42 results about "Isononyl alcohol" patented technology

The invention belongs to the field of petrochemical industry, and relates to a production method of isononyl alcohol and a production device of isononyl alcohol. The production method of the isononyl alcohol comprises the following steps: C8 olefin, synthesis gas and a catalyst enter a raw material reactor to react to obtain a hydroformylation reaction product, the hydroformylation reaction product enters a product separation unit to separate and remove by-products, and then the hydroformylation reaction product enters an aldehyde hydrogenation unit to react to obtain the isononyl alcohol. The invention has the following beneficial effects: the product separation unit removes most of non-condensable steam, light components and water through a low-vacuum flash evaporation-high-vacuum evaporation two-stage process, reduces the load of a high-vacuum system, and saves energy consumption; the circulation path of the catalyst is shortened through the efficient and rapid separation process of the catalyst, and decomposition of the catalyst is reduced; by applying the vacuum evaporator, low-pressure and low-temperature rapid separation of materials is achieved, the catalyst circulation process is short, the separation temperature is low, and meanwhile energy consumption is saved.

The invention provides a heat extraction distribution structure for an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the heat extraction distribution structure comprises an inner tube box and an outer tube box, the inner tube box is arranged in the outer tube box, a heat extraction medium inlet cavity is formed in the inner tube box, and a heat extraction medium outlet cavity is formed between the inner tube box and the outer tube box; the heat exchange pipes are U-shaped pipes, a heat removal medium inlet and a heat removal medium outlet are formed in the two ends of each heat exchange pipe correspondingly, and the heat removal medium inlets and the heat removal medium outlets communicate with the heat removal medium inlet cavity and the heat removal medium outlet cavity correspondingly; the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and each heat exchange tube penetrates through two positioning through holes; the problems that in the prior art, a gas-liquid up-flow type bubbling bed reactor is not internally provided with internal components, gas distribution and heat extraction cannot be achieved, and the conversion rate of reaction is low are solved.

The invention discloses tetraisononyl pyromellitate as well as a preparation method and application thereof. The tetraisononyl pyromellitate is obtained by carrying out esterification reaction on pyromellitic acid or pyromellitic anhydride and isononyl alcohol under the action of a catalyst. The raw materials used in the synthesis process of the tetraisononyl pyromellitic acid are safe, the cost is low, the synthesis procedures and steps are simple, and the synthesis method is suitable for industrial processing and production. The trioctyl trimellitate plasticizer can be used as one of substitutes of the trioctyl trimellitate TOTM plasticizer, and even is a better improved product.

The invention relates to a heterogeneous catalyst, a preparation method thereof and application of the heterogeneous catalyst in preparation of diisononyl cyclohexanedicarboxylate, and belongs to the technical field of organic synthesis. The heterogeneous catalyst takes polymer microspheres as a carrier and titanate as a modification group, and the polymer microspheres are obtained by mixing a macromolecular Raft reagent, a polymeric monomer, a chain transfer agent and a solvent and then adding an oxidation-reduction system consisting of an oxidizing agent and a reducing agent for dispersion polymerization reaction. The catalyst has the advantages of multiple active sites, high catalytic activity, easiness in ester separation from a product and the like. The heterogeneous catalyst can be used for obtaining the cyclohexanedicarboxylic acid diisononyl ester at a high temperature through one-step esterification. The preparation method comprises the following steps: adding hexahydrophthalic anhydride, isononyl alcohol and a heterogeneous catalyst into a reaction kettle at normal pressure to obtain the cyclohexanedicarboxylic acid diisononyl ester.

The invention discloses a 3, 5, 5-trimethyl-1-hexanal liquid phase hydrogenation catalyst as well as a preparation method and application thereof, and relates to the field of catalysts. The prepared catalyst takes ZnO / SiO2 as a carrier, the molar ratio of Zn / Si in the carrier is 1: (2-5), Cu and Ni are taken as active components, and the catalyst comprises the following components in percentage by mass: 70-80% of the carrier, 15-20% of the active component CuO and 5-10% of NiO. The preparation method comprises the following steps: uniformly mixing silica sol and zinc nitrate, adding the mixture into a reaction kettle with a stirring function, quickly adding alkali liquor, then mixing and adding a nitrate solution of the active component into the reaction kettle, after neutralization is finished, washing, filtering, drying, granulating, roasting, and finally flaking into a ring shape to obtain the catalyst. According to the prepared catalyst, the conversion rate of isononyl aldehyde reaches 99% or above, the selectivity of isononyl alcohol reaches 99% or above, and the catalyst has excellent activity, selectivity and stability and is beneficial to industrial application and popularization.

