30 results about "M-Xylene" patented technology

The invention discloses a covalent organic framework material for directly capturing carbon dioxide in air and coupling solar photo-thermal rapid desorption and a preparation method of the covalent organic framework material, and belongs to the field of materials. According to the material, piperazine with secondary amine sites and dialdehyde derivatives are used as raw materials, dioxane and mesitylene, m-xylene and mesitylene or o-xylene and mesitylene are used as solvents, and solvothermal reaction is performed; and after the reaction is finished, sequentially carrying out suction filtration and washing by using DMF and THF, carrying out Soxhlet extraction for 24 hours, and then carrying out vacuum drying to obtain the covalent organic framework. The aldehyde and the secondary amine are condensed according to the proportion of 1: 2, and the secondary amine site of the raw material piperazine is converted into the tertiary amine site in the covalent organic framework through aminal reaction. Tertiary amine nitrogen atoms can specifically recognize carbon dioxide in air and perform chemical adsorption, and firm covalent bonds can ensure the stability of a covalent organic framework, so that efficient air carbon dioxide capture is realized. In addition, ionic bonds formed by the covalent organic framework and carbon dioxide are also beneficial to coupling solar photo-thermal low-energy-consumption desorption.

The invention provides a synthesis method of 1, 5-dibromo-3-fluoro-2, 4-xylene, and belongs to the field of synthesis of fine chemical intermediates. According to the method, 2-fluorine-m-xylene is taken as a starting raw material, and 1, 5-dibromo-3-fluoro-2, 4-xylene is obtained through two steps of bromination and reduction. According to the synthesis method, the problem that accurate bromination positioning cannot be realized is solved by optimizing reaction raw materials and operation steps, so that the purity and yield of the product are greatly improved. The synthesis method is simple and stable, and has great industrial production value.

The present invention aims to provide a carbon dioxide absorbent that can efficiently absorb, fix, and simply separate and recover carbon dioxide in the air. The present invention relates to an atmospheric carbon dioxide absorbent consisting of an amine selected from the group consisting of m-xylylene diamine, benzylamine, phenethylamine, p-methoxybenzylamine, and p-trifluoromethylbenzylamine, and water, and having the amine content of 1 to 50 wt % with respect to the total amount. The present invention also relates to a method for generating carbon dioxide which uses the aforementioned carbon dioxide absorbent and is simple and superior in energy efficiency.

The invention discloses skin mucosa maintenance liquid capable of killing fungi and HPV (human papillomavirus) as well as a preparation method and application of the skin mucosa maintenance liquid, and belongs to the technical field of sterilization and virus removal. The skin mucosa maintenance liquid is prepared from octanol ether, benzalkonium bromide, phenoxyethanol, yermate, parachlorometaxylenol, taetinic acid, chitosan, keratinase, fluconazole, glycerol, borneol, menthol, absolute ethyl alcohol and tween-40. Wherein the skin mucosa maintenance liquid has an effect of regulating apoptosis induction on abnormal cells and an effect on vaginal flora, and has an obvious inhibition effect on cervicitis and colpitis mycotica, namely an anti-inflammatory effect; meanwhile, apoptosis of cells containing HPV16 and HPV18 genes can be induced, shedding of abnormal cells is promoted, diseased cells are killed, and vaginal tissues with pathological changes are removed.

The application discloses a kind of fast screening method of solvent residual quantity in food contact packaging material, sample is sent into gas chromatograph by headspace sampler and separates out the gas to be measured, and the gas to be measured is detected using hydrogen flame ion detector, and the chromatogram of sample is obtained;Add mixed standard intermediate liquid of known content in blank matrix to obtain the standard reference sample of the limited concentration to be measured, and the peak area of methyl acetate, benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene is measured respectively;By comparing the sum of the peak area of all detected substances in sample chromatogram with the chromatographic peak area of methyl acetate in standard reference sample, judge whether the total amount of residual solvent meets the limit requirement, and by comparing the peak area of benzene, toluene, ethylbenzene, o-xylene, m-xylene, p-xylene in sample with the peak area of corresponding substance in standard reference sample, judge whether each benzene solvent meets the limit requirement.

