57 results about "Fluoroacetone" patented technology

The present invention discloses a bionical rare earth organic complex light conversion agent and a preparation method thereof, and the composition of the bionical rare earth organic complex light conversion agent is as follows: SmM<1-x>(TTA)L. The light conversion agent chooses the easily obtained, cheap samarium ion as a central ion, lanthanum La<3 plus>, gadolinium Gd<3 plus> and yttrium Y<3 plus> as heterocaryotic central ions, organic compound (Alpha-thenoyltrifluoroaceton) with the lowest excited triplet level matching the Sm<3 plus> excited level as a ligand and o-phenanthroline, 2,2'-bipyridyl, trioctylphosphine oxide, triphenylphosphine oxide, etc. as second ligands. The method for preparing the light conversion agent includes the following steps: dissolution, stirring and reaction, deposition, filtration, washing, drying, grinding and finished product, and the appearance of the product is white or light yellow. The light conversion agent provided by the present invention can convert ultraviolet light into red light with a wavelength between 620nm and 660nm, the emitting efficiency is high, the color purity is high, and the strongest emission wavelength is close to the position of the maximum absorption peak of chlorophylls (a, b), so the light conversion agent can meet the physiological requirement of the photosynthesis of plants.

The present invention provides methods for producing (S)-1,1,1-trifluoro-2-propanol, which include the step of reacting an enzyme of any one of alcohol dehydrogenase CpSADH, alcohol dehydrogenase ReSADH, carbonyl reductase ScoPAR, (2S,3S)-butanediol dehydrogenase ZraSBDH, carbonyl reductase ScGCY1, tropinone reductase HnTR1, tropinone reductase DsTR1, or alcohol dehydrogenase BstADHT, a microorganism or a transformant strain that functionally expresses the enzyme, or a processed material thereof, with 1,1,1-trifluoroacetone. The present invention also provides methods for producing (R)-1,1,1-trifluoro-2-propanol, which include the step of reacting alcohol dehydrogenase PfODH, a microorganism or a transformant strain that functionally expresses the enzyme, or a processed material thereof, with 1,1,1-trifluoroacetone.

A method for preparing an alkaline anion exchange membrane based on a branched oxygen-free main chain belongs to the field of battery membrane materials. The method comprises: firstly, dissolving 1,3,5-triphenylbenzene, N-methylpiperidone, biphenyl and trifluoroacetone in a solvent, adding an catalyst under an ice bath condition, and obtaining a polymer main chain having a branching degree of 1 to5 after a reaction; secondly, dissolving and reacting N-methylpiperidine and 1,6-dibromohexane in ethyl acetate, and then processing an obtained product ionization reagent; finally, performing the ionization of the polymer membrane main chain, casting membrane, and alkali treatment to obtain an anion exchange membrane. The method reduces the risk that hydroxide attacks the membrane by using the oxygen-free main chain, thereby enhancing the alkali resistance of the anion exchange membrane. The branched structure provides a certain free volume to help build ion transmission channels, and the ion reagent can promote the formation of ion clusters as well as the separation of hydrophilic and hydrophobic microphases, thereby significantly improving the conductivity of the membrane.

The invention discloses a preparation method of a cross-linked polyfluorene piperidine anion exchange membrane. The method comprises the following steps: dissolving 9,9-dimethyl fluorene, N-methyl piperidone and trifluoroacetone in dichloromethane to obtain a homogeneous solution, adding trifluoroacetic acid and trifluoromethanesulfonic acid as catalysts, performing reacting for 24-36 hours at 0-10 DEG C in a nitrogen atmosphere, performing precipitating with a K2CO3 aqueous solution, and performing washing with deionized water to obtain light yellow solid polyfluorene piperidine polymer powder; dissolving the obtained polyfluorene piperidine and iodomethane in chloroform, performing heating and refluxing for 24-36 hours under a dark condition and a nitrogen atmosphere, then pouring a reaction solution into diethyl ether to precipitate, and performing washing with deionized water to obtain a quaternized polyfluorene piperidine polymer; and dissolving the obtained solution in dimethyl sulfoxide, adding a brominated amino siloxane cross-linking agent solution, performing reacting for 12-24 hours at 50-60 DEG C, adding iodomethane, performing reacting for 24-48 hours at 30-40 DEG C in a dark nitrogen atmosphere, adding ethanol, performing standing for 24-36 hours at room temperature, performing standing for 12-24 hours at 80 DEG C, standing for 3-6 hours at 100 DEG C, and performing standing for 1-3 hours at 120 DEG C to obtain the cross-linking type polyfluorene piperidine anion exchange membrane.

