14 results about "O-dichlorobenzene" patented technology

This invention discloses a covalent organic framework for the separation of krypton and xenon gases and its preparation method. Using tetrahedral symmetric aldehyde ligands with four sites and amino ligands with different side group substitution sites as raw materials, o-dichlorobenzene and n-butanol as solvents, and glacial acetic acid as catalyst, a covalent organic framework compound with a 7-fold interpenetrating PTS topological network structure is synthesized through pre-ultrasonic treatment, high-temperature reaction process, and purification steps such as filtration and extraction. The synthesized covalent organic framework compound can selectively adsorb and separate xenon-krypton mixed gases.

The invention discloses a magnetic amide functionalized covalent organic framework material and a preparation method and application thereof, the preparation method comprises the following steps: S1, uniformly dispersing Fe3O4 nanoparticles and ammonia water, adding tetraethyl orthosilicate, and reacting; s2, a product obtained in the step S1 and 3-aminopropyltriethoxysilane are uniformly dispersed and subjected to a reaction, and aminated magnetic nanoparticles Fe3O4 (at) SiO2-NH2 are obtained; and S3, uniformly dispersing the Fe3O4 (at) SiO2-NH2 and trialdehyde phloroglucinol in a mixed solution of o-dichlorobenzene and N, N-dimethylformamide, adding 4, 4 '-diaminobenzanilide, uniformly mixing, then adding an acetic acid solution, and reacting at the temperature of 100-120 DEG C for 3-5 days to obtain the magnetic covalent organic framework Fe3O4 (at) Am-COFs material. The Fe3O4atAm-COFs prepared by the preparation method disclosed by the invention has a large specific surface area, rapid magnetic separation capability and abundant active sites, so that the adsorption performance of the material on a target object is effectively improved.

The application belongs to the technical field of organic synthesis, and particularly relates to a method for catalytically synthesizing N-substituted-3-methyl indole compounds by using aza carbene oxazoline ring palladium compound. The application aims to provide a new synthesis method for N-substituted-3-methyl indole compounds, specifically, a high-catalytic-activity aza carbene oxazoline ring palladium compound is used as a catalyst to catalyze a direct coupling cyclization reaction of o-dichlorobenzene or o-bromochlorobenzene compounds and allyl arylamine, so as to obtain N-substituted-3-methyl indole compounds. The catalyst used in the application has high catalytic activity, the reaction has good product and functional group compatibility, in addition, the catalyst itself is easy to synthesize, and aryl chlorides used in the synthesis route are cheap and easy to obtain. Therefore, the synthesis route provided in the application has great competitive advantages and industrial production utilization value.

The present application belongs to the technical field of rectification separation, and provides a rectification separation and purification method for preparing high-purity o-dichlorobenzene. The present application adopts the design of loading surface-modified structured packing in the rectification section of the rectification tower. The structured packing is composed of an alumina ceramic matrix and a cross-linked copolymer layer. The cross-linked copolymer layer contains structural units formed by N-vinyl-2-pyrrolidone, 2-hydroxyethyl methacrylate and ethylene glycol dimethacrylate, and is prepared through a silanization and graft cross-linking polymerization process. The rectification tower is operated under the conditions of a tower top absolute pressure of 0.5-20 kPa and a reflux ratio of 2-6. The present application realizes the efficient separation of o-dichlorobenzene products with a purity of not less than 99.9 wt% from dichlorobenzene isomer mixtures, solves the problem that the structured packing in a low-pressure rectification system cannot simultaneously achieve low pressure drop, large flux and high separation efficiency, and the stability of the surface modification layer in a high-temperature organic vapor environment is insufficient, and has wide industrial application value.

