89 results about "Isooctyl alcohol" patented technology

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The invention belongs to the field of hydrometallurgy, and particularly relates to an extraction organic phase for selectively extracting niobium in a niobium-containing sulfuric acid solution and an extraction method, the extraction organic phase comprises a component a, a component b and a hydrophobic solvent; wherein the component a is a compound with a structure # imgabs0 # as shown in a formula 1; the component b comprises at least one of TBP (tributyl phosphate), MIBK (methyl isobutyl ketone), sec-octanol or isooctanol; r1 is alkyl of C1-C2, and R2 is alkyl of C1-C2; r < 2 > is alkyl of C < 7 > to C < 11 >; a is HCO3 <-> or CO3 < 2->; n is the absolute value of the valence of A. Based on the combination of the component a and the component b, the extraction rate of niobium in the sulfuric acid solution and the extraction separation selectivity of niobium and other elements can be further improved based on the combination and synergy of the components.

The invention discloses an anti-collapse photoresist flushing fluid and a photoetching method for forming a photoresist pattern, the anti-collapse photoresist flushing fluid comprises a nonionic surfactant, an anionic surfactant, an organic alkali and a solvent, the nonionic surfactant is # imgabs0 #; and the anionic surfactant is isooctyl alcohol ether phosphate ester or isooctyl alcohol polyoxyethylene ether phosphate ester. According to the invention, the alkynediol nonionic surfactant has the effect of double tails with interconnected bipolar groups and has a synergistic effect with the anionic surfactant, so that the surface tension of the flushing fluid is reduced while the activity of the surfactant is improved, thereby reducing the internal stress of photoresist lines and preventing collapse; bis-OH in the alkynediol and incompletely developed free carboxylic acid in the photoresist are subjected to esterification reaction to generate a hydrophobic material surface layer, so that the line edge roughness and the image surface roughness are improved; organic alkali and functional groups on the surface of the photoresist are subjected to cross-linking reaction, so that the mechanical property is improved, and collapse is further prevented.

A gasoline modifier, a preparation method therefor and a use thereof, and a clean and environmentally friendly gasoline containing same. By volume, the gasoline modifier comprises 10-30 parts of No. 3 or No. 5 white oil, 5-50 parts of a gasoline detergent synergist and 40-85 parts of isooctyl alcohol; the gasoline detergent synergist comprises a stock liquid and a diluent liquid; the stock liquid is a liquid substance formed by mixing 2-ethylhexyl phosphate and etidronic acid in a weight ratio of 1.8-3:1 and heating to perform an esterification reaction; and / or the stock liquid comprises 2-ethylhexanol, phosphite ester, 2-ethylhexyl acetate, polyisobutylene succinic anhydride and ethylhexyl phosphate; the diluent liquid is formed by mixing formaldehyde having a content greater than 99% with oligomeric water clusters in a weight ratio of 1:4-3:7; and the weight percentage of the stock solution in the gasoline detergent synergist is 0.8%-1.3% white oil. The gasoline modifier is a pure petroleum product. When added to gasoline, it can change the physical properties of the gasoline, and achieve the effects of increasing efficiency, saving fuel, removing carbon and reducing emissions.

The invention discloses a preparation method of isooctanol polyoxyethylene ether, and belongs to the technical field of surfactant preparation, and the method comprises the following steps: mixing isooctanol and an oxidation catalyst, introducing nitrogen, heating, and removing low-boiling-point substances and water; after the low-boiling-point substances and the water are removed, continuing heating, adding ethylene oxide, and vacuumizing for secondary dehydration; after the secondary dehydration is completed, continuously heating, continuously introducing ethylene oxide again, keeping the pressure constant, and calculating the consumption of ethylene oxide; when the addition amount of ethylene oxide reaches a theoretical value, stopping feeding, cooling, aging until the pressure is constant, removing ethylene oxide gas in vacuum, filling nitrogen and discharging to obtain a reaction material; and preheating the reaction material, and then carrying out separation treatment to obtain the isooctyl alcohol polyoxyethylene ether. The prepared reaction product can be directly filtered and collected, byproducts in the product are few, the operation is simple, and the difficulty of later separation and purification is reduced.

