13 results about "Fluoroacetone" patented technology

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to trifluoropyruvic acid and a method for preparing trifluoropyruvic acid from trifluoroacetone. The method comprises the following steps: dissolving trifluoroacetone in a chlorinated solvent, adding a catalyst, introducing chlorine, carrying out a closed reaction, controlling the reaction temperature, cooling to room temperature after the reaction is finished to obtain a 1, 1, 1-trichlorotrifluoroacetone reaction mixture, adding an alkali liquor to carry out a hydrolysis reaction, separating out a water phase after the reaction is finished, and drying to obtain the trifluoropyruvic acid. And continuously applying the chlorination solvent, continuously adding the acid into the water phase to adjust the pH value to 3-4 to obtain a trifluoropyruvic acid water solution, finally extracting and pulping to obtain a wet trifluoropyruvic acid product, and purging with air to obtain a pure trifluoropyruvic acid product. According to the method for preparing trifluoropyruvic acid from trifluoroacetone, the raw materials are easy to obtain, the process is stable, the yield is high, the cost is low, and the invention further provides a trifluoropyruvic acid product.

The invention belongs to the technical field of preparation of organic chemicals, and particularly relates to 2-methyl-5-trifluoromethyl furan and a preparation method thereof. The preparation method comprises the following steps: adding a solvent into trifluoroacetone, adding alkali under an ice bath condition, adding 1-chloro-2-methyl ethylene oxide, reacting at room temperature, adding acid, reacting at 40-60 DEG C to complete a dehydration reaction, then adding alkali for aromatization, continuing to complete an aromatization reaction, adding water to extract a reaction system, taking an organic phase, filtering, washing and drying to obtain the 1-chloro-2-methyl ethylene oxide. And rectifying to obtain the 2-methyl-5-trifluoromethyl furan. According to the 2-methyl-5-trifluoromethyl furan and the preparation method thereof provided by the invention, the reaction conditions are mild, the steps are simple, and the prepared 2-methyl-5-trifluoromethyl furan is high in yield and suitable for industrial production.

This invention provides a method and system for preparing trifluoropyruvate esters using a centrifugal method, relating to the field of organofluorine chemical synthesis technology. The centrifugal method for preparing trifluoropyruvate esters includes: circulating and spraying an alcohol-ether solution containing an aldehyde compound and a catalyst in a centrifugal reactor, and introducing hexafluoropropylene oxide to catalyze the reaction between the aldehyde compound and hexafluoropropylene oxide, yielding a reaction product; separating the reaction product into gas and liquid phases, and separating the gas phase product by distillation to obtain trifluoropyruvyl fluoride and hydrofluorocarbons; and esterifying the trifluoropyruvyl fluoride and alcohol in a microchannel reactor to obtain trifluoropyruvate esters. The centrifugal method for preparing trifluoropyruvate esters described in this invention has advantages such as simple and readily available raw materials, mild reaction conditions, and high conversion and yield.

The invention provides an electrochromic polymer, an electrochromic film and a preparation method of the electrochromic polymer. The structural formula of the electrochromic polymer is shown in the formula I. In the formula I, R is a C4-C50 alkane chain; n is the degree of polymerization, and n is 20-300; m is 0-2, the number-average molecular weight Mn of the electrochromic polymer is 5000-20000 Da, and the polydispersity coefficient D of the electrochromic polymer is 3.0-10.0. According to the invention, an aromatic hydrocarbon carbazole derivative and trifluoroacetone are used as monomers, and the electrochromic polymer is prepared by one step through Friedel-Crafts hydroxyl alkylation condensation polymerization catalyzed by Lewis acid.

