaction is completed, heating is performed to 50-70 DEG C, and the temperature is kept for 1-3 h, and then hot filtration is performed to obtain dimethyl phenol blue; (2) in a reaction container, sodium iminodiacetic acid dihydrate is heated to 40-60 DEG C under the condition of glacial acetic acid, and then cooled to room temperature and stirred, and then dimethyl phenol blue and formaldehyde solution are added, and then stirring is performed at room temperature for 1-3 h, and then heating is performed to 40-60 DEG C to react for 6-10 h, and then hot filtration is performed, and then the reaction solution is added into the first reaction solution, and then crystallization is performed, and then filtration is performed to obtain methyl xylene phenol blue free acid. The application has the advantages of simple operation, convenient source, high product purity and good application prospect.

The invention discloses a positive panel photoresist and a photoetching process, and belongs to the technical field of photoetching. The photoresist comprises linear phenolic resin, a diazo photosensitizer, an additive and a solvent, the weight-average molecular weight of the linear phenolic resin is 3000-12000, and the linear phenolic resin comprises A-type phenolic resin and / or B-type phenolic resin; groups participating in polycondensation in the A-type phenolic resin comprise at least one of p-cresol groups and m-cresol groups, 2, 5-xylenol groups and 3, 5-xylenol groups, the molar percentage of the 2, 5-xylenol groups is greater than 0 and less than or equal to 50%, and the molar percentage of the 3, 5-xylenol groups is greater than 0 and less than or equal to 50%; the groups participating in polycondensation in the B-type phenolic resin comprise p-cresol groups and m-cresol groups. The photoresist has excellent corrosion resistance and adhesiveness at the same time.

The invention belongs to the technical field of catalysts, and particularly discloses a method for preparing cresol by catalyzing xylenol and phenol in the presence of a pyridine acidic ionic liquid in the presence of hydrogen, and the cresol (ortho-position, meta-position and para-position mixed cresol) is prepared by taking the xylenol and the phenol as raw materials and taking the pyridine acidic ionic liquid as a solvent and a catalyst in the presence of the hydrogen. According to the reaction process conditions, the hydrogen pressure ranges from 1 MPa to 3 MPa, the reaction time ranges from 2 h to 8 h, the reaction temperature ranges from 250 DEG C to 350 DEG C, the ratio of phenol to xylenol (mole) is 1-4, the ratio of pyridine acidic ionic liquid to raw materials (phenol and xylenol) is 10 / 90-30 / 70 (wt), the conversion rate of the xylenol in the reaction can reach 75.68%, and the selectivity of the xylenol can reach 87.58%. The pyridine acidic ionic liquid can be recycled.

The invention belongs to the technical field of coal coking and production and separation of organic chemical products, and particularly relates to a method for producing o-methyl benzene alkyl ether and 2, 6-dimethyl benzene alkyl ether. The method for producing o-methyl benzene alkyl ether and 2, 6-dimethyl benzene alkyl ether, provided by the invention, comprises the following steps: (1) adding o-cresol post-fraction, a catalyst and an alkylating agent into a reactor for etherification reaction; and (2) after the etherification reaction is finished, carrying out standing layering, toluene extraction and washing treatment, carrying out normal pressure rectification on the obtained material layer to recover toluene for reuse, then carrying out reduced pressure rectification, and collecting o-methyl benzene alkyl ether, a middle fraction, 2, 6-dimethyl benzene alkyl ether and rectification kettle residues under chromatographic analysis. An alkylating agent is adopted to perform etherification reaction with phenol substances such as o-cresol and 2, 6-xylenol, boiling point difference can be increased, effective separation is performed, and then rectification is performed to obtain o-toluene alkyl ether and 2, 6-xylene alkyl ether products with good quality and high purity.