The application discloses a kind of solid-state luminescent Schiff base two-dimensional covalent organic framework material and its preparation method and application, belong to material field.The preparation method of the solid-state luminescent Schiff base two-dimensional covalent organic framework material of the present application includes the following steps: the amine with C2 symmetry, DAD, solvent and acetic acid aqueous solution are mixed, and solvent thermal reaction is carried out, to obtain the solid-state luminescent Schiff base two-dimensional covalent organic framework material;The solvent is o-dichlorobenzene and n-butanol.The COFs material prepared in the application has high crystallinity and porosity, and the solid-state absolute luminescence quantum yield is as high as 39%.

The invention provides a flexible polyimide COF composite diaphragm with a triazine structure, a preparation method and application of the flexible polyimide COF composite diaphragm in an aqueous zinc-iodine battery, and relates to the technical field of aqueous zinc-iodine batteries. The composite diaphragm is prepared by the following steps: preparing an organic framework material from pyromellitic dianhydride (PMDA) and 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine (TPT) in an o-dichlorobenzene / N-methyl pyrrolidone mixed solvent through a solvothermal method, and uniformly coating the surface of a glass fiber diaphragm with the organic framework material. The area capacity of the aqueous zinc-iodine battery of the composite diaphragm prepared by adopting a triazine structure and a flexible annular design reaches 7.8 mAh cm <-2 > or above under the ultrahigh surface current density of 20 mA cm <-2 >, high capacity and high coulombic efficiency are still kept after 800 cycles, the zinc ion diffusion coefficient reaches 4.07 * 10 <-8 > cm < s >, and the performance is remarkably superior to that of all existing diaphragm modification technologies.

The application provides adamantane-modified fullerenes (C 60 ) pyrrolines with enhanced fluorescent properties. The application discloses adamantane-modified fullerenes pyrrolines with enhanced fluorescent properties, and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing and dispersing fullerenes, paraformaldehyde, 1-adamantane methylamine and o-dichlorobenzene, reacting, evaporating a solvent under reduced pressure, separating by column chromatography, and recrystallizing to obtain adamantane-modified fullerenes pyrrolines. The adamantane-modified fullerenes pyrrolines are dissolved in m-xylene, and a poor solvent, isopropanol, is slowly added dropwise to form a clear liquid-liquid interface. The reaction liquid is shaken until the liquid-liquid interface disappears, and then is subjected to ultrasonic treatment, standing, precipitation, washing, and drying to obtain microcrystals. The synthesis process is simple, and raw materials are cheap and easy to obtain. The crystallization method is simple and effective, and the crystallization is good, so that the crystal morphology and size can be controlled. The obtained adamantane-modified fullerenes pyrrolines and cubic crystals have good solubility in organic solvents, excellent fluorescent properties, and symmetrical structure, which is beneficial to subsequent application.

A lithium-mediated electrochemical method for ammonia synthesis, relating to the field of ammonia synthesis technology, solves the technical problems of severe side reactions, limited nitrogen mass transfer, and poor interfacial stability in existing lithium-mediated ammonia synthesis systems. Tetra(4-formylphenyl)porphyrin iron and an amino-containing multifunctional organic ligand are added to a mixed solvent of n-butanol and o-dichlorobenzene. An acid catalyst is added, and after stirring until homogeneous, the mixture is degassed and sealed for reaction. The solid product is collected by centrifugation, washed, and dried to obtain COF powder. This powder is then added to an ethanol-water solution, followed by ultrasonic dispersion with Nafion solution. The powder is then drop-coated / sprayed onto the surface of a carbon paper current collector and dried. This powder is used as the working electrode, with a platinum mesh as the counter electrode, a platinum wire as the quasi-reference electrode, and a LiBF4 tetrahydrofuran solution as the electrolyte. Ethanol is used as the proton donor, and electrolysis is performed under a nitrogen atmosphere using a constant current. This invention can be applied to the field of ammonia synthesis technology.

