65 results about "Chlorophenol" patented technology

The invention discloses an application of an electronic waste pollution human body exposure fingerprint spectrum in exposure risk prediction, and the human body exposure fingerprint spectrum is composed of more than three of exposure markers of 2, 4, 6-tribromophenol, 2, 4, 5-trichlorophenol, 4-bromophenol, 1-hydroxypyrene and bisphenol A. The invention further discloses an application of the electronic waste pollution human body exposure fingerprint spectrum in exposure risk prediction. According to the method, a systematic method of urine pollutant exposure omics is adopted for the first time, comprehensive screening and characterization of pollutant exposure markers related to specific components and by-products are achieved in electronic waste exposure worker groups, and the method is the most systematic organic pollutant exposure research known in the field at present.

The application discloses a kind of molecular imprinting cerium oxide / biochar composite material and its preparation method and application, comprising: cerium oxide / biochar composite material and solvent are mixed, ultrasonic, obtain first solution;At room temperature, first solution and imprinting polymer are mixed, stirring, obtain first mixture, imprinting polymer is the mixture of template molecule and functional monomer, template molecule is p-chlorophenol, and functional monomer is methyl methacrylic acid;First mixture is purged with N2, under sealed, ultraviolet light radiation polymerization 12-24h, obtain second mixture, second mixture is centrifuged, washes to detect no template molecule, clean, dry, obtain molecular imprinting cerium oxide / biochar composite material.Molecular imprinting cerium oxide / biochar composite material as catalyst in the application of photocatalytic removal of p-chlorophenol in water body shows higher specific selectivity and catalytic activity, and the removal efficiency of p-chlorophenol reaches 90%, with good anti-interference in complex water environment.

The invention relates to a preparation method of a trace Fe optimized Ru nano-catalyst and application of the trace Fe optimized Ru nano-catalyst in hydrodechlorination reaction of parachlorophenol. The preparation method comprises the following specific steps: firstly, dissolving ruthenium chloride hydrate and ferric trichloride into ethylene glycol, adding PVP (Polyvinyl Pyrrolidone) into the solution, fully mixing, adjusting the pH value of the solution to 3-4, transferring into a glass bottle, and heating and reacting in an oil bath pan at 180 DEG C; and centrifuging, washing and drying the obtained product to obtain a black powdery solid, namely the Ru-Fe nano-catalyst. The hydrodechlorination process is carried out in a double-chamber electrolytic tank separated by a Nafion 117 membrane, an electrolyte is a Na2SO4 solution, a Ru-Fe electrode taking carbon cloth as a carrier is used as a working electrode, a Pt sheet is used as a counter electrode, and an Ag / AgCl electrode is used as a reference electrode. The Ru-Fe nano-catalyst provided by the invention has the advantages of stable structure, uniform metal distribution and excellent electron synergistic effect, and can efficiently catalyze hydrodechlorination of p-chlorophenol and generate cyclohexanol. The preparation process is simple, convenient and environment-friendly, has a good industrial application prospect, and is particularly suitable for green treatment and resource conversion of chlorine-containing organic wastewater.

The present application relates to a kind of high efficiency energy-saving preparation process of phloroglucinol.The preparation process uses phenol as raw material, generates 2,6-dichlorophenol and dichlorophenol isomer through chlorination reaction, then is alkaline hydrolysis and acidification into product phloroglucinol, after the intermediate dichlorophenol is generated in the chlorination reaction of raw material phenol, it is not concentrated and separated, directly add base to carry out alkaline hydrolysis reaction, realize chlorination-alkaline hydrolysis two-step reaction continuous production.The present application uses alkaline hydrolysis reaction to also convert the original dichlorophenol isomer impurity in situ into product phloroglucinol, realizes waste to treasure, improves yield about 8-10%;In the preparation process, 2,6-dichlorophenol intermediate is not separated, it is directly used in the next step alkaline hydrolysis reaction, the operation unit such as the solvent, crystallization, centrifugation, drying, packaging etc. for its concentration replacement is saved, at the same time, the pungent odor generated in the large production process of 2,6-dichlorophenol is fundamentally avoided, and the environmental pollution problem in the production process of phloroglucinol is avoided.

