59 results about "Acid preparations" patented technology

The invention relates to a hydroiodic acid preparation device and method, and relates to the technical field of new energy. The hydriodic acid preparation device comprises a first phosphoric acid circulating device, a second phosphoric acid circulating device, a hydriodic acid circulating device, a deiodide ion device and a membrane module, and the membrane module comprises a first phosphoric acid chamber, a second phosphoric acid chamber and a hydriodic acid chamber which are sequentially arranged and are in fluid communication. The second phosphoric acid chamber is communicated with the iodide ion removal device, so that even if a small amount of iodide ions enter the second phosphoric acid chamber, the iodide ions can enter the iodide ion removal device along with the circulation of the liquid to be subjected to deiodination treatment, the liquid subjected to deiodination treatment returns to the membrane module again to be recycled, and at the moment, the iodide ions contained in the circulating liquid do not exceed the standard; the iodide ions in the second phosphoric acid chamber cannot migrate to the first phosphoric acid chamber, so that the anode membrane cannot be damaged due to migration of the iodide ions, the service life of the membrane module can be greatly prolonged, and the production efficiency of the membrane module can be greatly improved.

The utility model relates to a nickel sulfate solution oil removal and acid preparation process acid mist treatment system, which comprises an alkali liquor source and a washing assembly, the washing assembly comprises an acid mist absorption tower, a circulation box, a reflux pump, a sprayer and a PH detector, a reflux inlet of the acid mist absorption tower is communicated with the circulation box, the circulation box is provided with an alkali adding port communicated with the alkali liquor source, and the alkali adding port is communicated with the alkali liquor source. A liquid outlet of the circulation box is communicated with the sprayer through the reflux pump, the sprayer is mounted in the acid mist absorption tower, the PH detector is mounted on the circulation box, and the detection end of the PH detector extends into the circulation box; the circulating box can receive a solution from the bottom of the acid mist absorption tower, alkali liquor is added into the circulating box through the alkali liquor source so as to accurately adjust the pH value of the solution in the circulating box, and the pH value is adjusted in the circulating box instead of the acid mist absorption tower, so that the pH value of the solution can be accurately adjusted in the process of adjusting the pH value of the solution. And the pH value of the solution sprayed by the sprayer can be accurately controlled through the reflux pump.

A dispenser for receiving and evaporating a liquid formic acid preparation for combatting varroa mites in a bee hive, the dispenser including an evaporation surface, an evaporation container; a storage container connected to the evaporation container and sealed from the outside in a vapour-tight manner for storing an entire treatment dose of the liquid formic acid preparation; a closable liquid-conducting connection between the storage container and the evaporation container for transferring the liquid formic acid preparation from the storage container to the evaporation container; wherein the evaporation surface is a gas-permeable, fine-pored membrane with a solid content of less than 70% and continuous, exclusively gas-filled pores with a width of between 10 nm and 1000 nm as part of an outer boundary of the evaporation container, the membrane impermeable to liquid mixtures of formic acid and water and liquid-tight under the dynamic pressure of the liquid formic acid preparation.

The utility model discloses an electrolyte additive feeding device. Belongs to the technical field of lead-acid storage battery acid preparation. The problems that fumed silica powder drifts away, personal safety hazards exist and environmental pollution exists during manual weighing and adding in the prior art are mainly solved. The device is mainly characterized by consisting of a storage tank, a feeding tank, an acid preparation tank, a powder flowmeter, a high-pressure gas source, a negative pressure system, a connecting pipeline and a control valve, the storage tank, the feeding tank and the acid preparation tank are all closed tank bodies; a powder flow meter is arranged on a connecting pipeline between the storage tank and the feeding tank; a control valve is arranged on the discharge pipe between the feed tank and the acid preparation tank; and control valves are arranged on connecting pipelines for connecting the high-pressure air source and the negative-pressure system with the feeding tank. The device provided by the utility model has the characteristics that the additive can be weighed in a negative-pressure closed environment and the weighed additive can be directly introduced below the liquid level of the electrolyte, and is mainly used for weighing and adding fumed silica in the process of preparing the electrolyte of the storage battery.