The invention discloses an isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition as well as a preparation method and application thereof, and the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition is prepared from pyromellitic acid or pyromellitic anhydride, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, the molar ratio of the pyromellitic acid or the pyromellitic anhydride to the total alcohol is 1: (4-5); the molar ratio of the isooctyl alcohol (A) to the isononyl alcohol (B) to the isodecyl alcohol (C) is (0-5): (0-5): (0-5). The raw materials used in the synthesis process of the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition are safe, the cost is low, the synthesis process is simple, and the isooctyl / isononyl / isodecyl pyromellitic acid plasticizer composition is suitable for industrial processing and production and has excellent heat resistance and low precipitation performance.

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 the technical field of organic alcohol synthesis, and discloses a method for synthesizing isononyl alcohol. The method comprises the following steps: (1) mixing octylene, a rhodium catalyst and a phosphine ligand, then introducing synthesis gas into the obtained mixture, and carrying out hydroformylation reaction to obtain isononanal; (2) in the presence of a hydrogenation catalyst, mixing the isononanal with hydrogen for hydrogenation reaction; wherein the phosphine ligand is selected from two or more of triphenyl phosphite, tris (2, 4-di-tert-butylphenyl) phenyl phosphite, triphenylphosphine, 6, 6 '-{[5, 5'-dimethoxy-3, 3 '-bis (2-methyl-2-propyl)-2, 2'-biphenyl diyl] bis (oxy)} bis [dibenzo (d, f) (1, 3, 2) dioxaphosphoheptane] and 4, 5-bis (diphenylphosphine)-9, 9-dimethyl xanthene. According to the method, the conversion rate of mixed octylene in the hydroformylation process and the selectivity and yield of isononyl aldehyde can be remarkably improved, so that the yield of isononyl alcohol is improved, reaction conditions are mild, and the method has remarkable economic value and wide industrial application prospects.

The invention provides a silicon hydrogenation catalyst as well as a preparation method and application thereof, and relates to the field of catalysts. The catalyst comprises, by mass, 15-30% of an active component and 70-85% of a catalyst carrier, and the catalyst carrier is SiO2 (at) molecular sieve microspheres having a core-shell structure; the preparation method comprises the following steps: preparing a catalyst carrier, performing alkali etching on silochrom, adding inorganic aluminum salt and an organic ammonium template agent, uniformly mixing, performing hydrothermal crystallization treatment in a reaction kettle, and performing post-treatment on a product to obtain the catalyst carrier; and impregnating the active component on the carrier to obtain the catalyst. The prepared catalyst is applied to a reaction for preparing isononyl alcohol through isononyl aldehyde hydrogenation, the conversion rate of isononyl aldehyde reaches 99% or above, the selectivity of isononyl alcohol reaches 99% or above, and the catalyst has excellent activity, selectivity and stability and is beneficial to industrial application and popularization.

The present invention belongs to the field of aldehyde hydrogenation catalyst preparation, and specifically relates to a catalyst for preparing isononanol by hydrogenation of isononanal, and its preparation method and application. The catalyst includes an active component, a carrier and an auxiliary agent, and the active component: the carrier: the auxiliary agent is 20%-40%: 50%-80%: 1%-10% by mass percentage. Silica sol, aluminum nitrate or aluminum sulfate or aluminum hydroxide, and an alkaline precipitant solution are added to a stirred reactor, and then the nitrate solution of the active component is mixed and added thereto, and then the reaction product is subjected to hydrothermal treatment, and finally washed, filtered, dried, added with auxiliary agents, granulated, roasted, and finally formed into sheets to obtain a catalyst. The isononanal hydrogenation catalyst prepared by the present invention has an isononanal conversion rate of more than 99%, and an isononanol selectivity of more than 98%. It has excellent activity, selectivity and stability, and is conducive to industrial application and promotion.

