33 results about "Xylenol" patented technology

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.

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 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 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 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.

The invention belongs to the technical field of catalysts, and particularly discloses a method for preparing cresol through hydrocatalysis of xylenol and phenol by a nickel-modified USY molecular sieve. Under the hydrogen catalysis process conditions, the hydrogen pressure is 0.1-3 MPa, the reaction temperature is 350-450 DEG C, the space velocity is 1-5 h <-1 > (volume), in the optimal embodiment, the xylenol conversion rate is 89.56%, and the cresol (ortho-position, meta-position and para-position mixed cresol) selectivity is 92.16%. The production process and the catalyst are simple to prepare, the cost is low, the xylenol conversion rate is high, the cresol selectivity is high, the one-way service life of the catalyst is longer than 6 months, the catalyst can be continuously used after regeneration, and the reaction activity is not greatly reduced.

Applicants have developed novel methods and compositions for treating, preventing or ameliorating the effects plant phytopathogen infestation in plants, including of Candidatus Liberibacter spp. the causal agents of citrus greening and potato zebrachip disease. Novel compositions include one or more active agents of aminocaproic acid, carbinoxamine maleate, chloroxylenol, chlorpropamide, cinoxacin, duartin, and cyclopentolate hydrochloride as well as their derivatives, or salt / acid forms thereof. Methods of preventing disease development and infestation by plant pathogens are disclosed as well as methods of making, using and producing such compositions.

The present invention discloses an i-line photoresist, its preparation method, and application. The i-line photoresist composition disclosed in the present invention comprises the following components: a resin, a photosensitizer, an organosilicon leveling agent, and an organic solvent. The resin comprises the following components in parts by weight: 80-90 parts of a phenolic resin, 20-50 parts of a resin C, and 10-15 parts of a resin D. The phenolic resin is at least one of a phenolic resin A and a phenolic resin B. The preparation method of the phenolic resin A comprises the following steps: reacting m-cresol, p-cresol, 3,5-xylenol, and formaldehyde in the presence of oxalic acid to obtain the obtained product; the preparation method of the phenolic resin B comprises the following steps: reacting m-cresol, p-cresol, and formaldehyde in the presence of oxalic acid to obtain the obtained product; and the organosilicon leveling agent is polymethylphenylsiloxane. The i-line photoresist composition disclosed herein, when used for i-line photolithography, produces a photoresist pattern with high photosensitivity and resolution.

The invention provides a method for separating m-ethylphenol and p-ethylphenol extracted from tar and producing 2, 6-xylenol as a byproduct, which comprises the following steps: carrying out methylation reaction on a m-ethylphenol and p-ethylphenol mixture, an alcohol substance and water in a hydrogen atmosphere under the action of a first catalyst and a second catalyst to obtain at least one of a first product, a second product and a third product, the third product comprises 3-ethyl-2, 6-xylenol and 4-ethyl-2, 6-xylenol, and the third product comprises 3-ethyl-2, 6-xylenol and 4-ethyl-2, 6-xylenol; the third product is subjected to a first ethyl removal reaction under the action of a third catalyst and a fourth catalyst, and 2, 6-xylenol is obtained. According to the method for extracting m-ethyl phenol and p-ethyl phenol from tar, separating m-ethyl phenol and p-ethyl phenol and producing 2, 6-xylenol as a byproduct, methylation reaction is carried out on m-ethyl phenol and p-ethyl phenol mixture raw materials, methyl alcohol and the like, methylation reactants are purified to obtain a mixture of 3-ethyl-2, 6-xylenol / 4-ethyl-2, 6-xylenol, and 99.5% of 2, 6-xylenol can be obtained through catalytic ethyl removal and purification.

The present invention discloses an i-line photoresist and its preparation method and application. The i-line photoresist composition disclosed in the present invention comprises the following components: resin, photosensitizer, organosilicon leveling agent and organic solvent; the resin comprises the following components in parts by weight: 80-90 parts of phenolic resin, 20-50 parts of resin C and 10-15 parts of resin D; the phenolic resin is at least one of phenolic resin A and phenolic resin B; the preparation method of the phenolic resin A comprises the following steps: reacting m-cresol, p-cresol, 3,5-xylenol and formaldehyde under the action of oxalic acid; the preparation method of the phenolic resin B comprises the following steps: reacting m-cresol, p-cresol and formaldehyde under the action of oxalic acid; the organosilicon leveling agent is polymethylphenylsiloxane. When the i-line photoresist composition of the present invention is used for i-line lithography, the obtained photoresist pattern has high photosensitivity and resolution.