The invention belongs to the technical field of coal coking and production and separation of organic chemical products, and particularly relates to a method for producing m-ethyl anisole and p-ethyl anisole from xylenol oil. According to the method for producing m-ethyl anisole and p-ethyl anisole from xylenol phenol oil, provided by the invention, a mixture containing 2, 3-dimethyl anisole / m-p-ethyl anisole / 3, 5-dimethyl anisole is obtained through etherification reaction and rectification treatment; and sequentially adding a sulfuric acid solution and isobutene to react, and carrying out rectification and other steps to prepare ethyl anisole and p-ethyl anisole. The raw material used in the method is the low-price xylenol phenol oil fraction, the production cost is low, the reaction conditions are mild, only etherates are generated in the reaction process, side reactions of alkylation and dealkylation on benzene rings are basically avoided, and pure products of m-ethyl anisole and p-ethyl anisole are obtained through reaction with isobutene, rectification, tert-butyl removal and rectification.

The invention belongs to the field of organic synthesis, and particularly relates to a catalyst, a preparation method thereof and application of the catalyst in preparation of 2, 6-xylenol. The molar ratio of the iron element to the vanadium element to the platinum element in the catalyst is 100: (2-15): (0.05-0.5), and the preparation method of the catalyst is convenient and beneficial to industrial production. The catalyst provided by the invention has the characteristics of high conversion rate, high 2, 6-xylenol selectivity and high stability in a reaction for preparing 2, 6-xylenol and co-producing o-cresol through phenol methylation, the phenol conversion rate can reach 95% or above, and the 2, 6-xylenol selectivity can reach 90% or above.

The invention discloses a method for preparing 2-isopropyl-4, 5-dimethylphenol, which mainly comprises the following steps: S1, weighing a mixture of 3, 4-and 3, 5-dimethylphenol, a catalyst and an alkylated compound in parts by mass, adding the dimethylphenol mixture and the catalyst into a reactor, starting stirring, heating to a first temperature in an oil bath, introducing the alkylated compound for reaction, and cooling to a second temperature in the oil bath; ventilating for a period of time; s2, after introducing the alkylated compound, heating to a second temperature, carrying out heat preservation reaction, sampling and analyzing, and if the 2, 6-isopropyl-4, 5-xylenol is less than or equal to 1.0%, continuing to add the alkylated compound until the 2, 6-isopropyl-4, 5-xylenol is qualified, if the 2, 6-isopropyl-4, 5-xylenol is not qualified; and S3, separating the catalyst from the reaction product generated in the previous step, adding the reaction product into a rectifying still, rectifying to obtain an alkylated compound at normal pressure, then rectifying under reduced pressure to distill out the front component for mechanical application, continuously rectifying under reduced pressure to obtain 3, 5-xylenol and 2-isopropyl-4, 5-dimethylphenol fractions in sequence, and obtaining the residues of diisopropyl by-products, namely 2, 6-diisopropyl-4, 5-xylenol and 3, 5-dimethylphenol in the still, namely the diisopropyl by-products, namely 2, 6-diisopropyl-4, 5-xylenol and 2, 6-diisopropyl-4, 5-dimethylphenol. The method comprises the following steps: adding 2, 6-diisopropyl 4, 5-xylenol mixed fractions into a solvent;

Provided are antimicrobial compositions containing a potentiated halogen substituted xylenol, especially para-chloro-meta-xylenol (PMCX). In particular, a quaternary ammonium compound was found to dramatically improve the efficacy of the halogen containing xylenol against various microorganisms.

This invention discloses a flotation separation method for collecting galena and inhibiting sphalerite and pyrite, achieving efficient separation of galena from sphalerite and pyrite in a low-alkaline pulp environment, belonging to the field of mineral beneficiation technology. This invention uses N-hydroxyethylethylenediaminetriacetic acid as an inhibitor of sphalerite and pyrite at a low alkalinity of pH 7.5-9.5, and one or two of sodium diethyldithiocarbamate, sodium ethyl xanthate, and xylenol dithiophosphate as collectors for galena. Under low dosage conditions, it achieves simultaneous inhibition of sphalerite and pyrite and effective collection of galena, offering advantages of high efficiency, simple process, economy, and environmental friendliness. It is particularly suitable for silver-bearing, high-sulfur, low-grade lead-zinc ores and has broad application prospects.

The invention relates to the technical field of chromatographic detection, in particular to a detection method of parachlorometaxylenol. The detection method of parachlorometaxylenol comprises the following steps: (1) preparing a sample solution: dissolving a sample to be detected in chromatographic-grade acetonitrile, and filtering by using a microfiltration membrane to obtain the sample solution; and (2) analyzing the sample solution obtained in the step (1) by using high performance liquid chromatography. Through improvement of a specific solvent and chromatographic conditions, accurate and efficient determination of parachlorometaxylenol in a reaction product is realized.

