380 results about "Mesitylene" patented technology

A method for providing an anhydrous route for the synthesis of amine capped coinage-metal (copper, silver, and gold) nanoparticles (NPs) using the coinage-metal mesityl (mesityl=C6H2(CH3)3-2,4,6) derivatives. In this method, a solution of (Cu(C6H2(CH3)3)5, (Ag(C6H2(CH3)3)4, or (Au(C6H2(CH3)3)5 is dissolved in a coordinating solvent, such as a primary, secondary, or tertiary amine; primary, secondary, or tertiary phosphine, or alkyl thiol, to produce a mesityl precursor solution. This solution is subsequently injected into an organic solvent that is heated to a temperature greater than approximately 100° C. After washing with an organic solvent, such as an alcohol (including methanol, ethanol, propanol, and higher molecular-weight alcohols), oxide free coinage NP are prepared that could be extracted with a solvent, such as an aromatic solvent (including, for example, toluene, benzene, and pyridine) or an alkane (including, for example, pentane, hexane, and heptane). Characterization by UV-Vis spectroscopy and transmission electron microscopy showed that the NPs were approximately 9.2±2.3 nm in size for Cu°, (no surface oxide present), approximately 8.5±1.1 nm Ag° spheres, and approximately 8–80 nm for Au°.

Solvent mixtures useful for processing bulk heterojunction materials and methods for selecting the same are disclosed, wherein Hansen solubility parameters are utilized to select the solvent mixture. A solvent system using a fully nonhalogenated solvent mixture is disclosed. Also disclosed is a solvent mixture containing 20 vol. % acetophenone (AP) in mesitylene (MS), wherein the performance of the solvent system is comparable to dichlorobenzene.

The present invention provides fully renewable engine fuels derived completely from biomass sources. In one embodiment the fully renewable engine fuel is comprised of one or more low carbon number esters, one or more pentosan-derivable furans, one or more aromatic hydrocarbon, one or more C4-C10 straight chain alkanes derivable from polysaccharides, and one or more bio-oils. In addition, the fuel may contain triethanolamine. Such a lower octane renewable fuel may be utilized, for example, in automobile fuel, 100 LL aviation fuel applications, and turbine engine applications. These ethanol-based, fully renewable fuels may be formulated to have a wide range of octane values and energy, and may effectively be used to replace 100 LL aviation fuel (known as AvGas), as well as high octane, rocket, diesel, and turbine engine fuels. In another embodiment, there is provided a synthetic high octane aviation fuel comprising isopentane and mesitylene, and process of producing same from a biomass.

The invention discloses a sulfide functionalized covalent organic frame material, The material has a structural unit shown in the specification, and is obtained by the following steps: adding 2,5-Bis(3-(ethylthio)propoxy)-terephthalohydrazide and benzenetricarboxaldehyde into a mixed solvent of 1,4-dioxane and mesitylene, adding an aqueous acetic acid solution into the above mixture and reacting at 120 DEG C for 1-3 days. The material has a mesoporous structure, has BET specific surface area of 470-480 m<2>?g<-1>, has good selective identification for mercury ions, and can be used for removal of the mercury ions.

The invention discloses a microwave auxiliary preparation method of a keto-enamine covalently linked organic framework. The method comprises the following steps: charging 1 , 3 , 5-triformylphloroglucinol and p-phenylenediamine into solvent, and ultrasonically dispersing to form suspension; the solvent is mixed solvent of sym-trimethylbenzene, dioxane and acetum; freezing, by liquid nitrogen, vacuumizing and degassing the suspension for at least three times, then sealing, carrying out the thermal reaction for 1 hour under the assistance of microwaves at the temperature of 100 DEG C, and obtaining a crude product; and centrifuging the crude product, collecting insoluble matters, washing the insoluble matters sequentially by sym-trimethylbenzene and acetone to obtain the keto-enamine covalently linked organic framework, and obtaining the keto-enamine covalently linked organic framework. The method is pollution-free, the reaction condition is moderate and simple, the requirement on equipment is simple, and the method is suitable for the industrialized mass production.

This invention discloses a method for separating C9 aromatic hydrocarbons by double-solvent extraction and rectification. The method comprises: (1) pre-fractionating C9 aromatic hydrocarbon mixture, and collecting the rich fraction containing mesitylene and o-methyl ethyl benzene; (2) introducing the rich fraction into the middle of a double-solvent extraction-rectification column, introducing high-boiling-point solvent from the top of the column and low-boiling-point solvent from the bottom of the column, and extracting to obtain mixed fractions containing mesitylene and the low-boiling-point solvent at the top of the column and mixed fractions containing o-methyl ethyl benzene and the high-boiling-point solvent at the bottom of the column; (3) separating the mixed fractions in a solvent recovery column to obtain mesitylene and o-methyl ethyl benzene products, discharging, and recycling the solvents. The method significantly expands the relative volatility between trimethyl benzene and o-methyl ethyl benzene by using high-boiling-point and low-boiling-point solvents.

