244 results about "Trichlorobenzene" patented technology

The invention discloses a disinfection sterilization medical ultrasonic coupling medium with the bactericidal function and used in the ultrasonic detection and treatment of skin and cavitary mucosa and a preparation method of the coupling medium, wherein, the ultrasonic coupling medium comprises propylene glycol, de-ionized water and one viscosity modifier of the hydroxy ethyl cellulose, carbomer and hydroxy propyl cellulose. The coupling medium further comprises a fungicide of 0.05 to 0.15 percent and the constituents of the fungicide are any one of polyhexamethylene biguanide, benzalkonium chloride, benzalkonium bromide, chlorhexidine acetate, trichlorobenzene phenoxy diphenyl ether and nanometer silver or any combination of the olyhexamethylene biguanide, the benzalkonium chloride, the benzalkonium bromide, the chlorhexidine acetate, the trichlorobenzene phenoxy diphenyl etherand, and the nanometer silver; the preparation method used for preparing the ultrasonic coupling medium is as follows: dispersing the hydroxy ethyl cellulose in the propylene glycol, stirring and dispersing the hydroxy ethyl cellulose by adding enough water, heating to 75 to 80 DEG C, preserving the heat for 30 minutes to cool the hydroxy ethyl cellulose and the propylene glycol to 45 DEG C, adding the fungicide to stir and cool the fungicide, the hydroxy ethyl cellulose and the propylene glycol to obtain the filled coupling medium. Tests show that the products of the coupling medium have fast and long sterilization effect and meet the requirements of various related standards.

The invention relates to a heatproof anticorrosion wear resistant powdery paint, a preparation method and an application. The powdery paint comprises the following raw materials by weight: 80-100 parts of phenol novolac epoxy, 25-35 parts of bisphenol A-epoxy resin matrix, 4.0-5.5 parts of dicyandiamide, 80-120 parts of cast stone powder, 10-40 partsof polypropylene, 5-8 parts of graphite, 5-8 parts of component A, 2-5 parts of aluminum hydroxide, 1-3 parts of magnesium oxide, 5-7 parts of ethyl lactate, 1-3 parts of polyvinyl butyral, 5-8 parts of copper oxide, 1-5 parts of carbon nanotube, 0.1-2 parts of 2,4,5-trichlorobenzene sulfonate, 0.2-1 part of potassium perfluorobutanesulfonate and 0.1-0.4 parts of phenylsulfonyl benzene sulfonic acid potassium. According to the invention, phenol novolac epoxy is taken as a base, the bisphenol A-epoxy resin matrix is added, the carbon nanotube is added in the anticorrosion paint, the heatproof and anticorrosion performances of the paint can be enhanced, and the coating process is simple.

The invention relates to an antifouling paint, particularly a biologically-bactericidal acrylic resin and a novel marine antifouling paint composition prepared from the resin. The biologically-bactericidal acrylic resin is prepared from the following raw materials in percentage by mass: 0.35-0.45% of azodiisobutyronitrile, 0.38-0.48% of azodiisovaleronitrile, 0.49-1.2% of dodecamercaptan, 47-50% of butyl acetate, 2.3-3.6% of 2-hydroxyethyl acrylate, 9-10% of trichlorophenyl acrylate, 24-28% of butyl acrylate and 10-13% of isoborneol acrylate. The formula system is free of copper or tin, and thus, is a novel environment-friendly biologically-bactericidal antifouling paint.

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 provides an impact-resistant polypropylene material with high melt strength and a preparation method therefor. The polypropylene material comprises a propylene homopolymer component and a propylene-ethylene copolymer component; the molecular-weight distribution Mw / Mn of the material is smaller than or equal to 10 and is greater than or equal to 4; Mz+1 / Mw is greater than 10 and is smaller than 20; the room-temperature xylene soluble content of the material is higher than 10wt% and is lower than 30wt%; and the ratio of room-temperature trichlorobenzene soluble Mw to room-temperature trichlorobenzene insoluble Mw is greater than 0.4 and is smaller than 1. According to the method provided by the invention, a homopolymerized polypropylene continuous phase, which has a specific melt index and has extremely wide molecular weight distribution, is prepared through using external electron donors of different types and use levels and hydrogen gas of different use levels separately at different polymerization stages, then, propylene and ethylene copolymerization is further carried out so as to obtain a rubber phase, and then, the impact-resistant polypropylene material with high melt strength, high rigidity and high toughness is obtained.

