116 results about "Liquid chlorine" patented technology

The present application relates to the field of crane pipe leak testing, and specifically discloses a crane pipe leak testing system for liquid chlorine unloading. The crane pipe includes a fixed pipe and a movable pipe, and a heat insulation structure is arranged on the fixed pipe and the movable pipe; the heat insulation structure is used to insulate the inside of the fixed pipe and the movable pipe; a temperature detection component for obtaining the temperature of the heat insulation structure is arranged at the heat insulation structure; a socket matching the filling port of the tank truck is formed on the fixed pipe; the movable pipe is inserted into the socket so that the fixed pipe and the movable pipe form a closed loop; a gas thermal imaging component is arranged on the fixed pipe, and the gas thermal imaging component forms a gas detection area, and the gas detection area covers the movable pipe. The present application has the effect of ensuring that the liquid chlorine will not be vaporized when unloading the truck, and better protecting the crane pipe, while using the temperature detection component and the gas thermal imaging component to detect the temperature outside the heat insulation structure, and when the crane pipe leaks, it will cause the temperature outside the heat insulation structure to change significantly, thereby using liquid chlorine to directly perform leak testing.

The invention relates to the technical field of liquid chlorine gasification, and provides a liquid chlorine gasification system which comprises a first containing box, the first containing box is provided with a plurality of containing spaces, the containing spaces do not communicate with one another, and the containing spaces are used for containing first heat exchange media; the first pipeline is provided with a first inlet and a first outlet, the first inlet is communicated with the liquid chlorine storage tank, the first outlet is used for discharging chlorine, and the first pipeline sequentially penetrates through the containing spaces; the second pipeline is provided with a second inlet and a second outlet, the second pipeline sequentially penetrates through the multiple containing spaces, and the second pipeline is used for circulating a second heat exchange medium; the second inlet and the first outlet are located on the same side of the first containing box, and the second outlet and the first inlet are located on the same side of the first containing box. By means of the technical scheme, the technical problem that in the prior art, liquid chlorine in a coil pipe is rapidly gasified, and consequently pressure rises sharply is solved.

The invention relates to the technical field of robot control and safety inspection, and discloses a robot control method and system for liquid chlorine warehouse inspection and a storage medium. The method comprises the following steps: acquiring gas concentration distribution and obstacle position data in a liquid chlorine warehouse through a sensor, and generating a dynamic environment feature set; constructing a real-time three-dimensional environment map according to the dynamic environment feature set, extracting leakage region boundary information from the real-time three-dimensional environment map, and determining a high-risk region set; generating an initial path candidate set for the high-risk region set, and determining a low-risk inspection route according to the initial path candidate set; guiding a robot to navigate to a container position according to the low-risk inspection route, and acquiring container surface image data; and extracting identification information and batch codes from the container surface image data, and generating an inspection verification result. According to the invention, accurate, real-time and safe inspection and monitoring can be realized through the robot in a dynamic, complex and high-risk liquid chlorine warehouse environment.

The invention provides a preparation method of chlorinated paraffin 70 with a high softening point, and belongs to the technical field of chlorinated paraffins.The preparation method comprises the steps that S1, mixed wax is provided, and raw materials of the mixed wax are Fischer-Tropsch wax and petrochemical wax; s2, feeding the mixed wax into a reactor, then turning on an ultraviolet lamp in the reactor for irradiation, after liquid chlorine is gasified to form chlorine, feeding chlorine into the reactor, heating and carrying out segmented control reaction; s3, after the reaction is finished, blowing air into the reactor, then washing a reaction product with water, and then adding a compound stabilizer into a crude product obtained by washing with water, so as to obtain chlorinated paraffin 70; the chlorine content of the chlorinated paraffin 70 is not less than 69.5%, the softening point is not less than 98 DEG C, and the acid value is not more than 0.1 mgKOH / g. According to the method, hot chlorination and photo-initiation are combined, so that the chlorine content and the softening point of the product are controllable, the production efficiency is high, the reaction speed is high, the reaction temperature is reduced, the production period is shortened, and the product quality is stable.

The utility model belongs to the field of chemical raw material recovery, and discloses a system for separating salt and extracting bromine from purified terephthalic acid membrane concentrated water. The system comprises a thermal decomposition device, a nanofiltration device, a static mixer and a bromine extraction rectification device. The utility model solves the technical problems that the acid consumption is large before bromine is extracted from purified terephthalic acid wastewater, and poisoning is easily caused by leakage hidden danger in the transportation and storage process of liquid chlorine.