The invention belongs to the field of synthesis and separation of coalification products, and particularly relates to a method for separating various phenols from mixed cresol. According to the method, the mixed cresol is used as a raw material, ethyl in o-ethyl phenol in the m-cresol / o-ethyl phenol mixture is removed through the dealkylation catalyst to generate phenol and ethylene, and due to the fact that the ethyl removal reaction is carried out in the presence of the specific catalyst at a low temperature, few methyl in phenolic substances can be subjected to removal and transposition reactions; the method comprises the following steps: firstly, decomposing ethylene, then quantitatively reacting the ethylene obtained by decomposition with o-cresol in a 2, 6-xylenol crude product under the catalysis of a cresol aluminum catalyst to generate 2-ethyl-6-cresol, and rarely reacting with 2, 6-xylenol to generate 4-ethyl-2, 6-xylenol, thereby achieving the purpose of purifying 2, 6-xylenol. The lysate and the alkylation reaction liquid are respectively rectified to obtain high-quality phenol, m-p-cresol, 2, 6-xylenol and 2-ethyl-6-cresol, and the method is simple and easy to operate, few in three wastes and low in production cost.

The invention belongs to the technical field of fabric color fixing agents, and particularly relates to an acidic color fixing agent free of phenol and bisphenol substances as well as a preparation method and application of the acidic color fixing agent. The acidic color fixing agent is characterized by comprising the following components in parts by weight: 25-55 parts of water, 10-35 parts of tannic acid, 1-20 parts of cardanol sulfonic acid, 1-15 parts of aralkyl phenol, 1-5 parts of xylenol, 1-5 parts of formaldehyde, 1-10 parts of bio-based aldehyde, 1-10 parts of acrolein, 1-10 parts of concentrated sulfuric acid, 1-5 parts of acetic acid, 1-10 parts of sodium hydroxide and 1-5 parts of ammonia water. The invention also provides a preparation method of the acidic color fixing agent. The acid color fixing agent has the advantages of high fastness, no color change and small anion and cation conflict risk, can ensure that bisphenol A, B, S, F and AF and phenol are not used, and can meet the requirements of environmental regulations.

The invention belongs to the technical field of lubricating compositions, and particularly relates to an anti-wear composition, a preparation method and lubricating oil containing the anti-wear composition. The anti-wear composition is prepared from the following components in percentage by mass: sulfo-fatty acid ester, polyalkyl phosphate, polyether polyester, carboxylated graphene-molybdenum oxide composite nanoparticles, aziridine modified oleylamine, sulfo-xylenol formaldehyde resin, a metal alkoxide complex, a nonionic surfactant and solvent oil which is supplemented to 100%. According to the invention, multiple organic synergistic additives and inorganic nanoparticles are compounded to construct a stable lubricating film layer, and an anti-wear system with a uniform structure is realized through multi-stage dispersion, compounding and degassing treatment. The composition shows excellent wear resistance, thermal stability and corrosion inhibition capability under high-temperature and high-load friction conditions, the comprehensive performance of a lubricating oil product is superior to that of an existing formula, and the lubricating oil product has the characteristics of greenness, low carbon and environmental protection, and is suitable for industrial lubrication requirements under complex working conditions.

The present invention belongs to the field of chemical engineering technology, and particularly relates to a preparation method of o-cresol and 2,6-xylenol, which comprises the following steps: gasifying phenol, methanol, and water and mixing them with a carrier gas, passing through a reactor filled with a catalyst, and carrying out a gas-phase alkylation reaction; the carrier gas is water gas and / or reaction tail gas; the catalyst comprises Fe2O3, Cr2O3, SiO2, and ZrO2 with a molar ratio of (200-500):(1-10):(1-10):(5-50). The preparation method of o-cresol and 2,6-xylenol provided by the present invention has the catalyst with a competitive adsorption effect on carbon dioxide, carbon monoxide, and hydrogen, reducing the number of highly active catalyst centers, increasing the reaction selectivity, having low unit consumption of methanol and phenol, and simultaneously greatly improving the service life of the catalyst.

The invention belongs to the field of synthesis and separation of coalification products, and particularly relates to a method for obtaining dephenolized carbolic oil and phenolic substances by utilizing xylenol carbolic oil fraction separation. According to the method disclosed by the invention, phenolic substances in the cheap 2, 4-xylenol / 2, 5-xylenol phenol oil fraction raw material and methanol are subjected to fixed bed catalytic methylation reaction, and the methylated reaction liquid is rectified to obtain 2, 4-xylenol / 2, 5-xylenol dephenolized phenol oil, 2, 4, 6-xylenol and 2, 3, 6-tricresol, so that the application field of the 2, 4-xylenol / 2, 5-xylenol phenol oil fraction is expanded, and the method is suitable for industrial production. The treatment difficulty of the phenol-containing coal tar is reduced, and the separation of the 2, 4-xylenol / 2, 5-xylenol carbolic oil fraction is realized.