The invention relates to a preparing method of 3-fluoroacetone acid. Diethyl oxalate and fluoro ethyl acetate are adopted as raw materials, NaH is adopted as a strong base catalyst to conduct an ester condensation reaction to obtain 2-fluo-3-oxo diethyl succinate, wherein the yield rate is 84.6%, and the gas phase chromatographic detection purity is 99.9%. 2-fluo-3-oxo diethyl succinate is put into an acid solution, and then through hydrolysis and decarboxylation reactions, and then through distillation and water removal, a coarse product is obtained, and finally through a sublimation method, 3-fluoroacetone acid is obtained, the yield rate is 85.4%, the liquid phase chromatographic detection purity is 99.9%, and the total yield through the two steps is 72%. The reaction technology is simple in condition, reactions are all conventional reactions under the normal pressure, the operation is simple and convenient, the raw materials are easy to obtain, and the product cost is low.

The invention discloses a method for preparing 1,1,1-trifluoroacetone, which is used for preparing the 1,1,1-trifluoroacetone by reacting 4,4,4-trifluoroethyl acetoacetate and organic acid in an anhydrous state. Compared with the prior art, the method overcomes the risk in exploding trifluoroacetone hydrate easily generated in a water reaction environment in air, and has a safe and reliable production process; meanwhile, both the product purity and the yield are higher; furthermore, the organic acid as a raw material can be recycled; the method is low in three-waste pollution, low in production cost and simple to operate; and the prepared 1,1,1-trifluoroacetone can be used for producing a plurality of important fine chemical intermediates.

The invention provides a method for preparing 1,1,1,3,3,3-hexafluoroacetone through gas-phase catalysis, relating to the field of organic synthesis. The method comprises the following reaction steps: (1) introducing 1,1,3,3-tetrafluoro-1,3-dichloroacetone gas and hydrogen fluoride gas into a fixed bed type reactor with a supported catalyst, and reacting; and (2) rectifying the gas discharged from the fixed bed type reactor to obtain the 1,1,1,3,3,3-hexafluoroacetone. According to the method for preparing 1,1,1,3,3,3-hexafluoroacetone through gas-phase catalysis, the tetrafluorodichloroacetone is used as the raw material; and the process is simple and environment-friendly, low in cost and high in yield.

The invention relates to a cage type oligomeric silsesquioxane prepared by taking BipySi as supplement bodies and a rare earth luminescent material prepared from cage type oligomeric silsesquioxane. By taking 1,3,5,7,9,11,14-heptaisobutyl tricyclic[7,3.3.15,11] heptatrisiloxane-intra-3,7,14-triol as a matrix, alpha-thenoyl trifluoroacetone silanized derivative, a dipyridine silanized derivative and a terpyridyl silanized derivative as supplement bodies, the supplement bodies react with the matrix in form of supplements to form integrated novel cage type oligomeric silsesquioxane. The cage type oligomeric silsesquioxane is combined with rare earth elements to form a POSS/rare earth ion luminescent material. The obtained rare earth ion luminescent material/POSS is rich in luminescent color, high in color purity, long in fluorescent lifetime (0.5-1.5ms), high in quantum efficiency (20) and strong in thermal stability (350 DEG C) and light stability, is a valuable optical material and can be applied to the field of display and development, light source, X-ray intensifying screen and the like.

The invention discloses a preparation method of 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride. The method comprises the following steps of (a) accurately weighing N-alkyl phthalimide and a catalyst, stirring and raising the temperature to 90-110 DEG C, and dissolving; slowly dropwise adding hexafluoroacetone hydrate, raising the temperature to 100 to 130 DEG C, reacting for 22 to 80 hourswhile stirring, and discharging to obtain 4, 4-(hexafluoroisopropyl) bis (N-alkyl phthalimide); (b) adding alkali to hydrolyze, and acidifying to obtain hexafluorotetracid; and (c) dehydrating to obtain the 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride. According to the preparation method, the hexafluoroacetone and specific N-alkyl phthalimide directly react under the action of a specific catalyst to prepare hexafluorodianhydride, the step of oxidizing methyl in a traditional method is omitted, the use of metal oxides is avoided, the environmental pollution is small, a normal-pressure reaction is adopted, a high-pressure reaction is not needed, the reaction risk is reduced, the purity of the prepared 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride is high, and the yield reaches 87% or above.

