46results about "Sulfur and halogen compounds" patented technology

The invention belongs to the technical field of chemical engineering and fine fluorine chemical synthesis, and particularly relates to a preparation method of sulfuryl fluoride chloride. According to the preparation method, through the synergistic effect of a gas-liquid reaction system and a closed-loop circulation system, a tertiary amine hydrofluoric acid adduct (such as Et3N.nHF, n = 2-6) is used as a fluorinating reagent, sulfuryl fluoride chloride is generated through a rapid cross-flow reaction in excessive sulfuryl chloride (SO2Cl2) under the conditions that the temperature is 65-100 DEG C and the pressure is 0.5-2.0 MPa, and a liquid-phase byproduct tertiary amine hydrochloride hydrogen fluoride adduct (such as Et3N.HCl. (n-1) HF) is used for preparing the sulfuryl fluoride chloride. Supplementing hydrogen fluoride to regenerate the catalyst and recycling; and after a gas-phase product is pressurized, rectified and purified by a light component removal tower and a heavy component removal tower, totally returning a light component (Cl2 / SO2) and a heavy component (SO2Cl2) to a synthesis system for recycling. According to the method, the reaction temperature, the reaction pressure, the liquid phase dispersion degree and the contact time are accurately controlled, so that the reaction product generates SO2FCl with high selectivity, and the byproduct (R3N.HCl. (n-1) HF) is kept in a liquid phase, so that the reaction can be continuously carried out, and conditions are created for subsequent treatment.

The invention discloses a solvent removal process and a crude product post-treatment method in isophthaloyl chloride / paraphthaloyl chloride production, and belongs to the technical field of chemical processes. A three-stage gradient condensation system is adopted, circulating water, chilled water and chilled saline water are respectively introduced, the recovery rate of thionyl chloride is improved, thionyl chloride is prevented from entering a subsequent vacuum unit, the equipment failure rate is reduced, and the annual overhaul frequency is reduced. A top condenser is arranged, hot water at the temperature of 50-55 DEG C (suitable for producing isophthaloyl dichloride) or hot water at the temperature of 85-90 DEG C (suitable for producing paraphthaloyl dichloride) is adopted as a cooling medium, so that isophthaloyl dichloride / paraphthaloyl dichloride is efficiently captured, and coagulum is thoroughly prevented from entering a subsequent system and blocking equipment and pipelines.

The present invention relates to aliovalently substituted argyrodite-type solid electrolyte solid electrolytes. These solid electrolytes display and increased ionic conductivity.

The application belongs to the technical field of high-purity sulfur hexafluoride preparation, and particularly relates to a method for preparing high-purity sulfur hexafluoride from sulfur recovered in a preparation process of hydrofluoric acid. The method for preparing fluorine-containing active ions through electrolysis of hydrofluoric acid can directly utilize the fluorine-containing active ions to fluorinate sulfur to generate sulfur hexafluoride gas without removing sulfur, and high-purity sulfur hexafluoride gas is prepared through rectification and purification, so that the recycling of sulfur resources is realized, the production efficiency and product purity are improved, and the energy consumption and environmental pollution are reduced.

The invention provides a method for preparing sulfuryl fluoride without loss by using a catalyst. According to the method, a tertiary amine catalyst is used for catalyzing a liquid phase reaction with sulfuryl chloride (or sulfur dioxide and chlorine) and hydrogen fluoride as raw materials, and sulfuryl fluoride gas and hydrogen chloride gas are obtained. By controlling the amount of hydrogen fluoride added into the system, the tertiary amine is not separated out as a solid precipitate while being used as a catalyst, but still exists in a liquid phase reaction system for cyclic utilization, so that the reaction can be continuously carried out without continuously adding the catalyst. According to the method, the production cost of the sulfuryl fluoride is reduced, the purity and yield of the sulfuryl fluoride are improved, waste needing follow-up treatment is not generated, and the method is suitable for industrial production.