The application discloses a kind of iron monatomic catalysts with controllable sulfur content and coordination mode and its preparation method and application, nitrogen-allyl thiourea and thiocyanic acid are respectively used as sulfur-containing organic ligand and sulfur-containing supramolecular precursor, chelate with iron ion, and use the hydrogen bond interaction between melamine and cyanuric acid, complete supramolecular self-assembly process;And high-temperature pyrolysis is carried out under argon atmosphere, and iron monatomic catalysts with controllable sulfur content and coordination mode can be prepared.The application also includes the application of iron monatomic catalysts with controllable sulfur content and coordination mode in removing organic pollutants such as p-chlorophenol and antibiotics in water.Iron monatomic catalysts with controllable sulfur content and coordination mode can improve the activation efficiency of persulfate, the content and selectivity of active oxygen species generated, and achieve efficient degradation of p-chlorophenol under different anion-cation, humic acid and pH conditions, while having good recycling performance.

The invention discloses a method for reducing chlorophenol by coupling micron-sized zero-valent iron with dechlorination microorganisms, which is characterized in that micron-sized zero-valent iron is added into a system for reducing chlorophenol by dechlorination microorganisms to synergistically degrade chlorophenol compounds, and the particle size of the micron-sized zero-valent iron is greater than or equal to 1 mu m. According to the method disclosed by the invention, by constructing the reduction system of the micron-sized zero-valent iron coupled dechlorination microorganisms, the chlorophenol compounds can be efficiently reduced by utilizing the synergistic promotion effect of the micron-sized zero-valent iron coupled dechlorination microorganisms, so that not only can the efficient removal of polychlorophenols be realized, but also the proportion of low-toxicity products in the reduction system can be remarkably increased; the method has the advantages of simple process, convenience in operation, low cost, high treatment efficiency, high proportion of low-toxicity chlorophenol in a reduction product, environmental friendliness and the like, is suitable for degrading chlorophenol compounds in wastewater, and has high use value, good application prospect and wide application prospect. The method is of great significance in effectively reducing the overall toxicity of the chlorophenol pollutants and effectively reducing the harm of the chlorophenol pollutants to the environment and human beings.

This invention discloses the application of human exposure fingerprinting of electronic waste pollution in exposure risk prediction. The human exposure fingerprinting consists of three or more of the following exposure markers: 2,4,6-tribromophenol, 2,4,5-trichlorophenol, 4-bromophenol, 1-hydroxypyrene, and bisphenol A. This invention is the first to employ the systematic method of urinary contaminant exposure profiling to achieve comprehensive screening and characterization of contaminant exposure markers related to specific components and byproducts in workers exposed to electronic waste. This is currently the most systematic organic contaminant exposure study known in this field.

The application discloses application of a pre-oxidized zero-valent iron / peroxyacetic acid system in removal of chlorophenol organic pollutants, and specifically comprises the following operation process: adding the peroxyacetic acid as an oxidant in an organic pollutant solution containing the chlorophenol, adjusting pH, and adding the pre-oxidized zero-valent iron to activate the peroxyacetic acid to generate hydroxyl radicals and high-valence iron to remove the chlorophenol organic pollutants; and the pre-oxidized zero-valent iron is prepared by mixing and grinding the zero-valent iron and peroxydisulfate. The pre-oxidized zero-valent iron is used for activating the peroxyacetic acid to remove the chlorophenol organic pollutants, and has higher reaction activity and longer service life compared with the heterogeneous zero-valent iron.

The invention relates to the field of macromolecules, and discloses a method for refining polyetherketoneketone and a polyetherketoneketone refined product. The method comprises the following steps: (1) treating a polyetherketoneketone complex by adopting a pretreatment agent; (2) the polyether ketone ketone crude product and a mixed chain supporting solution are mixed and washed, a first product is obtained, the mixed chain supporting solution comprises a main chain supporting agent and a cosolvent, the main chain supporting agent comprises one or more selected from parachlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid, the cosolvent comprises one or more selected from N, N-dimethylformamide and dimethyl sulfoxide, and the main chain supporting agent comprises one or more selected from dichlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid. The solvent is one or more of water, N-methyl pyrrolidone and N-methyl formamide; (3) adding a mixed aqueous solution into the first product to remove at least part of metal ions to obtain a second product; and (4) washing the second product for multiple times by using an organic solvent, and washing and drying to obtain the refined polyether ketone ketone. The content of aluminum ions in the polyetherketoneketone prepared by the method is low.