The utility model discloses a kind of liquid chlorine filling anti-leakage intelligent connecting devices, including liquid chlorine storage tank, the top of the liquid chlorine storage tank is equipped with connecting pipe, fixed ring is sleeved on the connecting pipe, the connecting pipe is equipped with cover plate, locking mechanism is installed on the side of the cover plate, filling mechanism is installed on the cover plate, first locking sleeve is sleeved on the filling mechanism, second locking sleeve is installed in the first locking sleeve, the second locking sleeve is fixed with feed pipe. The utility model is through the buckle type design of locking mechanism and fixed ring, realize the even locking and quick disassembly of cover plate and connecting pipe, effectively avoid the uneven stress and wear problem of traditional sealing structure;Filling mechanism is matched with double locking sleeve and shut-off valve, forms multilayer sealing system, in combination with the sealing seat and sealing ring of rubber material, significantly improve the anti-leakage performance under high pressure.

The invention discloses an intelligent alkali liquor adding system based on real-time monitoring and feedback control of a mercuric chloride production section, which comprises a liquid chlorine supply system and raw material pretreatment systems in sequential pumping connection, and the system can dynamically and accurately match fluctuating chlorine load in tail gas; and the problem that the addition amount of the alkali liquor is not matched with the chlorine concentration is effectively solved. The chlorine gas absorption efficiency is remarkably improved, up-to-standard discharge is ensured, the consumption of the alkali liquor is greatly reduced, the operation cost and the wastewater treatment burden are reduced, and the double improvement of economic benefits and environmental benefits is realized.

The present invention discloses a liquid chlorine gasification safety maintenance and treatment system and a treatment method, which include a storage bin, an absorption pump, a chlorine gas absorption tower, and a hydrochloric acid absorption tower. The absorption pump transports the leaked chlorine gas to the chlorine gas absorption tower, and the chlorine gas absorption tower is connected to the hydrochloric acid absorption tower. The hydrochloric acid absorption tower includes a gas-liquid distribution chamber, an absorption and cooling chamber, graphite absorption strips, and two switching plates. The gas-liquid distribution chamber and the absorption and cooling chamber are separated by one switching plate. A plurality of graphite absorption strips are arranged between the two switching plates. The graphite absorption strips have a large-diameter curved surface, a small-diameter curved surface, a large-diameter docking surface, and a small-diameter docking surface. The large-diameter curved surfaces and the small-diameter curved surfaces of each graphite absorption strip can respectively form cylindrical barrels with different diameters. The switching plate includes a general lining plate, a switching baffle, and a belt moving component. The general lining plate is provided with a plurality of through holes in an array, the switching baffle is provided with a plurality of docking ports, and four through grooves are arranged on the periphery of the through holes. The belt moving component is installed in the through grooves.

The utility model relates to the technical field of liquid chlorine conveying, and discloses a liquid chlorine conveying device for producing chlorinated polyethylene, which comprises a liquid chlorine conveying pipe and a support plate, a fixing sleeve is fixedly mounted on the outer surface of the liquid chlorine conveying pipe, and a connecting sleeve is movably mounted in the fixing sleeve. Compared with a traditional device, the liquid chlorine conveying pipe and the connecting pipe can be in butt joint conveniently through the wedge block, the second spring, the third spring and the fixing groove, so that the tedious installation process is simplified, the installation time and the labor cost are remarkably reduced, and the device can be put into use rapidly; the liquid chlorine conveying device is simple in structure and convenient to use, tight connection between the connecting pipe and the liquid chlorine conveying pipe is guaranteed, the sealing performance of equipment is enhanced, the leakage risk is effectively avoided, safe conveying of liquid chlorine is guaranteed, in addition, the design facilitating butt joint greatly facilitates follow-up maintenance and overhaul work, and the maintenance difficulty and cost are reduced.