This invention belongs to the field of oil and gas field development technology, and specifically relates to an acid tank preparation and filtration device. It includes a first installation pipe, a second installation pipe, and an acid preparation and circulation pipeline fixedly installed between the first and second installation pipes. The first and second installation pipes are connected to the acid preparation and circulation pipeline via unions. A first valve and a second valve are respectively installed on the first and second installation pipes. A filter screen is installed inside the acid preparation and circulation pipeline. This invention utilizes the circulation time of the prepared acid solution to filter difficult-to-dissolve chemical materials and other solid particles in the acid tank, saving water used for cleaning the acid tank, reducing the safety risks of cleaning the acid tank, lowering the probability of fracturing trucks running dry, improving the first-time success rate of acid fracturing operations, greatly simplifying the acid tank cleaning process, and providing convenient maintenance and safe filtration operations.

The utility model relates to the technical field of composite acid preparation processing, and provides a composite acid preparation adding and mixing device which comprises a mixing barrel for adding a composite acid preparation, an adjusting assembly for adjusting the direction of the mixing barrel is arranged between the mixing barrel and a wall body, and a fixing plate is transversely arranged at the top end of the mixing barrel. A rotating part is vertically fixed in the middle of the fixing plate, the output end of the rotating part is connected with a rotating shaft extending to the mixing barrel, a stirring disc for stirring the mixing barrel is arranged at the bottom of the rotating shaft, a liquid outlet is communicated with the middle of the bottom end of the mixing barrel, and a stirring rod is connected to the position, located in the liquid outlet, of the bottom of the rotating shaft in a sleeving mode. Through the use of the adjusting assembly, the direction of the mixing barrel after installation can be adjusted, the use of the rotating piece drives the rotating shaft to rotate, the rotation of the rotating shaft drives the stirring disc to stir the composite acid preparation in the mixing barrel, and the rotation of the stirring rod is convenient to drive the rotation of the interior of the liquid outlet.

The utility model discloses a device for quantitatively producing low-concentration acid, which comprises a raw material box for containing solid raw materials; the conveying tube nest is connected with an outlet of the raw material box and used for conveying solid raw materials; the reaction chamber wraps the conveying tube nest, a water inlet is formed in one side of the reaction chamber, an acid outlet is formed in the other side of the reaction chamber, and a dosing port is formed in the other side of the reaction chamber; a plurality of reaction holes are formed in the surfaces of the conveying tube nests, and liquid fed from the dosing port and the water inlet enters from the reaction holes and reacts with the solid raw materials. And a circulating pipe is arranged between the acid outlet and the water inlet. A heat tracing band is arranged on one side, close to the acid outlet, of the circulating pipe. A drain outlet is formed in one side of the reaction chamber. And a transparent observation window is arranged on the raw material box. And a pH sensor is arranged at the acid outlet. The problems that existing acid preparation equipment is high in cost, poor in flexibility and low in safety are solved.

The utility model discloses a BE acid preparation device, which relates to the technical field of chemical engineering and comprises a chlorobenzene cleaning high-level tank, an ethylbenzene storage tank, a feeding bin, an acylation reaction kettle, a hydrolysis kettle and a condenser group, and the acylation reaction kettle is connected with the hydrolysis kettle through a pipeline. Therefore, the tail gas generated in the hydrolysis kettle is sent to the condenser set for condensation treatment, reaction raw materials such as ethylbenzene and chlorobenzene evaporated due to high temperature are promoted to be condensed and recycled, the cost is reduced, and waste of the raw materials is avoided.

The utility model relates to the technical field of acid preparation devices, and discloses an acid preparation device applied to lithium battery recovery, which comprises a gas filter box, an upper cover and a receiving box, the receiving box is positioned in the gas filter box, a plurality of exhaust holes are arranged at the bottom of the receiving box, a filter layer is arranged at the top of each exhaust hole, and the upper cover is arranged at the bottom of the receiving box. The filtering layer is laid in the receiving box, the upper cover is located at the top of the filtering layer and fixedly connected to the top of the gas filtering box through bolts, the top of the upper cover is fixedly connected with a first smoke inlet pipe and a second smoke inlet pipe, and the top ends of the first smoke inlet pipe and the second smoke inlet pipe are fixedly connected with smoke pipes. Acid gas in the acid preparation tank and the storage tank is exhausted into the gas filter box through the flue gas pipe, harmful substances are filtered by the acid gas through the filter layer, so that the acid gas is purified, the purified gas enters the exhaust cavity through the exhaust hole and then is exhausted out of the gas filter box through the vent hole, and the filter layer is convenient to replace.