The invention discloses a method for treating polychlorinated nitrobenzene-containing wastewater by adopting calcium hydroxide alkaline hydrolysis. The method comprises the following steps: firstly, adding calcium hydroxide into wastewater containing polychlorinated nitrobenzene, carrying out hydrolysis reaction under stirring and temperature control conditions, carrying out nucleophilic substitution on activated chlorine substitution sites and nitro substitution sites in polychlorinated nitrobenzene molecules by utilizing hydroxyl ions to generate phenolic substances such as trinitrodichlorophenol and the like, and separating the phenolic substances to obtain the polychlorinated nitrobenzene-containing wastewater. Performing ultrasonic treatment on the first treatment liquid until the solution turns yellow and the chromaticity is not increased any more to obtain a first treatment liquid, and performing ultrasonic treatment, washing and filtering on the first treatment liquid to remove precipitated solids to obtain the treatment liquid. According to the method disclosed by the invention, the primary attenuation of the polychlorinated nitrobenzene-containing wastewater is realized, and the treatability of the wastewater is improved.

This utility model discloses an apparatus for preparing 2,4,4'-trichloro-2'-nitrodiphenyl ether, relating to the technical field of 2,4,4'-trichloro-2'-nitrodiphenyl ether production apparatus. The inlet of the reaction vessel is connected via pipelines to a 2,4-dichlorophenol tank, a 2-nitro-4-chlorophenol tank, a sodium hydroxide tank, and an N,N-dimethylformamide tank. The outlet of the reaction vessel is connected via pipelines to an extraction tank. The inlet of the extraction tank is connected via pipelines to a deionized water tank and an ethyl acetate tank. The outlet of the extraction tank is connected via pipelines to an organic phase tank. The outlet of the organic phase tank is connected via pipelines to a drying tank. The inlet of the drying tank is connected via pipelines to an anhydrous sodium sulfate tank. The outlet of the drying tank is connected via pipelines to a vacuum distillation tank. The bottom outlet of the vacuum distillation tank is connected via pipelines to a product tank. The process is simple, and the product yield and purity are high.

The invention discloses an N and P co-doped charcoal-silicon dioxide composite material and application thereof in adsorbing phenols in oilfield wastewater, and belongs to the technical field of environmental functional materials. The composite material comprises a biochar matrix, silicon dioxide, and an N element and a P element which are co-doped on the surface of the material and in a skeleton. Silicon dioxide serves as a framework, the high-porosity structure of the material is supported and maintained, the thermal stability of the material is improved, rich surface active sites are introduced through co-doping of N and P, and the adsorption capacity of the material to phenolic pollutants is remarkably improved through the synergistic effect of the silicon dioxide and the N and P. The adsorption capacity of the material to typical oilfield phenols such as phenol, cresol, chlorophenol, nitrophenol and the like is 150-200 mg / g, the adsorption efficiency can reach 96% or above, and the recycling performance can be good through acid and alkali heat treatment. The invention effectively solves the problems of poor adsorption effect, high material cost, insufficient stability, secondary pollution and the like in oilfield wastewater phenol treatment.

This application relates to the field of materials technology, providing a chitosan-polyacrylonitrile composite material, its preparation method, and its application. The general structural formula of the chitosan-polyacrylonitrile composite material is as follows: This application uses inexpensive chitosan and polyacrylonitrile fiber as raw materials to develop a novel chitosan-polyacrylonitrile composite material, overcoming the solubility limitation of chitosan under acidic conditions and simultaneously enhancing its adsorption capacity for phenolic compounds and heavy metals. It exhibits higher selectivity for target pollutants, especially among eight different phenolic compounds (phenol, 4-methylphenol, 4-chlorophenol, 4-nitrophenol, hydroquinone, catechol, resorcinol, and phloroglucinol), showing excellent adsorption performance for hydroquinone, with an adsorption capacity as high as 316.84 mg·g⁻¹. ‑1 Furthermore, this application addresses the soft metal ion Hg. 2+ Its adsorption capacity is outstanding, with a maximum adsorption capacity of 237.18 mg·g⁻¹. ‑1 .