The utility model relates to the technical field of liquid chlorine treatment, in particular to a liquid chlorine steel cylinder treatment device and a using method. The device comprises a liquid chlorine steel cylinder, a gravity sensing base for sensing the weight of the liquid chlorine steel cylinder, and an evacuating and replacing unit which is communicated with the liquid chlorine steel cylinder and is used for removing residual chlorine in the liquid chlorine steel cylinder, the neutralizing unit is communicated with the liquid chlorine steel cylinder and is used for neutralizing residual chlorine; the purging and drying unit and the air tightness checking unit are sequentially arranged at the downstream of the evacuating and replacing unit; the liquid chlorine steel cylinder is provided with a gas-phase cylinder valve and a gas-phase distribution pipe which are communicated with the evacuation and replacement unit, and a liquid-phase cylinder valve and a liquid-phase distribution pipe which are communicated with the neutralization unit. The liquid chlorine steel cylinder treatment device has the effect of solving the problems that existing liquid chlorine steel cylinder treatment is tedious in operation and low in efficiency, and potential safety hazards exist.

The invention belongs to the technical field of gas leakage safety protection, and particularly relates to a water curtain spraying system based on the chlorine leakage condition of a liquid chlorine storage area, which deduces the predicted diffusion principal axis direction of a chlorine cloud cluster and the predicted concentration distribution situation along the axis by analyzing leakage points and three-dimensional wind field information, establishes a plurality of virtual interception planes perpendicular to the principal axis, and provides a water curtain spraying system based on the chlorine leakage condition of the liquid chlorine storage area. According to the predicted diffusion concentration distribution situation, determining a target contour area needing to be covered by the water curtain on each virtual interception plane, projecting a preset spraying range of each nozzle of the fixed water curtain belt to the virtual interception plane to form a fixed coverage area, and activating a nozzle group of which the coincidence degree with the corresponding target contour area meets a condition as a main interception unit, for the gap area which is not fixedly covered, coordinates and spraying angles are planned and deployed for the movable water curtain, water curtain spraying operation is executed, the protection effect of the water curtain is evaluated and fed back, and dynamic, efficient and accurate interception and decontamination of chlorine cloud cluster diffusion can be achieved.

The invention relates to the technical field of organic synthesis, in particular to the field of IPC C07D239, and more particularly relates to a synthesis method of a phenyl isoxazoline compound. Comprising the following steps: step 1, using a benzaldehyde compound as an initial raw material, and reacting with hydroxylamine hydrochloride to generate a benzaldoxime compound; 2, carrying out a chlorination reaction on the benzaldoxime compound generated in the step 1 and liquid chlorine through a microchannel reactor to generate a chlorinated benzaldoxime compound; and 3, carrying out ring closing on the chlorobenzaldoxime compound generated in the step 2 and an alkene compound to obtain the phenyl isoxazoline compound. A metal catalyst is not used in the preparation method, so that the solid waste treatment cost is reduced; in the step 2, a continuous flow reaction technology of a microchannel reactor is adopted, the reaction time is shortened, compared with a kettle type intermittent process, the productivity is greatly improved, and the reaction safety is higher.

This invention provides a liquid chlorine storage material for separating and storing chlorine from chlorine-containing gases. The material is a mixed ionic liquid composed of at least one organic salt and one additive, wherein the organic salt is selected from one or more quaternary ammonium salts, and the additive is a metal chloride. The chlorine storage material is liquid at 25°C and a pressure of 1000±100 hPa. This invention provides a storage medium with a high chlorine storage rate, high chlorine storage density, simple release conditions, and high chlorine purity. This storage medium effectively reduces the saturated vapor pressure of chlorine at room temperature, improving the safety of chlorine transportation and use.

This invention discloses a process for preparing chlorides by reducing chlorination with rare metal oxides, comprising the following steps: S1, in an inert atmosphere, a mixture containing rare metal oxide powder, a reducing agent, and a chloride salt is subjected to a reduction reaction at a predetermined temperature 1; S2, the temperature is lowered to a predetermined temperature 2, oxygen is introduced, and the concentration of oxygen in the mixed gas is adjusted to carry out a chlorination reaction, and the chlorinated product is condensed and collected. This invention eliminates the need for gaseous chlorinating agents such as chlorine or hydrogen chloride, avoiding the leakage risks of liquid chlorine and compressed hydrogen chloride during storage and transportation; the raw materials can be directly rare metal oxides, with a wide range of sources, good process adaptability, and significantly reduced production costs.

