1034 results about "Dichlorobenzene" patented technology

Solvent mixtures useful for processing bulk heterojunction materials and methods for selecting the same are disclosed, wherein Hansen solubility parameters are utilized to select the solvent mixture. A solvent system using a fully nonhalogenated solvent mixture is disclosed. Also disclosed is a solvent mixture containing 20 vol. % acetophenone (AP) in mesitylene (MS), wherein the performance of the solvent system is comparable to dichlorobenzene.

The invention relates to neutral mononuclear copper (I) complexes for emitting light and with a structure according to formula (A) in which: M represents: Cu(I); L∩L represents: a single, negatively charged, bidentate ligand; N∩N represents: a diimine ligand (substituted with R and FG), in particular a substituted 2,2′-bipyridine derivative (bpy) or a substituted 1,10-phenanthroline derivative (phen); R represents: at least one sterically demanding substituent for preventing the planarisation of the complex in the excited state; FG=functional group, and represents: at least one second substituent for increasing solubility in organic solvents. The substituent can also be used for electron transport or alternatively for hole transport, said functional group being bound to the diimine ligands either directly or by means of suitable bridges; and the copper (I) complex: having a ΔE(S₁−T₁) value of less than 2500 cm⁻¹ between the lowest excited singlet state (S₁) and the triplet state (T₁) which lies below; having an emission lifespan of at most 20 μs; having an emission quantum yield of greater than 40%, and a solubility of at least 1 g/L in organic solvents, in particular polar organic hydrocarbons such as acetone, methyl ethyl ketone, benzene, toluene, chlorobenzene, dichlorobenzene, dichloromethane, chloroform, dichloroethane, tetrachloroethylene, alcohols, acetonitrile or water.

The invention discloses a carbon nanotube cotton and a preparation method thereof, belonging to the technical field of synthesis and application of carbon nanomaterials. The carbon nanotube cotton in the invention is a macro-body material with a disorderly network-like porous structure, and the carbon nanotube cotton is formed by mutually winding and lapping a plurality of carbon nanotubes. The carbon nanotube cotton has the advantages of super-low density, super-hydrophobicity, good absorption, good cycle compressibility, good shape memory function and good thermal insulation. The carbon nanotube cotton can be used as the material for energy absorption, shock absorption, thermal insulation, sound absorption, toxic organic solvent absorption, oil-water separation, filtration and the like. The carbon nanotube cotton is directly produced by the catalytic cracking method, dichlorobenzene is taken as a carbon source, and ferrocene is taken as a catalyst. The preparation method has simple process and simple operation and is applicable to mass production.

The invention belongs to the technical field of polymer solar cells and particularly relates to a reciprocal form electrode polymer solar cell using TiO2 as an electronic transmission layer, CuPc as a cavity transmission layer and a preparation method thereof. The method includes the steps of: using sol-gel technology to grow a layer of uniform and compact nanocrystal titanium dioxide (TiO2) film on an ITO glass substrate, then spin-coating a layer of P3HT:PCBM solution dissolved by dichlorobenzene, after annealing, using thermal evaporation to grow a layer of CuPc with certain thickness and finally evaporating Au electrode. The polymer solar cell prepared by utilizing the method solves two problems of the traditional polymer solar cell, namely that the mixed solution of 3, 4-EDOT and polystyrolsulfon acid corrode the surface of ITO glass, and the excessive thinness of cathode buffer layer LiF causes the operating process to be difficult to be controlled accurately.

The invention relates to a detection method for plant growth regulator residues in fruits. The detection method comprises the following steps: the QuEChERS method is adopted to extract and purify the plant growth regulator residues in fruits, so as to enable the adding standard recovery rate of the target compound to reach 71%-98%; the RSD ( relative standard deviation) is not higher than 6%; the sensitivity and selectivity are favorable and the recovery rate is stable; the liquid chromatograph tandem mass spectrogram detection method is adopted to simultaneously detect forchlorfenuron, ethephon, 4-sodium chlophenoxycetate and 2,4- sodium acetate-dichlorobenzene oxygen; the detection limits range from 0.5 microgram/kg to 100 microgram/kg respectively; the sensitivity requirement of national limited standard is met. The detection method has favorable sensitivity and selectivity and can serve as a method for detecting the plant growth regulator residues in fruits.

