27 results about "Dimethoxymethane" patented technology

This invention discloses an aminoindole derivative-based porous polymer, its preparation method, and its application, belonging to the field of dye adsorbent technology. The preparation method is as follows: 2-phenylindole is dissolved in acetic acid, and sodium nitrite aqueous solution is added dropwise. The system is then stirred and reacted at low temperature. After the reaction, the precipitate is collected and dried to obtain product 1. Product 1 is dissolved in ethanol, and NaOH solution is slowly added dropwise while stirring and mixing. Na2S2O4 is added, and the reaction is stirred under heating conditions. After the reaction, the precipitate is collected and dried to obtain product 2. Product 2, 1,2-dichloroethane, and dimethoxymethane are stirred and mixed. A catalyst is added, and the reaction is stirred and reacted under heating conditions. After the reaction, the precipitate is collected, washed, and dried to obtain the final product. The aminoindole derivative-based porous polymer of this application has high specific surface area, high adsorption rate, and high adsorption capacity, effectively solving the problems existing in the prior art.

The invention belongs to the field of synthesis and application of energy storage directional functional ionic liquid, and discloses ionic liquid and application thereof in high-voltage lithium ion battery electrolyte and solid electrolyte. The ionic liquid comprises cations and anions, the cations comprise 1-substituted imidazole groups and 2-substituent structures, the anions are obtained through ion exchange according to the requirements of an electrolyte system, and the ionic liquid is synthesized and prepared through a two-step method. And the 1-substituent imidazole is one of 1-methylimidazole, 1-ethylimidazole, 1-propylimidazole, 1-hydroxymethyl imidazole and 1-hydroxyethyl imidazole. The 1, 2-substituent group structure is one of methyl tetrahydrofuran, methyl dioxo cyclopentane, dimethoxymethane and 1, 2-dimethoxyethane. The ionic liquid can form a positive electrode interface passivation film, reduce side reaction, improve interface performance, combine thermal / electrochemical stability, match a high-voltage positive electrode and improve lithium ion battery performance.

The application discloses a synthesis method of super-crosslinked polymer, which comprises the following steps: putting FeCl3 solid into a reactor, and keeping the reactor in an oxygen-free and water-vapor-free state; adding a mixed solution of a substrate and a reactant into the reactor to carry out a first reaction, so as to obtain a first reaction product; adding methanol into the first reaction product to quench, and filtering the quenched product to obtain a second product; and carrying out washing and drying treatment on the second product, so as to obtain the super-crosslinked polymer; wherein the substrate comprises 2,7-di(n-carbazolyl)-9,9-difluorofluorene or 2,7-di(n-carbazolyl)-9,9-dimethylfluorene; and the reactant comprises dimethoxymethane or 1,4-dimethoxybenzene. The HCP material containing carbazole-fluorenyl in the application is a porous polymer containing N and F atoms, and is an effective CO2 adsorbent. The synthesis method of the material is proposed for the first time, and the material is applied to effective adsorption of CO2.

This invention provides a crosslinked telage base polymer, the resulting telage base gas separation membrane, and its applications, belonging to the field of gas separation membrane technology. The crosslinked telage base polymer is prepared by reacting a homopolymer or copolymer formed by polymerizing at least one diamine monomer and its derivative, or at least one polyamine monomer and its derivative, or at least one diamine monomer and its derivative with at least one polyamine monomer and its derivative, with dimethoxymethane and trifluoroacetic acid. This polymer allows for one-step in-situ crosslinking to form a membrane during polymerization, and the resulting membrane exhibits excellent gas separation performance, with high permeability for O2 and H2, and low permeability for N2 and CH4. It can be used for air enrichment, in-situ nitrogen production, hydrogen enrichment, and hydrogen-methane separation.

This invention belongs to the field of functional materials for clean oil products and new technologies for polycyclic aromatic hydrocarbon (PAH) adsorption, specifically relating to a preparation method and application of phenol-based porous carbon materials. The phenol-based porous carbon adsorbent is obtained by carbonizing an organic porous material polymerized from phenolic hydroxyl compounds. The specific steps are: polymerizing phenol compounds, dimethoxymethane, and anhydrous ferric chloride in a dichloromethane solvent system; filtering, washing, and drying; and finally carbonizing to obtain the phenol-based porous carbon adsorbent. The prepared material can be applied to the adsorption of PAHs, mainly for removing PAHs naphthalene and anthracene from simulated catalytic cracking diesel fuel. Results show that its adsorption capacity for PAHs naphthalene and anthracene can reach up to 96 mg / g and 175 mg / g (500 ppm), respectively. The phenol-based porous carbon adsorbent prepared by this invention has advantages such as simple operation, high adsorption efficiency, good cycle stability, and low cost.

