103 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 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 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 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 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 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.

The application relates to the technical field of catalyst materials, in particular to a preparation method and application of a catalyst for synthesizing dimethyl carbonate from carbon dioxide and methanol; the method comprises the following steps: A, poloxamer is configured into a solution, HAc, NaClO4 and 1,3,5-trimethylbenzene are added into the solution and uniformly mixed to obtain a mixture; B, (NH4)2Ce(NO3)6 and H2BDC are added into the mixed solution in step A, the obtained solid after reaction is centrifugally separated, washed, soaked and dried to obtain a primary product, and finally the catalyst is obtained through calcination; in the application, HF-UiO-66 is synthesized by taking F127 as a template agent and taking 1,3,5-trimethylbenzene (TMB) as an expanding agent; the derivative HF-CeO2 catalyst with different TMB adding amounts is prepared through calcination; the adding of the expanding agent greatly increases the specific surface area of the catalyst, the CeO2 crystal grains generated through calcination are small, the number of acid-base sites is greatly increased, and therefore the catalyst has the largest catalytic activity, and the DMC yield reaches 12.02 mmol DMC / g cat .

The invention discloses an aromatic hydrocarbon alkylation catalyst as well as a preparation method and application thereof. The catalyst comprises: 10 to 90 parts of a ZSM-5 molecular sieve; 0.05-10 parts of at least one selected from Co, Mo and La in terms of metal oxide; and 20-60 parts of a binder component. In an XRD diagram of the ZSM-5 molecular sieve, characteristic diffraction peaks of crystal faces (101), (200), (501) and (303) are broadened, and the aspect ratios of the broadened diffraction peaks are independently selected from 2-7. When the catalyst is used in a reaction for preparing C8 aromatic hydrocarbon, unsym-trimethylbenzene can be co-produced, and meanwhile, the content of m-xylene in xylene and the content of ethylbenzene in the C8 aromatic hydrocarbon are reduced, so that the quality of the product C8 aromatic hydrocarbon is improved.

The invention relates to the technical field of catalyst preparation, in particular to a catalyst for producing mesitylene from C9 mixed aromatics and a preparation method thereof.The catalyst is a non-noble metal loaded molecular sieve catalyst, a catalyst carrier comprises, by weight, 70%-90% of molecular sieves and 20%-30% of binders, the loading amount of each element accounts for 1 wt% to 10 wt% of the weight of the catalyst carrier, and the loading amount of the total element accounts for 5 wt% to 15 wt% of the weight of the catalyst carrier. The catalyst for producing mesitylene from C9 mixed aromatic hydrocarbon has good catalytic performance, is applied to a process for producing mesitylene from C9 mixed aromatic hydrocarbon as a catalyst for alkylation reaction and isomerization reaction, finally eliminates interference of methyl-ethylbenzene, can produce mesitylene to the maximum extent, and has a methyl-ethylbenzene content of less than 0.5% and a mesitylene yield of more than 25%.

The invention relates to a device and a process method for producing trimellitic anhydride by continuous liquid-phase oxidation of unsym-trimethylbenzene. The device comprises an oxidation reaction tower, a DTB crystallizer, a horizontal screw centrifuge, an anhydride forming tower and a rectifying tower which are connected in sequence, the oxidation reaction tower is provided with N feed ports and N gas inlets, wherein N is greater than or equal to 3; 2N distributors are arranged in the cavity of the oxidation reaction tower; and the distributor is respectively connected with the feeding hole and the air inlet. The whole technological process is simple, the equipment investment is low, the automation degree is high, the product yield is high, the quality is good, the overall energy utilization efficiency is high, and part of problems existing in an intermittent process are solved.

The invention belongs to the field of paint, and particularly relates to PU electrostatic spraying high-wear-resistance white matt finish paint and a preparation method thereof.The PU electrostatic spraying high-wear-resistance white matt finish paint is prepared from a component A, a component B and a component C. The component A is prepared from odorless matting resin, a wetting agent, a defoaming agent, matting powder, superfine ceramic powder, an organic silicon flatting agent, an anti-settling agent, conductive titanium dioxide slurry and xylene; the component B comprises a bright tripolymer, a matte tripolymer, an HDI (hexamethylene diisocyanate) tripolymer and butyl acetate; the component C comprises trimethylbenzene, cyclohexanone, a DBE high-boiling-point solvent, butyl acetate and an alcoholic solution of an amine salt compound; the conductive titanium dioxide slurry comprises odor-free matting resin, conductive titanium dioxide, a wetting agent and xylene. By means of the superfine ceramic powder, excellent hardness, wear resistance and certain whiteness can be provided for the coating, and the chemical stability of the coating is improved. The conductive titanium dioxide slurry can achieve the electrostatic surrounding effect, and multiple surfaces of a workpiece can be evenly oiled at the same time during electrostatic spraying.

The utility model discloses a waste gas trimethylbenzene detection device which comprises a device main body, and a detection mechanism is mounted at the upper end of the device main body; and the breaking contact prevention mechanism is arranged at the upper end of the device body and used for limiting the pipe fitting, an anti-skid pad is arranged in the breaking contact prevention mechanism, a storage assembly is installed at one end of the device body, and a hook rod is inserted into the storage assembly. According to the waste gas trimethylbenzene detection device, the broken touch prevention mechanism is mounted at the upper end of the device main body, so that the effects of conveniently supporting and rapidly limiting a gas conveying pipeline and conveniently and rapidly storing the gas conveying pipeline are achieved.

The invention discloses a method for decolorizing a bisphenol S crude product without using activated carbon, which comprises the following steps: mixing phenol and mesitylene, heating, adding concentrated sulfuric acid, heating, refluxing and separating water; filtering to obtain a bisphenol S crude product; the method comprises the following steps: dissolving a bisphenol S crude product in a mixed solution of alcohol and water, adding sodium sulfite, and heating and refluxing; and filtering while hot, evaporating the filtrate, and filtering to obtain bisphenol S solid. According to the method, a catalyst does not need to be added, a traditional activated carbon adsorption process is replaced by sodium sulfite pigment reduction, the problems that a bisphenol S product is unstable in chromaticity and prone to pink are effectively solved, and the product quality is remarkably improved. According to the method, the crude product is decolorized without using expensive wooden activated carbon, so that the production cost is reduced, no activated carbon solid waste is generated, the solid waste treatment cost of an enterprise is reduced, and the economic benefit of the enterprise is greatly improved.