The invention provides a catalyst COF-5 for carbon dioxide photo-reduction and a preparation method thereof. The preparation method includes dissolving hexahydroxytriphenylene and 1,4-benzenediboronic acid in a mass ratio of 16:25 in a mixed solution of dioxane and mesitylene in a volume ratio of 1:1 according to a solvothermal method, and stirring uniformly to obtain a precursor solution; preparing the COF-5 from the precursor solution in a reactor by means of solvothermal heating. The preparation method initiatively synthesizes the COF-5 in the reactor according to the solvothermal method and is simpler and more convenient to operate and less in energy consumption during reaction as compared with a traditional method, and the COF-5 photocatalytic material prepared by the method has excellent CO2 photo-reducing capacity in full light.

The invention relates to a method for separating and producing 1,3,5-trimethylbenzene through hydrocracking heavy aromatic hydrocarbons to mainly solve technical problems of low added value of the heavy aromatic hydrocarbons, and complex flow, low product purity, low yield and the like in separation of 1,3,5-trimethylbenzene monomers from the heavy aromatic hydrocarbons. According to the method, hydrogen type binder-free ten-membered ring zeolite loading 0.005-0.5% by mass of Pt or Pd is adopted as a catalyst, hydrogen and the heavy aromatic hydrocarbons which are raw materials undergo hydrocracking treatment, and 1,2,4-trimethylbenzene and heavy aromatic hydrocarbons having boiling points greater than the boiling point of the 1,2,4-trimethylbenzene in products are returned to a reactor, so BTX aromatic hydrocarbon yield increase and 1,3,5-trimethylbenzene separation production are realized. The method well solves the problems, and can be used for the industrial production for yield increases of the BTX (benzene, toluene and xylol) aromatic hydrocarbon and the 1,3,5-trimethylbenzene.

The present invention provides non-petroleum high-octane fuel derived from biomass sources, and a method of producing same. The method of production involves reducing the biomass feedstocks to sugars, fermenting the sugars using microorganisms or mutagens thereof to produce ethanol or acetic acid, converting the acetic acid or ethanol to acetone, and converting the acetone to mesitylene and isopentane, the major components of the renewable engine fuel. Trimerization of acetone can be carried out in the presence of a catalyst containing at least one metal selected from the group consisting of niobium, iron and manganese. The ethanol can be converted to mesitylene in a dehydration reaction in the presence of a catalyst of zinc oxide / calcium oxide, and unreacted ethanol and water separated from mesitylene by distillation. These ethanol-based, biomass-derived fuels are fully renewable, may be formulated to have a wide range of octane values and energy, and may effectively be used to replace 100 LL aviation fuel (known as AvGas), as well as high-octane, rocket, diesel, turbine engine fuels, as well as two-cycle, spark-ignited engine fuels.

The invention relates to a preparation method of a covalence organic framework material for detecting trace water in an organic solvent. The preparation method adopts a solvothermal method. The preparation method comprises the following steps: mixing 1,4-dihydroxy terephthalaldehyde, 2,4,6-tri(4-amino phenyl)-1,3,5-triazine, acetic acid, o-dichlorobenzene or mesitylene, and N,N-diethylacetamide, and ultrasonically uniformly dispersing; transferring a tube with a reaction solution to an environment with the temperature of 120 DEG C to react for 3d; and centrifugally separating obtained red solids, and alternately cleaning the separated solids by using tetrahydrofuran and dichloromethane, and then drying to obtain the needed covalence organic framework material. The preparation method has the advantages that the covalence organic framework material prepared by the method is high in crystallization degree, good in heat stability and chemical stability, stable in fluorescence performance, high in sensitivity to the trace water in the organic solvent, and can be reused for multiple times, so that an effective way is provided for detecting the trace water.