The invention relates to an industrial production method for semi-crystal poly(aromatic ether nitrile), which belongs to the field of polymer material. The method comprises the following steps: 2, 6-dichloro benzonitrile and hydroquinone are taken as raw materials; anhydrous potassium carbonate is taken as a catalyst; in the presence of a solvent and a dehydrating agent, the raw materials and the catalyst react under atmospheric pressure to obtain the poly(aromatic ether nitrile) homopolymer with low molecular weight and regular chain segments; and then the molecular weight of polymer is increased through pressurization, so as to obtain the semi-crystal poly(aromatic ether nitrile) polymer with high molecular weight. Due to the increase of crystallinity and molecular weight, the mechanical properties and heat resistance of the semi-crystal poly(aromatic ether nitrile) polymer are obviously improved.

The invention discloses auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process. The formula of raw materials required in the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process is as follows: the mole ratio of sodium sulfide to sodium hydroxide to santochlor to N-methyl-2-pyrrolidinone is 0.93-1.15 to 1.00-1.28 to 1.98-2.98 to 1.18 to 1.48. The industrial synthetic process mainly comprises the following steps: firstly, in a sodium hydrosulfide dehydration treatment stage, a pipeline filter is adopted to filtrate a sodium hydrosulfide solution to treat mechanical impurities in the solution, then a sodium hydroxide solution with the concentration 84 mol percent is added in the formula for chemical treatment on the sodium hydrosulfide; secondly, in the condensation polymerization stage, anaerobic deionized water is added to further appropriately adjust the molecular weight and molecular weight distribution coefficient of synthesized polyphenylene sulfide resin; thirdly, deionized water is adopted for repeatedly scrubbing for 3 to 6 times, and finally, the target product of the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process provided by the invention is obtained. The resin in the obtained product of the auxiliary-addition-free polyphenylene sulfide resin industrial synthetic process is low in polydispersity index and high in oxygen index, and has an excellent electrical insulation property.

The invention discloses a silicone rubber insulating fluororubber cable material and a preparation method thereof. The silicone rubber insulating fluororubber cable material comprises the following raw materials in parts by weight: 90-100 parts of methyl vinyl silicone rubber, 20-30 parts of magnesium hydroxide, 40-60 parts of SBS (Styrene Butadiene styrene), 50-60 parts of ethylene-vinyl acetate copolymer, 20-30 parts of polytetrafluoroethylene, 1-4 parts of precipitated white carbon black, 60-80 parts of light calcium carbonate, 2-4 parts of 2,4-dichlorobenzoyl, 3-5 parts of accelerant DM, 3-6 parts of 2-thiolbenzimidazole, 1-3 parts of cross-linking agent TAC, 2-4 parts of calcium stearate, 2-4 parts of antioxidant DSTP, 1-5 parts of stearoyl-rac-glycerol, 2-5 parts of stearic acid and 10-20 parts of ammonium polyphosphate. According to the invention, the preparation method is simple, the electric performance is superior, the formula of the raw materials is rational, and the prepared cable material is environment-friendly, has the advantages of softness, wear resistance, watertightness and the like, and passes the A-level fire resistance test in China.

The invention discloses a preparation method for anthelmintic benzimidazole fenbendazole. The method is characterized in that: p-dichlorobenzene is used as a starting raw material which is subjected to nitration, amination, condensation, reduction and ring-closure reactions so as to obtain fenbendazole (the content of the final product being 98% to 101%). The novel preparation method has the characteristics of a simple and highly efficient process and safe operation, and is suitable for industrial production.