The invention relates to the technical field of analytical chemistry and discloses a method for detecting afatinib dimaleate isomer and main degradation impurities through a high performance liquid chromatography.According to the method, afatinib dimaleate raw materials or preparations are compounded into a detection solution with diluent, bonding amylose-trichlorobenzene carbamic acid ester serves as a stationary phase, a normal hexane-ethanol-organic base solution serves as a mobile phase for isocratic elution, and an HPLC spectrogram is recorded under afatinib absorption wavelength.According to the method, a chromatographic column with trichlorobenzene carbamic acid ester serving as a filling material, the normal hexane-ethanol-organic base solution serves as the mobile phase, the content of isomers existing in afatinib dimaleate and preparations thereof can be measured quantitatively, afatinib, the isomers and the main impurities can be separated completely, the peak pattern is good, the method meets the specifications in Chinese Pharmacopoeia, quality of afatinib dimaleate and afatinib dimaleate preparation products is effectively controlled, and the method is great in specificity, high in sensitivity and good in accuracy.

The invention discloses a method for extracting lithium isotopes. A chelating agent and a diluent are prepared into an extractive organic phase, and the lithium isotopes are extracted from and separated out of a lithium salt water phase. Hydrophobic ionic liquid with a crown ether structure is adopted as the chelating agent and composed of positive ions and negative ions, wherein positive ions with a structural formula I and / or a structural formula II are adopted as the positive ions. One or more of PF6<->, (SO2CF3)2N<->, (SO2CF2CF3)2N<-> and BF4<-> is / are adopted as the negative ions. One or more of kerosene, octanone, chloroform, dichloromethane, carbon tetrachloride, tetrachloroethylene, nitrobenzene, methylbenzene, dimethylbenzene, diethylbenzene, bromobenzene, anisole, nitromethane, 2-methylcyclohexanone, methylisobutylketone, chlorobenzene, dichlorobenzene, trichlorobenzene and diphenyl ether is / are adopted as the diluent. The method has the advantages of being safe, green, efficient and good in stability and can be used for multi-stage enrichment and separation of the lithium isotopes.

The invention discloses a method for preparing isoconazole nitrate, and relates to the field of pharmaceutical chemicals. The method comprises the following steps of: catalyzing a raw material of trichloroacetophenon by using a reduction catalyst to obtain 1-(2,4-dichlorophenyl)-2-chloro-ethanol, performing N-alkylation reaction on the 1-(2,4-dichlorophenyl)-2-chloro-ethanol and imidazole to obtain an intermediate of 1-[2-(2,4-dichlorophenyl)-2-hydroxyethyl]imidazole, etherifying the intermediate and 2,6-dichlorobenzyl chloride, acidizing by using nitric acid for salt formation to obtain crude isoconazole nitrate, and recrystallizing and purifying to obtain the isoconazole nitrate. The catalyst different from the traditional catalyst is used, so that the method is easy to implement, low in cost and high in yield.

