57 results about "4-chlorophenol" patented technology

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 relates to a process for preparing 2,4-dichlorphenoxyacetic acid with high quality; and the process comprises the following steps of: using phenol as a raw material; first chlorinating the phenol so as to prepare 2-chlorophenol, 4-chlorophenol and 2,4-chlorophenol; separating out the 2-chlorophenol through rectifying; further chlorinating the 4-chlorophenol to obtain 2,4-dichlorophenol immediate with mass percentage of not less than 98%; and under an alkaline condition, reacting the 2,4-dichlorophenol immediate with chloroacetic acid, so as to obtain 2,4-dichlorphenoxyacetic acid with mass percentage of not less than 98%. Compared with the prior art, the process for preparing 2,4-dichlorphenoxyacetic acid with the high quality, provided by the invention, has the advantages as follows: the 2,4-dichlorphenoxyacetic acid (98%) with high quality is obtained; meanwhile, untransformed 2,4-dichlorophenol is recycled through solvent extraction and is recycled as reaction raw material for the next reaction through being neutralized and alkalified; therefore, the environment friendly process for preparing the 2,4-dichlorphenoxyacetic acid with high quality and high yield is provided.

The invention relates to a synergistic effect of multiple bacterial strains on degradation of polyphenol pollutants and a research method thereof. According to the invention, a bacterial suspension is prepared from one or a mixture of two or three selected from the group consisting of pseudomonas aeruginosa GIMT1.074, sphingobacterium multivorum CICC 23249 and ochrobactrum sp. BJS2; then the bacterial suspension is inoculated to inorganic a salt medium containing phenol, meta-cresol and 4-chlorophenol with different concentrations for culture; parts of a culture solution are taken out at different time intervals to measure concentrations of phenol, meta-cresol and 4-chlorophenol in the culture solution so as to determine degradation rates at different times, and cell concentrations in the culture solution are measured to investigate growth conditions of different cells. According to research on synergistic degradation effects of the three phenol degrading bacteria, a mixed bacterial strain has superior capability in degradation of mixed phenolic pollutants and has much better degradation efficiency and effects compared to every individual bacterial strain; moreover, biomass of the mixed bacterial strain is increased to two times of the biomass of an original optimal bacterial strain, i.e., the pseudomonas aeruginosa GIMT1.074.

The invention relates to a catalyst and a preparation method thereof, and particularly relates to a catalyst for treating chorine-containing organic matters in water and a preparation method thereof. According to the catalyst for treating chorine-containing organic matters in water, active components comprise four metals, namely bismuth, palladium, platinum and ruthenium, a carrier is a titanium dioxide/activated carbon composite carrier, and 0.15% of polytetrafluoroethylene is contained on the surface of the catalyst. The invention further provides a method for preparing the catalyst, the catalyst is adopted for removing 4-chlorophenol in wastewater by adopting an electrochemical reduction and oxidation combination method, and tests prove that by adopting the catalyst of the embodiment, the conversion rate of the 4-chlorophenol in the wastewater can achieve 100%, the dechlorination rate can achieve 100%, the removal rate of total organic carbon (TOC) can achieve 88.7%, and the catalyst further has great activity.

The invention discloses a preparation method of a nano cuprous oxide photocatalyst, the preparation method comprises the following steps: 1) sequentially adding a CuCl2 solution and a NaOH solution into a certain amount of deionized water; 2) adding surfactant SDS (sodium dodecyl sulfate) under vigorous stirring, performing ultrasonic treatment, adding NH2OH.HCl drop by drop, performing room temperature aging, centrifuging, washing and drying to obtain orange-yellow Cu2O powder. The nano cuprous oxide photocatalyst has a particle diameter of 200-300nm, and can absorb visible light of less than 600nm. Under simulate visible light source irradiation, a 4-chlorophenol degradation photocatalytic reaction is used for evaluation of the catalyst activity, and the nano cuprous oxide photocatalyst can remove about 90% of 4-chlorophenol (the initial concentration is 12.8mg / L) in water within 2 hours. The nano cuprous oxide prepared by the method is a low energy gap photocatalyst with a high solar utilization rate, is used for degradation of chlorophenol pollutants, and has very important practical significance.

