30 results about "2-dichlorobenzene" patented technology

The invention relates to a europium rare earth metal-organic frame material and a preparation method and application thereof. The chemical formula of the product is {[Eu2(L)3(DMF)2]}n. The preparation method comprises the following steps: adding 5-(4-hydroxy-1,2,4-triazolyl)-4-benzene-1,3-dicarboxylic acid and europium chloride hexahydrate into a mixed solution of methanol and DMF, and stirring uniformly to obtain a mixed solution; then charging the mixed solution into a polytetrafluoroethylene lined hydrothermal synthesis high-pressure reaction kettle, cooling and filtering after reaction to obtain colorless bulk crystals; and then repetitively washing the colorless bulk crystals with the mixed solution of methanol and DMF to obtain the metal organic frame material. The europium rare earth metal-organic frame material has the advantages of simple preparation process, mild reaction conditions, high yield and low cost; and at room temperature, chlorobenzene, 1,2-dichlorobenzene, 1,2,4-trichlorobenzene, 1,2,3,4-tetrachlorobenzene, 1,2,4,5-tetrachlorobenzene, pentachlorobenzene and hexachlorobenzene have different degrees of fluorescence quenching responses on the material, and the material has good application prospects in environmental monitoring.

The invention discloses ochrobactrum ZJUTCB-1 capable of efficiently degrading chlorobenzene and application of the ochrobactrum ZJUTCB-1. Organic pollutants include toluene, p-xylene, the chlorobenzene and 1, 2-dichlorobenzene or n-hexane. A method for applying the ochrobactrum ZJUTCB-1 includes inoculating the ochrobactrum ZJUTCB-1 into inorganic salt culture solution; adding the organic pollutants into the inorganic salt culture solution; carrying out degradation reaction under the conditions of the temperature of 25-35 DEG C, the rotational speed of 160 rpm and the pH (potential of hydrogen) of 6-8; degrading organic matters. The ochrobactrum ZJUTCB-1 and the application have the advantages that the chlorobenzene and other industrial common organic pollutants such as the toluene, the p-xylene, the 1, 2-dichlorobenzene and the n-hexane can be degraded by the ochrobactrum ZJUTCB-1; the chlorobenzene in industrial wastewater and waste gas can be efficiently purified by the ochrobactrum ZJUTCB-1, and the ochrobactrum ZJUTCB-1 is little in pollution, easy to popularize and low in purification cost.

A method of forming graphene nanostripes includes providing a substrate comprising at least one of copper foil or nickel foam and subjecting the substrate to a reduced pressure environment in a processing chamber. The method also includes providing methane gas and 1,2-dichlorobenzene (1,2-DCB) gas, flowing the methane gas and the 1,2-DCB into the processing chamber, and establishing a partial pressure ratio of 1,2-DCB gas to methane gas in the processing chamber. The partial pressure ratio is between 0 and 3. The method further includes generating a plasma, thereafter, exposing the at least a portion of the substrate to the methane gas, the 1,2-DCB gas, and the plasma, and growing the graphene nanostripes coupled to the at least a portion of the substrate.

The invention discloses a method for catching and detecting static headspace gas chromatography electrons of eleven chlorobenzene compounds in water, which belongs to the field of a water pollution detection technology. Eleven chlorobenzene compounds are as follows: 1, 4-dichlorobenzene, 1, 3-dichlorobenzene, 1, 2-dichlorobenzene, 1, 3, 5-trichlorobenzene, 1, 2, 4-trichlorobenzene, 1, 2, 3-trichlorobenzene, 1, 2, 3, 4, 5-tetrachlorobenzene, 1, 2, 4, 5-tetrachlorobenzene, pentachlorobenzene and hexachlorobenzene. According to the method, a water sample containing 20% of sodium chloride is added into a 20mL of headspace bottle, an aluminium cover containing PTFE (polytetrafluoroethylene) is utilized to seal instantly, and 800 [mu] L of gas in a top space of the headspace bottle is taken to detect in a gaschromatograph after the headspace bottle added with the water sample is balanced with the vibrating speed of 500rpm for 30 min at 70 DEG C. A detection limit of the eleven chlorobenzene compounds is 0.0002-0.04 [mu] g/L, and the recovery rate is 83-116%. The method provided by the invention is environmentally friendly, free of organic solvent, simple to operate, wide in linear range, good in repeatability, high in recovery rate and is capable of quickly detecting the concentration of the chlorobenzene compounds in water.