The present invention relates to a composite of a porous substrate and one-dimensional nanomaterial, which is manufactured by a hydrothermal method. The method for manufacturing the composite of the present invention is simple and low-cost, and the one-dimensional nanomaterial is homogeneously distributed on the porous substrate with tight binding at the interface. The present invention also relates to a surface-modified composite and a method for preparing the same. The composite of the present invention which is hydrophobically modified at the surface can adsorb organic solvents such as toluene, dichlorobenzene, petroleum ether and the like, and greases such as gasoline, lubricating oil, motor oil, crude oil and the like, with a weight adsorption ratio of >10.

The rooting agent suitable for stem planting of golden camellia branch consists of 2, 4-dichloro phenoxyacetic acid, 3-indole butyric acid, sodium guaiacol mononitrate, sodium hydroxide and borax. It is diluted before being used for stem planting of golden camellia branch in spring, summer and autumn, and survival rate of golden camellia seedling may reach 93-98 %. The present invention makes it possible to protect, develop and utilize golden camellia via fast industrial seedling growing.

The invention relates to a polyamide-imide insulating varnish. The polyamide-imide insulating varnish is characterized in that the varnish comprises the following components in parts by weight: 100-120 parts of polyamide-imide solution and 2-5 parts of sepiolite material, wherein the polyamide-imide solution mainly comprises the following components in parts by weight: 20-35 parts of polyamide-imide resin and 20-60 parts of organic solvent; the organic solvent is one or a combination of N-methylpyrrolidone, chlorobenzene, bromobenzene, dichlorobenzene, dibromobenzene, 1-tetralone, fenchone, phorone and isophorone; and the sepiolite material mainly comprises sepiolite. The polyamide-imide insulated enamel wire provided by the invention forms a homogeneous stable system, the surface friction coefficient is below 0.30, and each index meets the International Electrotechnical Commission (IEC) standard requirement; and the polyamide-imide insulating varnish is suitable to be used as the enamel wire insulating varnish for coating the surface of the copper wire.

A combination comprising (a) a compound of formula (0): or salts or tautomers or N-oxides or solvates thereof; wherein X is R¹-A-NR⁴— or a 5- or 6-membered carbocyclic or heterocyclic ring; A is a bond, SO₂, C═O, NR⁹(C═O) or 0(C═O) wherein R⁹ is hydrogen or C_1-4 hydrocarbyl optionally substituted by hydroxy or C_1-4 alkoxy; Y is a bond or an alkylene chain of 1 to 3 carbon atoms; R¹ is hydrogen; a carbocyclic or heterocyclic group having from 3 to 12 ring members; or an optionally substituted C_1-8 hydrocarbyl group wherein 1 or 2 of the carbon atoms of the hydrocarbyl group may optionally be replaced by an atom or group selected from O, S, NH, SO, SO₂; R² is hydrogen; halogen; C_1-4 alkoxy; or a C_1-4 hydrocarbyl group optionally substituted by halogen, hydroxyl or C_1-4 alkoxy; R³ is selected from hydrogen and carbocyclic and heterocyclic groups having from 3 to 12 ring members; and R⁴ is hydrogen or a C_1-4 hydrocarbyl group optionally substituted by halogen, hydroxyl or C_1-4 alkoxy; and (b) a compound of formula (I′″) or salts, tautomers, solvates and N-oxides thereof: wherein R¹ is 2,6-dichlorophenyl; R^2a and R^2b are both hydrogen; and R³ is a group: formula (A) where R⁴ is C_1-4 alkyl.

