223 results about "Xylenol" patented technology

The invention relates to a continuous refinement separation device and method of coked crude phenol. The continuous refinement separation device comprises a static mixer 1, a first stage pretreatment acid-adding unit composed of a first stage mixing slot 2 and a wipe film evaporator 3, a second stage pretreatment oxidation unit composed of a second stage mixing slot 4 and a buffer tank, a phenol residue removing tower 6 and a rectification tower system composed of a dewatering tower 7, a phenol refinement tower 8, a orthocresol refinement tower 9 and a m,p-cresol refinement tower 10, wherein the first stage pretreatment acid-adding unit is connected with the phenol residue removing tower, the phenol residue removing tower is connected with the second stage pretreatment oxidation unit, andthen all devices of the refinement tower system are connected together in turn. The device and method of the invention can effectively performs processes of decoloring, deodorizing, desulfurizing, removing impurity and the like to the coked crude phenol raw material through reasonable design to obtain more than 99.5wt% of high purity phenol, more than 99.0wt% of high purity orthocresol, more than99.0wt% of high purity m,p-cresol and xylenol product. The whole process is reasonable, has high degree of automation and is characterized by low process energy consumption, high product quality, good stability and the like, thus the method of the invention is an effective and feasible coked crude phenol continuous refinement separation technology.

A process for preparing 3.5-xylenol features that the isophorone, liquid catalyst, and solid catalyst take part in reaction in inertial gas, and conventional collecting 3,5-xylenol.

[Problem] To provide a perhydropolysilazane making it possible to form a siliceous film with minimal defects, and a curing composition comprising the perhydropolysilazane.

[Means for Solution] The present invention provides a perhydropolysilazane having a weight-average molecular weight of 5,000 to 17,000, characterized in that when ¹H-NMR of a 17% by weight solution of said perhydropolysilazane dissolved in xylol is measured, the ratio of the amount of SiH_1,2 based on the aromatic ring hydrogen content of the xylol is 0.235 or less and the ratio of the amount of NH based on the aromatic ring hydrogen content of the xylol is 0.055 or less, and a curing composition comprising the perhydropolysilazane. The present invention also provides a method for forming a siliceous film, comprising coating the curing composition on a substrate and heating.

The invention provides a method for preparing lidocaine hydrochloride, and belongs to the technical field of anesthetic synthesis. The method comprises the following steps: by taking 2,6-xylenol as a raw material, Pd/C as a main catalyst and 2,6-dimethylcyclohexanone as a promoter, performing liquid phase amination with ammonia water at high temperature, thereby obtaining a midbody 2,6-dimethylaniline; enabling sodium methylate, 2,6-dimethylaniline and N,N-lignocaine methyl acetate as raw materials to react at 90-95 DEGC, distilling while reaction is performed to remove methanol till no methanol can be evaporated out, continuously reacting for 30 minutes, cooling to the room temperature, adding dichloroethane, washing with water, and leaving to stand to layer, thereby obtaining an organic layer, namely, a lidocaine based dichloroethane solution; further adding hydrochloric acid into the lidocaine based dichloroethane solution, adjusting the pH value to be 3.5-4 by using hydrogen chloride, adding activated carbon to reflux for 20-40 minutes, filtering, concentrating the filtrate, cooling, crystallizing, and dying, thereby obtaining lidocaine hydrochloride. The lidocaine hydrochloride prepared by using the method is simple in synthesis process and high in product purity, that is, the purity can be greater than 99%, and the total yield is greater than 84%.

The present invention provides a process for the production of cresol. The raw materials comprising ethers, phenols and carbinol are preheated, and then continue through the multi-stage solid catalyst bed mixed with steam, carrying out a gas-phase reaction to product cresol at 250-450℃ reaction temperature, with 0.3-5h-1 feed weight airspeed, and under ordinary pressure. The solid catalyst is selected one or more from alumina, kaolin and molecular sieve catalyst. The phenols are selected from phenol, xylenol and mixture thereof. The ethers are selected from anisole, dimethyl ether, methylanisole, and their mixture of any two or more. When the once-through yield of cresol is 0.2g cresol/g catalyst, the para-selective of p-cresol could reach 45%. The catalyst has been characterized by excellent stability, and non-corrosiveness for equipment in productive process, which is a kind of environment-friendly catalyst with predictable industrial application prospect.