The utility model discloses a vaporization device for liquid chlorine raw materials, which relates to the technical field of vaporization of liquid chlorine raw materials and comprises a vaporization cylinder, a water inlet pipe is fixed at the bottom of the outer side wall of the vaporization cylinder, a drain pipe is fixed at the top of the outer side wall of the vaporization cylinder, and a liquid chlorine inlet pipe is fixed at the bottom of the outer side wall of the vaporization cylinder in a penetrating manner. A chlorine discharge pipe is fixed to the top of the outer side wall of the vaporization cylinder in a penetrating mode, a spiral pipe is fixed between the end of the liquid chlorine inlet pipe and the end of the chlorine discharge pipe, a turbulent flow mechanism is fixed to the top of the vaporization cylinder, and a flow division buffering mechanism is fixed to the outlet end of the chlorine discharge pipe; according to the vaporization device for the liquid chlorine raw material, water in the vaporization cylinder is disturbed through the arrangement of the turbulent flow mechanism, so that all parts of an internal water body are mixed, the temperature of all parts of the internal water body is guaranteed to be uniform during vaporization heat absorption, and the situation that the vaporization effect is affected due to uneven heating is avoided.

The utility model relates to the technical field of chlor-alkali plants, in particular to a high-energy-efficiency chlor-alkali plant freezing device which comprises a freezing box, a circulating mechanism is arranged in the freezing box, a stirring mechanism is arranged in the freezing box, the circulating mechanism comprises a box body, and the box body is fixedly installed at the top end of the freezing box. A first pump body is fixedly installed at the top end of the freezing box, a water inlet pipe of the first pump body communicates with the box body, a first guide pipe and a second guide pipe are rotationally connected to the side face of the freezing box, and one end of the first guide pipe and one end of the second guide pipe both penetrate through the inner wall of the freezing box. According to the chlorine gas cooling device, the circulating mechanism is arranged, so that the aim of driving refrigerating fluid to circularly flow in the freezing box is achieved, the aim of cooling and circularly flowing liquid chlorine gas is facilitated, and the aim of cooling the liquid chlorine gas is facilitated; the purpose of improving the liquidity of the liquid chlorine is achieved, and the freezing effect of the liquid chlorine is improved.

The utility model relates to a liquid chlorine vaporization refrigeration energy-saving and consumption-reducing system which comprises a chlorine vaporizer, the bottom of the chlorine vaporizer is communicated with a chilled water return pipeline or a circulating water feeding pipeline, and the top of the chlorine vaporizer is communicated with the chilled water feeding pipeline or the circulating water return pipeline; the lower part of the chlorine vaporizer is communicated with a chlorine liquid conveying pipeline, and the upper part of the chlorine vaporizer is communicated with a chlorine gas conveying pipeline. The chlorine vaporizer is adopted, the lower portion of the chlorine vaporizer is communicated with the chilled water return pipeline or the circulating water feeding pipeline, and the upper portion of the chlorine vaporizer is communicated with the chilled water feeding pipeline or the circulating water return pipeline. Low-temperature chilled water or circulating water is used for replacing steam to vaporize liquid chlorine, so that the steam is not used; and the device can be used as a low-temperature chilled water cold source, so that the purposes of energy conservation and consumption reduction are achieved.

The invention discloses a method for leaching nickel concentrate by using wet chlorine, and belongs to the field of hydrometallurgy. The problems that the liquid chlorine use cost is high, the chlorine overflow risk exists in the vaporization heating process, and the effective utilization rate of the vaporized chlorine and the raw material reaction is low are solved. The method comprises the steps that nickel concentrate and copper removal tailings are mixed, slag flushing is conducted through new water, and slurry automatically flows into a slurrying tank and then is slurried; after slurrying, returning feed liquid into the reaction kettle for stirring, preparing liquid caustic soda as absorption liquid in the two-stage absorption tower, and opening a tail gas absorption fan and a tail gas absorption pipeline valve of the reaction kettle; introducing steam and wet chlorine into the reaction kettle to react with the feed liquid; and returning the reacted feed liquid into a filter press for solid-liquid separation to obtain a leaching solution and leaching residues. By replacing common liquid chlorine with wet chlorine generated in the industrial production process, the problems of high liquid chlorine use cost, chlorine overflow risk in the vaporization heating process, low effective utilization rate of the vaporized chlorine and raw material reaction and the like are solved.