Belonging to the technical field of sulfur hexafluoride gas recovery, the invention provides an automatic recovery device for sulfur hexafluoride gas, which comprises an operation table, one side of the top of the operation table is fixedly connected with a first purification box, the other side of the top of the operation table is fixedly connected with an oilless compressor, four corners of the bottom of the operation table are fixedly connected with support legs, and one side of the bottom of the operation table is fixedly connected with a support plate. A storage tank is fixedly connected to one side of the supporting plate, and a waste stripping assembly is arranged on the side, away from the oilless compressor, of the first purification box. According to an existing automatic recycling device for the sulfur hexafluoride gas, the SF6 gas directly enters the first purification box, dust and other waste in the SF6 gas are not pre-stripped, then excessive dust and other waste enter the first purification box, a solution in the first purification box needs to be exchanged in advance, and the cost is reduced. And the liquid change period of the first purification box is greatly shortened.

The invention discloses a separation and recovery device for sulfur hexafluoride gas, which comprises a recovery box, a pretreatment assembly which is arranged on the recovery box and is used for preliminarily collecting mixed gas, and a separation assembly which is arranged outside the recovery box and is communicated with the pretreatment assembly, the membrane separation part is used for preliminarily separating sulfur hexafluoride and air, the gas-liquid separator is used for removing non-condensable gas, the membrane separation part is communicated with the gas-liquid separator, and an oil-free compressor, a heat exchanger and a refrigerating machine are sequentially communicated between the membrane separation part and the gas-liquid separator. The sulfur hexafluoride recycling device has the beneficial effects that by arranging the recycling assembly, other components in mixed gas containing sulfur hexafluoride can be removed, the sulfur hexafluoride storage amount of the recycling box is increased, a large-size collecting container does not need to be arranged in the recycling box, more sulfur hexafluoride can be stored, the size is smaller than that of a traditional collecting device, and the recycling box is convenient to use. The carrying is more convenient.

The invention discloses a sulfur hexafluoride recovery and degradation combined process for high-voltage insulation equipment, and relates to the technical field of sulfur hexafluoride recovery, and the sulfur hexafluoride recovery and degradation combined process comprises the following steps: (1) primarily recovering sulfur hexafluoride gas in a cavity of the high-voltage insulation equipment; (2) after the preliminary recovery is completed, filling air into the equipment cavity; (3) extracting the residual mixed gas of sulfur hexafluoride gas and air in the cavity, and degrading; (4) repeating the step (2) and the step (3) for one or more times, and opening the equipment for maintenance; the device breaks the situation that the lower the pressure is in the recovery process, the longer the recovery and air exhaust time is; and through a one-time or multi-time gas replacement mode, residual gas after recovery in the cavity is taken out as much as possible and degraded within limited time until emission reduction and harmlessness are achieved.

The invention discloses a comprehensive dehumidification system for an SF6 insulation high-voltage experiment tank, and relates to the technical field of high-voltage test equipment and gas insulation, and the device comprises an experiment tank, a vacuum pump set, a high-purity nitrogen source, a sulfur hexafluoride gas source, a dew-point instrument and a renewable drying device. A renewable drying device and an experimental tank body are deeply integrated, and gas in the tank is driven by a circulating fan to form a closed circulating flow path, so that the gas forcibly flows through an adsorption tank filled with an adsorbent for continuous moisture adsorption; when regeneration is needed, after the adsorption tank is isolated through the drying valve group, an adsorbent is heated and desorbed by utilizing a heater arranged on the adsorption tank, and meanwhile, the vacuum pump group is started and water vapor is rapidly pumped away through the vacuum interface valve group, so that a complete closed loop from adsorption to regeneration is realized, and the dryness in the tank can be continuously maintained through physical circulation; and the tedious operation of replacing the drying agent by opening the tank in the traditional scheme is fundamentally avoided.