The invention discloses a preparation method of the MOF-metal nanoparticle-COF composite material. The method comprises the following steps: dispersing MOF into a solution containing a metal ion precursor, adding a sodium borohydride solution or performing illumination reduction, or performing hydrogen reduction after centrifugation to obtain the MOF-metal nanoparticle composite material. Activating at a high temperature of 120-150 DEG C and then dispersing in 1, 3-butanediol; the method comprises the following steps: adding 1, 4-dioxane and mesitylene into a mixed solvent of 1, 4-dioxane andmesitylene; then adding a small amount of aldehyde group organic ligand and ultrasonically and uniformly mixing; subsequent addition of acetic acid, adding a corresponding amount of amino organic ligand, and continuously stirring for a period of time to obtain an MOF-metal nanoparticle-COF seed crystal compound; and adding an aldehyde group organic ligand and an amino group organic ligand, uniformly stirring and mixing, adding a corresponding amount of acetic acid, and continuously stirring, heating and preserving heat to obtain the MOF-metal nanoparticle-COF compound. Covalent binding of thetwo materials is achieved through a Schiff base reaction between aldehyde groups on the surfaces of the seed crystals and amino groups on the surfaces of the MOF materials, the binding force is stableand firm, the preparation method is simple, the method can be used for mass production, and traditional high-temperature and high-pressure reaction conditions are not needed in the compounding process.

The invention provides a synthesis method of a porous organic covalent frame material with a triazine structure. The synthesis method comprises the steps of in a 1,4-dioxane-mesitylene-acetic acid mixed solvent, carrying out solvothermal reaction on p-phenylenediamine and cyanuric chloride for 70 to 72h at 115 to 120 DEG C, repetitively washing a product through tetrahydrofuran and methyl alcohol,drying, grinding, and obtaining earthy yellow powder which is a target object. The synthesis method provided by the invention has the characteristics of cheap and easy-to-get raw materials, simple synthesis process, mild reaction conditions, low synthesis cost, high yield and the like; the synthesized COF material is large in specific surface area, low in density, and high in nitrogen content, and has a better application prospect in the fields of adsorption, drug release, photoelectricity functions, catalysis and the like.

The invention discloses a method for extracting mesitylene fractions rich in hydrocracking C 9 by combination of continuous lateral line distillation and extractive distillation, comprising the following steps: (1) material hydrocracking C 9 aromatic is added into a continuous lateral line distillation tower, the tower bottom is heated, fractions 2 with a boiling range of 155 DEG C to 170 DEG C, fractions 3 with a boiling range of 170 DEG C to 190 DEG C and fractions 4 with a boiling range of 190 DEG C to 210 DEG C are obtained at the same time after pretreatment, content of mesitylene in the fractions 2 achieves above 90 percent, and a little mesitylene and a great deal of heavy aromatic are contained in the fractions 3 and the fractions 4; (2) the fractions 2 enter an extractive distillation tower, content of mesitylene fractions on the top 5 of the extractive distillation tower achieves above 98 percent, and fractions 6 containing a great deal of extraction solvent and heavy aromatic hydrocarbon are left at the tower bottom; (3) the fractions 6 are treated through a solvent recovery tower, heavy aromatic fractions 7 are left on the top of the solvent recovery tower, a tower reactor extracts solvent, and the solvent flows into the extractive distillation tower for recycling use. The invention only needs one distillation tower, obviously improves the efficiency, and lowers the energy consumption and the cost.

The invention discloses an imine bond linked covalent organic framework (COF). A preparation method of the COF comprises the following steps: adding 2,5-dialkynylpropoxy terephthalaldehyde and sym-tris(4-aminophenyl)benzene to a solvent and carrying out ultrasonic dispersion to form suspension, wherein the solvent is a mixed solvent of mesitylene, n-butyl alcohol and an acetic acid solution; carrying out liquid nitrogen refrigeration-vacuumizing-degassing treatment on the suspension, sealing the suspension and carrying out microwave-assisted solvothermal reaction, thus obtaining a crude product; and after centrifuging the crude product, collecting an insoluble substance and washing and drying the insoluble substance, thus obtaining the imine bond linked COF. The method is pollution-free, is mild and simple in reaction conditions, has simple requirements for equipment and is suitable for large-scale industrial production.

The invention discloses a method for continuous extraction and distillation and separation of acetonitrile- toluene azeotrope. The method is described as the following: using propyl benzene, butylbenzene, isobutylbenzene, sec- butylbenzene, tertiarybutyl phenol, mesitylene, p- diethyl benzene or tertiary-butyl toluene as the extractant, operating in a extracting- fractionating tower at a normal pressure or reduced pressure with a mass ratio of extractant in extracting- fractionating tower to overhead being 2: 1- 10: 1 and a feeding temperature of extractant of 25- 80 Deg. C, the acetonitrile- toluene azeotrope entering from the middle of extracting- fractionating tower, picking the qualified content of acetonitrile from the head of tower with a reflux ratio of 1: 1- 5: 1, toluene and solvent from the bottom of the tower flowing into the middle of the extractant recovery tower, the toluene being picked from the head of extractant recovery tower with a reflux ratio of 2: 1- 10: 1, and the high-purity extractant which can be circularly used being picked from the bottom of the extractant recovery tower. The merit of the invention is that using extractant to destroy acetonitrile- toluene azeotrope,the high purity acetonitrile and toluene are prepared.