The utility model discloses an acid burning device for preparing regenerated sulfuric acid by blending with waste alkane from waste acid, which relates to the technical field of waste acid preparation, and comprises an incinerator, a natural gas inlet pipeline and an air inlet pipeline, a spray head is arranged at the discharging end of the feeding pipeline and discharges materials into the incinerator, the spray head comprises a spray base and a nozzle, and a static mixer is arranged on the feeding pipeline in the feeding conveying direction. The feeding end of the feeding pipeline is communicated with a waste alkane inlet pipeline and a waste acid inlet pipeline. On the basis of the existing structure, a set of waste alkane blending combustion structure is added, and the waste acid spray head is further improved, so that waste alkane becomes acid combustion fuel, the spray nozzle of the waste acid spray head can be locally replaced, the comprehensive utilization rate is improved, and meanwhile, the cost is saved.

The utility model discloses an automatic acid preparation device of a ceramic machine. The automatic acid preparation device comprises a bracket, a concentrated acid box, an acid preparation box, an acid storage box and a stirring component, the acid preparation box is mounted at the top of the bracket, and the acid storage box is mounted on the side; the top of the acid preparation box is provided with a concentrated acid box, the concentrated acid box is provided with a water inlet pipe with a switch valve and a pipe fitting communicated with the top of the acid storage box, the box body is internally provided with a stirring assembly, and the pipe fitting is further provided with a switch A; the concentrated acid tank is provided with an acid inlet pipe and a liquid discharge pipe, the liquid discharge pipe is communicated with the top of the acid preparation tank, and the acid inlet pipe and the liquid discharge pipe are respectively provided with a switch B and a switch C; a backwash pump is arranged on the side edge of the acid storage barrel; according to the stirring assembly, sufficient mixing is achieved, and the influence of concentration fluctuation on the cleaning effect is avoided; the concentrated acid tank and the acid storage tank are separated, so that continuous production and acid preparation operation can be simultaneously carried out, the production process is optimized, and the production continuity is ensured; the improved acid preparation process is beneficial to reducing the scaling and blocking phenomena of the ceramic plate and maintaining a good working state of equipment.

The utility model provides a kind of sulphuric acid solution preparation device, it is related to sulphuric acid preparation technical field, including shell, the bottom of shell is equipped with a set of electric push rod, the top of electric push rod is equipped with lifting platform, the top of lifting platform is equipped with recess, recess is equipped with clamping assembly, container is equipped between clamping assembly, the top of shell is equipped with U-shaped support, the top of U-shaped support is equipped with motor one, the output end of motor one is connected with rotating disc and penetrates U-shaped support, the bottom of rotating disc is connected with stirring frame by connecting rod, the inside of stirring frame is equipped with cooling liquid pipe, and the side of stirring frame is equipped with rotating rod, the bottom of rotating rod is equipped with liquid receiving tray.This device solves the problem that the present sulphuric acid solution preparation device may have residual solution when in use, direct taking may cause injury and only using the heat dissipation mode of heat dissipation hole, the heat dissipation efficiency is lower.

The invention discloses a microreactor continuous nitration preparation method for 2-amino-4-nitrotoluene. The method comprises the following steps: salt formation: o-toluidine is dropwise added to concentrated sulfuric acid, and water is added to control the temperature to 0-35°C to obtain o-toluidine sulfate; mixed acid preparation: 98% concentrated sulfuric acid is added to 50-75% industrial nitric acid in batches, and the temperature is controlled to be 0-35°C; nitration: o-toluidine sulfate and mixed acid are respectively controlled to enter a microchannel reactor through an injection pump, and gas is introduced simultaneously, the nitration temperature is controlled to be 0-35°C, and the total residence time is 0.5-10 minutes; a microchannel end is treated with water to precipitate a solid, and a water precipitate is obtained by filtration; neutralization: the water precipitate is added to water, neutralized with alkali to neutrality, and filtered to obtain a product. The invention uses 50-75% nitric acid instead of fuming nitric acid, thereby shortening the reaction time and reducing the risk factor of the reaction while ensuring the conversion rate; and changing the size of the microchannel reactor can also increase the production capacity.