The application discloses a kind of metal organic framework nanochannel composite membranes and preparation method and application thereof, the composite membrane includes substrate anodic aluminum oxide and MOF film grown in situ on substrate, ligand of the MOF film is bicyclic carboxylic acid ligand.The application uses bicyclic carboxylic acid ligand with different bridging angles as linker, by regulating the bridging angle of linker, the pore size is simultaneously adjusted and the pore geometry profile is reshaped, the shape matching and geometric complement of SF6 molecule are realized, the efficient separation of SF6 / N2 gas is realized, with excellent performance and stability, high separation selectivity, and the advantages of widely applicable environment.

This invention relates to a method for purifying sulfur hexafluoride (SF6) using an inorganic molecular sieve membrane. The method involves first pretreating a SF6-containing mixed gas feedstock into a purification unit and a pretreatment unit, followed by membrane separation. After single-stage or multi-stage membrane separation, a high-purity SF6 product is obtained. The permeate side of the membrane separation yields a product rich in N2, while the residual side yields a product rich in SF6, which can be reused as an insulating gas. The SF6 purification process using membrane separation exhibits excellent stability, is simple to operate, consumes little energy, and is suitable for practical applications in the electrical industry.

The utility model relates to the technical field of chemical synthesis devices, in particular to a continuous production device for fluorination reaction. Comprising a catalyst conveying assembly, a hydrogen fluoride conveying assembly, a sulfonyl fluoride synthesis assembly and a sulfonyl chloride conveying assembly, the sulfonyl fluoride synthesis assembly comprises a reactor, a circulating pump, a static mixer, a post-treatment system and a filtering assembly, and the reactor is provided with a first inlet, a second inlet, a first outlet and a second outlet; the hydrogen fluoride conveying assembly communicates with the first inlet through a pipeline, the catalyst conveying assembly communicates with the second inlet through a pipeline, the first outlet communicates with the circulating pump through a pipeline, the end, away from the reactor, of the circulating pump communicates with the static mixer through a pipeline, and the end, away from the circulating pump, of the static mixer is connected to the first inlet through a pipeline. The second outlet is communicated with the post-treatment system through a pipeline, and the sulfonyl chloride conveying assembly is communicated with the static mixer through a pipeline; according to the utility model, the production efficiency is improved, and the energy consumption is reduced.

The utility model belongs to the technical field of sulfuryl fluoride preparation equipment, and particularly relates to a reactor for preparing sulfuryl fluoride, which comprises a bottom frame, an outer barrel fixedly connected to the top of the bottom frame, a reaction barrel fixedly connected to the inside of the outer barrel, a bearing fixedly connected to the inner side of the reaction barrel, and a rotating frame fixedly connected to the inner side of the bearing. The rotating shaft drives the inner ring to rotate so as to drive the connecting rods to enable the outer ring to drive the spiral columns to rotate, the spiral columns are rotated by starting the motor, and the upper and lower adjacent spiral columns are arranged in a staggered manner, so that potassium fluoride particles attached to the outer sides of the spiral columns can be in full contact with sulfur dioxide and fluorine gas, and the reaction is more thorough; therefore, the preparation efficiency is improved.

This invention belongs to the field of lithium battery electrolyte technology, specifically relating to a method for directly synthesizing thionyl chloride from LiFSI byproducts. The method involves mixing sulfur, a passivating agent, a catalyst, and a dehydrating agent, pretreating the mixture at high temperature, and then introducing a byproduct gas containing sulfur dioxide and hydrogen chloride, along with oxygen. A one-step synthesis reaction occurs at high temperature. After the reaction, the solid is filtered off to obtain thionyl chloride. This invention directly utilizes the LiFSI byproduct mixed gas without further treatment, converting it into the core raw material SOCl2, which can then be recycled for LiFSI production, achieving high-value utilization of the byproducts. The reaction in this invention is a one-step synthesis in a single reactor, eliminating the need for a high-temperature oxidation reactor and Cl2 storage and transportation system. This significantly simplifies the process, makes operation convenient, and reduces costs considerably. The reaction temperature does not exceed 130°C, making it easy to control and resulting in low energy consumption.

