99results about "Sulfur and halogen compounds" patented technology

The invention discloses preparation equipment and a preparation process for preparing high-purity electronic-grade thionyl fluoride, and the preparation equipment comprises a mixer, the mixer is communicated with a first preheating device, the first preheating device is communicated with a first rectifying tower, the top of the rectifying tower is connected with a condenser, the condenser is communicated with a crude product tank, the crude product tank is communicated with a second preheating device, and the second preheating device is communicated with a second rectifying tower. The second preheating device is communicated with a second rectifying tower, the second rectifying tower is communicated with a third rectifying tower, the third rectifying tower is connected to a storage tank, the storage tank is connected with a vaporization device, the vaporization device is pressurized and then stored in a high-pressure buffer tank, the high-pressure buffer tank is connected with at least three adsorption towers, and the adsorption tower at the rearmost end is connected with a high-pressure product tank. According to the invention, the purity of the finished product is improved, and all raw material components are fully utilized.

The invention discloses a sulfur hexafluoride gas purifying and filtering device, belongs to the technical field of sulfur hexafluoride gas filtering, and aims to solve the problems that the impact force of gas input into a tank body is relatively strong, the filtering efficiency and the filtering effect are relatively poor, and water in gas needs to be transferred to other equipment for treatment when being separated. A filtering mechanism for conveniently filtering gas is arranged in the gas filtering tank, and a water removal mechanism for conveniently separating water contained in the gas is arranged in the gas filtering tank. According to the sulfur hexafluoride gas purifying and filtering device, the air bellow is connected to the inner end of the air inlet pipe arranged above the filtering mechanism, the hedging air pipes are arranged on the two sides of the air bellow, and the air outlet ends of the hedging air pipes are oppositely arranged; therefore, speed reduction of the high-speed gas is achieved through hedging.

The invention relates to an SSZ-13 molecular sieve membrane, a preparation method and an application of the SSZ-13 molecular sieve membrane in SF6 separation, and a high-quality SSZ-13 zeolite membrane is synthesized on a hollow fiber substrate and is used for N2 / SF6 separation. The ball-milled seed crystal more reliably synthesizes a thinner film. The thickness of the film layer induced and synthesized by the original seed crystal is 14 microns, and the thickness of the film layer induced and synthesized by the ball-milling seed crystal is 5.2 microns. The average N2 / SF6 selectivity is 325, and the N2 transmittance is 5.4 * 10 <-8 > mol.m <-2 >. S <-1 >. Pa <-1 > (-160 GPU).

The invention relates to the technical field of fine separation in fluorine chemical industry, in particular to a method and a system for purifying thionyl fluoride by combining multi-stage rectification and adsorption. The method comprises the following steps: carrying out heat exchange on raw material gas, feeding the raw material gas into a first-stage rectifying tower, carrying out primary separation, removing low-boiling impurities, feeding the raw material gas into a second-stage rectifying tower, carrying out further purification, condensing the rectified high-purity gas into a liquid crude product, and carrying out deep impurity removal through a mixed adsorbent fixed bed to finally obtain a thionyl fluoride product with the purity higher than 99.999%. The system comprises a raw material gas feeding unit, a two-stage rectifying tower, a condenser, an adsorption device and a product storage tank, modules are sequentially connected, and the system is provided with a temperature and pressure control and anti-corrosion structure and is suitable for industrial purification production of continuous high-purity thionyl fluoride.

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 preheating device for preparing electronic-grade thionyl fluoride, comprising: a preheating tank body, a crude gas inlet, a crude gas outlet, a serpentine coil, an inflow pipe, an outflow pipe, and an internal circulation contact type structure, wherein the serpentine coil comprises an upper through-hole connected to the crude gas inlet, the upper through-hole connected to a transverse transmission part, the end of the transverse transmission part is connected to a bending part, the transverse transmission parts and the bending parts are alternately arranged, and the transverse transmission part at the lowest end is connected to a lower through-hole communicated with the crude gas outlet, the internal circulation contact type structure comprises an inner contact piece arranged on the side of the bending part, a hollow piece is arranged on the outer side of the inner contact piece, and an outer contact piece is connected to the side of the inner contact piece close to the transverse transmission part; and a lower isolation structure comprises an inner heat cover arranged at the lower end of the lower through-hole, an outer isolation cover is arranged on the outer side of the inner heat cover, and a circulation rack is arranged on the outer side of the outer isolation cover. The present invention can completely complete preheating in a preheater with a shorter path.

