485 results about "Chlorophenol" patented technology

The invention relates to the technical field of preparation of environment functional materials, in particular to a magnetic composite material surface imprinting thermosensitive adsorbent, and a preparation method and the application thereof. The method comprises the following steps that: firstly, a ferroferric oxide/nerchinskite nanotube magnetic composite material is prepared by a solvent thermal synthesis method; secondly, the magnetic composite material is modified on ethenyl by using 3-(methacrylo) propyltrimethoxyl silane; and finally, the nerchinskite nanotube magnetic composite material is prepared by using the ethenyl-modified magnetic composite material as a substrate material, 2, 4, 5-trichlorophenol as a template molecule, methacrylate as a functional monomer, N-isopropylacrylamide as a thermosensitive functional monomer, ethylene glycol dimethacrylate as a cross-linking agent, and 2,2'-azodiisobutyronitrile as an initiator. The prepared thermosensitive imprinting adsorbent is obvious in thermal stability and magnetic stability, sensitive in magnetic effect and thermosensitive effect, relatively high in adsorption capacity, obvious in reversible absorption/release function along with temperature and obvious in tertiary calcium phosphate (TCP) molecule recognition performance.

The invention discloses a preparation method of a nano Fe3O4/CeO2 composite material and application thereof, belonging to the technical field of material preparation and environment. In the preparation method, with nano CeO2 particles as a carrier, the nano Fe3O4/CeO2 composite material is synthesized by adopting a coprecipitation method; and in the application method, the nano Fe3O4/CeO2 composite material is used as a Fenton-like catalyst and reacts with chlorophenol waste water under the coexistence of Fe3O4/CeO2 and H2O2 to degrade chlorophenol organic matters in waste water. The nano Fe3O4/CeO2 composite material disclosed by the invention has the advantages of simple synthesis process, low equipment requirement and low cost; the catalyst has magnetism, is easy to recover and can berecycled; and a heterogeneous Fenton-like method is highly-efficient, rapid, economic and feasible and has no secondary pollution when used for treating the chlorophenol waste water, thereby having wide application prospect.

The invention belongs to the technical field of semiconductor photocatalysis, and in particular relates to a sulfur doped graphite phase carbon nitride pholocatalyst and application thereof in photocatalysis TCP (2,4,6-trichlorophenol) degradation reaction and photocatalysis hydrogen preparation reaction. A dielectric barrier discharge plasma generator is adopted, and H2S is used as a discharge gas to perform discharge treatment on a graphite phase carbon nitride catalyst. The sulfur species have high activity under a plasma state, so that compared with a conventional preparation method, graphite phase carbon nitride catalysts can be doped more easily. The sulfur doped graphite phase carbon nitride pholocatalyst provided by the invention has the advantages that the sulfur doped amount is adjustable, the specific area of a product catalyst is large, the visible light absorbability is strong, the electron-hole separation efficiency is high, and the photocatalysis performance is good. The catalyst prepared by the method provided by the invention is applied to a photocatalysis degradation process of a common pollutant namely 2,4,6-trichlorophenol (TCP) and a photocatalysis water decomposition hydrogen preparation process, the same evaluation device is adopted, and compared with the sulfur doped graphite phase carbon nitride pholocatalyst prepared by a conventional method, the sulfur doped graphite phase carbon nitride pholocatalyst provided by the invention shows more superior catalytic activity.

The invention relates to a method for preparing magnetic molecularly imprinted polymers (MIPs) through suspension polymerization, belonging to the technical field of preparation of environmental functional materials. In particular, in the method for preparing the magnetic MIPs through suspension polymerization, Fe3O4 magnetic particles are synthesized through a hydrothermal synthesis method, methacrylic acid is taken as a functional monomer, 2,4,6-trichlorophenol (2,4,6-TCP) is taken as template molecules, azodiisobutyronitrile is taken as an initiator, methylbenzene is taken as a pore-foaming agent, ethylene glycol dimethacrylate is taken as a crosslinking agent, and polyvinyl alcohol is taken as a stabilizing agent. The obtained MIPs are regular spheres, holes of specific shapes and sizes left by a plurality of template molecules are formed in the surfaces of the polymers, and specifically-arranged binding sites are arranged in the holes. By adopting the MIPs, highly-selective adsorption of a target pollutant, namely, 2,4,6-trichlorophenol can be realized.

