11results about "Fluorine" patented technology

Provided is a fluorine gas production method, which makes it possible to re-use a byproduct hydrogen fluoride, which is a byproduct produced during the production of a fluoride, i.e., a desired component, by reacting a raw material compound with a fluorine gas to fluorinate the raw material compound, as a raw material for the production of a fluorine gas by an electrolysis method. The fluorine gas production method comprises: a fluorination step of producing a reaction mixture comprising a main product fluoride, which is a desired component produced by fluorinating a raw material compound, and a byproduct hydrogen fluoride, which is produced as a byproduct; a separation step of separating the reaction mixture to produce a main product component containing the main product fluoride and a byproduct component containing the byproduct hydrogen fluoride; a purification step of purifying the byproduct component to produce such a recycled hydrogen fluoride component that the concentration of an organic substance contained in the byproduct component is decreased and the concentration of the byproduct hydrogen fluoride is increased; an electrolysis step of carrying out an electrolysis procedure using the recycled hydrogen fluoride component as at least a portion of an electrolyte solution to produce a fluorine gas; and an introduction step of introducing the fluorine gas produced in the electrolysis step into a reaction field for fluorination in the fluorination step.

Disclosed is a solid argyrodite electrolyte doped with fluorine (F). In some embodiments, the argyrodite electrolyte has a formula (I), Li7-nPS6-nHan-xFx (I), wherein Ha is a halogen element other than fluorine (F), 0.02 ≤ x < 0.1, and 1.0 < n < 2.0. In some embodiments, 1.2 ≤ n ≤ 1.6. In some embodiments, 0.02 ≤ x ≤ 0.08. In some embodiments, the ASSB comprising the solid argyrodite electrolyte exhibits an increased CCD and an improved electrochemical performance.

The invention discloses a production method of high-purity fluorine-nitrogen mixed gas, and belongs to the technical field of fluorine chemical industry. The method comprises the following steps: mixing high-purity nitrogen trifluoride and high-purity nitrogen according to a molar ratio of 1: (5.5-10), introducing the mixture into a cracker, reacting at the reaction temperature of 1000-1250 DEG C under the pressure of 0.2-0.7 Mpa until the pressure is not changed any more, cooling the reacted gas through a condenser, introducing the cooled gas into a buffer tank 1, compressing the cooled gas through a compressor, introducing the compressed gas into a de-heavy rectifying tower to remove heavy component impurities, and recovering the heavy component impurities to obtain the high-purity nitrogen trifluoride. And gas extracted from the top of the rectifying tower is introduced into the buffer tank 2, compressed by the compressor and then filled into a steel cylinder. The nitrogen is introduced into the cracking reaction, so that the safety of the reaction can be ensured, meanwhile, the production links of purifying fluorine gas and removing nitrogen impurities after the nitrogen trifluoride is cracked are reduced, the fluorine-nitrogen mixed gas with the preset concentration can be directly produced, the production cost is reduced, the production links are reduced, and the 20% fluorine-nitrogen mixed gas can be directly prepared.

Disclosed is a method for efficiently removing fluorine from a spent lithium battery. The method comprises: mixing aluminum and a sodium hydroxide solution for reaction to obtain a sodium metaaluminate solution; introducing sulfuric acid into the sodium metaaluminate solution, and stirring to react at a certain temperature to obtain a fluorine removal agent; adding a sodium fluoroaluminate seed crystal and the fluorine removal agent into an impurity-removed battery powder leaching solution, introducing a sodium carbonate solution at the same time, performing reaction at a certain temperature, controlling the pH value of a reaction endpoint, and performing solid-liquid separation after the reaction is finished to obtain a fluorine-removed liquid and filter residues; and adding the sodium hydroxide solution into the filter residues for reaction, and performing solid-liquid separation to obtain a filtrate containing fluorine and aluminum, and insoluble residues. According to the present invention, fluorine removal is induced by adding the sodium fluoroaluminate seed crystal; and during fluorine removal, the seed crystal sodium fluoroaluminate is firstly added into the battery leaching solution, and by means of induction of the seed crystal, combination of fluorine and aluminum in the solution can be accelerated to generate sodium hexafluoroaluminate, the reaction time is shortened, the fluorine removal efficiency is improved, and fluorine in the solution can be removed to be lower than 20 mg / L, thereby achieving the purpose of deep fluorine removal.

Disclosed is an apparatus for honeycomb ceramic-based plasma degradation of SF6 in the technical field of sulfur hexafluoride degradation, including a DBD reactor, where a gas supply unit is arranged on a left side of the DBD reactor, a power supply unit is arranged at a bottom of the DBD reactor, a treatment unit is arranged on a right side of the DBD reactor, and the DBD reactor is connected to the gas supply unit via a gas pipe and electrically connected to the power supply unit. The apparatus breaks away from the conventional single-tube structured inner electrode by adopting a novel detachable honeycomb ceramic structure as the inner electrode of the reactor; its porous structure provides good channels for gas flow and distribution; the porous channels facilitate the adsorption of catalysts and decomposition products, effectively promoting the degradation process.