The invention discloses a method for synthesis of an MCM-22 molecular sieve. The method is characterized in that a molecular sieve is synthesized under hydrothermal crystallization conditions; a used template agent contains hexamethylene imine and aniline; and a mole ratio of the hexamethylene imine to the aniline is less than 1.2. The method reduces a hexamethylene imine use amount, reduces a cost, inhibits conversion of the MCM-22 molecular sieve into a ZSM-35 molecular sieve, realizes obvious improvement of a product specific surface area and obviously promotes improvement of a mesitylene saturated adsorption capacity.

A process for extracting phenol from a phenol-containing aqueous solution is disclosed. The process entails contacting the aqueous solution with an extracting agent that comprise a mixture of 60 to 99% of methyl isobutyl ketone, 1 to 40% of anisole and 0 to 20% of mesitylene.

The invention relates to a method for preparing mesoporous SBA-15 unstuck micro spheres, in particular a method for preparing mesoporous SBA-15 unstuck micro spheres for high-efficiency liquid chromatography. According to the method, a three-block copolymer P123 is used as a template agent, tetraethoxysilane, hydrochloric acid, potassium chloride, mesitylene, ammonium fluoride and polyvinyl alcohol are used as raw materials, and the dispersity of the mesoporous silica spheres can be regulated by adding polyvinyl alcohol. The mesoporous micro spheres prepared by the method are smooth and unstuck basically, and the addition of poly(vinyl acetate) (PVA) prevents the sticking of the micro spheres without influencing the specific surface area and mesoporous aperture obviously.

The invention provides a 6-mesitylene-6H-6-boron hetero benzo[cd]pyrene derivative containing substituted or non-substituted carbazolyl. Due to the bipolar transmission characteristic, the derivative can effectively balance transmission of carriers and improve transmission efficiency, by using the derivative in phosphorescent organic light-emitting devices as a main material. The invention also provides an organic electroluminescent device that has increased current efficiency, reduced turn-on voltage and good stability, and solves the problems of low transmission efficiency or poor stability of phosphorescent organic light-emitting main materials in the prior art.

Disclosed is a method for preparing an aromatic hydrocarbon by direct conversion of methane, comprising the following steps: a catalyst is placed in one reactor, at the same time, a mixed gas of CH4 and an alkylating agent is introduced for reaction, thus implementing coupling of two reactions to acquire the aromatic hydrocarbon. The beneficial effect of the present invention is such that: the present invention is capable of increasing significantly the conversion rate of methane and the yield of the aromatic hydrocarbon, inhibiting the generation of an oligomeric polycyclic aromatic hydrocarbon, and extending the service life of the catalyst. The method of the present invention allows for reaction within 30 minutes and keeps the conversion rate steady between 25% and 45%. When the reaction time reaches 1200 hours, the conversion rate is kept steady, while the catalyst still remains active. An anaerobic aromatization reaction of methane and an alkylation reaction of the aromatic hydrocarbon are conducted simultaneously, thus implanting heat coupling. The temperatures, space velocities, and raw materials of the two reactions are coordinated within a certain scope. The types of post-reaction products remain unchanged, thus facilitating analysis and comparison. Benzene and toluene are consumed in the reactions, while xylene and mesitylene are generated, which are of higher values.

The invention relates to a synthesis method of polysubstituted hindered phenol antioxygen. In the method, the composition of tertiary amine and secondary amine serves as catalyst to synthetize an intermediate product; after the reaction ends, solvent and the catalyst are distilled to obtain an intermediate crude product; the intermediate is added into halogenated hydrocarbon solution containing organic ether, sulfuric acid and mesitylene reactant once or in batches at room temperature to synthetize polysubstituted hindered phenol antioxygen. The method of the invention avoids the phenomenon that the traditional method utilizes acid to inactivate catalyst and crystallize to produce intermediate 3,5-dialkyl group-4-hydroxy benzyl methyl ether at low temperature; at normal temperature, catalyst is added once, and quick feeding is carried out to synthetize the polysubstituted hindered phenol antioxygen. The method simplifies operation steps, shortens reaction time, reduces material loss, lowers production cost, realizes catalyst recycle and obtains higher yield.