This invention relates to the field of catalyst technology, specifically to a catalyst for the ammoxidation of m-xylene to isophthalonitrile and its preparation method. It includes a support and an active ingredient, wherein the active ingredient has the general structural formula: V 1.0 Cr a X b Y c Z d O e Wherein: X is selected from at least one of B, P, As and Se; Y is selected from at least one of Group VIII transition metals; Z is selected from at least one alkaline earth metal. The catalyst prepared by the present invention is used for the ammoxidation of m-xylene to prepare isophthalonitrile, thereby improving the selectivity and yield of isophthalonitrile.

This invention belongs to the field of water treatment technology, specifically relating to a composite flocculant for water treatment and its preparation method. Under an argon atmosphere, tetrazolium acetic acid, amphoteric polyacrylamide, pyridine borane complex, and m-xylene are mixed and reacted at 140°C for 12-48 hours to obtain tetrazolium acetic acid-modified amphoteric polyacrylamide. The tetrazolium acetic acid-modified amphoteric polyacrylamide is added to a 2-morpholine ethanesulfonic acid buffer solution, cooled to 4°C in an ice bath, and then 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride and N-hydroxysuccinimide are added sequentially. The mixture is stirred and activated under a nitrogen atmosphere for 30 minutes, and then a chelate solution is added to obtain the composite flocculant. The flocs formed during the flocculation process of this invention exhibit higher stability under the shearing action of water, are less prone to breakage, and provide better flocculation and ease of use.

The application discloses a kind of twin ZSM-5 molecular sieve and synthesis method thereof, belong to inorganic chemistry technical field.The twin ZSM-5 molecular sieve is covered by the (010) crystal surface of one coffin-shaped ZSM-5 to the (100) crystal surface of another coffin-shaped ZSM-5, so that the molecular sieve surface has higher straight channel exposure ratio.Preparation process includes: (i) water, sodium hydroxide, aluminum source, template agent, silicon source are mixed and stirred to obtain synthesis gel A;(ii) three kinds of molecular sieves MCM-35, MOR, MCM-22 are added to alkaline environment according to the ratio of 1:2:4, and alkaline heat treatment is carried out to obtain mixture B containing "mfi, mor, mel" three kinds of structural units;(iii) A, B are mixed according to the water content of 1:1, and ZSM-5 molecular sieve product is obtained by hydrothermal crystallization.For the "primary aromatic hydrocarbon mixture" obtained after benzene, toluene, p-xylene are separated from the aromatic hydrocarbon mixture obtained by petroleum and non-petroleum route, twin ZSM-5 molecular sieve shows enhanced selectivity to o-xylene and m-xylene due to higher "straight channel exposure ratio" on the surface.

The present application relates to a kind of preparation method of isophthalic acid, belong to organic synthesis and fine chemical technology field.The method uses m-xylene as raw material, air as oxidant, under the condition of no additional solvent, using the catalyst containing cobalt, manganese, chromium compound carries out catalytic oxidation reaction.After reaction, it is obtained isophthalic acid by cooling, filtering, washing and drying.The present application uses halogen-free cobalt-manganese-chromium catalyst system and cancels solvent, fundamentally solves the problem of serious corrosion of traditional process equipment, large pollution of acid-containing wastewater containing bromine, while having the advantages of mild condition, simple process, high atom economy and material closed loop can be realized, provides a cleaner, safer, more economical isophthalic acid production path.

A feed mixture comprising one or more xylene isomers and C9+ aromatic hydrocarbons may be separated in a first distillation column to obtain a first overhead stream comprising m-xylene and / or p-xylene and a first bottoms stream comprising o-xylene and C9+ aromatic hydrocarbons. The first bottoms stream may be optionally isomerized through liquid-phase isomerization and fed to a second distillation column to obtain a second overhead stream comprising at least o-xylene and a second bottoms stream comprising C9+ aromatic hydrocarbons. The second overhead stream may be optionally isomerized through liquid-phase isomerization. Liquid-phase isomerization may occur upon at least one of the first bottoms stream, the second overhead stream, an optional side stream obtained from the first or second distillation columns, or within the first or second distillation columns, such that the second overhead stream or an isomerized second overhead stream is rich in p-xylene.