The invention relates to the technical field of paint removers, and particularly discloses an environment-friendly water-based paint remover for tools as well as a preparation method and application of the environment-friendly water-based paint remover. The invention provides an environment-friendly water-based paint remover for tools. The environment-friendly water-based paint remover is specifically prepared from 280-320 parts of a main solvent, 40-54 parts of a solubilizer, 30-40 parts of a surfactant, 7-13 parts of a penetrating agent, 130-150 parts of monoethanolamine, 8-12 parts of sulfonic acid, 40-58 parts of caustic soda flakes, 1-5 parts of a thickening agent and 280-320 parts of water. The main solvent is formed by mixing benzyl alcohol and dipropylene glycol monomethyl ether according to the weight ratio of (0.1-1): (1-10); the preparation method of the penetrant comprises the following steps: reacting phthalic anhydride, ethylene glycol and hydroquinone to obtain modified polyester; and then mixing the modified polyester with isooctanol polyoxyethylene ether JFC-3 to obtain the modified polyester. The paint remover prepared by the invention has good paint removal efficiency, and can effectively improve the production efficiency of an automobile coating factory and reduce the comprehensive cost.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of octocrylene serving as a main component of a sun-screening agent. The invention provides a preparation method of octocrylene serving as a main component of a sun-screening agent, which comprises the following steps: dissolving benzophenone in a polar aprotic solvent, adding zinc powder, heating to 50-70 DEG C under an inert condition, and dropwise adding 2-bromo-2-ethyl cyanoacetate for reaction to obtain a solution containing an intermediate etocrylene; under an ice bath condition, acidifying the solution containing the intermediate etocrilene by using a protonic acid aqueous solution, adding isooctanol, and slowly heating to 15-30 DEG C for reaction; and after the reaction is finished, extracting, washing, drying, filtering and concentrating the reaction liquid to obtain the octocrylene. According to the preparation method, reaction steps are reduced, the preparation process is simple, the operation method is convenient and fast, high-purity octocrylene can be obtained without purifying an intermediate, and large-scale industrial production is facilitated.

The invention discloses a preparation method of isooctyl p-aminobenzoate. The preparation method comprises the following steps: carrying out esterification reaction on p-nitrobenzoic acid and isooctyl alcohol in the presence of a catalyst and a water-carrying agent to obtain an intermediate isooctyl p-nitrobenzoate; and performing catalytic hydrogenation on the intermediate isooctyl p-nitrobenzoate to obtain the target product isooctyl p-aminobenzoate. A rectifying column is arranged in a reaction device adopted by the esterification reaction. The rectifying column is arranged in the esterification reaction device, so that the water removal efficiency can be effectively improved, the reaction time can be greatly shortened, the product purity can be effectively improved, and the product quality can be improved; besides, the acidic ionic liquid is adopted as the esterification reaction catalyst, so that a better catalytic effect can be obtained, a higher reaction yield is obtained, the catalyst can be recycled and reused through liquid phase layering operation, the activity of the recycled catalyst is kept well, and the operation is simple.

The invention relates to a preparation device and method for isooctyl thioglycolate, and particularly to the technical field of chemical intermediate preparation. A synthesis tank and a stirring mechanism are provided, the stirring mechanism is placed in a synthesis space of the synthesis tank, raw materials for isooctyl thioglycolate to be synthesized are placed into the synthesis space of the synthesis tank according to a set molar ratio, a first driving member arranged outside the synthesis tank is connected to a portion of a first stirring member extending out of the synthesis space, and a free end of the first stirring member is connected to a second stirring member via a cross universal joint, a sliding member is slidably sleeved on the outer periphery of the first stirring member, and the sliding member is slidable along the first stirring member until it engages with the cross universal joint. The first driving member drives the first stirring member to rotate, thereby stirring different areas in the synthesis space and uniformly dispersing thioglycolic acid and isooctyl alcohol, thereby improving the manufacturing efficiency of isooctyl thioglycolate.