The utility model provides a device of secondary sulfur distribution of thionyl chloride rectification system, include: sulfur distribution tank, rectifying column, two shunt settings'supplement sulfur tank, thionyl chloride conveying unit and liquid sulfur supply unit, the crude product thionyl chloride of synthetic procedure output is connected with the inlet of sulfur distribution tank, the outlet of sulfur distribution tank is connected with the inlet of rectifying column, the top outlet of rectifying column is connected with the material inlet of two supplement sulfur tanks respectively through thionyl chloride conveying unit, the liquid sulfur supply unit's outlet is connected with the liquid sulfur inlet of two supplement sulfur tanks respectively, and the discharge port of supplement sulfur tank is used for outputting secondary sulfur distribution thionyl chloride, adopt liquid sulfur supply unit, make liquid sulfur replace traditional solid sulfur, solve the technical problem that solid sulfur is easy to block pipeline and rectifying column, set up the supplement sulfur tank system of shunt, realize the continuous discharge of supplement sulfur tank through intermittent operation, carry out the depth conversion of the unreacted sulfur dichloride in the preposition procedure, improve the purity of subsequent rectification thionyl chloride product.

The invention relates to an external sulfur hexafluoride gas drying device and method, and relates to the technical field of power equipment operation and maintenance. The device and sulfur hexafluoride electrical equipment are independently arranged, and the device comprises a drying part, a drying part, a gas-liquid separation part, a gas-liquid separation part, a gas-liquid separation part and a gas-liquid separation part, wherein a drying agent is arranged in a cavity of the drying part; the gas storage part is used for storing the sulfur hexafluoride gas flowing through the drying tank; the gas driving part is used for driving the sulfur hexafluoride gas to flow out from a gas supply interface of the sulfur hexafluoride electrical equipment, sequentially flow through the drying part and the gas storage part, and drive the sulfur hexafluoride gas to flow through the drying part from the gas storage part again and flow back to the sulfur hexafluoride electrical equipment; the control component is used for controlling start and stop of the gas driving component; and the drying part, the gas storage part, the gas driving part and the control part are communicated and connected through a communicating pipeline.

The invention provides a sulfur hexafluoride gas online drying device and method. The sulfur hexafluoride gas online drying device comprises a gas storage chamber; a drying unit, a first pipeline is arranged between the gas storage chamber and the gas inlet end of the drying unit, the first pipeline is provided with a detection unit, and the detection unit is used for detecting gas discharged from the gas storage chamber; a second pipeline is arranged between the pipe section, located between the detection unit and the drying unit, of the first pipeline and the exhaust end of the drying unit; through the arrangement of the drying unit and the backflow unit, gas drying can be achieved, through the arrangement of the retreatment unit, the problems that a traditional built-in adsorbent is prone to saturation and inconvenient to replace are effectively solved, and meanwhile the defects that in an external drying device, the adsorbent is low in utilization rate, poor in collaborative adsorption capacity to moisture and various pollutants and frequent in replacement are overcome; the adsorbent service cycle is prolonged and the operation and maintenance cost is reduced.

The utility model discloses a washing device for producing lithium bis (fluorosulfonyl) imide, which belongs to the technical field of chemical equipment and comprises a cyclone and a washing tower, the cyclone is arranged at the top of the washing tower, an inward extending pipeline is arranged at the top of the washing tower, and the top end of the inward extending pipeline extends out of the washing tower and is communicated with a lower outlet of the cyclone; a tower body of the washing tower is provided with a plurality of mutually paired stirrers and sight glasses from top to bottom, and each pair of stirrer and sight glass is positioned at the same horizontal position and is respectively arranged on two opposite sides of the washing tower; a washing liquid inlet is formed in the lower part of the washing tower body, an overflow port is formed in the upper part of the washing tower body, a material outlet is formed in the bottom of the washing tower, and a support frame is arranged on the washing tower body. According to the utility model, the continuous production operation can be realized, so that the production efficiency is greatly improved, the product quality stability is improved, the large-scale production of the product can be realized, and the production cost is obviously reduced.