The application discloses a kind of photocatalytic self-cleaning detergent and preparation method thereof, by weight parts, including the following components: TiO2-zeolite complex 5-10 parts;Para-chloro-m-xylene phenol 2-3 parts;Sodium citrate 5-8 parts;Sodium silicate 3-5 parts;Polyvinylpyrrolidone 1-2 parts;Surfactant 20-30 parts;Enzyme preparation 0.2-1 part;pH regulator 2-3 parts;Water 50-70 parts.The photocatalytic self-cleaning detergent of the application promotes the absorption of ultraviolet light by PCMX, thereby exciting TiO2-zeolite complex to generate strong oxidative active oxygen, improving the degradation efficiency of the detergent on stubborn organic stains, solving the problem of poor dispersibility of TiO2 in the detergent and limited photoactivation, realizing the stable release of photocatalytic materials in the washing process, ensuring sustained and efficient cleaning effect, and can be applied to hospitals or industrial and other scenes requiring a large amount of deep cleaning.

The application provides adamantane-modified fullerenes (C 60 ) pyrrolines with enhanced fluorescent properties. The application discloses adamantane-modified fullerenes pyrrolines with enhanced fluorescent properties, and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing and dispersing fullerenes, paraformaldehyde, 1-adamantane methylamine and o-dichlorobenzene, reacting, evaporating a solvent under reduced pressure, separating by column chromatography, and recrystallizing to obtain adamantane-modified fullerenes pyrrolines. The adamantane-modified fullerenes pyrrolines are dissolved in m-xylene, and a poor solvent, isopropanol, is slowly added dropwise to form a clear liquid-liquid interface. The reaction liquid is shaken until the liquid-liquid interface disappears, and then is subjected to ultrasonic treatment, standing, precipitation, washing, and drying to obtain microcrystals. The synthesis process is simple, and raw materials are cheap and easy to obtain. The crystallization method is simple and effective, and the crystallization is good, so that the crystal morphology and size can be controlled. The obtained adamantane-modified fullerenes pyrrolines and cubic crystals have good solubility in organic solvents, excellent fluorescent properties, and symmetrical structure, which is beneficial to subsequent application.

The invention provides a method for determining the content of a target component in coking crude benzene. The method for determining the content of the target component in the coking crude benzene comprises the following steps: mixing a coking crude benzene sample with internal standard substances 1, 4-dioxane and n-nonane, and injecting the mixture into a chromatographic instrument by adopting a capillary chromatographic column and taking methanol as a mobile phase to obtain a chromatogram and peak areas of all substances; calculating to obtain the content of the target component; the target components comprise benzene, toluene, ethylbenzene and xylene; wherein the xylene comprises p-xylene, m-xylene and o-xylene; the capillary chromatographic column comprises any one of a cross-linked and bonded polyethylene glycol quartz elastic capillary chromatographic column, a DB-1 chromatographic column and an HP-5 chromatographic column. According to the method disclosed by the invention, the component detection in the coking crude benzol is more accurate, the refining processing technology develops towards a more large-scale and multi-product deep processing direction, a higher additional value is generated, and the high-quality development of the industry is promoted.

A blow-molded bottle for a carbonated beverage includes a threaded mouth, a cylindrical side wall, a bottom, and a standard fill capacity of 37.5 mL to 105 mL. The bottle is blow-molded from a laminated preform including an outer layer formed from polyethylene terephthalate, an intermediate gas barrier layer formed from a polyamide comprising a dicarboxylic acid component and a diamine component comprising m-xylylenediamine, and an inner layer comprising polyethylene terephthalate. The laminated preform may weigh from about 4 to 16 grams. The polyamide layer provides the bottle with excellent resistance to carbon dioxide, hydrogen, and nitrogen transmission and prevents the degradation of nutrients and flavors.

The invention discloses a method for high-selectivity synthesis of a triazine ultraviolet light absorber, which comprises the following steps: step 1, primary Friedel-Crafts reaction: carrying out primary Friedel-Crafts reaction on cyanuric chloride and resorcinol under the action of a catalyst in a carbon dioxide gas atmosphere; step 2, secondary Friedel-Crafts reaction: supplementing the catalyst into a reaction product, and directly carrying out secondary Friedel-Crafts reaction on the reaction product and biphenyl or m-xylene to obtain a disubstituted triazine intermediate; step 3, etherification reaction: in a carbon dioxide atmosphere, carrying out etherification reaction on the disubstituted triazine intermediate and halogenated alkane under an alkaline condition; step 4, purification and separation: purifying and separating a product by adopting a combined type immobilized catalyst; and 5, recrystallization: recrystallizing the mixed solvent separated in the step 4 to obtain the high-purity triazine ultraviolet light absorber. Through the synergistic effect of technologies such as step-by-step substitution, one-pot continuous reaction, carbon dioxide atmosphere regulation and control and combined type immobilized catalyst purification, the product is purified by adopting a combined type immobilized catalyst in a filtering manner.