The utility model discloses a device for removing hydrogen fluoride in fluorine gas, which comprises a hydrogen fluoride condensing tower, the upper part of the hydrogen fluoride condensing tower is provided with a nitrogen back-blowing gas inlet pipeline and an F2 gas outlet pipeline, and the lower part of the hydrogen fluoride condensing tower is provided with an F2 gas inlet pipeline and a nitrogen gas outlet pipeline; the F2 gas inlet pipeline is used for enabling F2 to be treated to enter the hydrogen fluoride condensing tower; a blow-off pipeline is arranged at the bottom of the hydrogen fluoride condensing tower; a jacket is arranged on the outer wall of the hydrogen fluoride condensing tower, a refrigerating fluid filling port is formed in the upper part of the jacket, a refrigerating fluid discharging port is formed in the lower part of the jacket, and refrigerating fluid is filled in the jacket; the hydrogen fluoride condensation temperature control device can well control the hydrogen fluoride condensation temperature, avoids overlarge temperature fluctuation caused by direct liquid nitrogen cooling and difficulty in stable control of the hydrogen fluoride condensation temperature, and simultaneously avoids the safety problem caused by fluorine liquefaction due to overlow hydrogen fluoride condensation temperature caused by difficulty in temperature control.

The application discloses a method for recycling F in fluorite waste residue, and belongs to the technical field of fluorite recycling. The method comprises the following steps: mixing and reacting phosphorite slurry doped with fluorite waste residue with a first phosphoric acid solution and an acid solution containing sulfuric acid, then performing crystal growing treatment, and performing solid-liquid separation to obtain phosphogypsum and finished product phosphoric acid; the mass ratio of the fluorite waste residue contained in the phosphorite slurry to the phosphorite powder is 0.01:100 to 4:100. The phosphogypsum and the finished product phosphoric acid obtained by the method both contain F, and the effect of recycling F in fluorite is achieved.

The utility model provides industrial equipment for producing fluorophosgene, which comprises a reactor, a reactor, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe, the first gas inlet mechanism comprises a first gas inlet pipe, a distributor and a plurality of groups of nozzles with different lengths, the distributor is arranged in the reaction cavity, the first gas inlet pipe is communicated with the distributor, the distributor is sequentially provided with a plurality of annular gas inlet areas from outside to inside, and the length of the nozzles arranged on the gas inlet area on the outer side is smaller than that of the nozzles arranged on the gas inlet area on the inner side; the second gas inlet mechanism is communicated with the reaction cavity; and the exhaust mechanism is communicated with the reaction cavity. According to the equipment provided by the utility model, the length of the nozzles arranged on the outer side gas inlet area is smaller than that of the nozzles arranged on the inner side gas inlet area, the longer nozzles are arranged at the high-pressure position of the distributor, and the shorter nozzles are arranged at the periphery of the low-pressure position of the distributor, so that the temperatures of the reaction are relatively balanced; the generation of a by-product CF4 due to overhigh local temperature or local excessive fluorination caused by violent reaction is avoided.

The present application relates to the field of comprehensive utilization of wet-process phosphoric acid resources and preparation of new energy materials, and discloses a method for selectively recovering fluorine from wet-process phosphoric acid and preparing lithium difluorophosphate. By adding boric acid to the wet-process phosphoric acid, the fluorine species is converted, and tri-octylamine organic extraction system is used to selectively separate fluorine and phosphorus, and then lithium fluoroborate is prepared by back extraction, and further reacts with anhydrous oxalic acid to generate lithium difluorophosphate, and after recrystallization, battery-grade lithium difluorophosphate with a purity of 99.7% or above is obtained. The method realizes efficient recovery and high-value conversion of by-product fluorine resources in wet-process phosphoric acid, has the advantages of simplified process, high extraction selectivity, high resource utilization rate and significantly improved product added value, and can be used for preparation of lithium ion battery electrolyte.

Direct Board-to-Board Bonding Method. The invention relates to a method for directly bonding a first microelectronic device (100) to a second microelectronic device (200), comprising supplying a first device having a first flat surface (110) and a second device having a second flat surface (210), treating at least the first and second surfaces with a plasma gas comprising at least a first fluorinated gas having an atomic percentage F of fluorine, transferring the first and second devices to bonding equipment, immersing the first and second surfaces in a bonding atmosphere (1), and bonding the first and second surfaces under the bonding atmosphere. The atomic percentage F of fluorine and the relative humidity RH are controlled synergistically so that a bonding velocity Vc is less than or equal to 15 mm / s and more specifically less than 10 mm / s.Figure for the abridged version: Fig.4.

The invention relates to a liquid fluorine purification rectifying tower which comprises a tower top condenser, a rectifying tower kettle and a rectifying tower body arranged on the rectifying tower kettle, the rectifying tower kettle and the rectifying tower body are both made of titanium steel alloy materials, and the tower top of the rectifying tower body is connected with the input end of the tower top condenser. The tower top of the rectifying tower body is provided with a tower top temperature measuring port, the tower top temperature measuring port is provided with a temperature measuring piece, and the temperature measuring piece is interlocked with a refrigerant inlet valve and a refrigerant outlet valve of a tower top condenser. The rectifying tower is made of a titanium steel alloy material, so that the service life of the tower can be prolonged, the maintenance cost is reduced, and major safety and environmental protection hidden dangers caused by improper material selection are solved; the efficiency and stability of the rectifying tower are greatly improved, energy consumption and emission are reduced, and the safe, environment-friendly and efficient effects are achieved.