The invention discloses a complex and application of monophosphine monoazacyclo-carben nickel containing tricyclic hexyl phosphine. The molecular formula of the complex of the monophosphine monoazacyclo-carben nickel is (PCy3)Ni[(RNCHCHNR)C]X2; in the molecular formula, the PCy3 is tricyclic hexyl phosphine; the R is tertiary butyl, 2,6-diisopropyl phenyl or mesitylene; the X is chlorine or bromine. The complex of monophosphine monoazacyclo-carben nickel containing tricyclic hexyl phosphine is simple to prepare, easy to operate, easy in purification of products and high in yield, can stably exist in air, and can efficiently catalyze cross coupling reaction of aryl methyl ether and aryl Grignard reagent.

The invention discloses an alkylated solid acid catalyst and a preparation method thereof, and relates to an alkylated solid acid catalyst for a process of preparing mesitylene by mixed C9 aromatic hydrocarbon through alkalation separation and a preparation method thereof. The catalyst has higher alkylation conversion rate of the mixed C9 aromatic hydrocarbon and yield of the mesitylene under high temperature and normal pressure conditions. The catalyst takes heteropoly acid as a main active constituent, modified zirconium oxide as a carrier and alkali metal or rare earth element metal as a modifying agent; and calculated as the weight of zirconium oxide, the adding amount of the alkali metal is between 0.01 and 10 weight percent, the adding amount of the rare earth element metal is between 0.01 and 10 weight percent, the loading capacity of the heteropoly acid is between 5 and 30 weight percent, and the balance being the carrier.

The invention discloses an ionic liquid type monophosphine monoimidazolium salt nickel (II) complex and preparation and application thereof. The chemical molecular formula of the monophosphine monoimidazolium salt nickel (II) complex is (Ph3P)Ni{[(RNCHCHNR)CH]X}X2, wherein R is selected from one of C1-C4 saturated alkyl, phenmethyl, 2,6-diisopropylphenyl and mesitylene; and X is halogen and selected from one of chlorine, bromine or iodine. The monophosphine monoimidazolium salt nickel (II) complex has good catalytic activity on Kumada cross-coupling reaction between aryl Grignard reagent and aryl halide or halogenated pyridine.

Mesitylene is difficult to separate from 1,2,4-Trimethylbenzene because of the proximity of their boiling points. They are readily separated by azeotropic distillation. Effective agents are isopropyl acetate, 2-pentanol and acetonitrile.

The invention discloses a three-dimensional fluorescent covalent organic framework material as well as a preparation method and application thereof. A hexamethyl biphenyl aldehyde derivative and a series of pyrenylamine derivatives are used as raw materials, o-dichlorobenzene and mesitylene are used as solvents, acetic acid is used as a catalyst, and solvothermal reaction is carried out for several days. After the reaction is finished, suction filtration and washing are sequentially carried out by using DMF and THF, carrying Soxhlet extraction is carried out for 24 hours, and vacuum drying iscarried out to obtain yellow powder, namely a target product. Hexamethyl biphenyl tetraaldehyde based on a steric effect and pyrenyl tetramine with fluorescent property are used as construction monomers, the synthesized Turn-on type three-dimensional fluorescent covalent organic framework has a rich cavity structure and a conjugated three-dimensional skeleton, the aggregation-induced quenching effect of fluorophores is avoided, the sensitivity of host-guest response of the material is improved, the material has a good application prospect in the field of fluorescence sensing, and the three-dimensional covalent organic framework is applied to the field of VOCs molecular decoding for the first time.

The invention belongs to the technical field of polymer materials, and concretely relates to a functionalized organosilicon compound containing benzocyclobutene, and a preparation method thereof. The functionalized organosilicon compound containing the benzocyclobutene is prepared through reacting an organosilicone precursor containing the benzocyclobutene and a substrate containing hydroxyl under an alkaline condition, and can be subjected to reduced pressure distillation or column chromatography purification. The functionalized organosilicon compound containing the benzocyclobutene can be used for polymerization reaction, and can be pre-polymerized in a sym-trimethylbenzene solvent at the temperature of 150 to 180 DEG C to obtain a prepolymer with a certain molecular weight, and a thin film is prepared through further spin-coating and post curing; a nitrine type photosensitizer can be added in a monomer prepolymer containing double bonds so as to be used for preparing a photoresist, which can be applied in the fields of electronic packaging and integrated circuits.