A toner, comprising a toner particle comprising a binder resin, wherein the binder resin comprises an amorphous polyester and a crystalline polyester; (i) a weight-average molecular weight of a soluble matter of the crystalline polyester in o-dichlorobenzene at 100° C. is 1500 to 4900; (ii) the crystalline polyester comprises a modified crystalline polyester having at least one terminal-modified structure selected from among a structure in which a hydroxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C16 to C31 aliphatic monocarboxylic acid, and a structure in which a carboxy group at a main chain terminal of the crystalline polyester is terminal-modified with a C15 to C30 aliphatic monoalcohol; and (iii) a content ratio of the terminal-modified structure in the crystalline polyester is 80.0 mol % or higher.

The utility model discloses a reaction device for wet synthesis of sodium cyanate, which comprises a dissolving kettle and a synthesis kettle, and the dissolving kettle is communicated with the synthesis kettle through a pipeline; the dissolving kettle and the synthesis kettle are communicated with the o-dichlorobenzene tank through pipelines, the synthesis kettle is communicated with the filter through a pipeline, and the filter is communicated with the mother liquor tank through a pipeline. According to the wet synthesis device disclosed by the utility model, the dissolving kettle and the synthesis kettle are matched with the material transfer pump to finish feeding, dissolving, stirring and reaction of raw materials, the condensation reflux of a solvent is finished through the plurality of groups of condensers, and the spraying and recycling of tail gas are finished through the plurality of groups of spraying towers matched with the material transfer pump, so that the content of sodium cyanate produced by the whole wet synthesis device is higher; meanwhile, the generated ammonia gas can be converted into ammonium carbonate to be recycled, so that the production cost and the environmental pollution are effectively reduced.

The invention relates to the technical field of new materials and photocatalysis, and particularly discloses a preparation method of covalent organic framework / titanium dioxide heterojunction light-operated selective methane oxide. The preparation method of the covalent organic framework / titanium dioxide heterojunction comprises the following steps: dissolving 1, 3, 6, 8-tetra-(p-aminophenyl)-pyrene and 4, 4 '-(5, 6-difluorobenzo [c] [1, 2, 5] thiazole-4, 7-diyl) dibenzaldehyde in an o-dichlorobenzene / n-butyl alcohol mixed solution, then adding titanium dioxide nanosheets, performing ultrasonic treatment, adding 6 mol / L acetic acid, then preserving heat at 120 DEG C for 72 hours, centrifuging, washing and drying to obtain the covalent organic framework / titanium dioxide heterojunction. The covalent organic framework / titanium dioxide heterojunction prepared by the method disclosed by the invention has very good light control capability in a photon-generated carrier migration direction, and respectively shows excellent activity of oxidizing methane into formaldehyde and methanol with high selectivity under illumination of 365 nm and 450 nm.

The present application belongs to the field of chemical analysis and detection and rectification control, and provides a detection method and preparation method of high-purity o-dichlorobenzene, the present application determines through closed sampling, different polarity capillary column double-column gas chromatography, target impurity fingerprint, water content and acidic component combination, and feeds back the determination result to the light removal, main rectification, heavy removal and reprocessing path according to the corresponding relationship between abnormal index and preparation parameter, forms a detection-preparation feedback closed loop, realizes stable 1,2-dichlorobenzene purity, accurate impurity attribution and timely working condition adjustment, solves the problem that purity stability and processing efficiency, feedback timeliness and attribution accuracy are difficult to be considered, and is suitable for high-purity o-dichlorobenzene continuous or batch production quality control.

The present invention relates to a method for recycling a composite, wherein the composite comprises a fibre and polybutylene terephthalate (PBT), the method comprising: (a) contacting the composite with a solvent solution comprising ortho dichlorobenzene (oDCB) such that the PBT dissolves in the solvent solution to form a solvate and separates from the fibre; (b) isolating the fibre from the solvate.

A method for recycling a composite comprising a fibre and polybutylene terephthalate (PBT), the method comprising: (a) contacting the composite with a solvent solution comprising ortho dichlorobenzene