127 results about "Trimethylbenzenes" patented technology

The invention discloses a catalyst for a hydrogen storage material as well as a preparation method and application thereof, and belongs to the technical field of hydrogen storage materials and preparation thereof. The problems that an existing magnesium-based solid hydrogen storage material is high in hydrogen desorption temperature, slow in low-temperature dynamics and the like are solved. According to the invention, nickel chloride hexahydrate, polyether P123, polyether P127, dopamine hydrochloride, 1, 3, 5-trimethylbenzene and ammonia water are used as raw materials to prepare the catalyst which takes carbon as a carrier to wrap elemental Ni nanoparticles. The catalyst is applied to an Mg-based hydrogen storage material through a ball-milling method, and in the ball-milling mixing process, the carbon carrier can also serve as a grinding aid to inhibit Mg powder agglomeration and promote better combination between Mg and Ni, and meanwhile, the cycle performance of Mg powder hydrogen storage is improved. Mg2NiH4 / Mg2Ni generated in situ in the hydrogen absorption and desorption process inherits the superfine size and uniform dispersity of Ni nanoparticles, and shows high activity in the hydrogen absorption and desorption cycle of Mg.

The invention discloses anti-warping water-based optical cement for an optical diffusion film as well as a preparation method and application of the anti-warping water-based optical cement, and belongs to the technical field of optical diffusion films. The preparation method of the anti-warping water-based optical cement for the optical diffusion film comprises the following steps: mixing trimethylbenzene and ethylene glycol monobutyl ether to obtain a mixed solvent; adding an acrylic monomer and an initiator into the mixed solvent, and carrying out a heating reaction to obtain a reactant; the anti-warping water-based optical cement for the optical diffusion film is obtained by adding a neutralizing agent into reactants for a neutralization reaction, then adding water, stirring and mixing, the water-based optical cement can replace traditional optical cement to be applied to the optical diffusion film, the surface of a PET film is coated with the water-based optical cement, and a water-based optical cement thin film is formed after curing. The water-based optical cement film and the PET film form the optical diffusion film and then the optical diffusion film is applied to the display screen, the stress generated by the water-based optical cement in the curing process is small, the PET film can be prevented from warping, and therefore the performance of the optical diffusion film is improved.

The invention relates to a method for synthesizing mesitylene by gas-phase non-hydroisomerization of unsym-trimethylbenzene, which comprises the following step of: contacting the unsym-trimethylbenzene with a catalyst under a gas-phase non-hydroisomerization reaction condition in the presence of the catalyst, wherein the catalyst is an EWT structure molecular sieve, the total pore volume of the EWT structure molecular sieve is 0.20-0.51 cm < 3 >. G <-1 >, and the mesoporous volume is 0.11-0.37 cm < 3 >. G <-1 >. According to the method disclosed by the invention, the EWT structure molecular sieve with an ultra-large pore channel structure is adopted as the catalyst, and when the catalyst is used for synthesizing mesitylene through unsym-trimethylbenzene gas-phase non-hydroisomerization, the distribution conditions of raw materials and products are improved, the conversion rate of unsym-trimethylbenzene and the selectivity and the mass yield of mesitylene are improved, heavy component carbon deposition is slowed down, and the yield of mesitylene is improved. The service life of the catalyst is prolonged.

The invention relates to the field of solid electrolyte preparation, and particularly discloses a solid electrolyte preparation method, a solid electrolyte and a battery, and the solid electrolyte preparation method comprises the following steps: step 1, synthesis of a pyridyl covalent organic framework (PCOF): dissolving 1, 3, 5-triformyl benzene and 2, 6-diaminopyridine pyridyl amine monomers in a mixed solvent of m-trimethylbenzene and 1, 4-dioxane, and stirring to obtain a solid electrolyte solution; the preparation method comprises the following steps: adding an acetic acid catalyst under the protection of argon, reacting at 100-130 DEG C for 48-96 hours, and then carrying out centrifugal separation, cleaning, neutralization, secondary cleaning and drying to obtain PCOF powder; by introducing the flexible diethylene glycol (DEG) group with relatively high polarity, the interface contact between the DEG-PMCOF and the lithium metal electrode is tighter, the interface impedance is effectively reduced, the overall performance of the battery is improved, meanwhile, the overall toughness of the material is remarkably enhanced through the flexible characteristic of the DEG, the problems of crack generation and layering in the cycle process of the battery are reduced, and the service life of the battery is prolonged. The mechanical property and the long-term stability of the material are improved.