This invention belongs to the field of organic chemical preparation technology, specifically relating to trifluoropyruvate and a method for preparing trifluoropyruvate from trifluoroacetone. The method for preparing trifluoropyruvate from trifluoroacetone according to this invention involves: firstly, dissolving trifluoroacetone in a chlorinating solvent, then adding a catalyst, introducing chlorine gas, and sealing the reaction, controlling the reaction temperature, and cooling to room temperature after the reaction to obtain a 1,1,1-trichlorotrifluoroacetone reaction mixture. An alkaline solution is added to initiate a hydrolysis reaction. After the reaction, the aqueous phase is separated, and the chlorinating solvent is reused. Acid is added to the aqueous phase to adjust the pH to 3-4 to obtain an aqueous trifluoropyruvate solution. Finally, extraction and slurrying are performed to obtain wet trifluoropyruvate, which is then purged with air to obtain pure trifluoropyruvate. The method for preparing trifluoropyruvate from trifluoroacetone provided by this invention uses readily available raw materials, has a stable process, high yield, and low cost. This invention also provides a trifluoropyruvate product.

The invention discloses a method for synthesizing high-purity bisphenol AF, which comprises the following reaction steps: taking phenol and hexafluoroacetone trihydrate as raw materials, taking pentacyanocyclopentadiene as a catalyst, and heating and reacting in a protective atmosphere; after the reaction is finished, adding a NaOH aqueous solution into the reaction liquid to adjust the pH to 7, and extracting and separating the liquid by using dichloromethane; and evaporating the dichloromethane extract containing bisphenol AF to dryness to obtain a bisphenol AF crude product, and recrystallizing the bisphenol AF crude product with methyl tert-butyl ether to obtain a bisphenol AF pure product. The catalyst adopted in the invention avoids the defect of insufficient acidity of a conventional catalyst while avoiding a high-corrosivity catalyst, so that the production operation is mild, and the reaction production equipment is conventional. The used catalyst is high in boiling point, stable in structure, capable of being recycled and environmentally friendly, and a new technical method is provided for industrial production of high-quality bisphenol AF.

The invention belongs to the technical field of electrochromic materials, and discloses an indole derivative electrochromic polymer, a preparation method of the indole derivative electrochromic polymer, an electrochromic polymer film and application of the electrochromic polymer film. A soluble high-performance electrochromic polymer with high transparency in a neutral state and green oxidation state is prepared through Friedel-Crafts hydroxyl alkylation condensation polymerization of an indole derivative and trifluoroacetone. The polymer film is colorless and transparent in a neutral state, reversibly turns into green under the driving of 1.2 V low voltage, and shows high optical contrast and relatively good cycling stability, so that the Friedel-Crafts hydroxyl alkylation polycondensation reaction can be used as a general means for constructing a neutral transparent non-conjugated electrochromic polymer. The prepared polymer has excellent processability, and has wide application prospects in the fields of energy-saving displays, static information display, dynamic information encryption, military camouflage and the like.

The invention discloses a silicon material treating agent with a fluorescent tracing function and a preparation method thereof. The treating agent comprises a basic treating agent and a fluorescent agent, wherein the basic treating agent is prepared from nine components including hydroxyl-terminated polydimethylsiloxane, methyl phenyl silsesquioxane resin, n-heptane, ethyl acetate and the like according to a specific mass ratio; the fluorescent agent is a europium-2-thiophenoyl trifluoroacetone-triphenylphosphine oxide complex, the fluorescent agent and new ethyl acetate are firstly mixed and stirred uniformly, then the mixture is added into the basic treatment agent and stirred uniformly, and the mass ratio of the fluorescent agent to the ethyl acetate to the basic treatment agent is (0.5-1.5): (8-10): (1900-2100). The treating agent disclosed by the invention shows red fluorescence under 365nm purple light, can be used for intuitively detecting missing brushing, and has an activation effect on the surface of a silicon material, so that the shear strength and the peel strength of the treated silicon material and a double-sided adhesive tape are high, and the bonding requirement of a new energy power battery buffer material is met.