This invention discloses a method for preparing ethylhexylglycerol and its application, comprising the following steps: adding isooctanol and a base to a solvent, stirring and cooling to 0-5 degrees Celsius, then adding a dichloromethane solution of p-toluenesulfonyl chloride dropwise. After the addition is complete, the mixture is brought to room temperature and stirred for a period of time. A sample is taken for gas chromatography analysis until the isooctanol is completely consumed. Water is added to separate the layers, and the dichloromethane layer is collected. The dichloromethane layer is washed twice with water and dried to obtain a dichloromethane solution of isooctyl p-toluenesulfonate, which is then dried and reserved. Glycerol and boric acid are added to a reaction flask for dehydration reaction, and after the reaction is complete, a diglyceride borate intermediate is obtained. The prepared diglyceride borate intermediate is added dropwise to a dichloromethane solution of isooctyl p-toluenesulfonate to obtain isooctyl borate diglyceride ether. Then, the solvent is removed, and the mixture is hydrolyzed with water to obtain the target compound, ethylhexylglycerol. This invention, through the application of the diglyceride borate structure, reduces the generation of by-products, and the overall yield is higher compared with current traditional processes.

This invention discloses a single-component moisture-curing conductive and thermally conductive adhesive and its preparation process, comprising the following raw materials in parts by weight: 100 parts SMP adhesive; 15-30 parts flake silver powder; 500-900 parts spherical silver-coated copper powder; 0-400 parts dendritic silver-coated copper powder; 10-20 parts decamethyltetrasiloxane; 1-1.5 parts β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate isooctyl ester; 7.5-10 parts N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane; and 1-1.5 parts vinyltrimethoxysilane. This invention allows the adhesive to cure at room temperature / low temperature using moisture in the air, eliminating the need for temperatures above 120°C. This completely avoids thermal stress damage to heat-sensitive substrates such as plastics, flexible circuit boards, and PET / PI films, making it perfectly suited for low-temperature processing scenarios such as flexible electronics manufacturing, wearable devices, and flexible sensors.

The present invention discloses a collector for flotation desulfurization of calcium-process vanadium extraction tailings and a preparation method thereof, which includes 1-10 parts of octyldecanol polyoxyethylene ether phosphate; 1-10 parts of fatty alcohol polyoxyethylene ether phosphate; 1-10 parts of isomeric tridecanol polyoxyethylene ether; 1-10 parts of alkylphenol polyoxyethylene ether; 1-10 parts of octyldecanol polyoxyethylene ether phosphate; 1-10 parts of isooctanol polyoxyethylene ether phosphate; 1-30 parts of N-cocoyl propanediamine acetate; 1-10 parts of lauroyl glutamate; 1-10 parts of lauroyl sarcosinate; 1-10 parts of cocoyl glycinate; 1-10 parts of coconut oil fatty acid alaninate. Compared with the prior art, the collector of the present invention has a high recovery rate of gypsum products obtained by flotation, low impurity content, high iron and vanadium content and low sulfur content in the iron concentrate remaining after flotation. It has high solubility, good foam fluidity, controllable foam life, environmental friendliness, strong collecting performance, fast flotation rate and shorter flotation time.

The invention discloses a modified binder for a metal ceramic composite material and a preparation method thereof, the modified binder is prepared by taking sodium silicate and potash water glass as a basic system, adding sodium methyl silicate as an anti-moisture absorption agent and isooctyl alcohol polyoxyethylene ether (JFC-5) as a surfactant, optimizing the raw material ratio and the preparation process, and preparing the modified binder for the metal ceramic composite material. The technical problems of moisture absorption pulverization, poor high-temperature stability, many forming defects and the like of a traditional single water glass binder are solved. The modified binder disclosed by the invention has good bonding strength, moisture resistance, high-temperature stability and process flowability, and can effectively improve the structural integrity and compactness of a ceramic preform, so that the mechanical property, wear resistance and interface bonding quality of a metal ceramic composite material are guaranteed; the metal ceramic composite material is especially suitable for metal ceramic composite parts with extremely high requirements on wear resistance and impact resistance, such as roller sleeves of coal mills, and has a wide industrial application prospect.