The invention discloses an acid catalyst, modification and a method for preparing methylal through aldol condensation, and particularly relates to a method for preparing methylal through condensation of methanol and formaldehyde by modifying the acid catalyst with a metal oxide and then using the modified acid catalyst for preparing methylal through condensation of methanol and formaldehyde. Different types of acid catalysts are synthesized by adopting an impregnation loading-modification method and are used for the process of preparing methylal by acetalation. The method has the advantages of simplicity in synthesis, easiness in controlling the acid-base property of the catalyst, low reaction temperature, good activity, high selectivity and the like.

The invention relates to the technical field of electrocatalytic reduction of carbon dioxide, and discloses a method for preparing methylal by electrocatalytic reduction of carbon dioxide. According to the method, an H-type electrolytic tank is adopted as a reactor, and the H-type electrolytic tank comprises a cathode chamber and an anode chamber; a working electrode in the cathode chamber is a tin-based catalyst, the cathode chamber and the anode chamber are separated by a proton exchange membrane, and an electrolyte of the cathode chamber and the anode chamber is a sodium perchlorate-methanol solution; the method comprises the following steps: under an electrocatalytic reduction condition, introducing carbon dioxide into the cathode chamber, and carrying out electrocatalytic reduction to obtain methylal; and carrying out electrocatalytic oxidation on methanol in the electrolyte in the anode chamber to obtain methylal. The method for preparing methylal by electrocatalytic reduction of carbon dioxide provided by the invention has the advantages of high methylal selectivity, mild reaction conditions, environmental friendliness and the like.

The present invention discloses a preparation method and application of a nitrogen-rich porous polymer. The preparation method uses cyanuric chloride and p-nitrophenol to synthesize a monosubstituted nitro-phenoxy dichloro-s-triazine, and then reacts with carbazole under the activation of n-butyllithium to obtain a novel nitro-phenoxy dicarbazolyl-s-triazine monomer containing triazine and carbazole groups. Under the catalysis of aluminum chloride and dimethoxymethane for crosslinking, a hypercrosslinked porous polymer is obtained. Further, the nitro group in the polymer backbone is catalytically hydrogenated and reduced by Pd / C to generate amino groups, resulting in a hypercrosslinked nitrogen-rich porous polymer. The preparation method of the present invention is novel and efficient, the reactants are inexpensive and easily available, and the pore rate of the porous polymer is large and the specific surface area is high; the prepared hypercrosslinked nitrogen-rich porous polymer contains abundant nitrogen-containing functional groups such as carbazole, triazine and amino groups, has good intermolecular interaction and electrostatic adsorption effect on dyes such as methyl orange, and has a high adsorption capacity and good removal effect on dyes such as methyl orange.

The application discloses a catalyst for synthesizing dimethoxymethane by one-step oxidation of methanol in liquid phase and a preparation method of the catalyst x The catalyst is CuO derived from Cu-BTC calcination, and is dispersed on a carbon carrier, and the dosage of the Cu-BTC derivative is 5% of the dosage of methanol. The application has the advantages that the metal nodes and ligand structure of MOFs can be adjusted, the specific surface area is large, the structure is various, and the like, the metal oxide obtained after calcination is highly dispersed on the carbon carrier, the metal oxide does not corrode stainless steel equipment, and the like, and the catalyst is simple to prepare and meets the needs of green production.

The invention relates to the technical field of batteries, in particular to a high-voltage wide-temperature-range high-rate lithium battery electrolyte and application. The electrolyte comprises soluble lithium salt and a liquid component, the liquid component comprises a solvent and a diluent; the solvent is prepared from at least two of ethylene glycol dimethyl ether, tetrahydrofuran, 1, 3-dioxolane, diethyl ether, dimethoxymethane, diethylene glycol dimethyl ether and methyl fluorosulfonyl difluoroacetate; and the diluent comprises at least one of bis (2, 2, 2-trifluoroethyl) ether, 1, 2-difluorobenzene, fluorobenzene, and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether. The electrolyte developed by the invention is used in the lithium battery, can stably work at-30 DEG C to 80 DEG C, has excellent electrochemical performance, and promotes formation of a solid interface film which is rich in inorganic matters and low in interface impedance, so that the phase change of a positive electrode structure of the battery is reduced.