The utility model discloses an energy-saving production device for refining and deoxidizing liquid chlorine, which belongs to the technical field of liquid chlorine refining and comprises a chlorine heating device, a chlorine and liquid chlorine hedging and impurity removing device, a chlorine liquefying device and a liquid chlorine circulating device. The chlorine heating device is used for conveying high-temperature chlorine into the chlorine liquid chlorine hedging and impurity removing device through a pipeline; the liquid chlorine circulating device is used for continuously conveying liquid chlorine into the chlorine and liquid chlorine hedging and impurity removing device through a pipeline; in the chlorine and liquid chlorine hedging and impurity removing device, liquid chlorine absorbs high-temperature chlorine to be vaporized and then completes countercurrent hedging with continuously conveyed liquid chlorine, impurities in the liquid chlorine are taken away, and the liquid chlorine subjected to impurity removal is conveyed to a user side through a pipeline. The liquid chlorine refining and deoxidizing energy-saving production device can effectively solve the problems that in the prior art, heat of high-temperature chlorine at an outlet of a chlorine compressor is not effectively utilized in the liquid chlorine refining process, and sensible heat of the high-temperature chlorine is wasted; in the refining process, steam needs to be additionally introduced as a heat source, and the steam consumption is large.

The utility model relates to the technical field of chlorine preparation, and discloses chlorine gasification equipment which comprises a feeding pipe, one end of the feeding pipe is communicated with a dispersing pipe, the outer wall of the dispersing pipe is communicated with a conveying pipe, the other end of the conveying pipe is communicated with a vaporization pool, the inner wall of the vaporization pool is provided with a spiral pipe I, and the spiral pipe I is provided with a spiral pipe II. A first spiral pipe is arranged on the inner wall of the vaporization pool, a second spiral pipe is arranged on the inner wall of the vaporization pool, the two ends of the first spiral pipe and the two ends of the second spiral pipe communicate with circulating pools, one end of the first spiral pipe and one end of the second spiral pipe are each provided with a conveying pump, a gas conveying pipe is arranged at the upper end of the vaporization pool, and the other end of the gas conveying pipe communicates with a buffer tank. According to the utility model, the liquid chlorine is conveyed into the vaporization pool, and the spiral pipe I and the spiral pipe II are arranged in opposite directions, so that the temperature in the vaporization pool is uniform and stable, the vaporization efficiency is higher, and the vaporized chlorine is conveyed into the buffer tank through the gas conveying pipe and then is conveyed out from the buffer tank for application.

The utility model relates to the technical field of chemical equipment, and particularly discloses a liquid chlorine reactor which comprises a reactor main body, a liquid chlorine feeding pipe is arranged at the top end of the reactor main body in a penetrating manner, the bottom end of the liquid chlorine feeding pipe is fixedly connected with a liquid chlorine distribution pipe, and the liquid chlorine feeding pipe is communicated with the liquid chlorine distribution pipe; a plurality of nozzle assemblies are fixedly arranged on the upper end surface of the liquid chlorine distribution pipe at intervals; the nozzle assembly comprises a nozzle shell and a nozzle which are fixedly arranged on the upper end face of the liquid chlorine distribution pipe, the nozzle is located in the nozzle shell, an expansion piece is arranged at the top end of the nozzle, a spring is fixedly connected to the middle of the upper end face of the expansion piece, and the end, away from the expansion piece, of the spring is fixedly connected with the nozzle shell. According to the utility model, through the matching arrangement of the expansion sheet and the spring, the generated chloroacetic acid can be effectively prevented from entering the liquid chlorine distribution pipe and the liquid chlorine feeding pipe, the problem that the liquid chlorine distribution pipe and the liquid chlorine feeding pipe are blocked and then broken is avoided, and the safety of the device is improved.

The invention relates to the technical field of chlor-alkali industrial gas treatment, in particular to a chlorine liquefaction-gasification energy balance system and process based on water cooling circulation. According to the system, low-temperature cold water serves as a cooling agent, and the heat efficiency of the system is improved to 75% or above through the gradient liquefaction design of first-stage normal-temperature water cooling (20-30 DEG C) and second-stage low-temperature water cooling (14-19 DEG C) in cooperation with a waste heat recovery liquid chlorine gasifier. And compared with a traditional refrigeration process, energy is saved by more than 30%, Freon refrigerants are completely abandoned, and environmental protection and economic benefits are achieved. The equipment investment and maintenance cost is low, and the regional adaptability is high.