The utility model discloses a direct supply device for monoammonium phosphate battery grade slurry, which is used for improving the filling efficiency of a tank truck. The device comprises a first acid preparation tank and a second acid preparation tank which are used for storing and preparing raw material acid; the tubular reaction tank is respectively communicated with the first acid preparation tank and the second acid preparation tank and is used for receiving production acid through a communicated pipeline; the environment-friendly ground tank is respectively communicated with the first acid preparation tank, the second acid preparation tank, the washing tower, the tubular reaction tank, the environment-friendly ground tank and the slurry storage tank and is used for receiving waste materials; the washing tower is communicated with the tubular reaction tank and is used for receiving the waste gas discharged by the tubular reaction tank and washing the waste gas; the buffer tank is communicated with the tubular reaction tank and is used for receiving the slurry output by the tubular reaction tank through a communicated pipeline; the slurry storage tank is communicated with the buffer tank, receives the slurry output by the buffer tank through a communicated pipeline and stores the slurry; and the filling platform is communicated with the slurry storage tank, receives the slurry output by the slurry storage tank through a communicated pipeline, and fills the tank car.

The application discloses a kind of metal plate pickling process, including acid preparation, plate into pool, washing, flushing, air drying.Preferably including the spacer bar that is evenly arranged between upper and lower adjacent plate;Before plate is flushed one by one, it further includes using rotary brush to mechanically clean the surface of plate, and the surface of the rotary brush is evenly distributed with water outlet hole;Air dryer is arranged at the both sides of plate advancing direction, and the air outlet of the air dryer of both sides is staggered corresponding technology.Through the method, steel and other metals (such as titanium, nickel alloy, stainless steel metal plate) pickling can be guided, to the industrialization application of other metal pickling except steel at present, improve the development progress of the pickling process of other metal.And in the subsequent treatment after pickling, the method can further improve the pickling quality and the surface quality of plate by optimizing the process steps such as washing, drying.

The present invention relates to a method for recovering titanium dioxide from waste titanium dioxide acid, comprising the following steps: 1) adding 98% concentrated sulfuric acid to the waste acid produced in the sulfuric acid process for titanium dioxide preparation, wherein the temperature is controlled to not exceed 50°C during the acid preparation process; and 2) aging the mixed solution after the acid preparation process, filtering and separating the mixed solution, and returning the filtrate to the acid hydrolysis step in the sulfuric acid process for titanium dioxide preparation. The method of the present invention can simultaneously reuse the waste acid from the titanium dioxide process and recover titanium by controlling the temperature of the acid preparation process. The method is simple and easy to implement. Furthermore, the method can reduce the titanium content in the ferrous iron (II) obtained from the recovered filter cake, thereby improving the purity and quality of the ferrous iron (II) iron (II).

The invention discloses a preparation method of a polyglycolic acid composition, the composition and application, and relates to the technical field of polymer synthesis, the preparation method of the polyglycolic acid composition comprises the following steps: step 1) carrying out normal pressure condensation polymerization on components including a hydroxy acid monomer, a small molecule initiator, a large molecule initiator and a catalyst; and step 2) continuously performing reduced pressure polycondensation reaction on the reaction system in the step 1) to prepare the polyglycolic acid composition. The polyglycolic acid composition provided by the invention can be prepared in a simple, green and low-cost manner by introducing a macromolecular initiator into a polymerization system, the overall molecular weight and melt viscosity of the polyglycolic acid composition are greatly improved compared with those of an existing one-step polyglycolic acid preparation technology, and the application requirements in the fields of injection molding, film bags, foaming and the like can be met.