The invention discloses a desorption regeneration method of chlorinated phenol adsorption resin, which comprises the following steps: adsorbing 2, 4-dichlorophenol by using macroporous adsorption resin to obtain a byproduct 5-crude hydrochloric acid, then respectively carrying out desorption regeneration by using a first regenerant and a second regenerant, washing the obtained resin with water, and recycling to adsorb impurities in the crude hydrochloric acid. And the first regenerant and the second regenerant can be uniformly collected, separated and recycled. According to the method, methylbenzene and alcohol substances are respectively used as regenerant, efficient desorption and regeneration of the macroporous adsorption resin containing impurities such as chlorophenol are realized, and the method is simple, low in cost and capable of meeting environmental protection requirements.

The invention provides a method for resource utilization of 2, 4-dichlorophenol rectification residual liquid, and belongs to the technical field of chemical production waste treatment. According to the method, the 2, 4-dichlorophenol rectification residual liquid is used as a raw material, and the 2, 4, 6-trichlorophenol component and the phenyl sulfide catalyst are effectively separated from the 2, 4-dichlorophenol rectification residual liquid through sectional distillation operation and optimization of distillation conditions, the cyclic utilization proportion of the phenyl sulfide catalyst and the use amount of a Lewis acid catalyst, so that the 2, 4, 6-trichlorophenol and the phenyl sulfide catalyst are effectively separated from the 2, 4-dichlorophenol rectification residual liquid. According to the method, the content of 2, 4-dichlorophenol in the chlorinated liquid obtained by efficiently recycling the 2, 4, 6-trichlorophenol component and recycling the polyphenylene sulfide catalyst is greater than 96%. According to the method, the production efficiency is improved, the 2, 4-dichlorophenol rectification residual liquid needing to be treated is reduced, and the production cost is remarkably reduced; the method is simple to operate and easy to implement, avoids complex operation steps in an existing recovery method, effectively solves the problems of high cost and poor adaptability of a traditional process, and provides powerful support for large-scale industrial production and application.

The invention discloses a method for detecting the migration quantity of chlorophenol-containing substances in a bamboo material and a product for food contact, and belongs to the technical field of detection. The method specifically comprises the following steps: 1) preparing a standard solution; 2) sample treatment; and 3) sample testing. According to the method, the sample is subjected to migration test by adopting the water-based simulant, the soaking solution can be directly analyzed on a machine without treatment, derivatization treatment is not needed, and the pretreatment process is simple. According to the invention, the ultra-high performance liquid chromatography-tandem mass spectrometry analysis technology is adopted to analyze the to-be-detected substance, and the detection sensitivity and speed are significantly improved. The combination of the migration treatment technology and the ultra-high performance liquid chromatography-tandem mass spectrometry technology reduces the detection steps, greatly reduces the loss of the target object, and improves the accuracy of the detection result.

The invention discloses a continuous synthesis method of p-tert-butoxychlorobenzene, and belongs to the technical field of organic synthesis. The method comprises the following steps: continuously pumping a parachlorophenol solution and an isobutene solution into a tower reactor for reaction, and continuously feeding a reaction solution into an extraction tower for separation and purification. According to the invention, the tower reactor is combined with continuous extraction, so that the whole process from reaction to post-treatment is continuous, and the production efficiency is greatly improved; according to the method, efficient reaction can be realized under mild conditions, the process control is stable, side reaction is effectively inhibited, and the product yield is high; meanwhile, equipment is safe and reliable, the comprehensive production cost is remarkably reduced, and the method is suitable for industrial large-scale application.