The application relates to a silver ion organic adsorbent and a preparation method and application thereof, and belongs to the technical field of composite materials. The silver ion organic adsorbent BPD-POP is generated by the reaction of 4,4-bipyridine and pyrrole, dimethoxymethane, and the structural formula is as follows: the silver ion organic adsorbent can be used for efficiently and selectively adsorbing silver ions from a solution, and has strong recycling and regeneration capacity.

The present invention discloses a preparation method of Chaogel base containing carboxyl group and its anion exchange membrane. The present invention relates to the technical field of ion exchange membrane preparation. The preparation method of the carboxyl group-containing anion exchange membrane includes steps of synthesizing Chaogel base containing carboxyl group, synthesizing polybenzimidazole polymer containing Chaogel base, synthesizing anion exchange membrane polymer containing Chaogel base, and preparing a dense anion exchange membrane containing Chaogel base. The advantages of the present invention are as follows: By reacting specific aminomethylbenzoic acid with dimethoxymethane and using trifluoroacetic acid as a solvent and catalyst, Chaogel base containing carboxyl group is synthesized, which not only improves the purity and stability of the product, but also enables Chaogel base containing carboxyl group to be more effectively introduced into the polybenzimidazole polymer, increases the porosity of the polybenzimidazole polymer, and thus improves the electrochemical performance and mechanical stability of the anion exchange membrane.

The application discloses a cobalt-based Fenton-like catalyst and a preparation method and application thereof. The catalyst is prepared by the following steps: taking pyrrole as a monomer, dimethoxymethane as a crosslinking agent, methanesulfonic acid as a polymerization catalyst and a sulfonating agent, polymerizing by Friedel-Crafts alkylation to obtain a methanesulfonyl functionalized super-crosslinked polymer precursor, and then performing ultrasonic-assisted impregnation to load cobalt salt and high-temperature calcination. The active component of the catalyst is Co9S8 and elemental Co dual phases, which are highly dispersed in a porous carbon carrier in nanoscale, and no external sulfur source is needed. The phase controllable transformation is realized by adjusting the amount of the cobalt salt. The catalyst is used for Fenton-like reaction, and can quickly degrade a plurality of refractory organic pollutants such as sertraline, tetracycline, sulfamethoxazole and rhodamine B in the presence of PMS, and the removal rate reaches 100%. The catalyst has the advantages of simple preparation, high activity, good stability and wide application.

The application discloses a preparation method of a non-metal catalyst for synthesizing propiolactone by a two-step method. The method comprises the following steps: preparing a grafted monomer with a carboxylic acid group by a Friedel-Crafts acylation reaction of an acid anhydride and an aromatic hydrocarbon; preparing a PP matrix by a thermal-initiated grafting reaction of styrene to a PP molecular chain; and connecting the grafted monomer with the carboxylic acid group and the PP matrix by a Friedel-Crafts alkylation reaction by using dimethoxymethane as an alkylation reagent, so as to obtain a PP grafted copolymer catalyst which can be used for synthesizing propiolactone by a two-step method. In the preparation method, no peroxide initiator is used, and the prepared PP grafted copolymer has the advantages of large molecular weight and high carboxyl content, and can be used for catalyzing and synthesizing propiolactone.

The present disclosure relates to a method for preparing sevoflurane and its intermediates. Specifically, the present disclosure relates to a method for preparing sevoflurane, which includes steps such as reacting hexafluoroisopropanol with dimethoxymethane in the presence of a Lewis acid catalyst to prepare methoxymethylidene hexafluoroisopropyl ether. The sevoflurane prepared by this method has high purity and few impurities.

The invention relates to a method for synthesizing 4, 4 '-diphenylmethane dicarbamate by using dimethoxymethane as a methylenating agent. The method comprises the following steps: adding MPC, dimethoxymethane, a reaction solvent and a catalyst into a reactor, and carrying out stirring reaction for 2-6 hours under the conditions of N2 atmosphere and 90-200 DEG C to obtain MDC; the catalyst is sulfuric acid, dodecyl zinc sulfate or a solid catalyst. The method has the advantages of being high in reagent stability, few in by-products, more beneficial to reaction and the like.

Disclosed are an electrolyte solution, a lithium-ion battery, and an electronic product. The electrolyte solution comprises an electrolyte salt and a solvent, wherein the concentration of the electrolyte salt is 0.1-5 mol / L, and the ether solvent comprises one or more of dimethoxymethane, diethoxymethane, 1,2-diethoxyethane, 1,3-dioxolane, 1,3-dioxane, 1,4-dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, tetrahydropyran, diethyl ether, cyclopentyl methyl ether, triethylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether. By selecting an ether solvent having a weak lithium salt dissolution capability, the electrolyte solution enables the formation of contact ion pairs and aggregated ion pairs at a low concentration, reducing co-intercalation behavior in the electrolyte solution, thereby achieving better low-temperature stability, and being suitable for use in a low-temperature environment.