The invention discloses a preparation method of a heat-resistant oxygen-resistant polyester film. The preparation method is characterized by including the steps of preparation of hydroxy thiophenol containing compounds, preparation of sulfur-containing hindered phenol antioxidants, polyester synthesis and film processing. The preparation method includes: using 4-hydroxy benzyl thiophenol sodium, 1, 3, 5-trichlorobenzene, 1, 3, 5-tribromobenzene and 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine to synthesize the hydroxy thiophenol containing compounds, namely, 1, 3, 5-tri(4-hydroxy benzyl thiophenyl) benzene and 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine in N, N-dimethyl formamide solvent; synthesizing the 1, 3, 5-tri(4-hydroxy benzyl thiophenyl) benzene, the 2, 4, 6-tri(4-hydroxy benzyl thiophenyl)-1, 3, 5-triazine and 3, 5-di-tert-butyl-4-hydroxy phenylacrylic acid methyl ester to prepare the type A reactive sulfur-containing hindered phenol antioxidant and the type B reactive sulfur-containing hindered phenol antioxidant; and synthesizing the type A reactive sulfur-containing hindered phenol antioxidant, the type B reactive sulfur-containing hindered phenol antioxidant, terephthalic acid and ethylene glycol to prepare heat-resistant oxygen-resistant polyester resin, so that the heat-resistant oxygen-resistant polyester film good in performance is prepared.

The invention discloses a synthesizing method and application of 1,2,4,5-tetraamine benzene. The synthesizing method comprises the following steps: preparing a chlorobenzene byproduct which is 1,2,3-trichlorobenzene as a raw material; nitrifying to obtain 4,6-binitro-1,2,3-trichlorobenzene; further performing ammonolysis in an organic solvent A to obtain 4,6-binitro-2-chlorine-1,3-phenylenediamine; dissolving an ammonolysis product into an organic solvent B; performing catalytic hydrogenolysis to obtain 1,2,4,5-tetraamine benzene. Compared with the prior art, the method has the advantages thatthe chlorobenzene byproduct which is 1,2,3-trichlorobenzene is utilized, and moreover, nitroreduction and halogen hydrogenolysis are integrated during the hydrogenolysis process, thereby facilitatingindustrial production, and providing raw material support to development of downstream products. The application is that 1,2,4,5-tetraamine benzene is used as the raw material and polymerized with 2,5-dihydroxy terephthalic acid to obtain PDBI resin which is an engineering fiber material being high in spinnability and high in modulus.

The present invention relates to oriented chlorination and fractionating process of chlorobenzene to produce high purity 1, 2, 4-trichlorobenzene and para-dichlorobenzene. Chlorobenzene and catalyst are thrown into auxiliary chlorination reactor and reacted with chlorine gas at certain temperature to produce hydrochloric acid gas, after reaction for certain time, the chlorinated liquid is fed to coarse fractionating tower for heating fractionation to fractionate mixed dichlorobenzene, and mixed dichlorobenzene is heated in the dichlorobenzene rectifying tower to fractionate para-dichlorobenzene of 99.5-99.8 % purity. Mixed dichlorobenzene and catalyst are reacted with chlorine inside main chlorinating reactor at certain temperature for certain time, the product is heated and fractionated in coarse fractionating tower to obtain semi-finished product, and the semi-finished product is heated and fractionated in the trichlorobenzene fractionating tower to obtain 1, 2, 4-trichlorobenzene product of 99.5 % purity.

The invention provides a novel route cefprozil compound, which simplifies the processes of 7-phenylacetamide-3-chloromethyl cephalosporanic acid anisyl acetate and triphenylphosphine phyllocaline Benedict's reagents, and activating reagents such as sodium iodide and the like do not need to be added, so the post treatment is simple and convenient, the production amplification can be realized more easily, and at the same time, para hydroxybenzene glycine is adopted to react with 2, 4, 6-trichlorophenol to generate a novel intermediate product of para hydroxybenzene glycine 2, 4, 6- phenyl ester trichlorine. The stability and the activity of the compound are mild, by-products produced in the reaction are fewer, the reaction yield is improved, and in addition, the obtained products have high purity and low isomeride content.