The invention discloses a method for preparing chlorobenzene, p-dichlorobenzene and o-dichlorobenzene in benzene chlorination, and relates to a preparation method of chemical raw materials. The method comprises the following steps: continuously introducing dry benzene and chlorine with a high activity and high p-dichlorobenzene selectivity catalyst into an outer circulation reactor, wherein the benzene and chlorine need sufficient retaining time, reacting at a set temperature to prepare p-dichlorobenzene, obtain o-dichlorobenzene at the same time and co-produce chlorobenzene, preparing dichlorobenzene by using the outer circulation reactor and taking the benzene and the chlorine as raw materials and metal sulfide as a catalyst, at the same time co-producing chlorobenzene, forming circulation of the materials through the introduced nitrogen and generated hydrogen chloride as power so as to obtain good stirring for prompting mixing, diffusion, heat conduction and mass transfer of the reactants. The method is rapid in reaction speed, high in capacity, large in ratio of p-dichlorobenzene and o-dichlorobenzene, free of polychlorobenzene byproduct, and high in flexibility and operation flexibility as the ratio of the chlorobenzene to the dichlorobenzene in a product can be adjusted according to demands.

The invention discloses a preparation method of a conjugated three-dimensional porphyrin-based covalent organic framework material. The preparation method comprises the following steps: taking 3,3', 5,5'-tetra (4-formylphenyl) hexamethylbiphenyl (TFBM) and a series of porphyrin derivatives as raw materials, o-dichlorobenzene and n-butanol as solvents and acetic acid as a catalyst, and carrying outsolvothermal reaction for several days; after the reaction is finished, sequentially using DMF and THF for suction filtration and washing, carrying out soxhlet extraction for 24 hours, and carrying out vacuum drying to obtain purple black powder, namely the target product. For the first time, tetrahedral tetraaldehyde based on steric hindrance effect is used as a building block, so that the material has a fully conjugated three-dimensional skeleton structure, good thermal stability and chemical stability, and porphyrin units facing three-dimensional pore channels are used as single active catalytic sites, so that the material shows good application prospects in the field of bionic catalysis.

The invention relates to a preparation method of bromoamine acid, which comprises the following steps: (1) sulfonation reaction: by using 1-aminoanthraquinone as a raw material, dropwisely adding chlorosulfonic acid into an orthodichlorobenzene solvent to carry out sulfonation reaction so as to obtain the sulfonated material containing sulfonated product, wherein the weight ratio of the 1-aminoanthraquinone to the orthodichlorobenzene is 1:(5-7), and the temperature of the sulfonation reaction is 115-150 DEG C; (2) stratification by adding dilute sulfuric acid: after the sulfonation reaction reaches to the end, directly adding 55-60 wt% dilute sulfuric acid into the reaction system until the sulfonated material stratifies, wherein the upper stratum is an orthodichlorobenzene organic phase which can be used repeatedly, and the understratum is a sulfuric acid solution of 1-aminoanthraquinone-2-sulfonic acid; and (3) bromination reaction: adding water into the understratum material obtained in the step (2) until the acidity reaches to 8-10%, and directly dropwisely adding bromine to carry out bromination reaction, thereby obtaining the bromoamine acid crude product. The invention greatly lowers the energy consumption; and the quality and yield of the bromoamine acid product are obviously enhanced.

Bis(halophthalimides) are prepared in mixture in an organic liquid such as ortho-dichlorobenzene or anisole, by a reaction at a temperatire of at least 150° C. between at least one diamine compound and at least one halophthalic anhydride in the presence of imidization catalyst. The reaction mixture is maintained at about 15% by weight solids content and rich in the halophthalic anhydride by constantly monitoring the reaction mixture using analytical methods such as high performance liquid chromatography. The product mixture may be directly employed in the direct preparation of polyetherimides, and similar slurries may be employed to prepare other polyether polymers.

