146 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 invention discloses a microbial electrochemical efficient preparation method and application of metal nanoparticles, the metal nanoparticles are prepared and synthesized by regulating the redox metabolism behavior of microorganisms through positive / negative constant potential, and the microorganisms are electroactive microorganisms domesticated and cultured by activated sludge or single bacteria; the metal nanoparticles are in a solid state of a metal simple substance, are formed on the surface of an electroactive biological membrane, and are generated by electroactive microorganisms through extracellular electron transfer dissolved-state metal salt reduction. The palladium or silver and other metal nanoparticles prepared by the method are uniformly distributed on the surface of the electroactive biological membrane, the particle size is 1-10nm, the electroactive biological membrane-metal nanoparticle complex has extremely strong reducibility, and the electroactive biological membrane-metal nanoparticle complex is used for treating a non-biodegradable organic pollutant (4-chlorophenol), so that compared with a non-electroactive biological membrane and a treatment group without metal ions, the electroactive biological membrane-metal nanoparticle complex has the advantages that the biodegradability is greatly improved; the degradation effect is the best.

The present invention discloses a preparation method and application of a Bi2O2S / Bi 12 TiO 20 composite photocatalytic material, which includes weighing Bi2O3 and titanium dioxide, grinding them evenly, putting them into a muffle furnace, heating to 700 °C, maintaining the temperature for 6 - 8 h, and then naturally cooling to room temperature to obtain Bi 12 TiO 20 catalyst; dispersing Bi 12 TiO 20 in deionized water, adding a hydrazine hydrate solution of thiourea, stirring, adding KOH and NaOH, stirring well, standing, centrifuging, washing the centrifuged product alternately with water and ethanol, and drying to obtain Bi2O2S / Bi 12 TiO 20 composite photocatalyst. The present invention adopts the normal temperature standing method, and the energy consumption during the synthesis process is low; the Bi2O2S / Bi 12 TiO 20 composite material is a block-coupled sheet combination structure, and the combination of the two materials can greatly improve the separation efficiency of electron-hole pairs and has excellent performance in photocatalytic degradation of 2,4-dichlorophenol.

The invention belongs to the technical field of chemical analysis and detection, and relates to a method for rapidly detecting sodium ions in cigarette paper by nano-enzyme laccase. According to the method, 2-aminoterephthalic acid, copper nitrate and cerous nitrate are taken as precursors, polyvinylpyrrolidone is taken as a stabilizer, and a solvothermal method is adopted to synthesize the copper-cerium-containing MOF-based nano-enzyme with laccase-like activity, namely Cu / Ce-BDC-NH2 nano-enzyme; cu / Ce-BDC-NH2 nano-enzyme oxidizes 2, 4-dichlorophenol and 4-aminoantipyrine to obtain a red product, the potassium pyroantimonate ligand is adsorbed on the surface of Cu / Ce-BDC-NH2 to inhibit catalytic action, so that laccase-like activity is reduced, Na < + > is introduced to react with potassium pyroantimonate to generate a stable complex, the activity of Cu / Ce-BDC-NH2 laccase is recovered, and the red color of a solution is deepened. The invention establishes a novel colorimetric rapid detection method for sodium ions.

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.

The invention discloses weather-resistant unsaturated polyester resin as well as a preparation method and photovoltaic application thereof, and relates to the technical field of high polymer materials. When the weather-resistant unsaturated polyester resin is prepared, 1, 6-hexanediol, itaconic acid and an ultraviolet absorption monomer are subjected to esterification and polycondensation to prepare unsaturated polyester; the preparation method comprises the following steps: carrying out reaction on naringenin and 4-isocyanate-tetramethylpiperidine oxide to prepare a functional cross-linking agent; the preparation method comprises the following steps: reacting 3-(4-chlorphenyl) phosphine, 2, 2 '-thiobis (4-chlorophenol) and 2-butene-1, 4-diamine, and polymerizing and coating silicon dioxide to prepare pre-modified silicon dioxide; reacting the pre-modified silicon dioxide, n-butylamine and nickel acetate to obtain modified silicon dioxide; uniformly mixing unsaturated polyester, a functional cross-linking agent and modified silicon dioxide, and performing injection molding to obtain the weather-resistant unsaturated polyester resin. The weather-resistant unsaturated polyester resin prepared by the invention has excellent anti-aging, flame-retardant, self-repairing and mechanical properties.