The invention discloses a method for eluting and restoring 1,2,4-trichlorobenzene polluted soil by a cyclodextrin solution, which relates to a restoring method of soil organic pollution. The method comprises the following steps: (1) dissolving cyclodextrin in distilled water to prepare a cyclodextrin solution of 1.5-20g / L; (2) polluting a fresh soil sample by a 1,2,4-trichlorobenzene acetone solution to obtain a simulative polluted soil sample with a pollution load of 465.63mg / kg; (3) weighting and uniformly adding the simulative polluted soil sample into an organic glass column, adding quartzsand of 3-5 cm and a little glass wool on the lower part of the column, adding the polluted soil sample and then adding quartz sand of 1-1.5 cm and a little glass wool on the polluted soil sample; eluting the organic glass column with the soil from above down by the cyclodextrin solution; (4) adding active carbon in a container, then adding the cyclodextrin solution containing 1,2,4-trichlorobenzene after eluting, shaking the container for 24h by a shaking table, and then purifying the cyclodextrin solution through a filter with a glass fiber film for standby. The removal rate of the 1,2,4-trichlorobenzene in soil can reach 52-78 percent.

The invention provides a quinoline-benzimidazole IVB group mono-Cp complex, a preparation method and application thereof and a method for polymerization reaction of olefin. The quinoline-benzimidazole IVB group mono-Cp complex adopts the structure shown in a formula (I), wherein R<1> refers to C1-C3 alkyl; R<2>-R<5> respectively and independently refer to H, C1-C3 alkyl or halogen, R<6> refers to H or C1-C3 alkyl; Cp' refers to substituted or non-substituted cyclopentadienyl. A 2-benzimidazole-8-hydroxyquinoline mono-Cp titanocene complex provided by the invention has higher catalysis reactivity, so ethylene homopolymerisation, and ethylene and alpha-olefin copolymerization are catalyzed better. In addition, under the condition of 150 DEG C, 0.04 g of a polymer obtained through catalysis of the complex is placed in 50 mL of 1,3,5-trichlorobenzene, and the solubility of the polymer is less than 0.05wt%, so the result shows that the obtained polymer is a super-high molecular weight polymer. (The formula (1) is shown in the Specification).

The invention relates to the field of crosslinked polyethylene, and discloses a crosslinkable polyethylene composition, crosslinked polyethylene, a preparing method, a product and an application. The composition comprises polyethylene, wherein the mass fraction of trichlorobenzene dissolving deposition of 90 DEG C of the composition is 49% to 83%; the composition is heated for 10 min to 20 min at the temperature of 180 DEG C to 200 DEG C and subjected to crosslinking, the content of gel of the obtained product is smaller than 20% in weight. By means of the crosslinkable polyethylene composition, the crosslinked polyethylene which is high in rigidity and capable of remarkably improving the impacting performance is obtained, and can be applied in polymer welding.

The invention discloses a synthesis method of 3,5-dichloroaniline. 1,3,5-trichlorobenzene serves as a raw material, alkali or an ammonia solution or ammonium salt is added into an organic solvent to serve as an ammonia source, a coupling reaction is generated under the effect of a transition metal catalyst and ligand, and the product 3,5-dichloroaniline is obtained. According to the method, the raw materials are simple and easy to obtain, the cost is low, synthesis steps are simple, the product 3,5-dichloroaniline can be obtained through direct coupling of 1,3,5-trichlorobenzene and the ammonia source only through a one-step reaction, fewer byproducts are generated, fewer three wastes are generated, environmental friendliness is achieved, upgrading of the product process is achieved, and great significance is achieved for reducing the synthesis cost of 3,5-dichloroaniline and derivatives thereof.

The invention discloses a disinfection sterilization medical ultrasonic coupling medium with the bactericidal function and used in the ultrasonic detection and treatment of skin and cavitary mucosa and a preparation method of the coupling medium, wherein, the ultrasonic coupling medium comprises propylene glycol, de-ionized water and one viscosity modifier of the hydroxy ethyl cellulose, carbomerand hydroxy propyl cellulose. The coupling medium further comprises a fungicide of 0.05 to 0.15 percent and the constituents of the fungicide are any one of polyhexamethylene biguanide, benzalkonium chloride, benzalkonium bromide, chlorhexidine acetate, trichlorobenzene phenoxy diphenyl ether and nanometer silver or any combination of the olyhexamethylene biguanide, the benzalkonium chloride, thebenzalkonium bromide, the chlorhexidine acetate, the trichlorobenzene phenoxy diphenyl etherand, and the nanometer silver; the preparation method used for preparing the ultrasonic coupling medium is as follows: dispersing the hydroxy ethyl cellulose in the propylene glycol, stirring and dispersing the hydroxy ethyl cellulose by adding enough water, heating to 75 to 80 DEG C, preserving the heat for 30 minutes to cool the hydroxy ethyl cellulose and the propylene glycol to 45 DEG C, adding the fungicide to stir and cool the fungicide, the hydroxy ethyl cellulose and the propylene glycol to obtain the filled coupling medium. Tests show that the products of the coupling medium have fast and long sterilization effect and meet the requirements of various related standards.