The invention relates to the technical field of organic synthesis catalysts, and discloses an isononanoic acid catalyst as well as a preparation method and application thereof. The isononanoic acid catalyst comprises a carrier and an active component loaded on the carrier, the carrier is nitrogen-doped activated carbon; the active components comprise a first active component Au and a second active component; and the second active component is selected from one or more than two of Fe, Co and Ni. The isononanoic acid catalyst is higher in catalytic activity, not prone to inactivation and lower in catalyst cost, and meanwhile the preparation method of the isononanoic acid catalyst is mild in reaction condition and environmentally friendly in process; the isononanoic acid is prepared from isononyl alcohol by adopting the isononanoic acid catalyst, the participation of hydrogen peroxide is not needed, the whole process is safe and efficient, the isononanoic acid catalyst is easy to separate from a product, the post-treatment method is simple, the prepared isononanoic acid is higher in purity, and meanwhile, the isononanoic acid catalyst has higher isononanoic acid selectivity and isononyl alcohol conversion rate.

The invention relates to the technical field of wastewater treatment, and particularly discloses a wastewater treatment composite membrane and a preparation method thereof. The preparation method of the wastewater treatment composite membrane provided by the invention sequentially comprises the following steps: preparing a base membrane: respectively dissolving piperazine, m-phenylenediamine and polyoxyethylene castor oil in water, adding an auxiliary agent and ammonia water, uniformly mixing at room temperature to obtain an aqueous phase solution, carrying out suction filtration on the aqueous phase solution to the surface of a polyacrylonitrile microfiltration membrane, and drying to obtain the base membrane; the auxiliary agent is formed by mixing isononyl alcohol, trisodium citrate dehydrate and propylene glycol alginate; preparing a composite membrane: under a dark condition, soaking the base membrane into an oil phase solution, taking out the base membrane, and washing the base membrane with water to obtain the wastewater treatment composite membrane; the oil phase solution comprises an oil phase monomer and an organic solvent; the organic solvent is formed by mixing saturated alkane and methylbenzene according to the weight ratio of (3-7): 1. The wastewater treatment composite membrane provided by the invention has good water flux and desalination rate and relatively excellent acid and alkali resistance.

The present invention provides an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the isononyl alcohol hydroformylation reactor comprises: a housing, the lower part of the housing is provided with a reactant inlet, and the side wall of the upper part of the housing is provided with a reactant outlet; the diffusion device is arranged in the shell and is positioned above the reactant inlet; the distribution device is arranged in the shell and is positioned above the diffusion device; the heat exchange distribution structure is arranged in the shell and located above the distribution device, the heat exchange distribution structure comprises a plurality of heat exchange pipes and at least one distribution plate, the axes of the heat exchange pipes are parallel to one another, the heat exchange pipes are annularly distributed along a plurality of concentric virtual circumferences, the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and the positioning through holes are communicated with the distribution structure. The plurality of heat exchange tubes are respectively arranged in the plurality of positioning through holes in a penetrating manner; the isononyl alcohol hydroformylation reactor solves the problems of non-uniform distribution of gas and liquid reactants, serious back-mixing phenomenon in the reaction process and low reaction conversion rate of the isononyl alcohol hydroformylation reactor in the prior art.

The present invention relates to a silicon wafer cutting fluid comprising a wetting agent, a dispersing agent, a lubricant and a solvent, wherein the wetting agent is an isononyl alcohol ethoxylate compound having an ethoxylation degree of 2 or 3. The present invention also relates to a method for preparing the silicon wafer cutting fluid, and a method for cutting a silicon wafer. The silicon wafer cutting fluid of the present invention can provide excellent wetting ability, especially excellent dynamic wetting ability, while ensuring low foaming, and can improve the yield of silicon wafers.