The invention discloses a method for analyzing and determining the content of hexafluoroacetone. Hexafluoroacetone is subjected to gas chromatographic analysis, the content of hexafluoroacetone is directly and quantitatively determined by an area normalization method, and chromatographic conditions during detection are as follows: a chromatographic column is a non-polar column; the temperature ofa chromatographic column is 40-200 DEG C; the temperature of a sample inlet is 60-140 DEG C; the temperature of a detector is 250 to 300 DEG C; the carrier gas is high-purity nitrogen; the flow rate of carrier gas is 0.8 mL/min to 1.5 mL/min; the split ratio is (30-100): 1; the operation time is 20 min, and the pre-column pressure is 13 Psi; and the sample size is 0.1 to 1.0 mL. And the detector is a hydrogen flame detector. The chromatographic analysis method for directly and quantitatively determining the purity of hexafluoroacetone in production has the advantages of reliable result, simpleoperation and low test price, is suitable for routine analysis of enterprises, has high practical value, and can be used for guiding the research and production process detection of hexafluoroacetone.

The invention discloses a cable outer layer insulation material and a preparation method thereof. The cable outer layer insulation material is prepared by using the following components in parts by weight: 78-95 parts of polyethylene glycol terephthalate, 26-33 parts of polyvinyl butyral, 15-25 parts of bisphenol hexafluoroacetone diglycidyl ether, 3-8 parts of tourmaline powder, 2-6 parts of hexamethylcyclotrisiloxane, 3-5 parts of bis-(phenyl dimethyl siloxane) methylsiliconate, 1-2 parts of polysebacic urea, 0.02-0.5 parts of benzoyl peroxide butyl acetate and 0.01-0.5 parts of copper chloride. The invention further provides a preparation method for the cable outer layer insulation material.

The invention discloses a high-sensitivity rare earth doped time-resolved fluorescent nanoparticle, and a preparation method and application thereof, and belongs to the technical field of chemistry and materials. According to the fluorescent nanoparticle, LaF3 is used as a hexagonal phase matrix material, Eu<3+> is used as a luminescence center to be doped into a hexagonal phase LaF3 matrix, and a sensitizer 2-thenoyltrifluoroacetone and 1, 10-phenanthroline are coordinated with Eu<3+>. The method comprises the following steps: dropwise adding an NH4F aqueous solution into a mixed aqueous solution of LaCl3 and EuCl3, and then adding an alcoholic solution of 2-thiophenoyl trifluoroacetone and an alcoholic solution of 1, 10-phenanthroline. According to the invention, TTA is adopted as the sensitizer, Phen is adopted as a non-water auxiliary ligand, resonance energy transfer between TTA and Eu<3+> ions is utilized, and Phen replaces a fluorescence quenching group -OH to generate strong coordination with the Eu<3+> ions, so that the fluorescence of the nanoparticles is effectively enhanced.

The invention belongs to the field of fluoride preparation devices, and particularly relates to a preparation device of a hexafluoroacetone hydrate, which comprises an HFPO storage tank, a reaction tank and a deionized water tank which are connected in sequence. The reaction tank is filled with a catalyst; a gas outlet in the upper end of the HFPO storage tank is communicated with a gas inlet in the lower end of the reaction tank; a gas outlet formed in the upper end of the reaction tank is communicated with the deionized water tank through a pipeline; an inverted funnel is arranged at the front end of the pipeline; and a liquid outlet is formed in the lower end of the deionized water tank. According to the preparation device of the hexafluoroacetone hydrate, the prepared hexafluoroacetonecan directly generate the hexafluoroacetone hydrate, intermittent collection can be conducted on the hexafluoroacetone hydrate through the design of a partition plate, and the production efficiency is improved.