The embodiment of the invention provides a method for separating a benzenediol isomer and 5-indanol in a phenol-containing crude product, which comprises the following steps: rectifying the phenol-containing crude product to obtain mixed benzenediol with a distillation range of 240-300 DEG C; the method comprises the following steps: carrying out etherification reaction on mixed benzenediol with the distillation range of 240-300 DEG C obtained by rectifying crude phenol rectification residues by adopting etherification reaction: carrying out etherification reaction on the mixed benzenediol and an etherification reagent under the action of a catalyst, recovering excessive etherification reagent in a reactant after the reaction, and rectifying to obtain etherate; wherein hydroquinone dialkyl ether with the purity not lower than 98% is crystallized and purified by adopting a melt crystallization method or a solvent crystallization method; and / or reducing a part of etherate by using mixed trimethylbenzene and hydrobromic acid to obtain various benzenediol isomers and 5-indanol.

The invention discloses a catalyst for preparing mesitylene. The catalyst is prepared from the following components: 65%-80% of a molecular sieve, 15%-30% of gamma-Al2O3 and 0.25%-2.5% of a metal element. The preparation method comprises the following steps: uniformly mixing a molecular sieve and a gamma-Al2O3 precursor substance respectively, adding a peptizing agent and an extrusion aid, and kneading to obtain an initial product; carrying out extrusion forming on the initial product, drying and roasting at high temperature to obtain a catalyst body; and carrying out equivalent-volume impregnation on the catalyst body and a metal salt solution for 24-26 hours, taking out and drying, and finally roasting at high temperature to obtain the mesitylene catalyst. The prepared catalyst has acid strength and pore size suitable for isomerization of 1, 2, 4-trimethylbenzene, dealkylation reaction and disproportionation reaction are effectively inhibited, generation of xylene and tetramethylbenzene is reduced, the selectivity of isomerization reaction can reach 67%, the yield of 1, 2, 4-trimethylbenzene can reach 24.5%, and waste of raw materials is reduced.

The invention discloses a preparation method of a catalyst for catalyzing directional polycondensation of acetone to synthesize mesitylene, and belongs to the technical field of catalysis. The modified active metal supported catalyst is prepared from a catalyst carrier prepared by mixing a nitrogen-doped modified carbon carrier or a composite oxide with a molecular sieve, an active metal component, a metal modification additive component and a metal chelating agent. According to the present invention, the active component is loaded on the composite modified carrier through the isovolumetric impregnation method, and the metal modification auxiliary agent component is introduced through the ion exchange method to further modify the active component, such that the requirement of the catalysis of the directional deoxidation trimerization of the acetone to prepare the mesitylene is achieved, and the catalyst prepared by the method has advantages of low price, high activity, high selectivity, good stability and the like; the problem that the separation cost is increased due to the complex equipment requirement and the separation problem of mesitylene and methyl-ethylbenzene under the similar boiling point in the traditional mesitylene production method is avoided.

The invention relates to the technical field of C9 heavy aromatics, in particular to a method and device for producing mesitylene from C9 heavy aromatics, and the method comprises the following steps: firstly, in the presence of a catalyst, mixing the C9 heavy aromatics with hydrogen, performing dealkylation isomerization reaction and dehydrogenation separation to obtain a liquid-phase product, and then performing two-stage separation on the liquid-phase product to obtain mesitylene. And mesitylene is produced to the maximum extent. The C9 heavy aromatics are subjected to selective dealkylation and trimethylbenzene isomerization reaction, and the obtained product does not contain propylbenzene, and the content of methyl-ethylbenzene is 1t; the method has the advantages that the yield of mesitylene is more than or equal to 0.2%, the interference of methyl ethyl benzene on the separation of the mesitylene is eliminated, the loss of the mesitylene is small, the one-way yield of the mesitylene is more than or equal to 12%, the reaction process is simple, the mesitylene and unsym-trimethylbenzene products are high in purity, the unsym-trimethylbenzene can be recycled to further increase the yield of the mesitylene, the process is flexible, byproducts are few, the product value is high, and the utilization value of C9 heavy aromatic hydrocarbon resources is obviously improved.