A negative photosensitive resin composition including an alkali-soluble resin (A), a photoacid generator (B), a basic compound (C), a cross-linking agent (D), and a solvent (E) is provided. The alkali-soluble resin (A) includes an acrylate resin (A-1) and a novolac resin (A-2). The acrylate resin (A-1) is synthesized by polymerizing a monomer for polymerization, wherein the monomer for polymerization includes an unsaturated carboxylic acid or unsaturated carboxylic acid anhydride monomer (a-1-1) and a monomer (a-1-2). The monomer (a-1-2) includes a compound (a-1-2-1) with a tricyclodecane or dicyclopentadiene structure, a compound (a-1-2-2) represented by formula (1), or a combination of both. The novolac resin (A-2) is synthesized by polymerizing an aldehyde compound with an aromatic hydroxy compound, wherein the aromatic hydroxy compound includes a xylenol compound.

The present invention relates to coal chemical technology, and is especially process of producing phenol products. By using crude phenol after dewaterig and eliminating slag as material and through once intermittent rectifying process in a rectifying tower with theoretical plate number of 60-90, phenol, o-cresol fraction, m, p-cresol and industrial xylenol are obtained, with the o-cresol fraction is intermittently decompression rectified to obtain o-cresol product. Compared with tower type process, the present invention has low cost, small area and low power consumption.

The invention relates to a method for preparing resorcinol bis(2,6-dimethyl ployphosphate ester). The method comprises the following steps: heating phosphorus oxychloride, catalyst, water absorbent and solvent to a temperature between 110 and 115 DEG C; dripping 2,6-xylenol into the mixture, wherein the molar ratio of the 2,6-xylenol to the phosphorus oxychloride is 2:(1-1.02) to react at a temperature between 145 and 150 DEG C to obtain a colorless intermediate product; continuously dripping resorcinol into the intermediate product at a temperature between 140 and 145 DEG C, wherein the dosage is 0.48 to 0.5 time that of the molar dosage of the phosphorus oxychloride; reacting at a temperature between 150 and 155 DEG C; cooling the reactant to 100 DEG C to obtain a crude product; and carrying out acid-washing, alkaline-washing, water-washing, evaporating and drying for the crude product to obtain the product. The obtained product has a content of the monomer over 99.0 percent by weight, a melting point between 94.5 and 96.5 DEG C, an acid value less than 0.3mg KOH/g, and good quality.

The present invention relates to a composition, which is useful for producing coatings for metal sheet substrates of metal cans for storing and/or transporting food or beverages or a lid thereof, and which comprises the following components:

• (a) 30 to 90 wt. % of a polyvinylchloride-(PVC)-polymer,
• (b) 7 to 25 wt. % of an acrylic resin,
• (c) 3 to 40 wt. % of a crosslinking agent, which is produced from phenol, para-tert.-butylphenol, xylenol or a mixture thereof, and formaldehyde,
• (d) 0 to 8 wt. % additive,
• (e) 0 to 50 wt. % pigment and
• (f) a solvent-component,

where all weight percentages are on the basis of the total dry weight of the coating composition (without solvents) and the composition is substantially free of bisphenol-A-diglycidyl-ether (“BADGE”) and also substantially free of bisphenol-A-resins. The composition provides metal can coatings that have suitable flexibility, scratch resistance, adherence and sterilization resistance when processed in contact with food. The coatings are suitable for three-piece cans as well as deep-drawn metal cans. In particular they are, however, useful for lids that are to be torn open due to their extraordinary flexibility and sterilization resistance.