A method for preparing hydrophobic gold nanoparticles includes adding 1,2-dichlorobenzene as a solvent to gold precursor and using oleylamine and oleic acid with volume ratio of 7.5:2.5 to 5:5 as surfactants. The size of the prepared gold nanoparticles can be controlled over a broad range and may be utilized in various fields such as bio-imaging, photonic crystallization, sensors, organic catalysts, surface enhanced raman spectrum, electronic devices, etc. Further, a method for colorimetric detection of a strong acid uses hydrophilic nanoparticles that are phase transited from the prepared hydrophobic gold nanoparticles. Up to 5 ppm of low content hydrochloric acid can be detected utilizing phase transited hydrophilic nanoparticles in the colorimetric detection method, and the gold nanoparticles that were used in the detection of strong acid can be reused without loss of activity through neutralization with bases.

A rapid identification method of the aroma quality of minced mutton comprises the following steps: 1, extracting volatile components in the minced mutton through headspace solid-phase microextraction;2, performing chromatography and mass spectrometry; 3, scoring by using different characteristic aromas as sensory attributes; 4, comparing the chromatographic peak value with an NIST spectrum library and a Wiley spectrum library, and calculating the KI value of a test object when SI is greater than 800 and smaller than 1000 by using a normal alkane mixture of C8-C24 as a standard; 5, comparing the chromatographic peak area with the chromatographic peak area of 1,2-dichlorobenzene, and calculating the relative content; 6, identifying characteristic aroma components by a partial least square regression method. By the rapid identification method, through combination of a solid-phase microextraction technology, a GC-MS technology, a GC-O technology and sensory analysis, the aroma componentsin the minced mutton can be rapidly identified, and thus the aroma quality thereof is identified so as to avoid mutton adulteration.

The invention provides a water-induced phase separation light-induced atom transfer radical polymerization (ATRP) system based on iridium salt catalysis under blue light irradiation, and an iridium salt catalyst recycling method. The method comprises the following steps: (1) taking polyethylene glycol monomethyl ether methacrylate as a model monomer, taking ethyl alpha-bromophenylacetate as an initiator, taking a surface tris[2-phenylpyridinato-C2,N]iridium as a catalyst, and taking 1,2-dichlorobenzene/ethanol as a mixed solvent; (2) adding purified water into a polymerization system to inducephase separation after polymerization, so that the iridium salt catalysts easily realize in-situ separation to be recycled; and (3) adding novel monomers and initiators into the recycled catalyst solution so as to perform the next-round polymerization. The sustainable light-controlled ATRP system has the characteristics of visible light radiation, high catalytic activity, good controllability ofmolecular weight and distribution, attractive 'activity' features, high-efficiency separation ability, low metal residue content, reutilization of the catalyst and the like.