A film-forming composition that contains a tricarbonyl-benzene hyperbranched-polymer cross-linker and a triazine-containing hyperbranch, as shown for example in the formula, can form a thin film that excels in terms of hardness and heat tolerance and exhibits a reduced decrease in index of refraction despite the addition of the cross-linker.

The invention relates to an insulating heat conduction coating, which comprises the following components in part by weight: 110 to 180 parts of organic solvent, 100 to 150 parts of plastic substrate and 30 to 50 parts of inorganic filler, wherein the organic solvent is one or a mixture of more than two of tetralin, trichlorobenzene, dimethylbenzene, cyclohexanone, acetate, ethane, benzene and trichloromethane; the plastic substrate is one or a mixture of more than two of polypropylene plastics, polyethylene plastics and polyphenylene sulfide plastics; and the inorganic filler is one or a mixture of more than two of magnesium oxide powder, aluminum oxide powder and silicon carbide powder. A preparation method for the insulating heat conduction coating comprises the following steps of: performing hot melting, stirring and mixing. The insulating heat conduction coating serving as a main layer is coated in an inner cavity of a metal shell of a lithium ion battery, so that the heat dissipated by the battery in the using process can be led out quickly; and the integral shell is insulated from the battery to prevent electrolyte in the long-term using process from corroding the metal shell, so the thermorunaway and sealing failure of the lithium ion battery can be reduced effectively.

The invention discloses a hyperbranched POSS flame retardant and a preparation method and applications thereof. The hyperbranched POSS flame retardant is prepared by the following steps: performing hydrolysis reaction on octaphenyl polyhedral silsesquioxane under alkaline condition to obtain heptaphenyl trisilihydroxyl polyhedral silsesquioxane, then reacting the heptaphenyl trisilihydroxyl polyhedral silsesquioxane with 1,3,5-trichlorobenzene to obtain a hyperbranched POSS intermediate, finally reacting the obtained hyperbranched POSS intermediate with AB2 monomer. Through tests, the flame retardance performance, mechanical performance, heat-insulating and smoke inhibition performances of a silicon rubber flame-retardant composite material of the hyperbranched POSS flame retardant are obviously improved, so that the hyperbranched POSS flame retardant has wide application prospects. In addition, the preparation technique is economic and practical, the preparation process is simple, the cost is low, special equipment and harsh conditions are not needed, large-scale production is easily realized, and high practical values can be achieved.

The invention relates to a high-melt-strength anti-impact polypropylene foamed board. The foamed board is prepared through foaming with high-melt-strength anti-impact polypropylene as matrix resin. The high-melt-strength anti-impact polypropylene comprises a random copolymerization polypropylene continuous phase and a rubber dispersed phase of propylene-ethylene copolymer, wherein the content of room temperature dimethylbenzene soluble substances of the high-melt-strength anti-impact polypropylene is larger than 10 wt% and smaller than 35 wt%, and the ratio of Mw of room temperature trichlorobenzene soluble components to Mw of room temperature trichlorobenzene insoluble components is larger than 0.4 and smaller than 1. The invention further relates to a preparation method of the foamed material. The foamed material has higher melt strength, so foamed products with higher foaming ratio and better surface smoothness can be obtained, and the foamed material also has the characteristics of being high in rigidity, high in toughness and the like. Meanwhile, the foamed board has the advantages of being good in high-and-low-temperature anti-impact performance, high in physical heat resistance, high in percentage of close area, good in heat insulation and sound isolation performance, controllable in foaming ratio and foam pore structure and the like.