The invention discloses a method for green, efficient and selective synthesis of chlorphenesin. Glycerol and 4-chlorophenol directly serve as raw materials, diethyl carbonate serves as a selective synthesis agent, separate synthesis can be performed in situ, orientation reaction is ensured, other by-products are omitted, separation and purification are simple, yield is 95% under proper conditions,and purity is 99.5% or more. The yield of the chlorphenesin is greatly improved, high-toxic and expensive 3-chlorine-1, 2-propanediol is abandoned by the aid of low-cost and non-toxic glycerin, reaction conditions are mild, and industrial production is facilitated.

The invention relates to a magnetic recyclable copper tetranitrophthalocyanine composite catalyst and application thereof in a phenolic pollutant chromogenic recognition reaction. The composite catalyst comprises an amorphous carbon membrane layer-coated ferroferric oxide magnetic carrier and copper (II) tetranitrophthalocyanine which is loaded on the surface of the carrier and has an 'island shaped' nano-structure. The catalyst is low in cost, non-toxic and harmless, has a stable physical property, integrates with chemical catalyzing and magnetic recycling functions into a whole, and can be used repeatedly. The composite catalyst serving as a catalyst is used for catalyzing multiple phenols, such as phenol, 2-chlorophenol, 4-chlorophenol and 2,4-chlorophenol, in an aqueous solution to carry out a chromogenic reaction with 4-amino antipyrine. The composite catalyst has the advantages of high chromogenic speed and low cost and is easy to operate, the catalytic reaction can be quickly performed at room temperature only by means of the contact among the catalyst, an oxidant and a substrate without illuminating or heating, and the catalytic reaction process is green, safe and easy to control.

The invention discloses preparation and application of a fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer and belongs to the technical field of functional materials. A preparation method includes: compositing graphene oxide with a magnetic material; modifying the surface of a composite with fluorescent quantum dots; adopting molecular imprinting technology to prepare the fluorescent magnetic graphene oxide based 4-chlorophenol molecularly imprinted polymer has specific recognition capability to 4-chlorophenol template molecules. The molecularly imprinted polymer is large in specific surface area and recognition site number, high in mass transfer rate and excellent in selective adsorption performance. The molecularly imprinted polymer can be quickly separated from complex matrixes under action of a magnetic field and can be applied to fluorescent detection specific to 4-chlorophenol; when serving as a solid phase extraction agent, the molecularly imprinted polymer can be used for specifically gathering and detecting trace 4-chlorophenol. The method is high in gathering multiple and low in detection limit, thereby having high extraction capability and efficiency.

The invention provides a bismuth titanate/bismuth oxide photocatalyst and a preparation method thereof. The bismuth titanate/bismuth oxide photocatalyst is prepared from a Bi2Ti2O7 sheet layer and a gamma-Bi2O3 carrier; the Bi2Ti2O7 sheet layer and the gamma-Bi2O3 carrier are perpendicular to each other. According to the bismuth titanate/bismuth oxide photocatalyst, the bismuth oxide and the bismuth titanate can form a type II heterojunction, and the photocatalytic activity of the bismuth titanate/bismuth oxide photocatalyst is improved. The results of examples show that the bismuth titanate/bismuth oxide photocatalyst has a degradation rate of 90% for 4-chlorophenol and a degradation rate of 100% for rhodamine B and methyl orange.

The new method for measuring chlorophenol in high susceptiveness and selectivity is built based on chemiluminescent phenomena generated from reaction between photolyzed chlorophenol and oxidant when fluorescent agent exists. Triton X-100 as sensitization agent can enhance luminous intensity of the system effectively. The method gives out favorable luminescence response for multiform chlorophenol including 4-chlorophenol, 2-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, and pentachloro phenol. Detection limit reaches to 5.0*10-8mol/L. Relative standard deviation of measuring 2,4-dichlorophenol 2,4,6-trichlorophenol in 3.6*10-5mol/L for 7 times is 2.2%. Relative standard deviation of measuring 2,4,6-trichlorophenol in 3.6*10-5mol/L for 7 times is 1.9%. The method carries out experiments for selected multiple possible interfering materials. Results of the experiments indicate that it is lesser interference between each chlorophenol under different pH values.