The invention discloses a synthesis method of an antioxidant GM, which comprises the following steps: (1) under the protection of nitrogen, mixing 2-tert-butyl-4-methylphenol and a functionalized acidic ionic liquid, stirring and heating, dropwise adding acrylic anhydride, carrying out heat preservation reaction after dropwise adding, filtering, separating and washing to obtain 2-acrylic acid-2-tert-butyl-4-methylphenyl ester; and (2) under the protection of nitrogen, mixing 2-acrylic acid-2-tert-butyl-4-methyl phenyl ester, dimethoxymethane, 2-tert-butyl-4-methylphenol, the functionalized acidic ionic liquid, the supported phosphotungstic heteropoly acid and methanol, stirring, heating, carrying out reflux reaction, filtering, separating, washing, carrying out reduced pressure distillation, filtering, separating and washing while the mixture is hot, thereby obtaining the antioxidant GM. The functional acidic ionic liquid and the supported phosphotungstic heteropoly acid are adopted, so that the target antioxidant GM with higher purity and yield can be obtained, and better green and environment-friendly development is realized.

The invention belongs to the technical field of porous polymerization adsorption materials, and discloses a preparation method and application of a tyrosine porphyrin-based cross-linked organic porous polymer, and the preparation method comprises the following steps: under the protection of nitrogen, mixing tetraphenylporphyrin, tyrosine, dimethoxymethane, anhydrous ferric chloride and 1, 2-dichloroethane, and carrying out a reaction for 2-4 hours to obtain a reaction solution; then carrying out Friedel-Crafts reaction under heating and stirring conditions to obtain a reaction crude product; sequentially quenching, filtering, washing, purifying and drying the reaction crude product to obtain the tyrosine porphyrin-based cross-linked organic porous polymer which can be applied to uranium extraction in seawater. In the polymer, a porphyrin structure and carboxyl are respectively provided by tetraphenylporphyrin and tyrosine, hydrogen ions on the carboxyl can promote UO2 (CO3) 34-in seawater to be decomposed to generate UO2 < 2 + >, and hydrogen on amino of the porphyrin structure can be replaced by uranyl ions, so that the polymer can be complexed with the UO2 < 2 + >, and the UO2 < 2 + > can be converted into UO2 < 2 + >. Therefore, the effect of fully and quickly adsorbing uranium in seawater is achieved.

The invention belongs to the technical field of materials, and relates to an intermediate, a modified hydrophobic TB polymer and a preparation method and application thereof. The preparation method comprises the following steps: mixing 2, 2-bis (3-amino-4-methylphenyl) hexafluoropropane, dimethoxymethane and trifluoroacetic acid in an ice bath and inert atmosphere, heating for reaction, and after the reaction is finished, adding an ammonia water solution to obtain an intermediate; taking an organic solvent as a reaction solvent, and reacting the intermediate, a halogenated compound RX and a catalyst to obtain the modified hydrophobic TB polymer. A coating prepared from the modified hydrophobic TB polymer not only is environment-friendly, but also has good flexibility and excellent metal adhesive force, and can meet the durability requirement of an anticorrosive coating.

The invention provides a carbon and pollution reducing type super-crosslinking porous purification modifier and a preparation method, the modifier structurally comprises a shell and a core located in the shell, the shell is hydrogenated black T-T, and pores with the pore diameter of 100-200 nm are formed in the shell; and the core is an HCP. The hydrogenated black T-T is a hydrogenated black titanium dioxide-tourmaline composite visible light catalytic material. And the HCP is a carbazolyl five-membered heterocyclic single-heteroatom compound functionalized super-crosslinked porous material. The five-membered heterocyclic single heteroatom compound is pyrrole, thiophene or furan. The catalyst is prepared from the following raw materials in parts by weight: 2 parts of carbazole, 1 part of a five-membered heterocyclic single heteroatom compound, 4 parts of dimethoxymethane and 5 parts of anhydrous FeCl3. 10 parts of tourmaline micro powder, 20 parts of butyl titanate, 14 parts of acetic acid and 2 parts of dopamine hydrochloride. The modifier disclosed by the invention is a core-shell type modifier with high specific surface area, rich surface active sites and a catalytic degradation function, is used for efficient adsorption and catalytic degradation of polycyclic aromatic hydrocarbon, sulfide and volatile organic compounds in asphalt flue gas, and can realize emission reduction and purification of modified asphalt in the whole life cycle.