The invention relates to a flame retardant antistatic polypropylene composition and a pipe prepared therefrom. The composition comprises basic polypropylene resin, a fire retardant, and a conductive filling material. The basic polypropylene resin comprises a propylene homopolymer component and ethylene-1-butene copolymer; wherein the propylene homopolymer component at least comprises first propylene homopolymer and second propylene homopolymer. In the basic polypropylene resin, the ratio of the Mw of a substance, which is soluble in trichlorobenzene at a room temperature, to the Mw of a substance, which is insoluble in trichlorobenzene at a room temperature, is greater than 0.5 and less than 1; preferably in a range of 0.5 to 0.8. At a room temperature, the content of a substance, which is soluble in xylene at a room temperature, is in a range of 10 wt% to 30 wt%. The content of 1-butene is 5 to 20 wt%. The provided pipe has a good antistatic and flame retardant performance, moreover, the melt strength is high, and the impact resistant property is good.

The invention discloses a preparation technology of dye disperse yellow 54#. The preparation technology comprises the steps that a thermal reaction is conducted on 2-methyl-3-hydroxyquinoline or 2-methyl-3-hydroxyquinoline-4-carboxylic acid and phthalic anhydride at the temperature of 200+ / -20 DEG C, after the reaction is completed, materials are put into hot water for dilution while the materials are hot, after dilution is completed, stirring and cooling are conducted to reach the temperature of 80+ / -10 DEG C, the materials are subjected to grinding through a colloid grinder, the pH value of the materials is adjusted to be between 7.5 and 9.0, thermal insulation is conducted at the temperature of 50-100 DEG C for 30 min or above, filtering and washing are conducted, and a target product is obtained. According to the preparation technology of the dye disperse yellow 54#, high-boiling-point solvent trichlorobenzene is not adopted in the reaction system, the phenomena of caking and balling of the product are greatly relieved, the aftertreatment process is easier, the whole technology is greener and more environmentally friendly, the grinding process of the colloid grinder is added for the diluted materials, the phenomena of caking and balling of the product are further significantly relieved, and the purity of the prepared target product reaches up to 98%-99.5%.

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.

The invention discloses a method for detecting chlorobenzene in sludge through ultrasonic assisted dispersive liquid-liquid microextraction-gas chromatography. The method comprises the steps of (1) preparation of a standard solution, namely preparing 0.1milligram / ml of standard mixed solution comprising m-dichlorobenzene, o-dichlorobenzene, 1,2,4-trichlorobenzene, 1,2,3-trichlorobenzene, 1,2,4,5-tetrachlorobenzene, and 1,2,3,4-tetrachlorobenzene; (2) ultrasound-assisted extraction, namely putting 1.0g of a sludge sample into a cone centrifuging tube with a turncap, adding acetone, sealing, extracting by ultrasounds, centrifuging extract liquor, then filtering supernate by a microfiltration membrane, and moving into the cone centrifuging tube; (3) dispersive liquid-liquid microextraction; and (4) gas chromatography. The method for detecting the chlorobenzene compounds in the sludge has the high sensitivity. Compared with conventional detection methods such as a soxhlet extraction method, the method saves a large amount of organic solvent being toxic and harmful to human bodies, and little time is used in analysis, so that the method is applicable to the detection on a large quantity of sludge samples.

The invention provides a method for preparing dichlorobenzene and trichlorobenzene and increasing the para-ortho ratio, and is characterized in that a chlorination reaction takes benzene or chlorobenzene as a raw material; a continuous chlorination reaction is carried out in the presence of a main catalyst and an auxiliary agent, through a ring type continuous chlorination reactor or a multi-stage series-connection kettle type reactor and under the conditions of the reaction temperature of 50-120 DEG C and the reaction pressure of -0.05-0.5 MPa; and a reaction liquid passes through a membrane filtration system, the main catalyst remains in the reactor for reaction, a dichlorobenzene clear liquid after filtration is subjected to light component removal, rectification and crystallization to obtain dichlorobenzene, orthodichlorobenzene, 1,2,3-trichlorobenzene and 1,2,4-trichlorobenzene finished products. Compared with a conventional dichlorobenzene preparation process, the method has the dichlorobenzene para-ortho ratio greatly increased to 8.5 and the trichlorobenzene para-ortho ratio greatly increased to 13.6, and has the advantages of low use cost of the catalyst auxiliary agent, continuous production realization, good product selectivity and the like.