The invention relates to a skid-mounted diisononyl phthalate synthesis device and a synthesis method, and belongs to the technical field of organic chemical synthesis. According to the method, the mixture of the catalyst and the isononyl alcohol and the mixture of the phthalic anhydride and the isononyl alcohol are directly mixed for the esterification reaction, the esterification reaction efficiency is high, the technological operation is simpler, and diisononyl phthalate in the prepared finished product is high in purity, low in acid value and low in viscosity and can be used as a plasticizer to be applied to PVC products; the molar ratio of isononyl alcohol and phthalic anhydride adopted in the esterification reaction is small, the amount of isononyl alcohol which is not completely reacted is relatively reduced while the conversion rate of diisononyl phthalate is ensured, and the difficulty of isononyl alcohol separation and recovery in the subsequent process steps is reduced; the skid-mounted synthesis device is formed by integrally mounting all the equipment on the same base, and is convenient to mount, small in occupied area and convenient to move.

The invention provides a heat exchange distribution structure for an isononyl alcohol hydroformylation reactor, and relates to the technical field of isononyl alcohol hydroformylation reactors, the heat exchange distribution structure comprises: a plurality of heat exchange tubes, the axes of the plurality of heat exchange tubes are parallel to each other, and the plurality of heat exchange tubes are annularly distributed along a plurality of concentric virtual circumferences; the distribution plate is provided with a plurality of positioning through holes and a distribution structure, and the heat exchange tubes are arranged in the through holes in a penetrating mode respectively; the isononyl alcohol hydroformylation reactor solves the problems that gaseous reactants in the isononyl alcohol hydroformylation reactor in the prior art are not uniformly distributed, liquid reactants are easy to form vortexes to cause a backmixing phenomenon, the local concentration stability of the gaseous reactants at different axial positions is poor, and the reaction conversion rate is low.

The invention relates to a sintering-resistant ruthenium-based catalyst, which consists of the following components in percentage by weight: 0.1 to 6 percent of ruthenium serving as a main active component, 0.15 to 9 percent of a porous metal oxide carrier and the balance of an auxiliary agent, the auxiliary agent is any one or a mixture of more than two of magnesium, calcium and vanadium; the porous metal oxide carrier is any one or a mixture of more than two of cerium oxide, zirconium dioxide and titanium dioxide. Meanwhile, the invention also discloses a preparation method and application of the catalyst. The preparation process is simple and easy to implement, the obtained catalyst has good sintering resistance and reaction stability, the reaction activity is efficient, the target product selectivity is good, and the catalyst can be used for producing the multi-branched isononanoic acid through high-selectivity oxidation of the multi-branched isononyl alcohol.

The present application relates to a kind of sintering-resistant ruthenium-based catalyst, which is composed of main active component ruthenium, porous metal oxide carrier and adjuvant, and the weight percentage composition is as follows: 0.1% to 6% of metallic ruthenium, 0.15% to 9% of adjuvant, and the balance is porous metal oxide carrier;The adjuvant is any one or more than two kinds of mixture of magnesium, calcium and vanadium;The porous metal oxide carrier is any one or more than two kinds of mixture of cerium oxide, zirconium dioxide and titanium dioxide. At the same time, the preparation method and application of the catalyst are also disclosed. The preparation process of the present application is simple and easy to implement, the obtained catalyst has good sintering resistance and reaction stability, and the reaction activity is high, the selectivity of target product is good, and it can be used for the high-selectivity oxidation of multi-branched isononyl alcohol to produce multi-branched isononyl acid.

The invention discloses a diisooctyl azelate / isononyl azelate / isodecyl azelate plasticizer composition and a preparation method and application thereof, the diisooctyl azelate / isononyl azelate / isodecyl azelate plasticizer composition is prepared from azelate, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, and the molar ratio of azelate 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.

This invention discloses a system and method for preparing isononol. The method of this invention involves directly introducing the product into a hydrogenation reactor after the carbonyl synthesis reaction. Utilizing the hydrogenation function of the carbonyl synthesis catalyst (which has both catalytic carbonyl synthesis and catalytic hydrogenation functions), the process parameters of temperature and pressure are adjusted, and hydrogen gas is bubbled in to hydrogenate isononaldehyde to isononol. This avoids the problem of difficult separation of isononaldehyde (which is easily polymerized and oxidized at high temperatures) from the catalyst in traditional processes.