The utility model discloses a chlorophenol organic pollutant treatment device based on photocatalysis, and relates to the technical field of organic pollutant treatment. The device comprises a treatment barrel, a top cover is fixedly arranged at the center of the top of the treatment barrel, a stirring assembly is arranged in the treatment barrel, a medicine storage assembly is arranged on the side face of the treatment barrel, a medicine injection assembly is arranged at the top of the medicine storage assembly, and a plurality of catalyst storage assemblies and ultraviolet lamps which are distributed at intervals are installed in the treatment barrel; the medicine storage assembly comprises a mounting frame fixedly arranged on the outer side of the treatment barrel, a medicine storage barrel is placed in the mounting frame, a medicine outlet pipe with the top penetrating through the medicine storage barrel is fixedly arranged in the medicine storage barrel, a first one-way valve is fixedly arranged at the top of the medicine outlet pipe, and a medicine injection pipe is communicated between an output port of the first one-way valve and the treatment barrel. According to the utility model, the pH adjusting liquid in the medicine storage barrel is quantitatively squeezed into the treatment barrel through the medicine outlet pipe and the medicine injection pipe, so that the pH value of the liquid to be treated in the treatment barrel is adjusted, and the decomposition rate of chlorophenol organic pollutants is improved.

The invention discloses a synthetic method of parachlorophenol. The method comprises the following steps: mixing parachloroaniline, sulfonic acid and an organic solvent to obtain a mixed solution, adding a diazotization reagent into the mixed solution, and carrying out diazotization-hydrolysis reaction through ion exchange resin type solid acid to obtain parachlorophenol. Parachloroaniline is used as a raw material, and a stable acidic reaction environment is constructed through p-toluenesulfonic acid and a solid acid catalyst. The p-toluenesulfonic acid is used for rapidly establishing and maintaining the acidity required by diazotization at the initial stage of the reaction and in the reaction process, and the solid acid catalyst Amberlyst15 provides uniformly-distributed acidic active sites in an immobilization form, so that the accumulation of free sulfonate in the system is effectively reduced while the reaction activity is ensured, the heat transfer and mass transfer conditions are improved, and the reaction efficiency is improved. The controllability and the continuous operation stability of the reaction process are improved, and safe and efficient preparation of parachlorophenol is realized.

The invention discloses a synthetic method of dehydrolinalool, and relates to the technical field of fine chemical engineering, and the synthetic method comprises the following steps: carrying out a reaction on linalool and acetic anhydride to obtain acetyl linalool; the preparation method comprises the following steps: carrying out a reaction on 2, 6-dimethyl-3-chloro-6-acetoxyl-1, 7-octadiene and trichloroisocyanuric acid to obtain 2, 6-dimethyl-3-chloro-6-acetoxyl-1, 7-octadiene; under the action of aluminum phosphotungstate, reacting with lithium hydroxide to obtain 2, 6-dimethyl-6-acetoxyl-1, 3 (E), 7-octyltriene, and then reacting with 2, 6-dimethyl-6-acetoxyl-1, 3 (E), 7-octyltriene under the action of aluminum phosphotungstate; 2, 6-dimethyl-1, 3 (E), 7-trialkenyl-6-octanol reacts with a sodium hydroxide solution, and 2, 6-dimethyl-1, 3 (E), 7-trialkenyl-6-octanol is obtained; the preparation method comprises the following steps: under the catalysis of SO4 < 2-> / Fe2O3 and lipase Lipase AK, reacting with p-chlorophenol acetate to obtain (R)-2, 6-dimethyl-6-acetoxy-1, 3 (E), 7-octyltriene; and reacting with a sodium hydroxide solution to obtain the dehydrolinalool. The method is mild in reaction condition, low in cost and suitable for industrial production.