The invention provides an impact-resistant polypropylene material with high melt strength and a preparation method therefor. The polypropylene material comprises a propylene homopolymer component and an ethylene-1-butylene copolymer component; the weight ratio of the ethylene-1-butylene copolymer component to the propylene homopolymer component is (11-80): 100, and the content of butylene in an ethylene-1-butylene copolymer is higher or equal to 20wt% and is lower or equal to 45wt%; and the ratio of room-temperature trichlorobenzene soluble Mw of the material to room-temperature trichlorobenzene insoluble Mw of the material is greater than 0.5 and is smaller than or equal to 1. The polypropylene material provided by the invention has high melt strength, also has the characteristics of high rigidity and high toughness and is extensive in application, for example, is applicable to the fields of automotive parts, medical appliances, household items and the like.

The invention provides high-melt-strength impact-resistant polypropylene foamed beads and a preparation method thereof. The foamed beads are prepared by dipping and foaming high-melting-strength impact-resistant polypropylene serving as base resin; the high-melting-strength impact-resistant polypropylene comprises an atactic copolymerization polypropylene continuous phase and a propylene-ethylene copolymer rubber dispersion phase; the room-temperature xylene dissolved substance content is more than or equal to 10 percent by weight and less than or equal to 35 percent by weight; the ratio of the Mw of room-temperature trichlorobenzene dissolved substance to the Mw of room-temperature trichlorobenzene undissolved substance is more than 0.4 and less than or equal to 1. The polypropylene foamed beads provided by the invention has the advantages of foam pore and pore diameter distribution uniformity, high closed pore rate, good high-temperature and low-temperature impact resistance, high melt strength and the like, and can be widely applied in the fields of automobile parts, food, electronic package, building decoration and the like; the preparation method is simple, easy to operate and low in cost.

An organic semiconductor thin film exhibiting high mobility and a method for preparing the same, and a material for preparing the organic semiconductor thin film by a wet process and a method for preparing the same are provided. Further, an organic semiconductor device excellent in electronic characteristics is provided. A mixture of high purity pentacene and 1,2,4-trichlorobenzene was heated to prepare a homogeneous solution, and a silicon substrate having a pattern of a gold electrode as a source / drain electrode formed thereon was heated to 100° C. and the resultant pentacene solution was spread on the surface of the substrate. When 1,2,4-trichlorobenzene was evaporated, a pentacene thin film was formed. A transistor was formed with the use of the thin film.

The invention discloses a method for purifying 1,2,4-trichlorobenzene from a trichlorobenzene mixture, and belongs to the technical field of fine chemical engineering. The method comprises the steps that firstly, trichlorobenzene is mixed in a melt crystallization device, the temperature is lowered to 0 DEG C from room temperature, and uncrystallized mother liquid is drained; secondly, crystallized solids are sweated by increasing the temperature from 0 DEG C, wherein the sweating temperature is 0 DEG C-11 DEG C, the average temperature increasing speed is 0.025 DEG C / min-0.035 DEG C / min, and sweating does not stop until the total mass of sweat generated through sweating accounts for 1 / 9-1 / 2 of the mass of the crystallized solids in the melt crystallization device; lastly, the sweat is drained, the crystallized solids in the melt crystallization device are melted by increasing the temperature, and then 1,2,4-trichlorobenzene is obtained. According to the method, 1,2,4-trichlorobenzene is separated out in the mode of melt crystallization and gradual temperature-increasing sweating, and the advantages of being simple in method, low in cost, high in efficiency and suitable for industrialized production are achieved.