The application discloses a split box type fluorine-sulfur reactor, which comprises a lower box and an upper box detachably fixed above the lower box, the internal net height of the upper box is greater than that of the lower box, a heating assembly is arranged at the bottom of the lower box, a feeding port is fixedly arranged on the upper box and communicates with the upper box, an air inlet is fixedly arranged on the upper box and communicates with the upper box, a plurality of baffle plates extending downward are fixed on the inner top surface of the upper box, one side of the baffle plate is connected with the inner wall of the upper box, the other side of the baffle plate is away from the inner wall of the upper box, and the connecting lines of all the away sides are in S shapes, an air outlet is further fixedly arranged on the upper box, and the air inlet and the air outlet are respectively located outside the two ends of the S shape. The application solves the problem of difficult internal maintenance of the reactor in the prior art. Meanwhile, a method for preparing sulfur hexafluoride is further provided.

The invention discloses a preparation method of sulfuryl fluoride and the sulfuryl fluoride. The preparation method comprises the following steps: mixing a liquid sulfur-containing oxide with a fluoride salt, and carrying out a liquid-solid reaction to obtain a fluorosulfonic acid compound; performing thermal decomposition on the fluorosulfonic acid compound to prepare sulfuryl fluoride; wherein the chemical formula of the fluorosulfonic acid compound is M (SO3F) X, M represents a metal cation or an ammonium ion, and x represents the valence of the metal cation or the ammonium ion. The preparation method is simple, and the prepared sulfuryl fluoride is high in purity and yield.

The utility model relates to the field of SF6 recovery, and discloses a bottled SF6 recovery and purification device which comprises a box body and a vacuum pump, an air inlet and a recovery port are formed in the left side of the outer wall of the box body, the vacuum pump, a gas-liquid separator and a refrigeration compressor are arranged in the box body, the air inlet is connected to the vacuum pump through a pipeline, and the recovery port is connected to the gas-liquid separator through a pipeline. The vacuum pump is connected to the gas-liquid separator through a pipeline, the gas-liquid separator is connected to the refrigeration compressor through a pipeline, the refrigeration compressor is connected to the recovery port, and a monitoring instrument is installed on the upper left portion in the box body and used for monitoring pipeline pressure. According to the bottled SF6 recycling and purifying device, the monitoring instrument is arranged, so that SF6 is stably and safely recycled in the whole process, high-concentration gas can be liquefied and recycled under the conventional low-temperature condition, closed and efficient recycling in the whole process is achieved, the resource utilization rate is increased, and the problems that SF6 is high in value, not easy to collect and prone to pollution are solved.

The invention belongs to the field of synthesis of molybdenum dioxide dichloride, and particularly relates to a synthesis method of molybdenum dioxide dichloride. Comprising the following steps: S1, pretreating a molybdenite raw material; s2, the pretreated molybdenite raw material is placed in a reactor, chlorine trifluoride, oxygen, fluorine mixed gas and inert gas are introduced into the reactor and react with the pretreated molybdenite raw material at the reaction temperature of 20-50 DEG C, and a crude product of dichloromolybdenum dioxide and a crude product of sulfur tetrafluoride are generated; and collecting a dichloromolybdenum dioxide crude product from the bottom of the reactor. The raw ore molybdenite is used as the molybdenum raw material, the cost of the synthesis process is reduced, the process route is simple, and the reaction conditions are milder; in addition, the byproduct sulfur tetrafluoride in the invention is a product with high added value.

The present invention relates to an isovalently substituted argyrodite-type solid electrolyte. These solid electrolytes exhibit increased ionic conductivity.