The present application relates to a simple preparation method of p-chlorophenol, which comprises the following steps: putting phenol into a four-necked flask, adding dichloromethane, stirring and dissolving, then adding a catalyst, slowly dropping chlorinating reagent, pouring the solution in the four-necked flask into a quenching kettle after the reaction is completed, adding water again, separating layers, discarding the water layer, removing dichloromethane to obtain a crude p-chlorophenol, wherein the weight ratio of raw materials is catalyst: phenol: water: chlorinating reagent: dichloromethane = 1:120:40:172:780; sending the crude product into a rectification kettle for rectification, receiving main fraction p-chlorophenol when the tower top is 65 DEG C; the yield is 82%, and the purity is 99.6%. The advantages are that p-chlorophenol is synthesized by taking phenol as a starting raw material and taking sulfuryl chloride as a chlorinating reagent at a temperature of 40-50 DEG C; the method is reasonable, the operation is simple, the yield is high, and the purity meets the quality research requirements. By rechlorination, the by-product o-chlorophenol can be changed into 2,4-dichlorophenol, and the by-product can be used for production.

This invention belongs to the field of organic synthesis, specifically relating to a method for preparing 2,6-dichlorofluorobenzene, comprising: phenol and a chlorination reagent. N Chlorosuccinimide undergoes a chlorination reaction in the presence of a Pd catalyst and 1,10-phenanthroline-5,6-dione to produce 2,6-dichlorophenol. 2,6-Dichlorophenol, fluorinating agent NFSI, photocatalyst 4-CzIPN, and an ionic liquid undergo a deoxyfluorination reaction under blue LED irradiation to produce 2,6-dichlorofluorobenzene. This invention offers high product yield and purity, mild reaction conditions, and avoids the use of hazardous raw materials, making it suitable for industrial production.

The present application relates to the field of environmental bioremediation, and discloses a dehalobacter and application of the dehalobacter in remediation of chlorophenol halogenated hydrocarbon pollutants. The dehalobacter is Co4CP (Dehalobacter sp. strain Co4CP), and the strain has been preserved in the China General Microbiological Culture Collection Center (CGMCC) on February 24, 2024, located at No. 1, Xibahe Road, Hua-yuan District, Beijing, China, and the Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, with a preservation number of CGMCC 41183. The strain provides an important strain resource for in-situ remediation of chlorophenol contaminated sites.

The invention provides a method for preparing chloranil, which comprises the following steps: in the presence of a first solvent and a first catalyst, carrying out hydroxylation reaction on chlorobenzene and hydrogen peroxide to obtain chlorophenol; in the presence of a second solvent and a second catalyst, chloro-phenol, a chlorinating agent and an oxidizing agent are subjected to a chlorine oxidation reaction, and chloranil is obtained.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of triazolone-14C. Comprising the following steps: synthesizing phenol-14C: preparing a system A: adding water and concentrated sulfuric acid into a single-mouth bottle and stirring; performing liquid separation on aniline hydrochloride-14C and a saturated sodium bicarbonate solution, performing extraction, adding an organic phase into the system A, performing reaction concentration, dropwise adding sodium nitrite, adding methylbenzene, and performing reaction at 100 DEG C; extracting, drying, filtering, concentrating, and passing through a chromatographic column; the preparation method comprises the following steps: synthesizing 4-chlorophenol-14C, namely dropwise adding N-chlorosuccinimide into 4-chlorophenol-14C, p-toluenesulfonic acid and acetonitrile, and reacting completely; extracting, drying, filtering, concentrating, and passing through a chromatographic column; 4-chlorophenol-14C, ethyl acetate, 1, 2, 4-triazole, potassium carbonate and 600 polyethylene glycol are synthesized, 1, 1-dichloropinacolone is dropwise added, and a reaction is conducted at the temperature of 85 DEG C; after the reaction is finished, cooling to room temperature, extracting, drying, filtering, concentrating, and passing through a chromatographic column; the total yield of the three steps is basically maintained between 60% and 85%, the synthetic reaction conditions are simple, and the yield is high.

The present application relates to a kind of wide-range lead ion colorimetric detection method based on four manganese oxide laccase activity anti-competitive inhibition, it is related to lead ion colorimetric detection technical field.The method utilizes the activity change of Mn3O4 catalysis 2,4-dichlorophenol and 4-aminoantipyrine color reaction as signal output, when Pb (II) exists in system, color reaction is inhibited, the absorbance of solution at 510 nm is significantly reduced;The detection range of the method to Pb (II) covers 1~2000 μM, the detection limit in low concentration interval is as low as 0.31 μM, in high concentration interval still maintains good linear response, the detection range is far more than most of the colorimetric detection methods currently reported, and simultaneously, the method has excellent selectivity and anti-interference to Pb (II).