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 device and method for purifying sulfur hexafluoride gas from sulfur hexafluoride mixed gas include a mixed gas exhaust pipeline, a buffer tank, a pressure regulating valve, a mass flow controller, a first adsorption column, a second adsorption column, a storage tank and a nitrogen exhaust pipeline; the present invention can achieve the purpose of continuous purification of SF6 gas through the alternating operation and regeneration of the first adsorption column and the second adsorption column. The function of the first sulfur hexafluoride sensor and the second sulfur hexafluoride sensor is to find the appropriate adsorption and regeneration time, so that the first adsorption column and the second adsorption column can achieve the SF6 content in the discharged N2 lower than the emission requirements specified in the relevant standards, and the concentration of the desorbed SF6 gas in the regenerated adsorption column is above 90%; the present invention has a novel design, a simple structure, and is easy to operate. It can purify the SF6 in the SF6 / N2 mixed gas in the GIS equipment to more than 90%, so that SF6 can be recycled and reused, saving the use of SF6 and reducing the operating cost.

The invention belongs to the field of chemical technology production, and particularly relates to a process and a device for combined synthesis of sulfur dichloride and chloroacetic acid. The process for jointly synthesizing sulfur dichloride and chloroacetic acid comprises the following steps: adding concentrated sulfuric acid into a sulfur dichloride reactor, introducing chlorine gas and liquid sulfur, carrying out a heating reaction, condensing to obtain sulfur dichloride, introducing an uncondensed gas phase into a chloroacetic acid reactor, adding sulfur dichloride and acetic acid into the chloroacetic acid reactor, carrying out a reaction, and after the reaction is completed, carrying out reduced pressure distillation to obtain the sulfur dichloride and chloroacetic acid. Reaction liquid enters a chloroacetic acid crystallizer, finished chloroacetic acid is obtained through primary crystallization, uncrystallized mother liquor is cooled through a mother liquor tank and subjected to secondary crystallization, and dichloroacetic acid is obtained. According to the process for jointly synthesizing the sulfur dichloride and the chloroacetic acid, the sulfur dichloride and the chloroacetic acid are jointly produced, the reaction conversion rate is high, the utilization rate of chlorine is increased, the purity of the sulfur dichloride reaches 95% or above, and the purity of the chloroacetic acid reaches 99.90% or above; the invention also provides a device for combined synthesis of sulfur dichloride and chloroacetic acid.

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 relates to the technical field of electrical equipment humidity detection, in particular to an electrical equipment dehumidification device and method with an air chamber humidity detection.The electrical equipment dehumidification device comprises an air chamber, a recycling and purifying unit, an air storage tank, online detection equipment, a vaporizer, a vacuum pump and a filling unit, and the recycling and purifying unit comprises a filter, a recycling compressor and a vacuum compressor; the filling unit comprises a nitrogen steel cylinder and a sulfur hexafluoride filling steel cylinder, the device further comprises a PLC (Programmable Logic Controller), and all the devices are connected with the PLC; and after the sulfur hexafluoride in the gas chamber is automatically recovered through the PLC, the gas chamber is subjected to vacuumizing, nitrogen filling replacement and emptying operation, and then the gas chamber is filled with the sulfur hexafluoride. According to the invention, the gas in the gas chamber of the high-voltage electrical equipment is cyclically treated by adopting a unique purification treatment mode, impurities such as micro water, decomposition product gas and dust particles in the gas can be treated at the same time, and the recycled gas can be recycled after being purified without replacing new gas.

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.

A method for decomposing SF6 comprising the steps (a) providing a solution of an alkali metal hydroxide in an alcohol of formula R-HCOH-R', wherein R and R' independently are selected from H, C1 to C6 - alkyl; cyclohexyl, cyclopentyl, methyl cyclopentyl, or C1 to C6 - alkoxy, (b) contacting the solution with SF6 (c) exposing the solution with SF6 in a closed vessel to electromagnetic radiation at a wavelength of between 240 nm to 300 nm, until SF6 is decomposed.

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.

Provided is a method for manufacturing halogenated lithium, the method being characterized by carrying out a mixing / heat treating step for mixing lithium sulfide and a halogenated ammonium under heating conditions of 90-250°C. By using this method, byproducts can easily be removed without involving a step for directly removing moisture and without using a simple halogen, which would make handling complicated, additionally, and the energy needed for production is prevented from being excessive.