The invention discloses a preparation method of a hollow fiber membrane separator and a method for separating sulfur hexafluoride and nitrogen, and belongs to the field of sulfur hexafluoride purification, and the preparation method comprises the following steps: (1) preparing a hollow fiber membrane precursor through a non-solvent phase inversion method, including the steps of preparing a membrane casting solution, spinning, curing and forming, and the like; drying the precursor, and sintering at high temperature to obtain hollow fiber membrane filaments; (2) packaging a plurality of groups of hollow fiber membrane filament assemblies, and additionally installing end sockets on the feeding side and the discharging side of tube passes at the two ends, so as to prepare a hollow fiber membrane separator; (3) mixed gas of SF6 and N2 is introduced from an inlet of a tube pass of the hollow fiber membrane separator, the SF6 gas flows along the tube pass, the N2 is discharged to a shell pass through a pore channel in a hollow fiber membrane of the tube pass, SF6-rich retentate gas is discharged from the high-pressure side of the tube pass, N2-rich permeate gas is discharged from the low-pressure side of the shell pass, the SF6-rich retentate gas is separated again through a second-stage hollow fiber membrane separator, and the SF6-rich permeate gas is discharged from the second-stage hollow fiber membrane separator. And finally, the sulfur hexafluoride content is more than 99.9%, and the nitrogen content is less than 0.1%.

A kind of SF6 gas recovery accounting method, the method is realized by SF6 gas recovery accounting device, gas density numerical value in equipment is calculated using temperature sensor, pressure sensor, combined with the quantitative volume bottle built-in in device, the volume of recovery gas chamber is quickly quantitatively obtained, and the gas recovery rate is calculated by the reduction rate of gas in quantitative volume bottle, and the total amount of gas, recovery rate is obtained by equipment volume and gas density, the amount of gas that has been recovered.Citing dynamic pressure compensation technology is changed from dynamic to static for the measurement of gas in gas chamber, and the real-time recovery rate and display pressure are corrected.

The present invention provides a method for efficiently preparing, in an environmentally friendly manner, high-purity lithium fluorosulfonate from raw materials that are easy to handle without concern for exposure to harmful substances.

This invention provides a purification device and method for medical-grade sulfur hexafluoride. The purification device includes a shell and, within the shell, a MOF adsorption layer, an alumina adsorption layer, and a particle filter layer arranged sequentially from top to bottom; the height ratio of the MOF adsorption layer to the alumina adsorption layer is 1:(2.5-3.5). The purification method includes: passing sulfur hexafluoride raw material into the purification device, subjecting it to primary adsorption in the MOF adsorption layer, secondary adsorption in the alumina layer, and filtration in the particle filter layer, to obtain medical-grade sulfur hexafluoride. Using the purification device and method of this invention, impurity gases in industrial-grade sulfur hexafluoride can be effectively adsorbed to obtain high-purity medical-grade sulfur hexafluoride gas.

The utility model belongs to fluorine tail gas processing system technical field, concretely relates to fluorine nitrogen gas anode defluorination and fluorine recovery and utilization device. Fluorine nitrogen gas anode defluorination and fluorine recovery and utilization device: including sulphur reactor, defluorination tower, water scrubbing tower, lye washing tower, membrane separation tower, the bottom of sulphur reactor is connected with fluorine-containing tail gas collection pipe, the export of the reaction gas of sulphur reactor is connected with the bottom air inlet of precooling demister, the top air outlet of precooling demister is connected with the bottom air inlet of defluorination tower, the top air outlet of defluorination tower is connected with the bottom air inlet of water scrubbing tower, the top air outlet of water scrubbing tower is connected with the bottom air inlet of lye washing tower, the top air outlet of lye washing tower is connected with the air inlet of deep dryer, the air outlet of deep dryer is connected with membrane separation tower, and the enrichment gas export of membrane separation tower is connected with fan. The fluorine nitrogen gas anode defluorination and fluorine recovery and utilization device provided by the utility model recycle the fluorine gas produced, reduce waste.

The invention relates to an isovalently substituted argyrodite type solid electrolyte. These solid electrolytes exhibit increased ionic conductivity.