The invention belongs to the field of catalysts, and particularly relates to a method for recovering fullerene from a fullerene-containing supported catalyst, which comprises the following steps: carrying out reflux extraction or Soxhlet extraction on the fullerene-containing supported catalyst by using an organic solvent, carrying out solid-liquid separation on the obtained extract, and collecting a liquid-phase substance; wherein the organic solvent comprises one or more of toluene, carbon disulfide, p-xylene, m-xylene and o-xylene, the active component of the supported catalyst comprises one or more of IB group metal and VIII group metal, and the carrier of the supported catalyst comprises at least one oxide; and concentrating and drying the liquid phase substance to obtain the recovered fullerene. The invention also relates to the recovered fullerene. According to the method, the recovery rate of the fullerene is high, and the purity of the recovered fullerene is high.

The application discloses a polymer composite adsorbent, a synthesis method and a method for separating dimethylbenzene isomers. According to the difference in molecular structures of dimethylbenzene isomers, a 1-amino pyrene polymer composite adsorbent material is designed and synthesized, dimethylbenzene isomers are dispersed by using water as a medium, and the dimethylbenzene isomers are separated through multi-stage adsorption-desorption by using the difference in acting force between the dimethylbenzene isomers and polymer units. By using the method, OX with a purity higher than 99.0% (gas chromatography analysis) can be obtained when the separation ratio of PX / intermediate dimethylbenzene (MX) / ortho-xylene (OX) is 1 / 1 / 1, and MX with a purity higher than 98.5% (gas chromatography analysis) can be obtained when the separation ratio of PX / MX is 1 / 1, and the method has the advantages of low energy consumption.

An m-xylene adsorbent comprising 94 to 99.9 mass % Y molecular sieve and 0.1 to 6 mass % substrate, the Y molecular sieve consisting of an amorphous transition Y molecular sieve and a Y molecular sieve produced by crystal transformation, the amorphous transition Y molecular sieve being a mesoporous nano-Y molecular sieve having a crystal size of 20 to 450 nanometers, and two types of mesoporous pores having most likely pore diameters of 5 to 20 nanometers and 25 to 50 nanometers, respectively. The adsorbent is used for the adsorptive separation of m-xylene from mixed C8 aromatic hydrocarbons, and has good mass transfer performance, relatively high m-xylene adsorption selectivity and adsorption capacity.

The invention provides a reaction liquid, a method and a device for preparing m-toluic acid from m-xylene, and belongs to the field of fine chemical engineering. The reaction liquid for preparing the m-toluic acid is prepared from the following components in parts by weight: 100 parts of mixture containing m-xylene, 0.015 to 0.08 part of organic transition metal salt, 0.03 to 0.1 part of organic bromide ligand and 50 to 70 parts of reaction solvent. According to the method, a mixture containing m-xylene is taken as a raw material, a homogeneous metal catalyst compounded by organic transition metal salt and organic bromide ligand is taken as a catalyst system, and liquid-phase oxygen selective oxidation is carried out to prepare m-toluic acid; a micro-nano bubble reactor is adopted. The method has the advantages of short reaction time, high selectivity of m-toluic acid, low energy consumption, high synthesis efficiency, environmental protection and the like.

The invention relates to an ammoxidation catalyst and a preparation method and application thereof, the ammoxidation catalyst comprises a carrier and active components, the carrier is silicon dioxide (SiO2), the active components comprise boron and chromium elements, and the boron element exists in the ammoxidation catalyst in the form of chromium boride. The catalyst belongs to a V-Cr system catalyst, loss of a boron element is reduced through chromium boride, deep oxidation of the catalyst caused by the loss of the boron element is prevented from being increased, the CO2 selectivity is prevented from being increased, the nitrile product selectivity is prevented from being reduced, the yield of the nitrile product under long-period operation is guaranteed, and the mechanical strength of the catalyst is improved. According to the present invention, the catalyst is used as the catalyst, and the cometallic element and the stoichiometric ratio are limited, such that the ammonia conversion rate in the ammoxidation reaction can be effectively improved, the selectivity of the catalyst on nitrile products is improved, and the catalyst is suitable for large-scale ammoxidation industrial production application, and is especially suitable for m-xylene ammoxidation preparation of isophthalonitrile.