The invention discloses a preparation method of ethylhexyl palmitate, and relates to the technical field of ethylhexyl palmitate. According to the method, firstly, isooctanol is gasified and then introduced into a methyl palmitate solution, ethylhexyl palmitate is prepared through transesterification, gaseous feeding can improve the instantaneous concentration of alcohol in a liquid phase, the reaction is promoted to be carried out in the positive direction, the reaction rate is increased, meanwhile, methanol generated through the transesterification method can be gasified and taken out of a system, and the yield of ethylhexyl palmitate is increased. Forward proceeding of the reaction is further promoted, so that the reaction is more thorough; secondly, chromium salt is used as a metal source precursor and a 2-sulfo-4, 4 '-biphenyldicarboxylic acid ligand to synthesize a catalyst, a biphenyl group in the ligand provides rigid and hydrophobic large pore channels and provides a local high-concentration reaction environment, gaseous isooctanol can be easily diffused into the pore channels of the catalyst and is in contact with enriched methyl palmitate, and the reaction efficiency is improved; and sulfonic acid groups uniformly distributed in the ligand serve as solid superacid, strong acid sites are provided, and the production efficiency is improved.

The invention discloses a catalyst for preparing isocaprylic acid through oxidation of high wear-resistant and heat-resistant isooctanol and a preparation method of the catalyst, and the method comprises the following steps: (1) uniformly mixing a zinc source, a phosphorus source and a hydroxyapatite precursor, stirring to form gel, roasting, and grinding to obtain a ZnO / HAP active component; (2) uniformly mixing kaolin and pseudo-boehmite, carrying out ball milling and screening treatment, then continuously adding nano-graphite, and carrying out ball milling and mixing to obtain a composite matrix; (3) adding polyvinylpyrrolidone, polyacrylonitrile and glucose into deionized water, stirring and dissolving to obtain a composite binder solution; (4) mixing the ZnO / HAP active component with the composite matrix and the composite binder, adding a dispersant and deionized water, and carrying out stirring and ultrasonic dispersion treatment to obtain catalyst slurry; and (5) carrying out spray drying molding on the catalyst slurry, and then drying and roasting to obtain the high-wear-resistance and heat-resistance catalyst. The catalyst has high wear resistance and heat resistance, and is suitable for large-scale industrial production.

The application relates to the technical field of adhesion agents, and discloses a preparation method of an environment-friendly adhesion agent for aluminum alloy, which comprises the following steps: adding water, potassium hydroxide, sodium chloride, sodium gluconate, anhydrous tripotassium phosphate, polyether DF-20, 8-hydroxyquinolyl polycarboxylic acid adhesion agent, sulfosuccinate and sodium isooctyl alcohol sulfate into a reaction kettle and stirring uniformly to obtain the environment-friendly adhesion agent for aluminum alloy. The 8-hydroxyquinolyl group contained in the 8-hydroxyquinolyl polycarboxylic acid adhesion agent can interact with the surface of the aluminum alloy or the tinplate through coordination, and meanwhile, the carboxyl contained in the polycarboxylic acid adhesion agent can interact with the carboxyl and other groups in the water-based acrylic resin emulsion through hydrogen bonding, so that the polycarboxylic acid adhesion agent plays a bridging role between the aluminum alloy and the acrylic resin paint film, the adhesion and the bonding performance between the acrylic resin paint film and the base material are enhanced, and better adhesion grade and greater T-peeling strength are achieved.

This application discloses a method for extracting fluorine from a nickel-cobalt-manganese sulfate solution, relating to the field of wastewater treatment. The method comprises the following steps: mixing the nickel-cobalt-manganese sulfate solution with concentrated sulfuric acid for activation, subjecting the activated solution to multi-stage countercurrent extraction using an organic phase comprising tributyl phosphate, isooctyl alcohol, and a diluent, subjecting the fluorine-containing organic phase to multi-stage countercurrent washing, and subjecting the washed fluorine-containing organic phase to multi-stage countercurrent stripping. This application, directed to the extraction of fluorine from a nickel-cobalt-manganese sulfate solution, employs tributyl phosphate as an extractant, while isooctyl alcohol is added in a mixing and settling tank to improve phase separation. The process is simple, and the extraction rate is as high as over 90%.