The invention discloses a diisooctyl / isononyl / isodecyl terephthalate plasticizer composition as well as a preparation method and application thereof, the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition is prepared from terephthalic acid, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, and the molar ratio of terephthalic 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 (0-3): (0-3): (0-3). The raw materials used in the synthesis process of the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition are safe, the synthesis process is simple, the cost is low, and the diisooctyl / isononyl / isodecyl terephthalate plasticizer composition is suitable for industrial processing production, high in heat resistance and not prone to precipitation.

The present application relates to a kind of heterogeneous catalyst and its preparation method and application in the preparation of cyclohexane dicarboxylic acid diisononyl ester, belong to the technical field of organic synthesis.The heterogeneous catalyst is with polymer microspheres as carrier, titanate as modification group, the polymer microspheres are by macromolecular Raft reagent, polymerization monomer, chain transfer agent and solvent are mixed, then the dispersion polymerization reaction of the oxidation-reduction system composed of oxidizing agent and reducing agent is obtained.The catalyst has multiple active sites, high catalytic activity, easy with product ester separation and other advantages.The heterogeneous catalyst can be esterified under high temperature to obtain cyclohexane dicarboxylic acid diisononyl ester.Under normal pressure, hexahydrophthalic anhydride, isononyl alcohol and heterogeneous catalyst are added to the reaction kettle, to obtain cyclohexane dicarboxylic acid diisononyl ester.

The invention discloses a triisooctyl trimellitate / isononyl / isodecyl trimellitate plasticizer composition and a preparation method and application thereof, and the triisooctyl trimellitate / isononyl / isodecyl trimellitate plasticizer composition is prepared from trimellitic acid or trimellitic anhydride, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, the molar ratio of the trimellitic acid or the trimellitic anhydride to the total alcohol is 1: (3-4); the molar ratio of the isooctyl alcohol (A) to the isononyl alcohol (B) to the isodecyl alcohol (C) is (0.01-4): (0.01-4): (0.01-4). 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 the technical field of environment-friendly materials, and particularly discloses diisononyl sebacate as well as a preparation method and application thereof, and the diisononyl sebacate is prepared from the following raw materials: sebacic acid, isononyl alcohol, concentrated sulfuric acid (a catalyst), liquid caustic soda (a neutralizer), distilled water and activated carbon (a decolorizing agent). The preparation method of the diisononyl sebacate comprises the following steps: carrying out esterification reaction under the protection of nitrogen, sampling at regular time to detect the acid value, and when the acid value is less than 0.1 mg KOH / g, carrying out cooling, neutralization, dehydration, dealcoholization, decoloration and other operations to finally obtain the diisononyl sebacate. The diisononyl sebacate is used as a main plasticizer for medical PVC products and has the characteristics of low migration and low hemolysis rate, and the comprehensive performance of the diisononyl sebacate is superior to that of a traditional orthophthalic plasticizer.

The invention discloses a diisooctyl sebacate / isononyl / isodecyl sebacate plasticizer composition and a preparation method and application thereof, the diisooctyl sebacate / isononyl / isodecyl sebacate plasticizer composition is prepared from sebacic acid, isooctyl alcohol (A), isononyl alcohol (B) and isodecyl alcohol (C) through esterification reaction, and the molar ratio of sebacic 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 discloses a preparation method of a catalyst for preparing isononyl alcohol through liquid-phase hydrogenation of isononanal. The preparation method comprises the following steps: 1, weighing a carrier; 2, weighing the soluble salt of the active metal, putting the weighed soluble salt of the active metal into deionized water, mixing to form a solution, adding a precipitant, and carrying out a precipitation reaction to obtain a precipitation reactant; 3, stirring and aging the precipitation reactant at a constant temperature, and washing to obtain active component slurry; and 4, mixing the carrier weighed in the step 1 with the active component slurry obtained in the step 3, adding deionized water and an adhesive, kneading, carrying out extrusion molding, and roasting to obtain the catalyst. The carrier is a mixture of one or two of natural minerals containing SiO2 and natural minerals containing SiO2 subjected to acidification modification according to any ratio. The preparation method is simple to operate, mild in process condition and low in production cost, the aldehyde conversion rate and the alcohol selectivity can reach 99% or above during application, the stability of the catalyst is larger than or equal to 1500, and the preparation method is suitable for industrial production.