The invention discloses a continuous rectification separation device and a continuous rectification separation method for coal gasification crude phenol. The device comprises a first-level pretreatment acidifying unit consisting of a film scraping evaporator, a primary acid regulating tank group and a buffer tank, a second-level pretreatment oxidizing unit consisting of a static mixer and a secondary acid regulating tank and a rectifying tower system consisting of a deslagging tower, a dehydrating tower, a phenol refining tower, an o-cresol refining tower and a m, p-cresol refining tower, wherein the first-level pretreatment acidifying unit is connected with the phenol deslagging tower; and the phenol deslagging tower is connected with the second-level pretreatment oxidizing unit and is connected with each rectifying tower system respectively. By the device and the method, the raw material of the coal gasification crude phenol is subjected to decoloration, deodorization, desulfuration, impurity removal and the like effectively, so that products of high-purity phenol with the purity of more than 99.5 weight percent, high-purity o-cresol with the purity of more than 96.0 weight percent, high-purity m, p-cresol with the purity of more than 99.0 weight percent, mixed xylenol and phenol residual oil can be obtained. The method has the characteristics of reasonable process, high automaticity, low process energy consumption, high quality of products, high stability and the like, and is an efficient and feasible continuous rectification separation process for the coal gasification crude phenol.

The invention relates to epoxy resin, and in particular relates to fluorine-containing epoxy resin and a preparation method thereof. The method comprises the following steps of: performing a condensation reaction on a substituted alpha, alpha, alpha-trifluoro-multifluoro-substituted phenyl ethyl ketone and 2-methylphenol (or 2,6-xylenol) under the catalysis of a lewis acid, thereby preparing a fluorine-containing diphenol compound; and then performing a reaction on the fluorine-containing diphenol compound and epoxy chloropropane under the catalysis of an alkali, thereby obtaining the fluorine-containing epoxy resin having the structure in the following formula. The fluorine-containing epoxy resin is cured by using a commonly-used epoxy resin curing agent, so that the cured fluorine-containing epoxy resin has the advantages of high vitrifaction transformation temperature, excellent electrical property, low water absorption rate, strong hydrophobicity and the like. Thus, the fluorine-containing epoxy resin can be possibly applied to the fields of microelectronic packaging and surface coating.

The invention relates to the high molecular material field, and more specifically relates to a preparation method of polyphenyl ether. The preparation method of the polyphenyl ether comprises the following steps of adding cuprous chloride, pyridine and 2,6-xylenol to a reactor, and then adding the mixed solvent of 1,4-dioxane and water, and stirring for dissolving; slowly and dropwise adding hydrogen peroxide to the reactor at the room temperature, controlling the dropping time within 1-2h, and further stirring for reacting for 3-5h after finishing dropping; after the reaction is ended, pouring the solution into a methanol solution containing 5% of hydrochloric acid, carrying out suction filtration and collecting precipitate, washing for 3-5 times by using the hydrochloric acid-containing methanol solution, and drying in vacuum to obtain white polyphenyl ether powder. The mixed solvent employed by the preparation method provided by the invention is very effective for controlling the molecular weight of the polyphenyl ether; as the water content is increased and the dissolubility of the polyphenyl ether with high molecular weight is reduced, the polyphenyl ether precipitates as long as a certain molecular weight is achieved to terminate the reaction; the water content can be taken as the effective way to control the molecular weight; the ratio of the mixed solvent can be adjusted according to the desired molecular weight.

The invention discloses a method for synthesizing high-purity 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone through Cu-BTC catalysis. According to the method, trimesic acid and copper nitrate hydrateare hydrothermally synthesized into a Cu-BTC catalyst; under the alkaline emulsion reaction condition, hydrogen peroxide is utilized as an oxidizing agent, and 2,6-xylenol is oxidized and coupled intothe high-purity 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone; product quality yield of the high-purity 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone is 90 to 95%, and a product purity mass percent of the high-purity 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone is 98%; reaction temperature is 70 to 85 DEG C, and reaction time is 4 to 8h; the catalyst is easy to separate and recycle; after beingrepeatedly used for four times, quality yield of the 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone still reaches 87.5%, and purity of the 3,3',5,5'-tetramethyl-4,4'-biphenyl diquinone is 97.8%; alkaliemulsified filtrate and washing liquor can be recycled and deployed to be used repeatedly; a reaction condition is moderate, and a synthesizing technology has the advantages of greenness and environmental friendliness.

