44 results about "Hexafluorobenzene" patented technology

An electrochemical energy storage device includes a negative electrode which contains a carbon material and has a negative electrode potential of 1.4 V or less relative to a lithium reference when being charged, and a non-aqueous electrolyte solution prepared by dissolving a lithium salt, an ammonium salt, and at least one kind of fluorinated benzene selected among hexafluorobenzene, pentafluorobenzene, 1,2,3,4-tetrafluorobenzene, 1,2,3,5-tetrafluorobenzene, 1,2,4,5-tetrafluorobenzene and 1,2,3-trifluorobenzene, in a non-aqueous solvent.

The invention discloses an environmentally friendly treatment method for hexachlorobenzene, which comprises the following steps: (1) putting hexachlorobenzene and an active potassium fluoride solution organic solvent into a single reactor; Perform pressure test, leak detection and nitrogen replacement in a single reactor; (3) raise the temperature of the single reactor to 200-300°C and increase the pressure to 2.0-3.0MPa; react at the reaction temperature and pressure for 10-15 hours; (4) put the The reaction product in the single reactor is steamed out and collected after condensation; (5) hexafluorobenzene and chloropentafluorobenzene of the rectification separation reaction product; (6) underpressure distillation collects the fluorochlorobenzene (by- product) and an organic solvent; then take out the potassium chloride residue in the single reactor, then re-add in the single reactor after drying the chlorofluorobenzene to continue using. The reaction condition is mild, the conversion rate and yield are high, and practical chemical intermediates can be obtained while reducing pollution, and the application prospect is broad.

The invention discloses a preparation method of hexafluorobenzene and chloropentafluorobenzene. The preparation method of hexafluorobenzene and chloropentafluorobenzene comprises the following steps of: (1) adding raw materials including hexafluorobenzene, active potassium fluoride and a catalyst into a reactor; (2) carrying out nitrogen displacement on the reactor and adding a solvent into the reactor; (3) heating the reactor and stopping heating after a reaction completes; (4) after cooling, switching on an air valve of the reactor, evaporating a reaction product and the solvent in the reactor, and condensing and recycling the reaction product and the solvent; (5) deacidifying the reaction product and the solvent condensed and recycled in the step (4) through an acid separator; (6) separating hexafluorobenzene and chloropentafluorobenzene from the deacidified reaction product and solvent in the step (5) through a rectifying method; and (7) after the reaction product and the solvent in the reactor are completely recycled, cooling the reactor, opening a reaction kettle, and taking out residues such as potassium chloride in the reaction kettle. The preparation method of hexafluorobenzene and chloropentafluorobenzene has the characteristics of convenience for process operation, mildness in reaction, safety and controllability, simplicity in post treatment procedure, less loss and high yield.

The invention discloses a fluorinated polyarylether compound containing column [5] arene and a preparation method thereof. According to the preparation method, a dihydroxy column [5] arene compound and excessive hexafluorobenzene react so as to prepare a para-bisfluorobenzene substituted column [5] arene derivative A, then polycondensation is performed on A, bisphenol fluorene and difluorobenzophenone, so as to obtain the polyarylether compound containing column [5] arene. The obtained polyarylether compound has excellent solubility, thermal stability, oxidization stability, mechanical property and the like, and is important engineering plastics.

The invention provides a pentafluorophenol preparation method. The pentafluorophenol preparation method is characterized by comprising the following preparation steps: adding 500-1000 parts of water, 50-100 parts of sodium hydroxide, 3-10 parts of a hydrolysis catalyst, 100 parts of hexafluorobenzene and 0.1-1 part of dodecyl secondary amine into a high pressure kettle according to parts by weight, sealing the high pressure kettle, raising the temperature to 110-150 DEG C, reacting for 3-8 hours, cooling to the room temperature, filtering, acidizing, extracting with methyl tert-butyl ether, combining an organic phase, distilling to recycle a solvent, and obtaining a crude product of 2,3,4,5,6-pentafluorophenol, adsorbing the crude product of pentafluorophenol in a crude product tank through five rectifying columns, and obtaining a purified product of pentafluorophenol.

A method of preparing a fluorinated aryl or heteroaryl substrate by mixing a quaternary ammonium cyanide and an aryl or heteroaryl substrate substituted with at least one chlorine, bromine, sulfonyl, or nitro group to obtain a mixture, and The mixture is mixed with hexafluorobenzene to obtain the fluorinated substrate.

The invention provides a pentafluorophenol preparation method, which comprises: using hexafluorobenzene and potassium hydroxide as raw materials, adding an appropriate amount of tetrabutylammonium hydrogen sulfate, N-sulfopropyl-3-methylpyridine triflate, N-methyl-2-[(2-methylphenoxy)acetyl]hydrazinium methylthioamide and 2,2,6,6-tetramethylpiperidine-oxynitride to a tert-butyl alcohol aqueous solution with a mass fraction of 80-85%, heating to achieve a slight boiling state, carrying out a reflux reaction for 2-3 h, adding an appropriate amount of water, distilling to recover the tert-butyl alcohol solvent, adjusting the PH value of the remaining aqueous solution by using refined hydrochloric acid to 9-10, adsorbing with a functionalized D101 macroporous adsorption resin, acidifying with refined hydrochloric acid to achieve the PH value of 1-2, layering, distilling the upper layer water phase until no oily substance exists, collecting the distilled product, combining the collected product and the lower layer oil phase, rectifying, collecting the distillate at the temperature of 142-144 DEG C, and cooling to a room temperature to obtain the colorless and transparent crystal pentafluorophenol. According to the present invention, the preparation method has advantages of simple and reasonable process, less side reactions, high reaction yield and high product purity, and can meet the quality requirements for the preparation of the high-quality liquid crystal materials and drugs.

The invention discloses a method for detecting impurities in lithium hexafluorophosphate. The method includes steps of (1), carrying out calibration, to be more specific, adding deuterated reagent solution of hexafluorobenzene and deuterated reagent solution of the lithium hexafluorophosphate into inner and outer tubes of coaxial nuclear magnetic tubes, carrying out fluorine spectrum detection, adding deuterated reagent solution of phosphoric acid and deuterated reagent solution of the lithium hexafluorophosphate into the inner and outer tubes of the coaxial nuclear magnetic tubes and carrying out phosphorus spectrum detection; (2), carrying out measurement, to be more specific, preparing to-be-detected samples with certain concentration from the lithium hexafluorophosphate and deuterated reagents and carrying out fluorine spectrum and phosphorus spectrum detection by the aid of nuclear magnetic resonators. Compared with the traditional method, the method has the advantages that the fluorine-containing and phosphorus-containing impurities in the lithium hexafluorophosphate can be qualitatively and quantitatively detected by the aid of the method, and the method is short in analysis time, easy to implement and high in sensitivity, equipment can be prevented from being damaged by fluorine-containing strong corrosive substances, and the like.

The invention relates to a preparation method for pentafluorophenol. By taking hexafluorobenzene as an initial raw material, pentafluorophenol is prepared through etherification reaction and cracking reaction or by taking hexafluorobenzene as the initial raw material, pentafluorophenol is prepared by virtue of a one-step method. The preparation method provided by the invention does not need high temperature and pressurization, is less in energy consumption, and does not use expensive hydroiodic acid, so that the cost of the raw materials is low. Moreover, wastewater generated by etherification reaction is less, so that the preparation method is environmental-friendly; Cracking is carried out in a solvent, the material stirring effect is good, the reaction temperature is easy to control, and industrialization is easy to implement.