The present application belongs to the field of water pollution treatment, and particularly relates to a method for degrading chlorophenol organic pollutants in water by activating persulfate with a cobalt-cerium dioxide monatomic catalyst in the presence of bicarbonate. The present application calcines cerium nitrate hexahydrate in a muffle furnace to obtain cerium dioxide. A catalyst precursor is prepared by using a traditional equal-volume impregnation method. The catalyst precursor is annealed at different temperatures to obtain a series of catalysts, wherein Co1-CeO2-700 has the best catalytic performance and has more excellent catalytic performance in the presence of bicarbonate. The preparation method provided by the present application has simple steps, is easy to operate, has fast effect on treating chlorophenol, high product yield, low cost, good economic value and social benefits. The monatomic catalyst prepared by the present application has high atomic utilization rate, good stability and excellent catalytic effect, and is expected to become a key technology for solving actual water environmental organic pollution.

The method for self-sensitization detection of 2-chlorophenol based on eosin Y-carbon nitride system relates to the application technology field of eosin Y-carbon nitride system in visual detection of 2-chlorophenol. The purpose of the present application is to solve the problems of how to improve the selective adsorption capacity of g-C3N4 to trace concentration 2-chlorophenol and realize visual super-sensitive detection of colorless 2-chlorophenol. Method: tetra bromo fluorescein disodium aqueous solution, silver modified carbon nitride nanosheet suspension and 2-chlorophenol aqueous solution are mixed, and the pH is adjusted to 3-9; the mixed solution is placed in a photocatalytic reactor, stirred and adsorbed for 1-30 min in the dark, 525 nm visible light is turned on, and after light irradiation, the filtrate is detected by ultraviolet visible spectrophotometer, and the visual detection of 2-chlorophenol in water based on single-atom silver modified carbon nitride nanosheet is completed. The method for self-sensitization detection of 2-chlorophenol based on eosin Y-carbon nitride system can be obtained.

The invention discloses a high-pressure reaction tank for directional hydroxylation reaction of chlorotoluene, and relates to the technical field of chemical reaction equipment, the high-pressure reaction tank comprises a high-pressure reaction tank body, a tank cover, a directional catalysis assembly, a material uniform mixing assembly and a temperature and pressure control assembly; the directional catalysis assembly is suspended in the center in the tank through a detachable catalysis basket, and a fan-shaped filling cavity in the basket is filled with a supported catalyst containing directional group modification, so that directional selectivity of chlorotoluene hydroxylation is realized; the material uniform mixing assembly adopts a double-layer composite stirring paddle matched with an oxidant porous dispersion head to strengthen material mixing and oxidant dispersion; the temperature and pressure control assembly is linked with a PID controller through double temperature sensors and a pressure sensor, precise regulation and control of temperature, pressure and oxidant dripping rate are achieved, a liquid level sensor is linked with a feeding valve to achieve automatic control of feeding amount, and the problems that a traditional reaction tank is poor in directional selectivity, uneven in mixing, low in temperature and pressure control precision and the like are solved. The method is suitable for industrial oriented synthesis of chlorinated phenol.

This invention provides an NH2-ZnS@β-CD-MOF fluorescent composite material, its preparation method, and its application. Specifically, β-CD-MOF and NH2-ZnS are dissolved in a methanol solution, stirred in the dark, and centrifuged to obtain a white precipitate. The white precipitate is then washed with methanol solution and vacuum dried in the dark to obtain the NH2-ZnS@β-CD-MOF fluorescent composite material. This fluorescent composite material is used in the preparation of fluorescent sensors. The fluorescent sensor of this invention can not only achieve linear detection of formaldehyde at low concentrations but also detect 4-chlorophenol in aqueous solutions. Furthermore, when the concentration of NH2-ZnS@β-CD-MOF is 0.7 mg / mL, the composite material dispersed in deionized water exhibits the highest luminescence intensity and shows good linearity for both formaldehyde and 4-chlorophenol within a certain concentration range.