The invention relates to a method for preparing magnetic porous polystyrene microspheres on the basis of suspension polymerization, belonging to the technical field of preparation of environmental functional materials. The method comprises the following steps: synthesizing Fe3O4 magnetic particles by a solvothermal process; and preparing magnetic porous polystyrene microspheres by suspension polymerization by using styrene and divinylbenzene as functional monomers, azodiisobutyronitrile as an initiator and toluene and cyclohexanol as pore-forming agents. The obtained microspheres have abundant pores on the surface, thereby being beneficial to enhancing adsorbability; and the Fe3O4 magnetic particles inside the microspheres have magnetic stability, and can be quickly separated under the action of an external magnetic field. The adsorbent is used in a water environment for selectively adsorbing 2,4-dichlorophenol and 2,6-dichlorophenol. The static adsorption experiment result indicates that the magnetic porous microspheres prepared by the method have the advantages of favorable adsorption capacity, quick adsorption kinetic property and favorable regenerability.

The invention discloses a method of low-temperature catalytic dechlorination of chlorinated aromatic hydrocarbons. The method uses chlorophenol as pollutant, in the presence of Pd, uses hydrogen as a reducing agent and hydrogen pressure as atmospheric pressure, controls temperature in the range of 258 to 273k, adds a triethylamine dechlorination reagent in batches, carries out catalytic hydrogenation and dechlorination reaction in organic solvent, and can remove 5 to 20 moles of chlorine per mole of Pd catalyst per minute, and phenol produced in a high selectivity way can be recycled. Through simple filtration, the Pd catalyst can be reused for plural times without losing activity. The process of the invention can be effectively used for low-temperature catalytic hydrogenation and dechlorination for chlorinated aromatic compounds, and has good prospect for industrialization in environmental protection.

The invention discloses a novel hydrate kinetic inhibitor and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving a monomer into a solvent, adding an initiator to trigger the polymerization of a solution, to obtain a novel hydrate kinetic inhibitor, wherein the main component of the inhibitor is polyhydroxyl polymer; the monomer is prepared by reacting chlorophenol with N-vinyl caprolactam or N-vinnyl pyrrolidone. The inhibitor has an effect that other inhibitors are combined with alcohols for use, can bear low supercooled temperature, the formation and induction time of a hydrate can be prolonged, the inhibitor of the hydrate inhibitor can be improved, and the novel hydrate kinetic inhibitor is high in efficiency, low in dose, wide in applicability and the like.

The invention discloses a Pseudomonas aeruginosa strain TBPY, which is screened from tribromophenol(TBP)-polluted sludge and purified. The purified strain is domesticated by a pressure type domesticating method with gradually increased TBP concentration in an organic salt culture medium, and the domesticated strain can be used for the biological control of waste water containing persistent organic pollutants such as phenol, pyrocatechol, resorcinol, benzoic acid, p-hydroxybenzoic acid, vanillin, 4-chlorophenol, 2,4-dichlorophenol, trichlorophenol and tribromophenol and has high research and application values.

The invention discloses a method for recovering and treating phenolic wastewater, which comprises the following steps of: adding solution of formaldehyde and a base catalyst into the phenolic wastewater to perform substitution reaction, and then adding the solution of formaldehyde and the base catalyst into the phenolic wastewater again to perform substitution and polycondensation reaction; after reaction, separating the obtained phenolic resin from the wastewater, and then treating the wastewater by the next step; further treating the separated wastewater by a catalytic wet oxidation process; and finally, performing biological treatment on the phenolic wastewater to meet the emission requirement. The method has the advantages of simple process, stable, reliable and safe operation, and capacity of well treating the phenol and chlorophenol-containing wastewater, so that the wastewater reaches the emission standard, the phenol in the wastewater can be converted into the phenolic resin at the same time to be recycled, and the comprehensive treatment and recycling of the wastewater are realized.