The invention belongs to the technical field of new materials, and particularly relates to two zinc-based complexes as well as a preparation method and application thereof. The chemical general formulas are respectively [Zn2 (TMTA) (COO) (BPA) 2] n (UPC-198) and [Zn2 (TMTA) (COO) (BPE) 2] n (UPC-199), Zn is a divalent zinc ion, TMTA is a deprotonated 4, 4 ', 4' '-(2, 4, 6-triphenyl-1, 3, 5) tribenzoic acid ligand, BPA is 1, 2-bis (4-pyridyl) ethane, and BPE is 1, 2-bis (4-pyridyl) ethylene. Wherein the structure of the zinc-based complex belongs to a triclinic system and a P-1 space group, and the unit cell parameters of UPC-198 are as follows: the axial length # imgabs 0 #, the axial angle alpha is equal to 69.247 (3), the beta is equal to 88.215 (3), the gamma is equal to 68.462 (3), and the unit cell volume # imgabs 1 # Z is equal to 35. The unit cell parameters of the UPC-199 are as follows: the axial length # imgabs2 #, the axial angle alpha is equal to 69.029 (3), the beta is equal to 88.481 (3), the gamma is equal to 68.694 (4), and the unit cell volume # imgabs3 # Z is equal to 35. The zinc-based complex can be used for preparing an adsorption material, an antibacterial material, a catalytic material, a photoelectromagnetic material and a drug carrier material, belongs to a metal-organic framework structure, and is a composite functional porous material with great potential. The zinc-based complex can be applied to the field of low-carbon hydrocarbon gas separation.

The invention belongs to the technical field of medical nano-materials, and particularly relates to a preparation method of a nano-metal covalent organic framework material for enhancing cell ferroptosis by consuming glutathione as well as an obtained product and application of the nano-metal covalent organic framework material. The material is prepared by the following steps: firstly, preparing a metal organic ligand Cu3-PyCA3; the preparation method comprises the following steps: firstly, preparing a metal organic ligand Cu3-PyCA3, then mixing the metal organic ligand Cu3-PyCA3, 2, 5-diethoxybenzene-1, 4-bis (formylhydrazine), mesitylene, 1, 4-dioxane and a trifluoroacetic acid solution, and then reacting to obtain a nano metal covalent organic framework Cu3-MCOF; and finally, uniformly mixing the activated hyaluronic acid solution and the Cu3-MCOF, and intensely stirring to obtain the Cu3-MCOF-coated HA. The nano-metal covalent organic framework provided by the invention can consume glutathione to enhance cell ferroptosis, and the nano-metal covalent organic framework Cu3-MCOF can quickly react with glutathione, so that the framework structure of the Cu3-MCOF is seriously damaged, the crystalline state disappears, a large number of ribbons are further assembled and generated, glutathione is consumed, and the ferroptosis of cells is enhanced. The ferroptosis tumor treatment enhancer has an application prospect.

The present application belongs to the technical field of aromatic hydrocarbon production, and relates to a method and system for producing trimethylbenzene and quarterphenyl by alkylation. Light aromatic hydrocarbons and methanol are used as raw materials, and alkylation is carried out under the catalysis of a modified molecular sieve catalyst and at a temperature of 250-600 DEG C. The material after alkylation is subjected to further alkylation under the catalysis of the modified molecular sieve catalyst and at a temperature of 250-600 DEG C. The modified molecular sieve catalyst is composed of a molecular sieve and a metal oxide supported in the molecular sieve, the molecular sieve is one or more of HY, Hbeta, IM-5, NU87, EU-1 and mordenite, and the metal in the metal oxide is one or more of Mg, Cu, La, Zn and Mo. The present application solves the technical problems of low content of trimethylbenzene and quarterphenyl components and difficult separation of trimethylbenzene and quarterphenyl in the industrial separation method by directly producing trimethylbenzene and quarterphenyl.