The invention discloses a process for synthesizing a low-chlorine film polyphenylene sulfide resin. In the process, sodium sulfide and santochlor are taken as raw materials, N-methyl-2pyrrolidone (NMP) is used as a solvent, and the ratio of sodium sulfide to santochlor to NMP to NaOH to sodium bicarbonate to NaHS is 1:1:3.9:(0.2-0.3):(0.2-0.3):0.05. The process comprises the following steps: in the dehydration period of the sodium sulfide, under the condition of relative low temperature of 120-130 DEG C and pressure of -0.3MPa and the protection of nitrogen, carrying out vacuum dehydration on the sodium sulfide to obtain the sodium sulfide solution of which the moisture content is 1.0-1.2mol/mol Na2S; adding NaOH, NMP and P-DCB at a corresponding molar ratio; and finally reducing the temperature at a temperature-reducing speed of 30 DEG C/min, and washing and drying to obtain the low-chlorine film polyphenylene sulfide resin required in the invention. The product in the invention has low total content of Halogens, low volatile matter and polydispersity index, narrow molecular weight distribution, high oxygen index, and excellent dielectric properties, and can be used as an insulating material or packaging material for electronic and electrical equipment.

The invention discloses a method for synthesizing 3,5-dichlorobenzoyl chloride. The method comprises the following steps: carrying out sulfonation on benzoyl chloride by sulfur trioxide to obtain 5-chloroformyl metaphenylene disulfonic acid; carrying out chlorination by catalyzed triphosgene to obtain 5-chloroformyl metaphenylene disulfuryl chloride; finally, carrying out removal of sulfur dioxide chlorination to obtain 3,5-dichlorobenzoyl chloride. Compared with an existing preparation method, the method disclosed by the invention has the characteristics of stable chlorinating agent, high production safety, small amount of three wastes, no requirement for recovering and treating a great amount of dangerous byproducts, no requirement for refining a coarse product, low production cost and the like and is suitable for industrial production.

The invention discloses a 2-aryl-1,3-dihydro-benzimidazol derivative as well as a synthesis method and application thereof. The synthesis method comprises the following steps: placing 4-nitro-o-phenylenediamine and 2,4-dichlorobenzaldehyde in an organic solvent for a reaction under the normal-temperature or heating condition; conducting suction filtration on the obtained reactant, so as to obtain a target crude product of the 2-aryl-1,3-dihydro-benzimidazol derivative. According to the research of the applicant in the anti-renal fibrosis and anti-chronic nephrosis activities of the 2-aryl-1,3-dihydro-benzimidazol derivative, namely a compound, the compound is remarkable in in-vitro anti-renal fibrosis activity, has a relatively high potential medicinal values, and is expected to be used for preparation of anti-renal fibrosis and anti-chronic nephrosis medicines. The compound has a chemical structure shown in the formula (I).

The invention relates to a process for synthesizing polyphenylene sulfide resin. The process comprises the following steps of: firstly blending sulfur source with sodium hydroxide or liquid alkali in a reaction kettle, carrying out temperature rising and dehydration in atmosphere of nitrogen, then adding 0.05-0.25 mol of sodium 4-methylamino butyrate relative to 1 mol of the sulfur source, adding p-dichlorobenzene and N-methyl-2-pyrrolidone, rising the temperature and carrying out polymerization, after finishing the polymerization, carrying out temperature lowering and decompression on the reaction kettle, screening and filtering reaction products, and carrying out washing and oven drying on granular resins. The process is adopted to synthesize the polyphenylene sulfide resin, not only the yield of the polyphenylene sulfide resin is improved, but also the production cost is lowered, and the stability of the product quality is improved.

The invention discloses a synergic herbicide composition containing cyhalofop-butyl and 2,4-dichlorophenoxyacetic acid and application thereof. The herbicide composition comprises the cyhalofop-butyl and the 2,4-dichlorophenoxyacetic acid which serve as the main active ingredients, wherein the mass ratio of the cyhalofop-butyl to the 2,4-dichlorophenoxyacetic acid is 1-60:1-60. The synergic herbicide composition can be used for preparing herbicides for controlling post-emergence weeds in paddy field. Compared with single-composition herbicide, the herbicide composition has a broad herbicide spectrum and acts for a long time on the premise of improving the herbicide effect, is safe for the paddy fields and after-reap crops and particularly has obvious effect of controlling various gramineous weeds and broadleaf weeds in the paddy fields.