The invention belongs to the technical field of cosmetic raw material medicines, and particularly relates to a preparation method of high-quality ethylhexyl palmitate. The method provided by the invention specifically comprises the following steps: by taking palmitoyl chloride and isooctanol as reaction raw materials, reacting at 20-50 DEG C under the action of an acid-binding agent, and after the reaction is finished, carrying out quenching, liquid separation, alkali washing, water washing and concentration to obtain a high-quality product ethylhexyl palmitate. The preparation method provided by the invention is not reported in literatures, the major breakthrough that the feeding amount of isooctanol in the molar ratio of raw materials is reduced and the product purification is simple is realized for the first time, and the quality purity of the product obtained by the method reaches the medicinal product standard that the quality purity reaches 99.6% or above, the single impurity content is 0.1% or below, and the heavy metal content is 10 ppm or below.

The invention discloses a diisooctyl / isononyl / isodecyl adipate plasticizer composition as well as a preparation method and application thereof, the diisooctyl / isononyl / isodecyl adipate plasticizer composition is prepared from adipic acid, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, and the molar ratio of the adipic acid to total alcohol is 1: (2-3); the molar ratio of the isooctyl alcohol (A) to the isononyl alcohol (B) to the isodecyl alcohol (C) is (0.01-2): (0.01-2): (0.01-2). The plasticizer composition disclosed by the invention can be used as a main plasticizer to be added into a PVC (Polyvinyl Chloride) material, and various asymmetric plasticizers coexist in the plasticizer composition, so that the integration of the plasticizers and PVC can be improved, the addition amount of the plasticizers in a PVC formula is increased, and the precipitation amount is extremely low. The plasticizer can be used as one of substitutes of traditional plasticizers, and even is a better improved product.

The invention relates to a down feather finishing agent for reducing down cluster and a preparation method thereof, and belongs to the technical field of down feather processing.The down feather finishing agent is prepared from, by weight, 5-8 parts of plant extract, 1-3 parts of polyoxyethylene lanonol, 2-4 parts of isooctanol ammonium sulfate and 40-50 parts of starch water, the plant extracting solution is obtained by mixed fermentation of soybean milk and moringa seeds, in the mixed fermentation system, the mass ratio of the soybean milk to the moringa seeds is (3-5): 1, and adopted zymophyte is lactobacillus casei. According to the down feather finishing agent provided by the invention, a liquid system consisting of polyoxyethylene lanonol, isooctanol ammonium sulfate salt and starch water is utilized to provide a suitable environment for a mixed fermentation product of soybean milk and moringa seeds to act on down feather fibers, so that the effects of reducing the clotting probability of down feather and improving the filling power and durability of the down feather are achieved.

The invention relates to a phosgene purification method and a method for preparing chloroformic acid-2-ethyl ethyl. According to the method, the MOF material with excellent performance is prepared, and the MOF material is adopted to purify the phosgene, so that trace chlorine in the phosgene can be effectively removed, it is ensured that the chlorine is hardly contained in the phosgene, and adverse effects on downstream preparation of chloroformic acid-2-ethylhexyl ester are avoided. The invention also provides a method for preparing chloroformic acid-2-ethylhexyl ester, which comprises the step of reacting phosgene with isooctanol, and the phosgene is purified by the phosgene purification method. The method provided by the invention can reduce side reactions during preparation of chloroformic acid-2-ethyl ethyl, improve product purity and ensure product chromaticity.

The application belongs to the technical field of fine chemical product preparation, and particularly relates to a preparation method of diisooctyl phosphite intermediate and application of the intermediate in preparation of P507. The preparation method of the diisooctyl phosphite intermediate comprises the following steps: adding phosphorus trichloride into isooctanol by liquid dropping, controlling dropping speed, dropping pressure and reaction temperature, obtaining a diisooctyl phosphite mixture, removing impurities from the diisooctyl phosphite mixture by gas-phase ammonia neutralization or high-vacuum HCl removal, distilling chloroisoctane, collecting chloroisoctane byproduct, and finally obtaining diisooctyl phosphite. The preparation method of the diisooctyl phosphite intermediate is simple in operation, mild in condition, good in environmental protection, high in purity and yield of the prepared intermediate, and the application of the diisooctyl phosphite intermediate in preparation of P507 is high in purity of the prepared P507.