According to the method, a heteroatom EWT structure molecular sieve with a framework containing aluminum atoms and heteroatoms is adopted as a catalyst, the molecular sieve has the advantage of improving the utilization rate of an acid center, and when the molecular sieve is used for a gas-phase non-hydroisomerization reaction of the unsym-trimethylbenzene, the utilization rate of the acid center is increased; according to the present invention, the activity, the selectivity and the stability are high, the catalytic performance is significantly improved, the mesitylene selectivity and the mesitylene yield are higher than the heteroatom-free [Si, Al]-EWT structure molecular sieve, and the by-products such as tetratoluene and xylene are significantly reduced.

The present invention relates to a preparation method and application of a catalyst for catalyzing the production of mesitylene from trimethylbenzene. The method comprises the following steps: firstly preparing a multi-level pore Hβ zeolite molecular sieve, then mixing the multi-level pore Hβ zeolite molecular sieve with a hydrogen-type mordenite molecular sieve and a binder, adding a nitric acid solution and water, extruding the zeolite molecular sieve into strips, drying the strips and then calcining the strips at 500-750°C to obtain an unmodified catalyst I; performing impregnation modification on the unmodified catalyst I, then drying and calcining the strips to obtain a modified catalyst; and reducing the modified catalyst in a hydrogen atmosphere at 0.3-1MPa and 350-450°C to obtain a catalyst for isomerization of trimethylbenzene to mesitylene. The present invention utilizes a multi-level pore Hβ zeolite molecular sieve and a hydrogen-type mordenite molecular sieve to form a composite molecular sieve catalyst, then adding rare earth metals, Group VIII, Group IIIB and Group IVB as modifying elements, and reducing the catalyst with hydrogen to improve the selectivity and thermal stability of the catalyst, while increasing the life of the catalyst and improving the economic efficiency of the device.

The invention discloses a sulfonated aromatic hydrocarbon regulated biomass-based hard carbon material, a preparation method thereof and application of the sulfonated aromatic hydrocarbon regulated biomass-based hard carbon material in a sodium-ion battery. The preparation method of the biomass-based hard carbon material comprises the following steps: (1) carrying out solid-liquid mixing on biomass and an aqueous solution of sulfonated aromatic hydrocarbon, drying, and uniformly mixing the sulfonated aromatic hydrocarbon and the biomass; the selected sulfonated aromatic hydrocarbon comprises at least one of benzenesulfonic acid, aminobenzene sulfonic acid, benzene disulfonic acid, carboxyl benzenesulfonic acid, methyl benzenesulfonic acid and tritoluenesulfonic acid. And (2) carrying out two-stage carbonization, low-temperature pre-carbonization and high-temperature re-carbonization on the mixed material to obtain hard carbon, and then sequentially carrying out crushing, acid pickling, water washing and drying. And the sulfonated aromatic hydrocarbon substance guides ordered arrangement of the carbon layer through pi-pi stacking. The obtained biomass-based hard carbon material not only has high yield, but also has a graphite microcrystalline structure beneficial to sodium storage. The hard carbon structure obtained through optimization provides a large number of sodium storage sites, so that the sodium storage performance of the battery is improved.

The invention belongs to the technical field of preparation of herbicides, and particularly relates to a preparation method of tralkoxydim. The preparation method comprises the following steps: carrying out ethylation reaction on 3-hydroxy-5-(2, 4, 6-trimethylphenyl)-2-propoximido-cyclohex-2-ene-1-ketone and halogenated ethane under an alkaline condition, so as to prepare tralkoxydim. According to the method, the use of ethoxyamine hydrochloride or ethoxyamine in the traditional process is innovatively avoided, the raw material cost is reduced, the ethylation reaction is carried out by using halogenated ethane, the reaction raw materials are cheap and easy to obtain, meanwhile, single sodium / potassium halide wastewater is produced, the wastewater treatment process is greatly simplified, meanwhile, the generation of carnallite wastewater and carnallite-containing solid waste is eliminated, and the method is suitable for industrial production. The method has the advantages of environmental protection, economy and simple process, and is suitable for industrial large-scale production.