This invention belongs to the technical field of organic synthesis and separation, specifically relating to a method for synthesizing phenolic resin from 2,4-xylenol / 2,5-xylenol. The method provided by this invention utilizes the difference in reactivity between 2,5-xylenol, 2,4-xylenol, and aldehydes, using a portion of the inexpensive 2,4 / 2,5-xylenol to replace phenol in the production of phenolic resin. Simultaneously, it produces 99% 2,4-xylenol and p-cresol, etc. Since the prices of 2,4-xylenol and p-cresol are significantly higher than those of 2,4 / 2,5-xylenol, this method also offers good economic benefits and expands the application scope and market size of 2,4 / 2,5-xylenol.

The present invention provides a method for preparing an iron-manganese bimetallic single-atom-loaded nitrogen-doped carbon sphere catalyst, using dopamine hydrochloride and trihydroxymethylaminomethane, first hydrothermally synthesizing a specific morphology polydopamine carbon sphere by controlling process parameters, and adding a predetermined amount of anhydrous manganese sulfate and iron nitrate nine hydrates to introduce the iron-manganese bimetal, and then synthesizing a diatomic nitrogen-doped carbon sphere catalyst by calcination. The method controls the process parameters by a hydrothermal method to obtain a specific morphology polydopamine carbon sphere, and then combines it with a calcination method, while successfully connecting single-atom iron and single-atom manganese to the surface of carbon nitride, the specific morphology of the sphere is maintained, and a highly efficient and durable diatomic catalyst is successfully provided. And due to the successful introduction of single-atom iron and single-atom manganese, potassium persulfate composite salt (Oxone) can be efficiently activated to degrade chloro-meta-xylenol, and the product of the present invention can completely degrade a chloro-meta-xylenol solution with a concentration of 10 mg / L within 1 minute.

The invention belongs to the technical field of synthesis and separation of coalification products, and particularly relates to a method for separating phenol monomers from industrial xylenol. The method for separating the phenol monomer from the industrial xylenol comprises the following steps: mixing the industrial xylenol, 6-(1-methyl-pentadecyl)-2, 4-xylenol, hexadecene and sulfuric acid for a first reaction, after the reaction is finished, adjusting the pH value of a reaction solution to 7-8, washing with water, removing a water layer, and carrying out rectification treatment on a material layer. The method for separating the phenol monomer from the industrial xylenol has the beneficial effects that the hexadecene can react with the 2, 4-xylenol in the industrial xylenol under a certain condition to generate an antioxidant 6-(1-methyl-pentadecyl)-2, 4-xylenol, and the 2, 5-xylenol does not react with the hexadecene, so that the antioxidant 6-(1-methyl-pentadecyl)-2, 4-xylenol does not react with the hexadecene; the method comprises the following steps of: separating 2, 4, 5-xylenol and 1-methyl-pentadecyl-methyl-2, 4-xylenol, and rectifying and separating to obtain pure 6-(1-methyl-pentadecyl)-2, 4-xylenol and 99% 2, 5-xylenol, so that the separation of 2, 4 / 2, 5-xylenol is realized, and an efficient polymerization inhibitor 6-(1-methyl-pentadecyl)-2, 4-xylenol is produced as a byproduct.

The invention provides a method for synthesizing anisole products by using cresol fractions, which comprises the following steps: taking cheap cresol fractions as raw materials, and carrying out etherification reaction on the cresol fractions and an alkylating agent under the action of a basic catalyst to obtain a mixture of various methyl anisole and dimethyl anisole which are insoluble in water; and then various anisole products are obtained through a series of treatment means such as rectification treatment, tert-butylation separation and isobutene removal. According to the method, cresol with low price is adopted to replace pure phenol such as refined o-cresol, pure 2, 6-xylenol, m-cresol, p-cresol, 2, 4-xylenol, 2, 5-xylenol and the like to produce corresponding alkyl etherates, so that the economic benefit is very considerable; and the method is simple and easy to implement, the operability of the process is good, the usability is high, and the method is convenient to popularize and apply in industrial production.