The present invention provides a kind of 3,5,5-trimethyl-1-hexanal liquid phase hydrogenation catalyst and its preparation method and application, relating to the field of catalysts; The catalyst obtained is with ZnO / SiO2 as carrier, and the Zn / Si molar ratio in the carrier is 1: 2-5, with Cu and Ni as active ingredients, and by mass percentage, the carrier content is 70-80%, the active component CuO content is 15-20%, and the NiO content is 5-10%. During preparation, silica sol and zinc nitrate are mixed and added to the reactor with stirring, alkali liquor is quickly added, and then the nitrate solution of active component is mixed and added thereto, and after neutralization, it is washed, filtered, dried, granulated, roasted, and finally sheeted into a ring type to obtain a catalyst. The catalyst obtained by the present invention, the isononanal conversion rate reaches more than 99%, and the isononanol selectivity reaches more than 99%, with excellent activity, selectivity and stability, which is conducive to industrial application promotion.

The invention discloses a dibutyl / isooctyl / isononyl / isodecyl terephthalate plasticizer composition as well as a preparation method and application thereof, the dibutyl / isooctyl / isononyl / isodecyl terephthalate plasticizer composition is prepared from terephthalic acid, butanol (A), isooctyl alcohol (B), isononyl alcohol (C) and isodecyl alcohol (D) through esterification reaction, and the molar ratio of terephthalic acid to total alcohol is 1: (2-3); the molar ratio of the butanol (A) to the isooctyl alcohol (B) to the isononyl alcohol (C) to the isodecyl alcohol (D) is (0.01-3): (0.01-3): (0.01-3): (0.01-3). The raw materials used in the synthesis process of the plasticizer composition are safe, the synthesis procedures and steps are simple, the manufacturing cost is low, and the plasticizer composition is suitable for industrial processing production and can be used as a substitute of an orthophthalic plasticizer or even a better improved product.

The invention discloses a preparation method of isononyl alcohol extension multi-branch chain alcohol polyether and a surfactant, and belongs to the technical field of chemical synthesis. The method comprises the following steps: taking isononyl alcohol as an initial raw material, and carrying out alkoxylation reaction on the isononyl alcohol and epoxypropane or epoxybutane to generate an isononyl alcohol alkoxylate mixture; the isononyl alcohol alkoxylate mixture is separated and purified, and a high-purity multi-branch chain alcohol intermediate is obtained; and carrying out ethoxylation reaction on the multi-branched chain alcohol intermediate serving as a raw material and ethylene oxide to obtain a multi-branched chain alcohol polyether product. According to the preparation method of the isononyl alcohol extended multi-branch chain alcohol polyether and the surfactant, the preparation process is simple and efficient, the atom utilization rate is extremely high, and the preparation method is suitable for industrial large-scale production and has wide application prospects and economic benefits.

The invention discloses isononyl alcohol polyoxyethylene ether as well as a preparation method and application thereof, and relates to the technical field of surfactants. The invention relates to a preparation method of isononyl alcohol polyoxyethylene ether, which comprises the following steps: (1) adding isononyl alcohol and a catalyst into a reaction kettle, introducing nitrogen into the reaction kettle, heating and stirring; the catalyst is a modified carrier-loaded palladium-cobalt catalyst; (2) continuing to heat, adding ethylene oxide into the reaction kettle for reaction, and vacuumizing and dehydrating after the pressure and the temperature are constant; (3) continuously heating, and introducing ethylene oxide into the reaction kettle again until the pressure of ethylene oxide in the reaction kettle is constant; and (4) when the addition amount of the ethylene oxide reaches a theoretical value, stopping feeding the ethylene oxide, cooling, aging until the pressure is constant, filling nitrogen, and discharging to obtain the isononyl alcohol polyoxyethylene ether. The isononyl alcohol polyoxyethylene ether prepared by the method disclosed by the invention has a relatively high polymerization degree and a relatively low molecular weight distribution coefficient.