This invention discloses a method for preparing a catalyst for the production of isophthalonitrile from m-xylene and its application. The catalyst comprises an active component containing manganese, cobalt, copper, and optionally at least one selected from sodium, potassium, magnesium, and calcium; optionally at least one selected from iron, nickel, zinc, aluminum, and lead; and optionally at least one selected from boron, phosphorus, and sulfur. In the presence of the catalyst, isophthalonitrile is obtained by one-step ammoxidation of m-xylene as a raw material in an atmosphere of air and ammonia. The catalyst used in this invention has the advantages of low cost, good thermal conductivity, strong water resistance, strong cycle stability, high reactivity, ability to reduce reaction temperature, inhibition of deep oxidation, and improved reaction selectivity.

The invention belongs to the technical field of deep processing of coal tar, and particularly relates to a method for separating carbazole from coal tar, which adopts an o-xylene-m-xylene composite solvent system, adopts a gradient crystallization method in the crystallization process, and can obviously improve the yield of carbazole. Experiments show that by adopting the method for separating carbazole from coal tar, the yield of carbazole can reach 60% or above, especially when the volume ratio of o-xylene to m-xylene is 1: 2, the yield of carbazole is the highest and is 63.28%, the yield is averagely improved by 8.25% and the average improvement rate is 15.00% compared with a single xylene solvent in a contrast ratio.

The utility model relates to the field of filling machines, and discloses an anti-interference automatic filling machine device for pentachloro-m-xylene production, which comprises a filling rack, an anti-interference filling mechanism, an anti-interference filling mechanism, an anti-interference filling mechanism, an anti-interference filling mechanism and an anti-interference filling mechanism, the anti-interference filling mechanism comprises a hydraulic cylinder, a push disc, a rotary disc, a butt joint disc, a first butt joint rod, a power motor, a driving disc, a connecting rod, a lantern ring and a second butt joint rod. A hydraulic rod of the hydraulic cylinder is fixedly connected with the push disc, the rotary disc is rotationally installed on the push disc, the first butt joint rod is fixedly installed on the rotary disc, the butt joint disc and the first butt joint rod are clamped, the power motor is fixedly installed on the filling rack, and the output end of the power motor is fixedly connected with the driving disc. And the connecting rod is fixedly connected with the driving disc and the lantern ring. The filling device has the following advantages and effects that a plurality of containing bottles can be filled in sequence through the filling head, when vibration occurs outside, scattering is not prone to occurring, the anti-interference performance is good, and the filling effect is guaranteed.

The application provides a carbon nanotube array modified graphene fiber and a preparation method and application thereof, and belongs to the technical field of solid phase microextraction. The carbon nanotube array modified graphene fiber is prepared through an ionic liquid assisted wet spinning method, directional growth of a metal organic framework and pyrolysis. The carbon nanotube array modified graphene fiber has a stem structure, and ordered carbon nanotube arrays grow on the surface of the stem, is a graphene solid phase microextraction material based on a metal organic framework derived carbon nanotube array modification, and has high enrichment capacity for benzene series (including benzene, toluene, ethylbenzene, p-xylene and m-xylene). The carbon nanotube array modified graphene fiber has a detection linear range of 0.2-600 mu g / L, a minimum detection limit of 0.005-0.03 mg / L, and the like, and has the characteristics of high stability and strong extraction capacity.

The utility model relates to a practical training device for a hazardous chemical amination process, which comprises an m-xylene vaporizer, an ammonia buffer tank, a liquid ammonia vaporizer, a mixed feed preheater, an air heater, an air blower, an electric heater, a fluidized bed reactor, a hot water pump, a steam pocket, an oil cooler and a material trap, and the ammonia buffer tank is connected with the liquid ammonia vaporizer through a pipeline. The practical training device embodies a pipeline connection structure of an m-xylene vaporizer, an ammonia buffer tank, a liquid ammonia vaporizer, a mixed feeding preheater, an air heater, an air blower, an electric heater, a fluidized bed reactor, a hot water pump and the like, and embodies an amination reaction process and a substance circulation process after the reaction.

The present application relates to a kind of ammonia oxidation catalyst and its preparation method and m-xylene gas phase ammonia oxidation coproduction m-methylbenzonitrile and m-phenyldicyanide method.The catalyst includes carrier and active component, active component element includes: vanadium, bismuth and boron, the active component includes BiVO4 Crystal, and the ratio of the intensity of main diffraction characteristic peak attributed to V2O5 And / or Bi2O3 With the intensity of main diffraction characteristic peak attributed to BiVO4 In the XRD spectrum of the catalyst, it is 0-0.15:1.The catalyst has the characteristics of being able to realize the coproduction of m-alkylbenzonitrile and m-phenylalkylnitrile, and high activity and high selectivity.