The invention relates to the technical field of chemical analysis, and particularly discloses a method for detecting a residual solvent in 1, 3, 5-trihydroxybenzene. A chromatographic column with 6% cyanopropyl benzene-94% dimethyl siloxane as a stationary liquid is adopted as a detection chromatographic column, the column temperature is set to be 35-45 DEG C and maintained for 4-6 min, then the temperature is increased to 195-205 DEG C at the rate of 8-12 DEG C / min and maintained for 4-6 min, the temperature of a constant-temperature furnace is 95-105 DEG C, the temperature of a detector is 255-265 DEG C, the split ratio is 8-12: 1, and the detection of 1, 3, 4-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5 The method can be used for simultaneously and quantitatively detecting the residual solvent 1, 3, 5-trihydroxybenzene, namely the 1, 3, 5-trihydroxybenzene, namely the 1, 3, 5-trihydroxybenzene, namely the 1, 3, 5-trihydroxybenzene, the methyl alcohol and the ethyl acetate, is more beneficial to reflecting the quality of the 1, 3, 5-trihydroxybenzene, and is of great significance for establishing a quality control system of the 1, 3, 5-trihydroxybenzene and ensuring the product quality and the medication safety of the 1, 3, 5-trihydroxybenzene.

The invention discloses a method for preparing nitro-mesitylene through a micro-channel nitration reaction. The method comprises the following steps: respectively conveying mesitylene, fuming nitric acid and sulfuric acid to a micro-channel reaction module through a metering pump, and completing nitration reaction within a retention time of tens of seconds to several minutes. The introduction sequence of nitration reaction materials, the reaction retention time and the reaction temperature are cooperatively controlled, the nitration reaction is completed in the microchannel reactor in a continuous flow mode, operation is easy and convenient, safety is high, efficient continuous production can be achieved, meanwhile, emission of three wastes is reduced, and the industrial application advantages of being environmentally friendly and economical are achieved.

The application discloses a kind of by polydopamine mesoporous nanoparticles crosslinked sulfhydrylated hyaluronic acid hydrogel and its preparation method and application, with dopamine and 4-formylphenylboronic acid as monomer, with trimethylbenzene as and poloxamer as template agent, in weak alkaline (pH=8.4), oxygen exists in the environment, by the oxidation self-polymerization reaction between monomer Preparation of polydopamine nanoparticles with mesoporous structure.Then the water dispersion of polydopamine nanoparticles is mixed with sulfhydrylated hyaluronic acid solution according to certain proportion, and the hydrogel dressing with injectable property is prepared.The hydrogel is expected to be used as skin wound dressing for the treatment of diabetic wounds.

The invention provides a high-flash-point alkyd resin, an alkyd antirust paint composition as well as related products, a preparation method and application thereof, and belongs to the technical field of antirust paint. The high-flash-point alkyd resin disclosed by the invention is prepared from the following raw materials in parts by weight: 130 to 150 parts of polyol, 50 to 100 parts of enzymolysis cottonseed oil, 200 to 300 parts of oleic acid, 200 to 280 parts of hyodeoxycholic acid, 210 to 230 parts of phthalic anhydride, 20 to 40 parts of S-1500 # solvent oil, 15 to 30 parts of octadecene and 225 to 255 parts of trimethylbenzene. The high-flash-point alkyd resin provided by the invention can be used for preparing a paint coating which is faster in dryness and better in thick coating effect and anti-rust and anti-corrosion effects.

The invention relates to the technical field of composite materials, and discloses a composition and a preparation method and application thereof, the composition comprises resin, conductive carbon black, a first antioxidant, a second antioxidant and a cross-linking agent; wherein the mass content of metal elements in the conductive carbon black is not more than 10 ppm; wherein the first antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene and / or 1, 3, 5-tri (3, 5-di-tert-butyl-4'-hydroxybenzyl) isocyanuric acid, and the second antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene. Wherein the second antioxidant is bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and / or pentaerythritol tetra (3-lauryl thiopropionate), and the second antioxidant is a mixture of the first antioxidant and the second antioxidant. As a semiconductive shielding material, the composition provided by the invention not only has excellent insulation yellowing resistance, but also has excellent mechanical property and conductivity, and ensures better application of the material in preparation of power cables.