The invention discloses a method for preparing 2-acetamido-6-acetylphenol. In the method, 2-amino-4-chlorophenol is taken as a main starting material, and the 2-acetamido-6-acetylphenol is prepared through acylation reaction, rearrangement reaction and hydrogenation reaction. The method comprises the following steps: a. acylation reaction: carrying out acylation reaction between the 2-amino-4-chlorophenol and acetyl chloride in a solvent to generate an intermediate I; b. rearrangement reaction: adding the intermediate I, AlCl3 and a cosolvent to a vessel, heating for reacting to generate an intermediate II, and extracting the purified intermediate II; and c. hydrogenation reaction: adding the intermediate II, Pd/C, an acid binding agent and a solvent to the reaction vessel, heating and introducing hydrogen, reacting to obtain the target product, and extracting and purifying the target product. The method has the advantages of wide and available raw material source, short synthetic route, low cost, less pollution and the like, and is applicable to large-scale production.

The invention discloses a Sn-GAC particle. The particle is a supported Sn-GAC particle prepared by loading and modifying granular active carbon on Sn metal ions through an impregnation technology. A bipolar three-dimensional electrochemical reactor is constructed by the supported Sn-GAC particle used as a particle electrode, a dimensionally stable anode (DSA) electrode used as an anode and a titanium plate used as a cathode, and a three-dimensional electrochemical reaction is carried out under the action of electrochemical oxidation to finally degrade 4-chlorophenol into carbon dioxide and water. When the Sn-GAC particle is used to treat 4-chlorophenol wastewater, the 4-chlorophenol removal rate can reach 90% or more. The particle disclosed in the invention has the advantages of simple preparation technology, repeated use, great reduction of the 4-chlorophenol wastewater treatment cost, and improvement of the 4-chlorophenol treatment efficiency.

The invention discloses Sn/Sb-Mn-GAC particles. The particles are supported Sn/Sb-Mn-GAC particles prepared by supporting modified granular activated carbon onto metal ions such as Sn, Sb and Mn through an impregnation method. The method comprises the following steps: taking the supported Sn/Sb-Mn-GAC particles as a particle electrode, taking a dimensionally stable anode DSA as an anode, taking atitanium plate as a cathode, constructing a bipolar type three-dimensional electrochemical reactor, carrying out a three-dimensional electrochemical reaction under an electrochemical oxidation effect,and finally degrading 4-chlorophenol into carbon dioxide and water. The 4-chlorophenol wastewater is treated by using the Sn/Sb-Mn-GAC particles, so that the removal rate of the 4-chlorophenol can reach 99% or higher. Meanwhile, the particle preparation process is simple, the particles can be repeatedly used, the treatment cost of the 4-chlorophenol wastewater is greatly reduced, and the treatment efficiency of the 4-chlorophenol wastewater is improved.

The invention provides a preparation method of eltrombopag intermediate 2-hydroxy-3-(m-carboxyl phenyl)aniline. According to the preparation method, 2-amino-4-chlorophenol is taken as a raw material,urea is adopted for protection, bromination, benzylation, Suzuki coupling reaction, hydrolysis deprotection of urea protection, hydrogenation dechlorinating and debenzylation are carried out so as toobtain 2-hydroxy-3-(m-carboxyl phenyl)aniline. Compared with the prior art, the advantages are that: operation is simple; conditions are mild and easily controllable; the preparation method is safe, and is friendly to the environment; yield is high; and the preparation method is suitable for industrialized large scale production.

The invention provides a method for preparing chlorzoxazone. A synthetic method of first performing hydrolysis and then performing hydrogenation reduction and cyclization one-pot reaction and generating chlorzoxazone through two-step reaction in total is adopted. A hydrolyzate is obtained mainly by heating and hydrolyzing raw material 2,5-dichloronitrobenzene in super-saline water solution. After filtration and drying, 4-chloro-2-nitrophenol with the purity larger than 99% can be obtained. The whole synthetic route has two steps in total, the second step integrates reduction reaction and cyclization reaction, and not only is the overall yield effectively improved, but also the reaction period is shortened. The retention time of 2-amino-4-chlorophenol is reduced, and a separated compound is protected from oxidative deterioration.

The invention belongs to the field of electrochemical detection, and particularly provides a construction method of a photoelectrochemical sensor for non-labeling detection of 4-chlorophenol. The construction method comprises the following steps that step 1, graphite-phase carbon nitride (GCN) is prepared; step 2, an Ag/GCN/carbon sphere (Ag/GCN/C) ternary photoelectric active material is prepared; step 3, the photoelectrochemical sensor for the non-labeling detection of 4-chlorophenol is constructed. Compared with a traditional detection method, a photoelectrochemical detection method of 4-chlorophenol has the advantages that the operation is simpler, more convenient and more flexible, instrument and equipment are simpler, the reagent dose is less, and the detection cost is low.