The invention relates to a rare earth fluorescent probe and an ammonia aniline sensing application thereof. The invention discloses a novel rare earth europium complex luminescent material, the molecular formula of the complex is Eu (NTA) 3 (PBO), and in the formula, NTA is naphthoyl trifluoroacetone; in the formula, PBO is a neutral heterocyclic ligand 2-(2-pyridine) benzoxazole. The compound is prepared by carrying out coordination reaction on europium nitrate, NTA with three times of equivalent weight and PBO ligand with one time of equivalent weight. The luminescent material disclosed by the invention is very good in luminescent property; the luminescent material has selective response to ammonia gas, aniline and trimethylamine, has high sensitivity, and quickly shows the sensing response characteristic of fluorescence quenching after being placed in an atmosphere containing amine VOCs (Volatile Organic Compounds); the material has good solubility and stability, and can be easily prepared into a paper-based or solid substrate-based fluorescence sensing film device, an inert substrate doped composite sheet device, a ratio fluorescence sensing device or a fluorescence sensing device. The devices also rapidly show fluorescence sensing performance of rapid fluorescence quenching response and sensitive recognition in ammonia gas, aniline or trimethylamine atmosphere, and can be applied to detection of amines.

The present application belongs to the technical field of organic chemical preparation, and particularly relates to 2-methyl-5-trifluoromethyl furan and a preparation method thereof. The preparation method comprises the following steps: adding a solvent into trifluoroacetone, adding a base under ice bath condition, adding 1-chloro-2-methyl epoxide, reacting at room temperature, adding an acid, completing a dehydration reaction under the condition of 40-60 DEG C, then adding a base for aromatization, continuously completing an aromatization reaction, extracting the reaction system by adding water, taking an organic phase, and rectifying to obtain 2-methyl-5-trifluoromethyl furan. The 2-methyl-5-trifluoromethyl furan and the preparation method thereof have the advantages of mild reaction condition, simple steps, high yield of the prepared 2-methyl-5-trifluoromethyl furan, and suitability for industrial production.

The invention provides a dimerized carbazole type electrochromic polymer and a preparation method and application thereof, the structural formula of the dimerized carbazole type electrochromic polymer is as shown in formula I. In the formula I, R is a C6-C40 alkane chain or alkoxy hydrocarbon chain; n is the degree of polymerization, and n is 10-1000; the number-average molecular weight Mn of the dimerization carbazole type electrochromic polymer is 1000 to 5000 Da, and the polydispersity coefficient D of the dimerization carbazole type electrochromic polymer is 1.0 to 4.0. According to the preparation method, dimerized carbazole and trifluoroacetone are taken as monomers, and the dimerized carbazole type electrochromic polymer is prepared in one step through Friedel-Crafts hydroxyl alkylation condensation polymerization catalyzed by Lewis acid; the method is high in atom economy and mild in reaction condition, the carbazole monomer does not need to be pre-functionalized, and the synthesis steps are simplified.

The present application belongs to the technical field of pharmaceutical chemistry, and particularly relates to a catalytic preparation method of a hexafluoroacetone intermediate, hexafluoroisopropanol. The present application takes acetone and a fluorine source as raw materials, and obtains hexafluoroacetone under the action of a multi-element catalyst, then directly separates to obtain a hexafluoroacetone product. Through the preparation technology of the present application, a high-purity hexafluoroacetone intermediate can be obtained at low cost, high safety and high efficiency.

The invention relates to the technical field of fluorine compound preparation, and discloses an efficient synthesis method of hexafluoroacetylacetone. The efficient synthesis method of hexafluoroacetylacetone comprises the following steps: step 1, adding a metal compound into a solvent A, dropwise adding trifluoroacetone and ethyl trifluoroacetate, reacting, and distilling out the solvent A to obtain a reaction mixture; 2, cooling the reaction mixture obtained in the step 1, adding a solvent B, carrying out suction filtration, washing the obtained filter cake with the solvent B, adding inorganic acid, stirring, and distilling to obtain a product, namely hexafluoroacetylacetone; according to the efficient synthesis method of hexafluoroacetylacetone, the product yield reaches 90% or above, the reaction period is shortened to 4 days from 14 days, the production cost is reduced by about 50%, and the method has wide application prospects.