The present application relates to the technical field of catalyst preparation, and is a catalyst for producing mesitylene from C9 mixed aromatic hydrocarbons and a preparation method thereof.The former is a non-noble metal supported molecular sieve catalyst, the catalyst carrier comprises a molecular sieve and a binder, the molecular sieve accounts for 70% to 90% of the weight percentage of the catalyst carrier, the loading of each element accounts for 1wt% to 10wt% of the weight percentage of the catalyst carrier, and the total loading of elements accounts for 5wt% to 15wt% of the weight percentage of the catalyst carrier.The catalyst for producing mesitylene from C9 mixed aromatic hydrocarbons has good catalytic performance, is applied to the process of producing mesitylene from C9 mixed aromatic hydrocarbons as a catalyst for alkylation reaction and isomerization reaction, finally eliminates the interference of methyl ethyl benzene, maximizes the production of mesitylene, the content of methyl ethyl benzene is less than 0.5%, and the yield of mesitylene is greater than 25%.

The application mixes NaX type molecular sieve with kaolin mineral as a binder, then rolls into a ball, calcines at high temperature, converts kaolin into metakaolin, then treats with alkali, converts into X type molecular sieve in situ, then ion exchanges to prepare high selective adsorbent. The prepared adsorbent has high trimethylbenzene adsorption selectivity, compression strength and bulk density.

The present invention discloses a method for preparing curved carbon nanobelts by removing HCl by Pd catalysis, wherein the structure of the curved carbon nanobelts is shown as follows: wherein R is hydrogen, C 1‑20 Alkyl, C 1‑20 Alkoxy, mesitylene, phenyl or its large π extension derivative, n is 1 or 3. The product prepared by the method of the present invention can be regarded as a sidewall fragment of a (m, m)-type carbon nanotube. The present invention uses a compound with a borate group and a compound with a halogen to undergo Suzuki-Miyaura cross-coupling reaction and reductive aromatization reaction to obtain a carbon nanocyclic compound, and then further undergoes a Suzuki-Miyaura cross-coupling reaction and Pd-catalyzed deHCl to obtain armchair-type carbon nanobelts of different sizes. The synthesis method of the present invention is unique, the structure is novel, it has good photophysical properties, and it has potential applications in bottom-up growth of single-walled carbon nanotubes.

The application discloses a preparation method of a catalyst for catalyzing directional polycondensation of acetone to produce mesitylene and isophorone, and belongs to the field of catalysis technology. The catalyst is prepared by using a co-precipitation method to prepare magnesium-aluminum-zinc composite oxides, and simultaneously introducing active components and metal modified additive components in the co-precipitation process, and then drying and calcining to obtain a finished catalyst. The application realizes efficient synergistic effect of the active metal components and the additive metal components on the composite basic oxides and adjustment of the distribution of acid and base sites of the catalyst, so that the effect of co-producing isophorone and mesitylene through directional polycondensation of acetone is achieved. The catalyst prepared by the method is suitable for catalyzing polycondensation of acetone to co-produce isophorone and mesitylene, and has the advantages of simple preparation process, high catalytic activity and good stability.

The invention is applicable to the technical field of biomass energy catalysis and conversion, and provides a high-activity and high-stability nickel-cobalt alloy catalyst and a synthesis method and application thereof, and the synthesis method comprises the following steps: preparing S-1 zeolite; the preparation method comprises the following steps: mixing S-1 zeolite with an aqueous solution of Ni (NO3) 2.6 H2O and an aqueous solution of Co (NO3) 2.6 H2O for dipping, placing the mixture in a tetrapropylammonium hydroxide solution for hydro-thermal treatment, and performing static calcination to obtain a NixCoyO at S-1 nanocrystal; mixing the NixCoyO (at) S-1 nanocrystal with polymers P123, F127, dopamine hydrochloride and 1, 3, 5-trimethylbenzene, performing ultrasonic dispersion in a mixed solvent of water and ethanol, adding ammonia water for reaction, and collecting NixCoyO (at) S-1 (at) mPDA; and carrying out carbonization and reduction on the NixCoyO (at) S-1 (at) mPDA to obtain the NixCoy (at) S-1 (at) mC catalyst. The prepared catalyst has excellent hydrodeoxygenation performance, vanillin can be efficiently converted into 2-methoxy-4-methylphenol (MMP) under mild conditions, and the yield exceeds 94%.