The invention discloses a device and a method for treating the wastewater containing parachlorophenol and simultaneously recovering power energy, wherein the device comprises an anode chamber and a cathode chamber which are integrated into a whole; a proton exchange membrane is arranged between the anode chamber and the cathode chamber; an anode and an aerator pipe are arranged in the anode chamber; and a cathode and an aerator pipe are arranged in the cathode chamber. In the process of treating the wastewater containing parachlorophenol, the method uses the anaerobic sludge inside the anode chamber for oxidizing the protons and electrons generated by the organic matters of nutrient fluid under anaerobic condition so as to reduce the parachlorophenol in the wastewater into phenol and recover power energy simultaneously. The device with simple structure and convenient operation can be applied at normal temperature and is applicable to the treatment of the wastewater containing organic contaminants of chlorophenols. The method has more than 90 percent and maximally 100 percent of parachlorophenol removal rate and can recover power energy in the treatment process. The device and the method can run for a long time after one-shot and can be applied to treating high concentration wastewater containing organic contaminants of chlorophenols, thus being suitable for large-scale popularization and application.

The invention provides a purpose of modified hydrotalcite based on dodecyl benzene sulfonate and lauryl sulfate, and particularly relates to an adsorbing agent used for adsorbing 2, 4, 6-trichlorophenol in a wastewater solution. According to modified hydrotalcite, with sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS) as a modifying agent, modified Zn2Al-LDHs is prepared and obtained by a co-precipitation method, the adsorbing agent has larger laminated plate spacing compared with the adsorbing agent before modification, and the hydrophilic surface becomes hydrophobic after modified. The adsorbing agent adsorbs 2, 4, 6-trichlorophenol and reaches adsorbing balance after 2-3 hours under the conditions that the pH value is 3-5 and the temperature is 25-35 DEG C; the adsorbing capacity reaches 100-160mg/g, and the adsorption rate reaches 70-83%. The adsorbing agent is applicable to 30-300mg/L wastewater solution containing 2, 4, 6-trichlorophenol and has the characteristics that the price is low, the adsorbing capacity is large and the adsorbing process is simple and convenient and is easy to operate and the like.

The invention relates to a preparation method of a hydroxyl-ferric oxide/graphene oxide composite material and application of the hydroxyl-ferric oxide/graphene oxide composite material. The hydroxyl-ferric oxide/graphene oxide composite material is formed by mixing a turbid liquid of graphene oxide and a turbid liquid of hydroxyl-ferric oxide according to the volume ratio of 1: (1-2), dispersing, and compounding by a hydrothermal method. The prepared hydroxyl-ferric oxide/graphene oxide composite material is used for treating phenol-containing wastewater; 0.5 to 5 g of the hydroxyl-ferric oxide/graphene oxide composite adsorption material is fed into 1,000 ml of the wastewater with the chlorophenol concentration of 10 to 60 mg/l, and then fully oscillated on a constant-temperature shaking table, the water temperature is controlled to be at 25 DEG C, and after reaction is conducted for 3 h, the wastewater is filtered. Detection shows that the chlorophenol removal rate is 87 to 93.2 percent, the chlorophenol concentration of discharged water is 1.3 to 5.2 mg/l, and the adsorption amount is 11 to 17.4 mg/l.

The invention provides a molecular blot absorbent of a SiO2 particle surface in a water phase system and a preparation method thereof, which overcomes the defects of low identification ability and low service life caused by mismatched solvent polarity or by using toxic organic solvent in synthesis in the prior art. The preparation method is provided with the following steps: firstly, activating treatment is adopted to SiO2 particles, and the particles react with a functional monomer and target phenolic pollutants such as one of chlorophenols or nitrophenol to form a complex type precursor body; the molecular blot absorbent of the SiO2 particle surface is obtained through polymerization and post treatment after the re-oxidation. The molecular blot absorbent of the invention is simple in preparation technique and low in cost; the absorbent has high selectivity in target molecules, a fast balancing speed in absorption and de-sorption and can be repeatedly used.