The invention discloses a preparation method and application of a self-supporting iron-nickel-boron-loaded foamed nickel composite material, and the preparation method comprises the following steps: alternately immersing foamed nickel into a reducing agent solution and an iron precursor solution by adopting an alternate immersion method to promote metal ions to grow iron-nickel-boride on the surface of the foamed nickel in an autocatalytic manner, thereby obtaining the self-supporting iron-nickel-boron-loaded foamed nickel composite material. And thus, the self-supporting iron-nickel-boron loaded foam nickel composite material is obtained. The composite material can be used for assembling a catalyst module, activating periodate and realizing complete degradation of chlorophenol compounds. The prepared self-supporting composite material has high catalytic activity and stability, active components are uniformly and firmly distributed, a catalyst module constructed based on the self-supporting composite material effectively avoids separation and recovery difficulty of a powder catalyst in practical application, modular management and large-scale amplification are facilitated, and the self-supporting composite material has a wide application prospect and is suitable for industrial production. Especially in the technical field of environmental engineering.

The invention discloses a method for detecting the content of chlorophenol substances in a bamboo material and a product for food contact, and belongs to the technical field of detection. The method specifically comprises the steps of standard liquid preparation, sample treatment and sample testing. According to the method, a content and migration quantity pretreatment mode without derivatization treatment is adopted, and an ultra-high performance liquid chromatography-tandem mass spectrometry detection technology is matched, so that the method for testing the content of the chlorophenol substances in the bamboo and wood materials and products for food contact, which is simple in pretreatment process, accurate in test, efficient, rapid, high in sensitivity and high in practicability, is realized.

The invention 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 radicals. According to the invention, cerium nitrate hexahydrate is calcined in a muffle furnace to obtain cerium dioxide. A catalyst precursor is prepared by a traditional isovolumetric impregnation method. The prepared catalyst precursor is annealed at different temperatures to obtain a series of catalysts, the catalytic performance of Co1-CeO2-700 is optimal, and the Co1-CeO2-700 has more excellent catalytic performance in the presence of bicarbonate radicals. The preparation method provided by the invention has the advantages of simple steps, convenience in operation, quick effect of treating chlorophenol, high product yield and low cost, and has good economic value and social benefit. The prepared monatomic catalyst has the advantages of being high in atom utilization rate, good in stability, excellent in catalytic effect and the like, and is expected to become a key technology for solving actual water environment organic pollution.

The invention discloses activated edible fungus residue biochar as well as a preparation method and application thereof, and aims to provide activated edible fungus residue biochar which is obtained by taking edible fungus residues as a carbon source, pre-carbonizing materials, performing alkali activation and then performing high-temperature carbonization, and the preparation method is simple and convenient to operate and low in cost; the activated edible fungus residue biochar realizes degradation of 4-chlorophenol and tetracycline in water by peroxydisulfate with a very small amount, solves the problems of low catalytic efficiency and large addition amount of a current transition metal catalyst, and belongs to the field of environmental governance.

The invention relates to an electroactive microbial system for removing parachlorophenol and a method thereof, and aims to provide an electroactive microbial strain for reducing Fe < 0 > oxidized under the condition of oxygen, generating active Fe < 2 + > and further removing parachlorophenol, so that the defect that Fe < 0 > is easy to passivate when organic pollutants are treated is overcome. In addition, an allogenic material is also introduced, so that the degradation efficiency of the electroactive microorganism enhanced zero-valent iron aeration system on 4-CP is improved; the operation is simple, the cost is low, and meanwhile, the pollution to the environment is avoided; according to the technical scheme, the electroactive microbial system for removing parachlorophenol comprises the following components: 0.08 g / L to 0.60 g / L of zero-valent iron, 0.5 mmol / L to 5.0 mmol / L of allogenic substances and 5 g / L to 40 g / L of electroactive microbial strains, the electroactive microbial strains are shewanella decolorata S12 and shewanella putrefaciens SP200, and the electroactive microbial strains are prepared from the shewanella decolorata S12; the microbial inoculum is at least one of shewanella sp. MR-1 and sulfur reduction geobacter PCA; belongs to the field of environmental microorganisms.