The utility model discloses wet-process acid making equipment, and particularly relates to the technical field of wet-process acid making, the wet-process acid making equipment comprises a base, a waste heat boiler, an oxidation reactor and an absorption tower which are sequentially distributed from left to right are fixedly arranged at the top of the base, the waste heat boiler is communicated with the oxidation reactor through a pipeline, and the oxidation reactor is communicated with the absorption tower through a pipeline. The top of the base is fixedly provided with a wastewater recovery assembly, the wastewater recovery assembly comprises a sedimentation tank and a filtering tank which are fixed at the top of the base, the sedimentation tank is respectively communicated with the waste heat boiler, the oxidation reactor and the absorption tower, and a detachable hollow pipe is fixedly arranged in the filtering tank. According to the utility model, the waste heat boiler, the oxidation reactor and the absorption tower are matched to prepare acid, and the settling pond and the filtering tank are matched to filter wastewater generated by acid preparation, so that the wastewater can be recycled, the consumption of water resources can be reduced, and the production cost can be reduced.

The invention discloses a crude product 2B acid production method, and relates to the technical field of 2B acid preparation, and the method comprises the following steps: S1, adding 2B oil and a D60 solvent into a sulfonation kettle according to a mass ratio of 1: 2-4, and carrying out a sulfonation reaction to obtain a sulfonation reactant; s2, the sulfonation reactant is moved into a baking kettle for baking transposition, and dried powder is obtained; s3, mechanically crushing the dried powder to obtain 2B acid crude fine powder; s4, adding the 2B acid crude fine powder and organic alcohol into extraction equipment according to the mass ratio of 1: (2-5) for extraction, and carrying out solid-liquid separation on extract liquor through a filter cloth dehydration device to obtain a preliminarily dehydrated wet solid; s5, carrying out flash evaporation drying on the preliminarily dehydrated wet solid to obtain a crude product 2B acid with high purity; according to the method disclosed by the invention, the step of extracting and washing with the organic alcohol is added after crushing, so that the 2B oil can be transferred to a liquid phase and is filtered and separated, the residual quantity of the 2B oil in the finally obtained crude product 2B acid is greatly reduced, and the purity is obviously improved.

The utility model discloses a stirring device for amino K acid preparation, and relates to the technical field of amino K acid preparation. The stirring device comprises a stirring tank, a hydraulic supporting column is installed in the center of the stirring tank, a hydraulic telescopic rod is installed at the top end of the hydraulic supporting column, and a driving motor is arranged above the hydraulic telescopic rod; a stirring plate is arranged on the outer side of the hydraulic supporting column, and a circulating scraping plate is arranged on the outer side of the stirring plate; solid particles are fished and collected while a solvent is stirred through a stirring plate, the stirring plate is lifted through a hydraulic telescopic rod after the solvent is mixed, so that the generated solid particles and impurities are removed from the solvent, the purity of the solvent is improved, and in the stirring process, through cooperation of a fixing clamping rod and a fixing clamping groove, the stirring effect is good. The driving motor is fixed, rotation of the driving motor is avoided, the stability in the stirring process is improved, meanwhile, the stirring tank is sealed through the sealing top cover in the stirring process, and splashing of a solvent is avoided.

The invention discloses a method for predicting temperature change in preparation of nitric acid and sulfuric acid, and belongs to the technical field of chemical production. The temperature rise influence factors in the acid preparation process are explored in combination with a control variable method, the content of waste acid components HNO3 and H2O and the initial temperature are determined as key influence factors, and the preparation amount of waste acid, the stirring speed and the feeding mode are not influenced; meanwhile, flow simulation software is adopted for simulation, an ELCNRTL physical property method is selected, the acid preparation technological process is simulated, and the consistency of a simulation result and a test result is verified. According to the method, a theoretical basis is provided for heat regulation and control of the acid preparation reaction, temperature rise can be accurately predicted and regulated and controlled, production is guided through simulation, equipment corrosion and safety risks are reduced, test cost is reduced, and data support is provided for production device design and process improvement.

An acid preparation cart comprises a plurality of side walls and a space defined by the plurality of side walls. The acid preparation cart is provided with a plurality of side walls and a space, the space allows a container to be placed in, the acid preparation cart is provided with a plurality of operation openings formed in the side walls respectively, the operation openings are formed in the side walls independently or in pairs, and the height of the operation openings on the side walls is at least higher than the highest position of the container. The acid preparation cart is provided with the plurality of operation ports so as to facilitate sampling during acid preparation operation, and the plurality of operation ports on the plurality of side walls enable a user to select at least one of the plurality of operation ports at a proper position to perform sampling action based on the current operation environment.