The invention provides a spherical porous adsorbent based on carbon nanotubes as well as a preparation method and application of the spherical porous adsorbent. The spherical porous adsorbent based on the carbon nanotubes is prepared by adopting an inverse phase suspension polymerization method, treating by a cross linking agent and an initiator to compound the multi-wall carbon nanotubes and beta-cyclodextrin, and carrying out high-temperature calcination. The obtained spherical porous adsorbent has the characteristics that the grain diameter is 0.5mm to 1.4mm, the specific surface area is 85.8m<2>/g to 332.1m<2>/g, the average diameter of pores is 6.4nm to 29.0nm, and the total pore volume is 0.183cm<3>/g to 0.533cm<2>/g; the spherical porous adsorbent has relatively good adsorption performance on an organic pollutant 4-chlorophenol, and the adsorption capacity is 56.7mg/g to 105.2mg/g; the spherical porous adsorbent can be used as an absorption material for the 4-chlorophenol in wastewater.

The invention provides SnO2-GAC particles and a preparation method and an application thereof and belongs to the technical field of material chemistry particles. The SnO2-GAC particles are supported particles prepared with a microwave method and modified with transition metal oxide SnO2 in situ with abundant waste crop materials in Guangxi, SnCl4.5H2O as a modifier and caustic alkali as an activator. The particles are uniformly supported, modifying substances are not prone to falling during electrochemical treatment of wastewater, and the removal rate of 4-chloropheol can reach 95% or above when the particles are used as a particle electrode to treat 4-chlorophenol wastewater in 3D electrochemical reactions. The tretament efficiency of 4-chlorophenol wastewater is improved.

A process for producing 2-(2-(4-chlorophenoxy)phenyl)acetic acid [II] through reaction of 2-chlorophenylacetic acid [I] with 4-chlorophenol.

The invention belongs to the technical field of semiconductor photocatalysis and relates to a preparation method for a silicon photocatalyst with a 3D multilevel structure. A silicon pillar array is subjected to a cleaning process and then is etched under the water bath temperature at 30 DEG C. The multi-level silicon is acquired by regulating the etching time. The light absorption strength of the prepared multi-level silicon is high; the light current is -30mAcm<2> and is 7.5 times of the light current of the silicon pillar array; 4-chlorophenol is dechlorinated under the photoelectric combined action; the dechlorinating efficiency can reach 90% or more after reacting for 60min; high-efficient photoelectric catalytic capacity is represented; the preparation method has the advantages of mild reaction condition, simple and convenient preparation technique, low cost, short preparation period, easy control, and the like; the prepared multi-level silicon photocatalyst can effectively enhance the light absorption of the material, reduce the light reflection, increase the light absorbing efficiency, boost the separation of photoproduced electron and hole and increase the photocatalytic activity; the effect in photoelectrocatalytic dechlorinating is obvious.

The invention belongs to the field of electrochemical detection of chlorophenol substances using an electrostatic spinning fiber immobilized enzyme electrode, and relates to preparation of a laccase electrode with response to chlorophenols and the detection of the chlorophenol substances by using the electrode. Particularly, environment-friendly macromolecular polymer polyvinyl alcohol is used asa raw material, and the laccase electrode is prepared by performing laccase immobilization by in-situ electrostatic spinning technology. The immobilized laccase electrode has response to 2,4-dichlorophenol, 4-chlorophenol, 2-dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol with low concentration; and the detection of the chlorophenol substances can be performed according to the position of reduction current peak of the response of the laccase electrode.

The invention belongs to the field of coatings, and in particular relates to a coating capable of decomposing formaldehyde and releasing negative ions, wherein the coating comprises 1-1.5 wt% of a negative ion additive, 0.5-1.5 wt% of titanium dioxide and 97-98 wt% of a coating substrate; the titanium dioxide is a mixture of Fe<3+>-doped nano titanium dioxide, Pt<4+>-doped nano titanium dioxide and N-doped nano titanium dioxide, and the mixture can degrade the formaldehyde, dichloroacetic acid and 4-chlorophenol under visible light conditions; and negative ion additives are added to effectively remove a gas in air.