The present invention relates to a process and a device for the conversion of aromatic compounds, in which the aromatic compounds of a hydrocarbon feedstock (1) comprising aromatic compounds containing 9 carbon atoms are isomerized in an isomerization unit (A) in the presence of a bifunctional isomerization catalyst having a hydro / dehydrogenating function and a hydroisomerizing function, to produce an isomerization effluent (10) enriched in trimethylbenzenes. The present invention also relates to a process and a device for the production of aromatic compounds, comprising the process and the device for the conversion of aromatic compounds.

The application relates to an asymmetric catalytic synthesis method and application of chiral azido tertiary alcohol and azulenic compound. The method is characterized in that under an air atmosphere, a racemic azido tertiary alcohol compound ((+ / -) I) and tri (4-methylphenyl) phosphorus (II) are reacted in toluene by taking chiral tartaric acid derivative phosphoric acid C1, a spirochiral phosphoric acid C2 or octahydroazulene phosphoric acid C3 as a chiral catalyst, the reaction is carried out at 30 DEG C for 17-72 hours, and target chiral azido tertiary alcohol compound (I) and chiral azulenic compound (III) are obtained through separation and purification. S I) and chiral azulenic compound (III) can be used for synthesizing chiral ligand IV, and deuterium water can be added in the reaction system to be used for synthesizing chiral deuterated azulenic compound (D-III).

The invention discloses a composite nanofiltration membrane and a preparation method and application thereof, and belongs to the technical field of composite membranes, and the preparation method comprises the following steps: carrying out interfacial polymerization reaction on a terephthalaldehyde mesitylene solution and an ethylenediamine aqueous solution on the surface of an HPAN membrane at a two-phase junction at normal temperature to obtain the composite nanofiltration membrane. The invention also discloses the composite nanofiltration membrane prepared by the preparation method and application of the composite nanofiltration membrane in sewage treatment. Compared with a traditional interfacial polymerization nanofiltration membrane, the obtained composite nanofiltration membrane has the advantages that the preparation process is simpler, quicker and milder, the stability is extremely high, the antifouling capacity is high, and the composite nanofiltration membrane can be used for dye wastewater treatment.

The utility model provides a carbon-reduced tail gas recovery device and a hydrogen peroxide production system, and relates to the technical field of batteries. The tail gas recovery device comprises a nitrogen making machine, an air compressor, an activated carbon adsorption tank, a gas storage tank and a first control pipeline, an inlet of the activated carbon adsorption tank is communicated with an outlet of the gas storage tank, an outlet of the activated carbon adsorption tank is communicated with an inlet of the air compressor through the first control pipeline, and an outlet of the air compressor is communicated with an inlet of the nitrogen making machine; and the first control pipeline at least can be switched between a connected state and a disconnected state. When the tail gas discharged by the hydrogen peroxide production system is used as the nitrogen-making raw material gas, only trace trimethylbenzene and other impurities need to be removed at the inlet of the air compressor, and then the tail gas is compressed and enters the nitrogen making machine, so that the device has the advantages of less pollution, low energy consumption, carbon and emission reduction and low cost.

The invention relates to the technical field of mesitylene production, in particular to a catalyst for producing mesitylene from C9 aromatic hydrocarbon and a preparation method of the catalyst. A silicon-aluminum molecular sieve is subjected to ammonium exchange treatment, and the molecular sieve is filtered and dried; grinding the dried molecular sieve, uniformly mixing the ground molecular sieve with a required amount of binder, adding a required amount of acid, mixing, kneading, carrying out extrusion molding, and drying to obtain a catalyst precursor; roasting the catalyst precursor; impregnating the roasted catalyst precursor with a salt solution of a non-noble metal element, and drying after impregnation to obtain a catalyst intermediate; and roasting the catalyst intermediate to obtain the catalyst for producing mesitylene from C9 aromatic hydrocarbon. The molecular sieve is modified by loading the non-noble metal element, so that the production cost of the catalyst can be reduced, the mesitylene selectivity, the mesitylene yield, the methyl-ethylbenzene conversion rate and the trimethylbenzene yield are improved, and the comprehensive performance of the catalyst and the utilization value of C9 aromatic hydrocarbon are remarkably improved.