The invention discloses a mixed blank matrix for vegetable pesticide residue analysis and detection and its application, including the preparation of blank matrix and the preparation of mixed blank matrix, the raw materials of mixed blank matrix are calculated by weight: 20-30 parts of Chinese cabbage, 20-40 parts of cucumber, 10-40 parts of spinach, 5-30 parts of cauliflower; after the blank matrix and the mixed blank matrix are pre-treated, the matrix matching standard solution establishes a standard curve, and the pure solvent standard curve is established at the same time; the corresponding matrix effect is calculated using the slope; the matrix matching degree is calculated; the practicality of the mixed blank matrix is ​​evaluated. The mixed blank matrix can reduce or eliminate the matrix effect, and is suitable for the simultaneous determination of the residual amounts of dichlorvos, chlorpyrifos, pirimicarb, metalaxyl, chlorpyrifos, triadimefon, procymidone, myclobutanil, propiconazole, bifenthrin and etoxazole in 8 different vegetables (cucumber, Chinese cabbage, spinach, cauliflower, lettuce, celery, green onion, green vegetables), which can improve work efficiency, reduce the time cost caused by the blindness of obtaining blank matrix, and reduce the maintenance cost of the instrument.

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 invention belongs to the technical field of organic synthesis, and particularly relates to a p-chlorophenyl ether compound, a preparation method thereof, and an application thereof. Disclosed by the present invention is a novel p-chlorophenyl ether compound, 3,3'-oxybis(1-(4-chlorophenoxy)isopropyl-2-ol). Mainly using p-chlorophenol and 3-chloro-1,2-propanediol as raw materials, in a mixed solvent of isopropanol and water, a reaction occurs in the presence of a base, and the reaction solution is subjected to column chromatography to obtain 3,3'-oxybis(1-(4-chlorophenoxy)isopropyl-2-ol). The preparation process of this compound is simple, the synthesis route is short, and the antibacterial ability is strong.

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.

The invention discloses a refining method of pyromellitic dianhydride, which comprises the following steps: adding a good solvent into a pre-crystallization solution obtained by hydrolysis reaction of a pyromellitic dianhydride crude product to obtain a pyromellitic acid crystal; carrying out flash evaporation dehydration on the pyromellitic acid crystal to obtain primarily purified pyromellitic dianhydride; and carrying out sublimation treatment on the primarily purified pyromellitic dianhydride to obtain a pure pyromellitic dianhydride product. According to the invention, a hydrolysis refining method and a sublimation purification method are combined to purify the pyromellitic dianhydride crude product, and the hydrolysis refining method is improved, so that the purity and yield of the pyromellitic acid crystal are improved, and the pyromellitic acid crystal with fine and uniform particle size is obtained, thereby improving the purity and yield of the pyromellitic dianhydride; furthermore, the pyromellitic acid crystals are dehydrated by adopting a flash evaporator, so that the dispersity of the pyromellitic dianhydride purified once is improved, the sublimation treatment efficiency is improved, and the purity and yield of the pyromellitic dianhydride are further improved.

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 invention provides a method for detecting chlorophenol compounds in waste gas and application, and belongs to the technical field of waste gas pollutant detection. The method comprises the following steps: S1, preparing a combined adsorbent from polyurethane foam and macroporous resin, and collecting waste gas by adopting a sampling barrel filled with the combined adsorbent; s2, extracting the combined adsorbent by using a Soxhlet extraction method, and then mixing the extract with methanol to a constant volume to obtain a sample; s3, adding acetic anhydride and triethylamine in a volume ratio of (3-4): 1 into the sample, and carrying out derivatization treatment to obtain a detection sample; and S4, analyzing the detection sample by a GC-MS / MS method to obtain the concentration of the chlorophenol compound in the waste gas. According to the method, gaseous chlorophenol can be efficiently enriched and stably captured, other complex gas components interfering detection signals are removed, then the rapid corresponding degree and sensitivity of sample detection are improved through derivatization treatment, and meanwhile the method has the anti-interference capacity and operation convenience.