The utility model discloses novel liquid chlorine vaporization equipment, which relates to the technical field of chemical equipment and comprises a sealed box body, a connecting pipe is arranged in the box body, the input end of the connecting pipe is connected with a liquid chlorine steel cylinder, and the output end of the connecting pipe is connected with a pressure buffer tank. A plurality of evenly-distributed bent pipes are fixedly connected to the front side face of the sealing box body, welding seams are arranged on the outer sides of the joints of the bent pipes and the sealing box body, the outer ends of the welding seams are surrounded by fixed bases, the outer side faces of the fixed bases are connected with sliding bases, and the fixed bases are connected with the sliding bases in a buckled mode. A sealing belt is arranged at the joint of the sliding base and the bent pipe, an electrochemical sensor is arranged at the top end of the fixed base, a switch and an absorption tank are arranged on the left side face of the sealing box body, and a central processing unit and an alarm are further arranged at the top end of the sealing box body. The maintenance efficiency and the use safety are improved, and the service life of equipment is prolonged.

The invention belongs to the technical field of organic chemical synthesis, and particularly provides a synthetic method of p-methyl benzyl chloride, which comprises the following steps: S1, raw material preparation: vaporizing liquid chlorine into chlorine gas; the method comprises the following steps: premixing xylene and a photocatalyst, and introducing supercritical CO2 into a mixture generated by premixing for dispersion to obtain a mixture; s2, chlorination reaction: introducing the mixture obtained in S1 into a chlorination kettle, then introducing chlorine into the chlorination kettle, and starting a plasma generator and an ultraviolet light source in the chlorination kettle at the same time; s3, by-product treatment: absorbing the HCl gas generated in the chlorination reaction in the step S2 through deionized water in a falling film absorber to generate a hydrochloric acid solution; and S4, product separation and refining: vaporizing the mixture generated in the chlorination reaction in the step S2 through a pressure reducing valve to remove supercritical CO2, filtering out the photocatalyst through a filter, and carrying out microwave distillation on the filtered mixed liquid through a distillation kettle to obtain p-methylbenzyl chloride. The method can improve the selectivity and yield of p-methylbenzyl chloride.

A device for chlorination reaction in maltol production includes a liquid chlorine cylinder, a chlorine buffer tank, a chlorination kettle, and a furfuryl alcohol tank. A straight-through control valve is provided at the mouth of the liquid chlorine cylinder, and a chlorine supply pipe is connected to the control valve. The chlorine supply pipe is connected to the chlorine buffer tank. A pressure-stabilizing valve, a pneumatic regulating valve, and a mass flow meter are connected in series to the chlorine supply pipe. A first coil is provided between the mass flow meter and the chlorine buffer tank. A second coil is provided on the outside of the chlorine buffer tank body. The chlorine buffer tank is connected to the chlorination kettle, and the furfuryl alcohol is connected to the dripping port on the upper side of the chlorination kettle through the second coil. Usage method: open the control valve to control the liquid chlorine pressure, and control the flow rate through the mass flow meter and the pneumatic regulating valve; the first coil heats and vaporizes the liquid chlorine, and the furfuryl alcohol is pre-cooled by the second coil, and a chlorination reaction is carried out in the chlorination kettle. The liquid chlorine output pressure of the present invention is stable, and the liquid chlorine metering is more accurate, which is conducive to improving the product yield. Pre-cooling is performed before the furfuryl alcohol is added, saving energy.

The invention provides a synthesis method of 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole, which comprises the following steps: mixing isovaleric acid with a catalyst, pumping the mixture and liquid chlorine into a mixer, uniformly mixing, and slowly introducing the mixture into a microchannel for reaction to obtain 2-chloroisovaleric acid; s2, uniformly mixing 2-chloroisovaleric acid in S1 with an acylation reagent, and slowly introducing the mixture into the microchannel for reaction to obtain 3, 3-dimethyl crotonyl chloride; adding hydroxylamine hydrochloride or hydroxylamine sulfate and a solvent into the 3, 3-dimethyl crotonyl chloride in the step S2 in a reaction kettle for dissolving, controlling the temperature of the system to be 0-30 DEG C while stirring, adding alkali in batches, and stirring for reaction to obtain 5, 5-dimethyl-3-isoxazolidinone; and S3, diluting the 5, 5-dimethyl-3-isoxazolidinone obtained in the step S3 and a chlorination reagent with a solvent respectively, and then pumping the diluted 5, 5-dimethyl-3-isoxazolidinone and the chlorination reagent into the microchannel reactor respectively for reaction to obtain the 3-chloro-5, 5-dimethyl-4, 5-dihydroisoxazole. In the production process, tail gas is single in component and convenient to treat, and environmental protection pressure is small; meanwhile, the used main raw materials are bulk and cheap chemicals, so that the production cost is lower.