The invention relates to a preparation method and use for 2, 4-di-chlorophenol artificial antigen. It is synthesized by hapten 2, 4-dichlor-6-(4-hydroxyl phenyl azo) phenyl hydroxide through activating fat or admixing acid anhydride. The antigen can be used to make 2, 4-di-chlorophenol antibody, set 2, 4-di-chlorophenol indirect competing fluorescence immunity method, or testing its residuum in the aquatic environment. The advantages of the invention are that the antibody has great practicability and good stability; the preparation method is easy and feasible; the cost is low; and it is easy to produce in industrial scale.

The present invention provides a chlorophenol-containing wastewater treatment technology by ultrasonic ozonation, wherein a stainless steel ultrasonic wave reaction tank is adopted, the ozone contacts with the waste water through a pore diffuser fixed at the bottom of the reaction tank, the chlorophenol of the waste water is removed under the condition of a sound wave frequency of 40 kHz, a sound energy density of 50~150 W/L, a ozone amount of 10~30 mg/L.h, a pH value of 8.0~8.2 and a water power residence time in the tank of 60~90 min. In the present invention, by optimizing the technological parameters, the purpose of lower energy consumption, high removing efficiency is realized, and the technology is adapted to the practical chlorophenol-containing wastewater treatment and has excellent market development prospect.

The invention relates to a catalytic hydrodechlorination Pd-M/NOMC catalyst and a preparing method and application thereof. According to the catalyst, with synthetic-nitrogen-doped mesoporous carbon being a carrier, the active component is Pd-M. A one-step synthesis method is adopted to prepare a nitrogen-doped mesoporous carbon catalyst, an impregnation method can be adopted to synthesize the Pd-M/NOMC catalyst, and hydrogen, formic acid-sodium formate, methyl alcohol and the like are adopted as hydrogen sources for hydrodechlorination of chlorophenol. Nitrogen atoms are doped on a mesoporouscarbon material, the reactive site of catalysis is increased, and the activity of the catalyst is improved. The one-step method for synthesis is adopted, the nitrogen sources can be controlled from the source, the content of added nitrogen is easier to control, and the formed mesoporous structure is not easily damaged; by introducing nitrogen, the lowest binding energy position of palladium is migrated, electrons in nitrogen are migrated to the surface of palladium atoms, which improves the stability between palladium and the material.

The invention discloses a preparation method of 3,5-dimethyl-4-chlorophenol, which takes tetrachloroethylene as a solvent, benzyl thiophenol and aluminium chloride as cocatalysts, sulfuric chloride as a chloridizing agent, orientation chlorination is carried out through two phases of low-temperature chlorination and high-temperature chlorination, the mass ratio of tetrachloroethylene to MX is 0.5-4: 1; the mass ratio of the cocatalyst to MX is 2.5-6.5:1000; at low temperature chlorination phase, the mass ratio of sulfuric chloride dropping amount to MX is 0.9-1.2: 1; at high temperature chlorination phase, the mass ratio of sulfuric chloride dropping amount to MX is 0.1-0.2: 1; the temperature at the low temperature chlorination phase is controlled at 30-45 DEG C, chlorination is carried out for 4-6 hours; the temperature at high temperature chlorination phase is controlled at 50-65 DEG C, and chlorination is carried out for 1-2 hours, insulation reaction is carried out after the dropping process of sulfuric chloride is completed, tail gas is removed for 1-2 hours, and steps of water-washing layering, cooling and crystallizing, centrifuging and washing, and drying to obtain the product. According to the method, the conversion rate can reach more than 95%, finished product PCMX yield is increased, and the by-product can be effectively reduced.