A negative photosensitive resin composition including a novolac resin (A), a photoacid generator (B), a basic compound (C), a cross-linking agent (D), and a solvent (E) is provided. The novolac resin (A) includes a hydroxy-type novolac resin (A-1) and a xylenol-type novolac resin (A-2). The hydroxy-type novolac resin (A-1) is synthesized by polycondensing a hydroxybenzaldehyde compound and an aromatic hydroxy compound. The xylenol-type novolac resin (A-2) is synthesized by polycondensing an aldehyde compound and a xylenol compound.

The invention relates to a making method of non-expansion non-bittern organic fireproof block material, which comprises the following steps: dispensing the raw material according to weight percent with 20%-50% aluminum hydroxide, 10%-25% zinc borate, 20%-40% porcelain powder, 5%-10% alumina silicate fiber, 2%-8% iron oxide red, 13%-20% polyester resin, 1%-2% coumarone resin, 1%-2% xylenol resin, 3%-6% dibutylphthalate, 1%-5% functional agent, soaking the coumarone resin 1%-2% and the xylenol resin in the dibutylphthalate for 24 hours; adding the polyester resin and the functional agent to stir to be sticking resin; adding the aluminum hydroxide, the zinc borate, the porcelain powder, the alumina silicate fiber, the iron oxide red into stirrer to stir for 10-15 minutes to form premix stuffing; squeezing to form shaping through force out machine after blending and stirring the sticking resin and the premix stuffing to form mission of viscous soft. The invention overcomes the problem that current fire-proof block can be produced irritating gas and smog under effect of fire hazard, which avoids toxic hydrogen halide gas to injury human body and corrode device effectively.

The invention relates to a disinfectant and a preparation method thereof. The formula of the disinfectant is: p-chloro-m-xylenol, coconut oleic acid, potassium hydroxide, isopropanol, pine oil and deionized water, and its weight percentage is, 5.0 -7.0: 6.5-9.5: 3.7-5.4: 15.0-25.0: 3.0-6.0: margin. The preparation includes: (1) adding deionized water and potassium hydroxide, stirring, heating up to 90°C-100°C, and then adding coconut oleic acid to make potassium coconut oleate soap; (2) mixing p-chloro-m-xylenol with Mix isopropanol, heat up to dissolve, then add deionized water and the above-mentioned potassium coconut oleate soap, stir; cool to 30°C-35°C, add pine oil, stir, add deionized water and continue stirring, and the product is ready. The disinfectant solution of the invention can effectively kill 99.999% of intestinal pathogenic bacteria, pyogenic cocci and pathogenic yeasts; the preparation method is simple, the cost is low, and it is suitable for industrial production.

The invention discloses an antibacterial laundry detergent which is prepared from the following substances in percentage by weight: 28-32% of laurinol polyoxyethylene (3) ether sulfosuccinate, 7-12% of alcohol ether carboxylate, 6-10% of fatty alcohol polyoxyethylene ether sulfate, 0.1-0.3% of hydroxypropyl methyl cellulose, 2-4% of fatty alcohol polyoxyethylene ether, 1.2-2.3% of parachlormetaxylenol, 0.1-0.3% of GXL preservative, 3-7% of propylene glycol, 0.3-0.7% of protease, 0.2-0.4% of brilliant blue, 0.1-0.7% of essence and 30.3-52% of pure water, wherein the concentration of the brilliant blue is 0.0008-0.002g/g. The formula of the antibacterial laundry detergent disclosed by the invention has the functions of impurity adsorption, odor elimination, antisepsis and anti-inflammation and automatic cleaning, and in addition, the formula is simple and safe to use and can be applied to washing of underwear clothes. The invention further discloses a preparation process of the antibacterial laundry detergent.

The preparation method of 2,6-dimethylphenol is to pass the reaction material mixed with methanol and water at a liquid space velocity of 0.5-2.0h-1 through a The fixed-bed reactor of the ortho-methylation catalyst is used for gas-phase catalytic reaction at 280-400°C and 0-1.5Mpa pressure to prepare 2,6-dimethylphenol. The ortho-methylation catalyst is composed of iron oxide, indium oxide, silicon dioxide, oxide Chromium, calcium oxide, alkali metal oxides and graphite. The phenol conversion rate of synthesizing 2,6-xylenol in the invention reaches 99 percent, the ortho position selectivity reaches 97 percent, and the service life of the catalyst reaches more than 3000 hours.