The invention discloses a preparation method and application of an electrode of bioelectrochemical equipment. The method comprises the following steps: S1, pretreatment; s2, preparing a polyvinyl alcohol solution; s3, preparing electrode slurry; s4, coating is carried out; and S5, drying. The electrode is used for treating chlorophenol wastewater. The electrode provided by the invention is prepared by modifying zero-valent iron, is arranged in an anode region of a bioelectrochemical reactor, and can effectively regulate and control oxidation-reduction potential, strengthen electron transfer between iron reducing bacteria and acetogenic bacteria at an anode and enrich acetogenic flora by loading trace zero-valent iron, so that the yield of acetic acid in an acidogenic phase is increased; the synchronous pollutant removal and methane yield increase are realized, and the economic benefit is improved.

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 relates to the technical field of organic synthesis, in particular to an efficient catalytic synthesis method of chlorphenesin, which comprises the following steps: dissolving ZIF-8 powder in absolute methanol for ultrasonic treatment, then adding ferric chloride ionic liquid for stirring and centrifuging, and then washing and drying solids obtained by centrifuging to obtain a ZIF-8 / ZIF-8 composite material; the composite catalyst is obtained; the preparation method comprises the following steps: adding parachlorophenol and a composite catalyst into isopropanol, mixing, heating and activating, then adding glycidol and a sodium hydroxide solution, carrying out heating reaction, filtering after the reaction is finished, and collecting filtrate; adding deionized water into the filtrate, stirring, standing for layering, discarding a lower-layer water phase to obtain an organic phase, carrying out reduced pressure distillation on the organic phase to recover isopropanol, and recrystallizing and drying a residual crude product to obtain chlorphenesin. The novel composite catalyst is adopted, and the product purity can reach 99% or above.

The application provides a kind of poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane and application, the poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane, poly (methyl methacrylate) (PMMA) and polyethylene glycol (PEG) two polymers are stirred and dissolved in N, N-dimethylformamide solvent to form casting solution, the nanofiltration membrane of specific thickness is prepared by doctor blade, then, the prepared nanofiltration membrane is placed in fume hood and stands, based on the different solvent evaporation rates of upper layer and bottom of nanofiltration membrane, form a blend asymmetric nanofiltration membrane with dense structure, immerse the blend asymmetric nanofiltration membrane in deionized water, remove the solvent by phase transfer method, and then solidify the membrane; in the process of membrane preparation, poly (methyl methacrylate) is the main support material, polyethylene glycol is the pore former and hydrophilic material, and the membrane realizes efficient separation and removal of neutral chlorophenol disinfection by-products with molecular weight ≤200 in water.

The present application relates to a hybridoma cell strain secreting benzyl chlorophenol monoclonal antibody and its application, and belongs to the technical field of immune detection. The present application synthesizes benzyl chlorophenol hapten, prepares benzyl chlorophenol complete antigen, and through the steps of mouse immune response and cell fusion, a hybridoma cell strain secreting benzyl chlorophenol monoclonal antibody is screened and named CBP-3D4, which is preserved in the China General Microbiological Culture Collection Center with a preservation number of CGMCC NO.46222. The monoclonal antibody secreted by the hybridoma cell strain has good sensitivity and specificity, the IC 50 value of the monoclonal antibody secreted by the hybridoma cell strain for benzyl chlorophenol is 97.741 ng / mL, the cross reactivity of the monoclonal antibody for various benzyl chlorophenol functional analogs is less than 1%, and the monoclonal antibody can be applied to the preparation of benzyl chlorophenol detection products to realize the rapid quantification of benzyl chlorophenol.

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.