The utility model discloses a liquid chlorine gasification mixing device which comprises a mixing tank, the bottom side in the mixing tank is rotatably connected with a gas distribution box, the top end of the gas distribution box is uniformly provided with a plurality of first gas nozzles, the bottom end of the gas distribution box is communicated with a chlorine pipeline, and the chlorine pipeline is rotatably connected with the mixing tank in a sealed mode. A sealing cover is mounted at the top end of the mixing tank, a gas outlet pipe communicates with the sealing cover, a nitrogen pipeline is rotationally connected to the sealing cover in a sealed mode, a plurality of gas spraying pipes communicate with the bottom side of the outer portion of the nitrogen pipeline, a plurality of second gas spraying openings are formed in the bottom ends of the gas spraying pipes, and driving mechanisms are mounted at the top end of the sealing cover and the bottom end of the mixing tank; the two driving mechanisms respectively drive the chlorine gas pipeline and the nitrogen gas pipeline to rotate, so that nitrogen gas and chlorine gas can be conveniently and uniformly conveyed into the mixing tank, meanwhile, the nitrogen gas and the chlorine gas can be stirred, and the nitrogen gas and chlorine gas mixing effect is improved.

The invention belongs to the technical field of chemical synthesis, and relates to a lithium battery electrolyte raw material production technology, in particular to a preparation method of phosphorus pentafluoride. The method comprises the following steps: adding phosphorus trichloride, liquid chlorine and hydrogen fluoride into a reactor in proportion, and reacting to prepare hydrogen chloride and phosphorus pentafluoride; the molar ratio of phosphorus trichloride to liquid chlorine to hydrogen fluoride is preferably 1: 1: 5, and the reactor comprises a bottom reaction section, a middle filler section and a top condensation section. The working pressure of the reactor is 0.1-3.0 MpaG, the temperature of the reaction section is 0-40 DEG C, and the temperature of the condensation section is-20 to-60 DEG C. The mixed gas of phosphorus pentafluoride and hydrogen chloride can be prepared in one step and conveyed to the rear end to be refined and separated. The method has the advantages of simple process flow, easily available raw materials, low production cost and high efficiency.

The invention provides a method for preparing chlorosulfonated polyethylene through supercritical reaction, and belongs to the technical field of chlorosulfonated polyethylene preparation. The method comprises the following steps: adding a first initiator and first liquid chlorine into a mixed system containing chlorinated polyethylene and a medium, and carrying out chlorination reaction under supercritical conditions to obtain a chlorinated product; and mixing the chlorination product, liquid sulfur dioxide, a second initiator and second liquid chlorine, and carrying out chlorosulfonation reaction under supercritical conditions to obtain the chlorosulfonated polyethylene. According to the invention, carbon dioxide, liquid nitrogen or hydrogen chloride is adopted as a medium, and chlorination reaction is carried out under the supercritical condition, so that an organic chlorine solvent is prevented from being used in the reaction process; the problems of environmental pollution caused by escape of the organic chlorine solvent and poison to operators caused by volatilization of the residual organic chlorine solvent in the product in the processing and using process can be solved, and the corrosion to equipment is small.

The utility model discloses liquid chlorine secondary recovery reaction equipment, which relates to the technical field of liquid chlorine recovery, and comprises a base, a kettle body fixed on the base and a tail gas treatment tank with the side surfaces communicated with each other through a connecting pipeline, a rotating motor is arranged below the kettle body, a rotating shaft is fixed on an output shaft of the rotating motor, and a bearing is sleeved on the surface of the rotating shaft. The bearing is embedded at the bottom end of the kettle body, a butterfly-shaped disc is fixed on the surface of a rotating shaft penetrating through the bearing and extending into the kettle body, a gas pipeline is fixed right above the butterfly-shaped disc, exhaust holes are uniformly formed in the surfaces of the gas pipeline and the butterfly-shaped disc, a rotating clamping ring is fixed on the gas pipeline penetrating through a kettle cover above the kettle body, and a gas inlet pipeline is clamped on the surface of the rotating clamping ring. The reaction kettle is reasonable in design structure, and can rotate under the driving of the rotating motor through the butterfly-shaped disc, so that liquid chlorine is fully stirred and dispersed in the kettle body after being discharged from the gas pipeline and the butterfly-shaped disc exhaust holes, and is uniformly distributed in reaction liquid, the contact area is increased, the reaction rate is accelerated, and the primary reaction efficiency of the liquid chlorine is improved.