The application discloses an acid pickling method for electronic-grade polysilicon gradient, which comprises the following steps: carrying out three-stage acid pickling on polysilicon blocks, using the discharge liquid of the next stage acid pickling as the acid pickling liquid of each stage; carrying out high-purity water cleaning on the polysilicon blocks before each acid pickling, and carrying out high-purity water spraying after the first high-purity water cleaning and the last high-purity water cleaning; and finally, carrying out nitrogen drying on the polysilicon blocks after the spraying cleaning. The method has the advantages that the utilization rate of the acid pickling liquid is effectively improved, and the operation cost is reduced through the orderly and multi-stage acid pickling utilization mode. Meanwhile, the acid concentration of the multi-stage utilized acid pickling liquid is reduced, the ion concentration is high, the surface tension of the acid pickling liquid is effectively reduced, the wettability of the acid pickling liquid is higher, the acid pickling liquid can be more deeply in the gaps of the silicon blocks, and the cleaning quality is improved. Compared with other electronic-grade polysilicon processes, the process is simple, the acid preparation links are reduced, the acid discharge is reduced, the treatment cost is saved, the method is more environmentally friendly, and the personnel safety problem is greatly reduced.

This utility model relates to the field of acid preparation technology, specifically disclosing an acid preparation device. The acid preparation device includes a tube body and a spiral baffle. The spiral baffle is disposed in the inner cavity of the tube body and extends spirally around the axis of the tube body. The spiral baffle and the inner wall of the tube body form a spiral channel. The tube body is provided with at least two feed channels at the bottom of the spiral channel and a discharge channel at the top of the spiral channel. The medium entering through the at least two feed channels is mixed through the spiral channel and flows out through the discharge channel. The feed is driven by the pressure of the fluid medium itself or gravity. The spiral channel formed by the spiral baffle forces mixing, eliminating the need for a circulation pump to provide additional power, reducing power consumption and pump wear. The spiral channel forces the inflowing medium to move along the spiral path, generating strong shear force and turbulence, forming fluid disturbance. The geometric constraint of the spiral channel causes the fluid to be divided and recombined multiple times, reducing local concentration unevenness.

The invention discloses a method for producing battery-grade monoammonium phosphate from purified phosphoric acid, which comprises the following steps: mixing an acid solution obtained by mixing purified phosphoric acid and desalted water with liquid ammonia through acid preparation, carrying out neutralization reaction, cooling and crystallizing the obtained neutralized solution, separating to obtain a solid, and drying the solid to obtain monoammonium phosphate. According to the production method of the purified phosphoric acid, the raw acid does not contain substances needing impurity removal, the utilization rate of the mother liquor is high, and phosphorus pentoxide can be completely utilized, so that the process flow is reduced, only the steps of neutralization, crystallization and drying are needed, the energy consumption is saved, and the production profit is effectively improved. The method does not need impurity removal equipment, so that the production cost can be reduced.

The utility model provides a pressure leaching process two-stage normal pressure front liquid automatic acid preparation control device which comprises a front liquid acid preparation tank, the front liquid acid preparation tank is connected with a sulfuric acid pipeline, the sulfuric acid pipeline is connected with a sulfuric acid storage tank, the sulfuric acid pipeline is provided with a sulfuric acid metering pump, the sulfuric acid metering pump is connected with a controller, and the controller is connected with the front liquid acid preparation tank. A front liquid level meter and a pH meter are arranged on the front liquid acid preparation tank, and the controller is respectively connected with the front liquid level meter and the pH meter. According to the utility model, the pH meter is arranged on the pre-liquid acid preparation tank, the pH value of the pre-liquid in the pre-liquid acid preparation tank is automatically detected through the pH meter, and then the sulfuric acid metering pump is automatically controlled by the controller to input sulfuric acid into the pre-liquid acid preparation tank to adjust the pH value of the pre-liquid according to the pH value of the pre-liquid, so that the pH value of the pre-liquid meets the corresponding requirements, the operation is simple, and the manpower is greatly saved.