The invention discloses a mixer for preparing high-purity electronic-grade thionyl fluoride, comprising a mixing tube, an anhydrous hydrogen fluoride feeding end, a thionyl chloride feeding end, and a discharging end, and also comprising: a middle material dividing structure, the mixing tube comprising a front section branch pipe, a rear section segment, and a cross-connecting plate, the middle material dividing structure comprising a first sealing crank sleeve, the lower end of the cross-connecting plate being connected to a second sealing crank sleeve, a driving member being provided on a side of the first sealing crank sleeve away from the cross-connecting plate, a dynamic material dividing member being connected to an output end of the driving member and penetrating the cross-connecting plate and being located in the first sealing crank sleeve and the second sealing crank sleeve; an axial material dividing structure, the front section branch pipe and the rear section segment are both provided with an installation groove on one side close to the cross-connecting plate, a static material dividing member being movably provided in the installation groove, the first sealing crank sleeve and the second sealing crank sleeve being connected to the rear side of the cross-connecting plate and respectively abutting against the two static material dividing members. The invention can facilitate the regeneration of the coating and better facilitate the maintenance and use of the mixer.

The invention discloses a preparation method and application of an AKD (Alkyl Ketene Dimer) composite MOF (Metal Organic Framework) material, and relates to a preparation method and application of a modified MOF material. The invention creatively provides a method for adsorbing SF6 by combining MOFs and alkyl ketene dimer under the condition of high humidity, and a novel modified multi-layer MOF material is prepared to realize high-selectivity adsorption of SF6 in an SF6 / N2 system. According to the invention, MOFs are introduced into the field of gas adsorption, and the MOFs adsorbent with specific recognition capability is prepared by utilizing the interaction among template molecules, metal ions and organic ligands. By ensuring the dry adsorption environment of MOFs, improving the adsorption effect of MOFs and realizing efficient recovery of SF6 from N2 / SF6 mixed gas, the invention adopts a simple and low-cost method, efficiently improves the water vapor barrier property and hydrophobic property, has higher mechanical strength, and can be applied to the industrial field.

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.

A polyanionic compound has the following chemical formula: Na2+xMn1−yMySi2−zM′zO6−tNkXpYq(1), where in formula (1), M is selected from Ni, Fe, Cu, Zn, Mg, Al, or a combination thereof, M′ is selected from Ge, Sn, Ti, or a combination thereof, X is selected from S, Se, or a combination thereof, and Y is selected from F, Cl, or a combination thereof, where −0.2<x<0.2, 0≤y<0.1, 0≤z<0.1, 0≤t≤0.5, 0≤2t / 3, 0≤p≤t, 0≤q≤t / 2, and k+½p+ 3 / 2q=t.

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 invention discloses a mixer for preparing high-purity electronic grade thionyl fluoride, which comprises a mixing pipe, an anhydrous hydrogen fluoride feed end, a thionyl chloride feed end and a discharge end, and also comprises a middle material distribution structure, the mixing pipe comprises a front branch pipe, a rear branch pipe and a transverse connecting plate, and the middle material distribution structure comprises a first sealing crank sleeve, a second sealing crank sleeve and a third sealing crank sleeve; the lower end of the transverse connecting plate is connected with a second sealing crank sleeve, a driving piece is arranged on the side, away from the transverse connecting plate, of the first sealing crank sleeve, and the output end of the driving piece is connected with a movable material distributing piece which penetrates through the transverse connecting plate and is located in the first sealing crank sleeve and the second sealing crank sleeve; mounting grooves are formed in the sides, close to the transverse connecting plate, of the axial material distribution structure, the front-section branch pipe and the rear-section subsection, a static material distribution piece is movably arranged in each mounting groove, and a first sealing crank sleeve and a second sealing crank sleeve are connected to the two sides of the rear portion of the transverse connecting plate and abut against the two static material distribution pieces correspondingly. And the mixer is better convenient to maintain and use.

The utility model relates to the technical field of sulfuryl fluoride production and processing, and particularly discloses a sulfuryl fluoride production device and a battery production line, the sulfuryl fluoride production device comprises two reaction devices; each reaction device comprises a furnace body and is further provided with a feeding channel, a discharging channel and an exhaust flow channel which are independent from one another, and the exhaust flow channel extends from the air inlet end to the air outlet end from bottom to top; one of the two reaction devices is a first reaction device, and the other reaction device is a second reaction device; a feeding channel of the first reaction device is used for introducing metal fluoride and oxysulfide into a furnace body of the first reaction device, and a discharging channel of the first reaction device is used for discharging reaction products; the feeding channel of the second reaction device is communicated with the discharging channel of the first reaction device, the furnace body of the second reaction device is used for calcining reaction products to obtain sulfuryl fluoride, and the exhaust runner is used for discharging sulfuryl fluoride. Compared with the prior art, the method has the advantages that dust wrapped by produced sulfuryl fluoride can be reduced, and the concentration of the sulfuryl fluoride can be increased.

Disclosed is an electrolyte and a secondary battery containing the same. According to the present disclosure, charging efficiency and output may be improved due to low discharge resistance, and gas generation and thickness increase may be suppressed to provide a secondary battery with long-term lifespan and excellent high temperature capacity retention.