The invention discloses a low-cost composite fluorescent nano-fiber thin film with high selectivity for detecting TNT as well as the preparation method and the application of the low-cost composite fluorescent nano-fiber thin film, and particularly provides a composite fluorescent nano-fiber thin film, wherein poly (n-isopropylacrylamide) (PNIPAM) is adopted as the matrix of the composite fluorescent nano-fiber thin film and the 9-(pyrenyl-1-yl)-9H-carbazole (PyCz) is adopted as the fluorescent group of the composite fluorescent nano-fiber thin film. The nano-fiber thin film is applied to thefield of explosive detection for the first time. Due to the fact that a large number of amide groups are arranged on a PNIPAM molecular chain, the interaction between hydrogen bond reinforcement and TNT can be formed by virtue of the PNIPAM molecular chain together with TNT. The fiber can be used for identifying 2, 4 and 6-trinitrotoluene (TNT) steam in a low-cost, high-sensitivity and high-selectivity manner. However, the fiber has no obvious response to naphthalene, urea, toluene, 1,2-dichlorobenzene, sodium nitrite, cigarettes and the like.

The invention belongs to the technical field of detection methods, and discloses a five-wavelength ultraviolet spectrum method for evaluating reduction performance of metal catalysis reductant. The method includes the steps of 1, absorbancy-wavelength standard curves of 1,2-dichlorobenzene, chlorobenzene and benzene are drawn; 2, the characteristic absorption wavelength is determined according to the standard curves, and the absorbancy-concentration standard curve of all the substances at the characteristic wavelength position is drawn to determine the extinction coefficient; 3, a mathematical formula is set up; 4, the metal catalysis reductant is added into simulation wastewater containing 1,2-dichlorobenzene to react in a contact mode and stands, supernate is taken and scanned in a full-wavelength range, light absorption values at the 260 nm, 269 nm, 277 nm, 290 nm and 300 nm positions are recorded, the concentration of dichlorobenzene, chlorobenzene and benzene in the simulation wastewater is calculated, the reduction capacity of the catalysis reductant and the catalysis effect of the catalysis reductant under different reaction conditions are evaluated. The method is simple and capable of fast evaluating reduction performance of metal catalysis reductant.

The invention discloses a synthesis method for 2-chlorobenzene methyl formate. According to the method, 1,2-dichlorobenzene, N,N-dimethyl formamide and tetraethyl ammonium iodide, tetraethyl ammonium bromide, tetraethyl ammonium chloride, tetraethyl ammonium fluoborate, tetrabutyl ammonium iodide, tetrabutyl ammonium bromide or tetrabutyl ammonium chloride are mixed to form electrolytes, carbon dioxide is guided into the electrolytes for 30 minutes at normal pressure, electrocarboxylation is carried at constant currents, and then the 2-chlorobenzene methyl formate can be obtained through esterification and postprocessing. Compared with the prior art, the method has the advantages of being simple, convenient to operate and safe; the carbon dioxide with the greenhouse effect can be effectively utilized, and therefore atmospheric pollution can be greatly reduced, and the method is of great significance for environmental protection; conversion of aromatic dichlorides and effective synthesis of the 2-chlorobenzene methyl formate are realized; and the raw materials are cheap and easy to obtain, the cost is low, and a new path is created for research on organic matter such challenging and green synthetic halogenated aromatic carboxylic acid derivatives.

The invention provides imidazo[2,1-b]benzothiazole compounds and a synthesis method thereof. According to the technical scheme, a metal catalyst is not needed, imidazo[2,1-b]benzothiazole and derivatives thereof are prepared from 2-benzothiazolamine compounds and ketone through conversion with air or oxygen as an oxidizing agent and one or a mixture of the following components as an organic solvent only under the action of elemental sulfur S8: cyclohexane, toluene, chlorobenzene, 1,2-dichlorobenzene, pyridine, quinoline, triethylamine, NMP, DMF, DMAc, DMSO, 1,4-dioxane and the like. The difficulty that the metal catalyst or a starting material with relatively higher activity is needed in the conventional synthesis method of the imidazo[2,1-b]benzothiazole compounds is overcome, and the compounds are suitable for preparing various functional materials, bioactive molecules and drug molecules.