The present invention discloses a novel process for catalytic gas-phase synthesis of dimethoxymethane and dimethyl carbonate from carbon monoxide, methanol and methyl nitrite, belonging to the technical field of chemical production. This process uses carbon monoxide, methanol and methyl nitrite as raw materials, and the catalyst is a novel and efficient molecular sieve catalyst containing Pd and / or Ti metal. The molecular sieve support is one or a combination of two of Ti-MWW, TS-1, MCM-22, ITQ-1, S-1, and NaY molecular sieves. By using a fixed-bed reactor, under the conditions of a reaction temperature of 80-160 °C and a reaction pressure of 0.1-2.0 MPa, the efficient and green synthesis of dimethoxymethane and dimethyl carbonate is realized, and it has certain industrial application prospects.

The present invention discloses a phosphorus-oxygen functionalized hyper-crosslinked porous polymer material, a preparation method and an application thereof, and belongs to the technical field of chemical adsorption materials. A method for preparing a phosphorus-oxygen functionalized hyper-crosslinked porous polymer material comprises the following steps: using tetraphenylmethane as a raw material, adding liquid bromine, and undergoing a substitution reaction to obtain brominated tetraphenylmethane; using diethyl phosphite and brominated tetraphenyltoluene as raw materials, under the action of a first catalyst, a catalytic reaction occurs to obtain phosphate-modified tetraphenylmethane; the phosphate-modified tetraphenylmethane is hydrolyzed in an acid solution to obtain a crude product of phosphate-modified tetraphenylmethane; and under a protective atmosphere, using 1,2-dichloroethane as a solvent, the crude product of phosphate-modified tetraphenylmethane and dimethoxymethane are subjected to an alkylation reaction under the action of a second catalyst to obtain a phosphorus-oxygen functionalized hyper-crosslinked porous polymer material. The preparation method of the present invention is simple, and the prepared product has a good adsorption effect on uranium.

The invention discloses a fluorine-containing acetal compound and a preparation method thereof. The preparation method comprises the following steps: catalyzing a fluoroalcohol compound to react with dimethoxymethane by using an acid to obtain a reaction crude product; and purifying the reaction crude product to obtain the fluorine-containing acetal compound. Wherein the structural formula of the fluorine-containing acetal compound is Rf-O-CH2-O-Rf, and Rf is selected from fluoroalkyl of which the carbon atom number is C1-C6. According to the method, the reaction efficiency and the conversion rate of the reaction are effectively improved by utilizing the acid to catalyze the reaction in a solvent-free system.

The invention belongs to the technical field of battery materials, and particularly relates to a reference electrode material and a preparation method and application thereof. The reference electrode material provided by the invention comprises a conductive base material and a non-conductive coating, the non-conductive coating is coated on the conductive base material; the non-conductive coating comprises a porous polymer material; the porous polymer material is obtained by reacting a benzene ring-containing aromatic monomer and dimethoxymethane under the catalysis of Lewis acid. When the reference electrode material is used for preparing a lithium battery, an additional diaphragm is not needed, concentration polarization can be effectively reduced, the test potential deviation is small, the accuracy is high, and meanwhile, the reference electrode material is stable, stable and long in service life.

This application provides azeotropic and near-azeotropic compositions of Z-1233zd and a second component selected from the group consisting of methyl formate, dimethoxymethane, HFC-43-10-mee and HFC-245fa. The inventive compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for thermoplastic and thermoset foams, solvents, heat transfer media, gaseous dielectrics, fire extinguishing and suppression agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents. The compositions were modeled based on Vapor-Liquid Equilibria data such as those illustrated in the figures.

The application provides a terguride polymer membrane material with binaphthyl as a skeleton, a preparation method and application thereof, and relates to the fields of polymer materials and gas separation technology. The material is prepared by condensation polymerization of binaphthyl with dimethoxymethane under the catalysis of trifluoroacetic acid, and binaphthyl is used as a diamine monomer. The polymerization reaction has the characteristics of mild reaction condition, high yield and low cost. The obtained terguride polymer is prepared into a gas separation membrane by a solvent evaporation method, and the gas separation membrane has high oxygen permeability and high oxygen / nitrogen selectivity, which exceeds the upper limit of gas separation in 2008. The gas separation membrane material has great development potential.