The invention discloses a nanofiber cellulose-based hydrogel loaded metal catalyst for degrading trichlorophenol in a water body and a preparation method of the catalyst. The preparation method comprises the following steps: (1)adding a nanofiber suspension, a polyvinyl alcohol solution and a carboxymethyl cellulose solution, performing water bath heating; (2) adding glacial acetic acid and a glutaraldehyde solution to perform reaction; (3) performing vacuuming treatment, centrifuging, performing freeze thawing circulation, slicing, and drying; (4) soaking in a salt solution containing Fe<2+>, and performing reaction; (5) soaking in a sodium borohydride solution, and performing reduction; (6) soaking in a potassium chloropalladate solution, and performing reaction; (7) washing with anaerobic water, and performing vacuum drying, so as to obtain the nanofiber cellulose-based hydrogel loaded metal catalyst. The hydrogel loaded metal catalyst disclosed by the invention has an efficient and thorough reduction and degradation property on trichlorophenol and chlorophenol compounds in wastewater, has very good adsorption on trichlorophenol, is capable of treating a relatively small amount of trichlorophenol in the water body, and has a very good effect.

The invention relates to a preparation method and use for 2, 4, 6-tri-chlorophenol artificial antigen. It is synthesized by hapten 2, 4, 6-trichlorobenzende oxygen acetic acid through activating fat or mixing acid anhydride. The antibody can be used to make 2, 4, 6-tri-chlorophenol antibody, set 2, 4, 6-tri-chlorophenol indirect competing fluorescence immunity method, or testing its residuum in the aquatic environment. The advantages of the invention are that the antibody has great practicability and good stability; the preparation method is easy and feasible; the cost is low; and it is easy to produce in industrial scale.

The invention relates to a preparation method and an application of a polypyrrole-multiwalled carbon nanotube collaboratively-modified palladium-carried composite electrode and belongs to the technical field of electrochemical water treatment. The method comprises the following steps of: firstly ultrasonically dispersing carbon nanotubes after being pretreated into a volatile organic solvent to form carbon nanotube suspension liquid, soaking and lifting a Ti (titanium) net in the suspension liquid, and naturally drying the Ti net to ensure that the carbon nanotubes are dispersed on the surface of the Ti net; carrying out the electrochemical oxidization polymerization in a Py (polypyrrole) sulfuric acid solution to form polypyrrole, so as to obtain a polypyrrole-multiwalled nanotube modified membrane; finally electrically depositing Pd (palladium) in a PdCl2 solution to obtain the polypyrrole-multiwalled carbon nanotube-modified Pd-carried composite electrode. The electrode is used for electrically catalyzing and reducing chloride of chlorophenol in the water. Compared with a Pd/Ti electrode with no modified layer, the research shows that the electrode can rapidly and high-efficiently remove 2, 4-dichlorophen and pentachlorophenol and has universality. The prepared electrode is high in catalytic activity, good in stability, rapid and high-efficient for electrically catalyzing the chlorophenol in the water and promising in application prospect.

The invention relates to an immobilized enzyme catalyst-an electrospinning polylactic acid immobilized laccase used for decomposing chlorophenols pollutants in the environment and a preparation method thereof. The immobilized laccase takes a HMW (high molecular weight) polylactic acid as a vector and immobilizes the laccase on the vector through chemical bonding and cross bonding. The preparation method thereof includes two steps of the composing of the vector and the immobilizing of the laccase. The composing of the vector takes a high voltage static electrospinning technology for preparing an organic liquid containing the polylactic acid into a non-spinning fiber membrane with a fiber diameter of nanometer grade; the immobilizing of the laccase is to mix the vector with the laccase which react in a cushion liquid with the pH value equal to 4.01 for obtaining the immobilized laccase at the temperature of 4 DEG C; and then the immobilized laccase is washed and dried for obtaining the finished product of the immobilized laccase. The invention provides the novel immobilized laccase catalyst which has the advantages of good stability, high activity, convenient preparation and fast arranging.