The catalyst for electrochemical dechlorination of hydrocarbons, such as chlorobenzenes, is a d-block transition metal supported by rice husk ash (RHA), preferably rice husk ash-supported platinum or titanium. The catalysts are prepared from rice husk ash by the sol-gel method. In order to dechlorinate chlorinated organic compounds, such as 1,4-dichlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, and 1,2,4-trichlorobenzene, a capillary microreactor is at least partially filled with the d-block transition metal supported by rice husk ash catalyst, a buffer solution having a pH preferably between 7 and 10, and the chlorinated organic compound. An electrical potential of approximately 3 kV is then applied across the capillary microreactor to initiate the dechlorination reaction.

The invention provides a method, which is characterized in that in a fixed bed device, solid acid is used as a catalyst, 4-phenylbutyric acid is used as a raw material and is dissolved into 1,2-dichlorobenzene according to a certain solid-to-liquid ratio, mixed liquid continuously flows through a catalyst layer after being gasified, the reaction is carried out on a catalyst, and the Alpha-tetralone can be continuously produced. The method solves the problem that in the existing intermittent liquid phase reaction system, the catalyst is easily inactivated and cannot be cyclically used. The gas-solid phase reaction has the advantages that the contact time between reactants and catalysts can be regulated so that the reaction condition is optimized, products generated in the reaction process are continuously separated in the reaction process, and the positive direction proceeding of the reaction is favorably realized. In addition, because the fixed bed catalytic mode is adopted, generated products leave the catalytic bed layer in time in the reaction process, the reaction can be continuously operated, the on-line regeneration can also be carried out when the catalyst is inactivated, and the production efficiency is greatly improved.

The invention provides antibacterial filter paper and a preparation method thereof, relating to the technical field of preparation of filter paper. The preparation method comprises the steps of firstly preprocessing the surface of filter paper by virtue of an amino functional group silane coupling agent, grafting styrene to the surface of the filter paper by taking CuBr/dipyridyl as a catalytic system and 1,2-dichlorobenzene as a solvent, and finally carrying out quaternization on the grafted filter paper by virtue of alkyl bromide, so as to obtain the antibacterial filter paper. The prepared antibacterial filter paper has strong antibacterial funcition and good durability, the defects that the antibacterial components are not uniform and are poor in adhesion property, the use period is short, and the like because formed filter paper is soaked and sprayed with an antibacterial agent in the prior art are overcome, and the antibacterial filter paper has remarkable promotional values.

The present invention relates to a catalyst for removing aromatic halogenated compounds comprising dioxin, carbon monoxide and nitrogen oxide simultaneously and a method for preparing the catalyst, more particularly, a catalyst comprising 0.1 to 5% by weight of vanadium, 1 to 12% by weight of metals in 6A family and 0.1 to 10% by weight of Ag in titania carrier or, alternatively, a catalyst produced by impregnating said catalyst in 0.05 to 1M sulfuric acid solution to carry out acid treatment. The catalyst according to the present invention has improved efficiency for removing 1,2-dichlorobenzene as a reactant model of dioxin and carbon monoxide rather than existing catalysts and also, alternative efficiency for removing nitrogen oxide substantially equal to commonly known catalysts, so that the catalyst can effectively control various air pollutants contained in exhaust gas.

The invention provides a method for preparing benzene-1,2-dithiol. The method includes the steps that metal sodium, ethyl mercaptan and 1,2-dichlorobenzene serve as starting raw materials, two halogen atoms of the 1,2-dichlorobenzene are completely substituted in polar solvents N,N-dimethyl formamide by controlling the molecular proportion of the reactants through the high nucleophilic substitution capacity of sodium thioethylate, 1,2-2 ethyl petrol phenyl sulfide is obtained with the high yield, then sulphur atom deprotection is carried out under the reducing action of the metal sodium and naphthalene, and the target product benzene-1,2-dithiol is produced in an almost-quantitative mode after acidizing is carried out through hydrochloric acid. The preparing method is simple, convenient to operate, low in price and high in yield, and has the broad application prospects in the fine chemical engineering and the pharmaceutical industry.