The invention relates to the technical field of oil and gas development, in particular to a tackifying and scale inhibiting integrated oil field additive and a preparation method thereof. The embodiment of the invention provides a preparation method of a tackifying and scale inhibition integrated oil field auxiliary agent, which comprises the following steps: step 1, dissolving acrylamide, acrylic acid, a rigid monomer, 3-propyl-2-enoyloxypropane-1-sodium sulfonate and a modified phosphoric acid monomer in deionized water to obtain a mixed water phase; 2, uniformly mixing a co-emulsifier, an emulsifier and white oil to obtain a mixed oil phase; step 3, stirring and emulsifying the mixed water phase and the mixed oil phase to obtain an emulsifying system, and adding a reducing agent into the emulsifying system to carry out redox polymerization reaction to obtain a reaction product; and step 4, adding a diverting agent isooctyl alcohol polyoxyethylene ether into the reaction product to prepare the tackifying and scale inhibiting integrated oil field auxiliary agent. The continuous mixing fracturing construction operation can be realized, the operation time is saved, the working efficiency is improved, and the construction cost is saved.

The invention discloses a preparation method of a novel rapid penetrant, which is based on an esterification reaction of isooctyl alcohol, maleic anhydride and p-toluene sulfonic acid as raw materials and a sulfonation reaction of sodium pyrosulfite and a catalyst rapid penetrant T as raw materials. And high-selectivity continuous synthesis of the rapid penetrant T under mild conditions is realized by optimizing the process conditions of the reaction. By adopting the synergistic effect of sectional feeding and low temperature and low pressure, namely dynamic matching of sectional heating and pressure reduction of esterification reaction and sectional cooling and step-by-step feeding of sulfonation reaction, accurate matching of reaction conditions and reactant activity is realized, the safety and environmental influences generated during traditional high-temperature and high-pressure direct feeding are avoided, the production time is shortened, and the production efficiency is improved. The preparation method has the advantages of simple preparation process, low cost, energy saving, consumption reduction, safety, environmental protection, and facilitation of the realization of efficient and safe industrial production.

The invention discloses a cleaning agent for cleaning a nickel-plated battery shell and a preparation method of the cleaning agent, and belongs to the technical field of cleaning agents. The cleaning agent is prepared by compounding 30-80 parts by mass of a hydrocarbon solvent, 10-30 parts by mass of an alcohol ether solvent, 2-10 parts by mass of a surfactant, 1-5 parts by mass of a penetrant and 0.2-3 parts by mass of a self-made auxiliary agent. Wherein the self-made auxiliary agent is prepared from isooctyl alcohol, cyclohexanol, triethanolamine, dodecanedioic acid and dipropylene glycol butyl ether according to a specific proportion and a reaction process, and organic amine salt with surface activity and a corrosion inhibition function is generated in a system. The cleaning agent can synchronously and efficiently remove polar and non-polar pollutants on the surface of a nickel-plated battery shell through the synergistic effect of all the components, and can deeply penetrate into micropore gaps to complete precise cleaning by means of the ultralow surface tension of the fluorocarbon penetrant, meanwhile, a protective film is formed on the surface of a nickel-plated layer, and zero damage in the cleaning process is achieved. The product is good in stability, high in environmental protection property, simple and convenient in preparation method and suitable for industrial production.

The invention provides a preparation method of 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate, and belongs to the technical field of preparation of lubricating oil additives. The preparation method comprises the following steps: mixing methyl 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, isooctanol and a catalyst dialkyl dithiophosphate metal salt, replacing in an inert atmosphere, and heating to carry out transesterification, thereby obtaining the 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionate. The dialkyl dithiophosphate metal salt catalyst used in the invention does not need to be removed, the product can be directly applied to the field of lubricating oil, the problems that the catalyst is difficult to remove and post-treatment processes such as washing are complicated in the current 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate production process are effectively solved, environmental pollution factors are greatly reduced, and the production cost is reduced. Moreover, the product is high in yield, high in purity and good in quality, and the method is an energy-saving, environment-friendly, simple and economical production method.