The utility model relates to a concentrated nitric acid liquid taking device with a pressure stabilizing function, which belongs to the technical field of storage devices and comprises a pressure pump, a nitric acid tank, a liquid taking pipeline, an acid return pipeline, a pressure relief pipeline, a metering pump, a pressure stabilizing device, a PLC (programmable logic controller) electric control system and a mixer. A check valve is arranged in front of the metering pump, the liquid taking pipeline is connected with a pressure stabilizing device, an acid return pipeline is arranged below the pressure stabilizing device, the acid return pipeline is communicated with an initial section of the liquid taking pipeline, the pressure stabilizing device is communicated with a mixer, and the mixture enters a mixing pool to be subjected to extraction reaction with a wastewater solution after being mixed by the mixer. The device solves the problems that the pH value in the acid preparation process is inaccurate and the production is not smooth due to the fact that the flow of nitric acid pumped out by the metering pump is unstable and is in an unstable high and low state, and the production efficiency and the production safety are improved.

The utility model relates to the technical field of liquid acid preparation processing equipment, and discloses a liquid acid preparation production, feeding and stirring device which comprises a device body, a plurality of supporting columns are welded to the bottom of the device body, a protective shell is installed at the bottom of the device body, and through mutual cooperation of structures such as a connecting frame and a turning plate, the device body is connected with the protective shell. Therefore, materials adhering to the inner wall of the stirring cavity can be scraped off through the connecting frame tightly attached to the inner wall of the stirring cavity, the materials are saved, meanwhile, the attached materials are prevented from influencing the next production process, and due to the fact that the bottom of the connecting frame is tightly attached to the inner wall of the bottom of the stirring cavity, accumulated materials can be quickly scattered, and the production efficiency is improved. Meanwhile, materials can be well stirred and turned over through a plurality of turning plates arranged on the connecting frame at intervals, the stirring process is shortened while the stirring effect is guaranteed, and therefore the working efficiency is improved.

The invention relates to the technical field of tembotrione acid preparation, and provides a tembotrione acid preparation method, which comprises: mixing 3-chloro-2-methyl phenyl methyl sulfide, 1, 2-dichloroethane, azodiisobutyronitrile and N-bromosuccinimide, stirring at a controlled temperature, and extracting to obtain 3-chloro-2-bromomethyl phenyl methyl sulfide; the preparation method comprises the following steps: mixing 3-chloro-2-bromomethyl phenyl methyl sulfide, trifluoroethanol, solid sodium hydroxide, TBAB and 1, 2-dichloroethane, stirring at a controlled temperature, and extracting to obtain 3-chloro-2-((2, 2, 2-trifluoroethoxy) methyl) phenyl methyl sulfide; the preparation method comprises the following steps: mixing 3-chloro-2-((2, 2, 2-trifluoroethoxy) methyl) phenylmethyl sulfide, anhydrous aluminum trichloride, dichloromethane and oxalyl chloride, stirring at a controlled temperature, heating, cooling, carrying out suction filtration, and drying to obtain 2-chloro-4-methylthio-3-((2, 2, 2-trifluoroethoxy) methyl) benzoic acid; the method comprises the following steps: oxidizing 2-chloro-4-methylthio-3-((2, 2, 2-trifluoroethoxy) methyl) benzoic acid, and extracting to obtain tembotrione acid. According to the method, the stability of the preparation yield of tembotrione acid and the total yield are remarkably improved.

The invention relates to the technical field of material conveying, and provides an acid preparing and material conveying device and method.The acid preparing and material conveying device for furfural production comprises an acid preparing barrel and a material conveying pipe, the material conveying pipe is communicated with the bottom of the acid preparing barrel, and a valve is installed on the material conveying pipe; the acid preparation device further comprises a feeding mechanism, a stirring assembly, a first heat preservation cover, a second heat preservation cover, a temperature adjusting pipe and a temperature sensor, the feeding mechanism is used for adding materials into the acid preparation barrel, the stirring assembly is arranged in the acid preparation barrel and used for mechanically stirring the materials, and the first heat preservation cover fixedly sleeves the material conveying pipe and communicates with a water inlet pipe; the second heat preservation cover is fixedly arranged outside the acid preparation barrel in a sleeving mode and communicated with the first heat preservation cover, and the temperature sensor is installed in the acid preparation barrel. By means of the technical scheme, the technical problem that in the prior art, the temperature of raw materials in all positions in an acid preparation device is not uniform is solved.