The application provides an aromatic hydrocarbon ammoxidation catalyst and a preparation method and application thereof. The method is as follows: vanadium, chromium and an auxiliary component A are mixed, an organic acid is added, stirring is performed to obtain a solution, a carrier silica sol is added to form slurry 1; an auxiliary component B and an auxiliary component C are dissolved in water, stirring is performed to obtain a solution, a carrier silica sol is added, hydrothermal treatment is performed, slurry 2 is formed; the slurry 1 and the slurry 2 are mixed, heating and evaporation are performed until concentrated slurry is formed; spray drying and high-temperature calcination are performed to prepare a target catalyst. The method solves the problems of low catalyst strength, low reaction activity and poor product yield of the catalyst produced in the prior art when used for ammoxidation reaction, and can be used for industrial production of a catalyst for preparing m-toluic nitrile by ammoxidation of m-xylene.

The invention relates to an orius saxicola attractant and a preparation method and application thereof, and belongs to the technical field of biological attractants, and the orius saxicola attractant comprises sabinene, m-xylene and nonane; the volume ratio of sabinene to m-xylene to nonane is (2-4): (3-4): (3-4); meanwhile, a diluent can be added, and the volume ratio of the mixed solution of sabinene, m-xylene and nonane to the diluent is 1: (5-11). Through a core active system of sabinene, m-xylene and nonane, the problems that the farmland space is occupied and the effect is unstable due to the fact that an existing attraction mode depends on planting of functional plants, the specificity of a universal attractant is poor due to complex components, ecological balance is possibly interfered, and the cost is low are solved. And the problems of poor product effect consistency and difficulty in large-scale application caused by undefined core components and proportions in the prior art are solved.

The invention relates to the field of metallic paint, and discloses metallic paint for wooden home furnishing surfaces and a preparation method of the metallic paint, the metallic paint comprises the following components in parts by weight: water-based acrylic emulsion, modified nano titanium dioxide, modified aluminum powder, auxiliaries and the like; the modified nano titanium dioxide is prepared by grafting a modified silane coupling agent onto the surface of nano titanium dioxide, wherein the modified silane coupling agent is prepared by reacting a modified s-triazine derivative with 3-aminopropyltriethoxysilane; the modified s-triazine derivative is prepared by the following steps: sequentially reacting phenyl phosphorus dichloride with m-xylene and resorcinol to generate a dihydroxy phosphorus-containing intermediate, then condensing the dihydroxy phosphorus-containing intermediate with epoxy chloropropane, substituting the condensed dihydroxy phosphorus-containing intermediate with cyanuric chloride, and carrying out ring-opening reaction on the obtained s-triazine derivative and dodecanol. The modified aluminum powder is prepared by using an aminated silane coupling agent to modify aluminum powder and then growing copper oxide on the surface of the aluminum powder by adopting an in-situ growth method. The paint film prepared by the invention has excellent water resistance, flame retardance, antibacterial activity and light aging resistance.

The invention discloses a ZIF-67 wood composite material for selectively adsorbing benzene series and a preparation method and application thereof, and belongs to the technical field of functional composite materials. According to the composite material, natural wood subjected to alkali pretreatment serves as a three-dimensional carrier, and ZIF-67 nanoparticles formed by coordination of cobalt ions and 2-methylimidazole according to the molar ratio of 1: 4-1: 8 are loaded in pore channels of the natural wood through a step-by-step impregnation in-situ growth method. By regulating and controlling the molar ratio, directional optimization of the adsorption performance of the material is realized, and the comprehensive performance is optimal when the ratio is 1: 6. According to the composite material, the efficient adsorbability of ZIF-67 and the macrostructure of wood are successfully integrated, and the engineering application problem of MOF powder is solved. The core advantage is that the material has excellent selective separation capability on mixed steam of benzene, toluene and xylene, and a dynamic penetration experiment shows that the adsorption affinity sequence is benzene gt; m-xylene gt; according to the present invention, the high-efficiency adsorption of benzene can be achieved, such that the toluene can preferentially and efficiently adsorb the strong cancerogen benzene, and has wide application prospects in the indoor air purification, especially the treatment of volatile organic compounds (VOCs) released by wood furniture.