The invention discloses a method for preparing DOTP from waste PET, and belongs to the technical field of polyester plastic high polymer material depolymerization. The invention solves the problems of high reaction temperature and difficulty in thoroughly separating the product from the system in the existing PET alcoholysis. According to the method, butanol is depolymerized under the micro-positive pressure condition to obtain a DBTP intermediate product, the DBTP intermediate product is centrifuged, filtered and distilled, then the DBTP intermediate product is subjected to isooctanol ester exchange under the negative pressure condition to obtain DOTP, the whole reaction process is carried out in a mild temperature environment, finally, efficient preparation of DOTP and a fine chemical ethylene glycol is achieved, the purity of the obtained DOTP after purification is larger than or equal to 99%, the acid value is smaller than or equal to 0.03, and the purity of the obtained DOTP is larger than or equal to 99%. The platinum-cobalt chromaticity is less than or equal to 20 and reaches the index of a DOTP national standard premium grade product.

The invention discloses a catalyst and its preparation and application. The catalyst comprises alumina and a copper-containing active component and a nickel-containing active component loaded on the surface of the alumina. The preparation method thereof is as follows: copper nitrate and nickel nitrate are mixed and dissolved in water to obtain a nitrate mixture solution; the nitrate mixture solution is loaded on the surface of the alumina carrier and roasted at a high temperature to obtain a second intermediate; the second intermediate is appropriately reduced to obtain a catalyst. The catalyst can be used in catalyzing the synthesis of high-carbon alcohols from ethanol and butanol. The invention has extremely high selectivity and conversion rate, and the single-pass conversion rate can basically reach more than 99%; the invention has high stability and activity, and can directly convert ethanol and butanol into high-carbon alcohols in a reactor, without the need for two-step reaction and external hydrogenation conditions, thereby reducing the complexity of the reaction; at the same time, the reaction products are mainly n-hexanol and isooctyl alcohol, thereby reducing the difficulty of subsequent product separation.

The application discloses a method for continuously synthesizing isooctyl chloroformate, which comprises the following steps: preparing a continuous reaction device which comprises a photochemical tower, a transfer kettle and a chase light tower which are communicated with each other, feeding isooctanol and phosgene into the photochemical tower to perform a reaction, overflowing the obtained esterification liquid to the transfer kettle, performing gas-liquid separation on the obtained tail gas outside the tower, and feeding the liquid light into the tower; controlling the temperature of the transfer kettle at 30-40 DEG C, feeding the esterification liquid into the chase light tower after the transfer kettle collects a certain amount of esterification liquid, controlling the temperature of the chase light tower at 40-80 DEG C, feeding nitrogen into the chase light tower to perform chase light, and collecting high-purity isooctyl chloroformate in the chase light tower, wherein the content of the isooctyl chloroformate is greater than or equal to 99%, and the yield is greater than or equal to 97%. The method realizes continuous production under the premise of ensuring the quality and yield of the product, has small production land occupation, small liquid holdup of the reaction system, small risk, high production efficiency, easily controlled process conditions, little waste, accords with the green and environmental protection production concept, and is suitable for industrial production.

The present invention discloses an anti-collapse photoresist rinse liquid and a photolithography method for forming a photoresist pattern, which comprises a non-ionic surfactant, an anionic surfactant, an organic base and a solvent. The non-ionic surfactant is:; The anionic surfactant is isooctyl ether phosphate or isooctyl polyoxyethylene ether phosphate. The present invention adopts an alkynediol-based non-ionic surfactant, which has the function of double tails with interconnected bipolar groups, and synergistically acts with the anionic surfactant to improve the activity of the surfactant while reducing the surface tension of the rinse liquid, thereby reducing the internal stress of the photoresist lines and preventing collapse; The double - OH in the alkynediol reacts with the unreacted free carboxylic acid in the photoresist during development to form a hydrophobic material surface layer, improving the line edge roughness and the image surface roughness; By cross-linking reaction between the organic base and the functional groups on the photoresist surface, the mechanical properties are improved to further prevent collapse.