The invention discloses a synthesis method of 3,4-dichlorobenzonitrile. The synthesis method comprises the following steps of (1) adopting 1,2-dichlorobenzene as a raw material, adding a catalyst A, rising the temperature, then dropwise adding bromine, carrying out heat insulating reaction after the dropwise adding is finished, and carrying out aftertreatment to obtain 3,4-dichlorobromobenzene; (2) after mixing cuprous cyanide, a catalyst B and a solvent, dropwise adding 3,4-dichlorobromobenzene diluent after rising the temperature, carrying out heat insulating reaction after the dropwise adding is finished, and carrying out aftertreatment to obtain the 3,4-dichlorobenzonitrile. The synthesis method disclosed by the invention has the beneficial effects that the 1,2-dichlorobenzene is adopted as the raw material, and after two-step reaction of bromination and cyaniding, the 3,4-dichlorobenzonitrile is obtained, the molar yield can reach 85% or above and the purity is greater than or equal to 98%. The synthesis method disclosed by the invention is low in raw-material cost so as to be suitable for industrial production.

Disclosed is the novel use of some Aza-podophyllotoxin derivatives (AZPs) for modulation of the immune system (immunomodulation), including a method for modulating an immune response comprising administering to a subject an effective amount of at least one Aza-podophyllotoxin derivative of general formula wherein A-ring is selected from the group consisting of 1,3-dioxolane, cyclopentane, 1,4-dioxane, one methoxy, two methoxys, and ethyl; and wherein E-ring is selected from the group consisting of dimethoxyanisole, veratrol, anisole, benzene, syringol, bromobenzene, chlorobenzene, 1,2-dichlorobenzene, 2,3-dimethoxybenzene, 3,4,5-trimethoxybenzene.

The invention provides a synthesis method of dichlorophenol. The method comprises following steps: S1, 1,4-dichlorobenzene is subjected to an alkylation reaction, and 1,4-dichloro-2-cumene is obtained; or 1,3-dichlorobenzene is subjected to the alkylation reaction, and 1,3-dichloro-4-cumene is obtained; or 1,2-dichlorobenzene is subjected to the alkylation reaction, and 1,2-dichloro-4-cumene is obtained; S2, alkyl in 1,4-dichloro-2-cumene, alkyl in 1,3-dichloro-4-cumene or alkyl in 1,2-dichloro-4-cumene is oxidized, and dichloroperoxide with the structure represented as formula x in the description is obtained; S3, dichloroperoxide is subjected to catalytic decomposition respectively, and dichlorophenol and acetone are obtained. A product obtained with the synthesis method of dichlorophenol is high in content, few three wastes are produced, reaction conditions are mild, operation is easy, and the production cost of the product is low.

The invention discloses a method for preparing a 1,2-dichlorobenzene waste gas removal catalyst. The method comprises the following steps: placing chromium-containing waste liquid in a sealed container, and aerating carbon dioxide into the container, so as to obtain carbonated chromium-containing waste liquid; adding ferrous carbonate into the carbonated chromium-containing waste liquid, and performing stirring while sealing, so as to obtain reduced carbonated chromium-containing waste liquid; finally, adding calcium hydroxide into the reduced carbonated chromium-containing waste liquid, performing stirring under a sealed condition until a precipitate is produced, performing solid-liquid separation, and performing thermal decomposition on the solid in an atmosphere furnace, thereby obtaining the 1,2-dichlorobenzene waste gas removal catalyst. According to the method disclosed by the invention, the 1,2-dichlorobenzene waste gas removal catalyst is prepared by recycling the chromium-containing waste liquid, so that harmless disposal of the chromium-containing waste liquid is saved, and a new idea is provided for disposal and utilization of the chromium-containing waste liquid; the problem that carbon monoxide pollution is produced by the traditional 1,2-dichlorobenzene waste gas in a catalytic oxidation process is solved.