26 results about "Acid preparations" patented technology

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.

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 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 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 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.

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 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.

This invention relates to the field of acid preparation technology, and more particularly to an automated hydrolysis acid preparation device, comprising a preparation unit, a control unit, and two metering units. The preparation unit includes an acid preparation cylinder with a temperature regulating chamber and an insulation layer, a stirring mechanism, and thermocouples to achieve material mixing and temperature control. The metering unit has multiple metering cylinders and regulating cylinders of different volumes, achieving high-precision volume measurement through a drive plate, piston rod, and locking structure, and can automatically combine multiple metering cylinders to complete the output of a specified volume. The control unit receives temperature and signal data and coordinates the metering and preparation process. This invention can accurately control the volume ratio of solute to solvent and the reaction temperature, improving the accuracy of acid concentration, operational safety, and automation level, and is applicable to acid preparation processes with high requirements in various industries.

The invention relates to a sulfur foam liquid salt extraction and acid making coupling process, which comprises the following steps: carrying out solid-liquid separation on sulfur foam liquid to obtain a first solid material and a first liquid material, decoloring the first liquid material, and concentrating to obtain a slurry material and a second liquid material; the first solid material and the slurry material are incinerated, and first synthesis gas is obtained and used for preparing concentrated sulfuric acid; and cooling the second liquid material, and centrifuging to obtain ammonium thiocyanate. The sulfur foam liquid is subjected to solid-liquid separation, so that the waste liquid amount is reduced, the equipment volume in the salt extraction area is reduced, and the cost is reduced. An oxidation process in the salt extraction area is canceled, ammonium thiosulfate is subjected to high-temperature concentration and then is subjected to centrifugal separation to obtain crystals, the crystals and the separated ammonium sulfate are sent to the acid making area to be incinerated, and generated tail gas is sent to a desulfurization and denitrification section of a coking plant to be treated, so that emission without solid waste is realized, and maximum utilization of sulfur element and ammonium thiocyanate in sulfur foam liquid is realized.

The present application relates to 2-acrylamido-2-methylpropanesulfonic acid preparation technical field, disclose a kind of continuously preparing 2-acrylamido-2-methylpropanesulfonic acid method and device.The method includes the following steps: (1) sulfuric acid and acrylonitrile are continuously passed into first microchannel mixer and mixed, obtain mixed liquor 1;(2) ethanol, glacial acetic acid and water are continuously passed into second microchannel mixer and mixed, obtain mixed liquor 2;(3) mixed liquor 1, mixed liquor 2 and isobutene are continuously passed into microchannel reactor and reacted to obtain the product containing 2-acrylamido-2-methylpropanesulfonic acid.The method of the present application can continuously produce 2-acrylamido-2-methylpropanesulfonic acid, using the method of the present application can omit curing and product refining step, operation is more simple, greatly shorten the reaction time, improve production efficiency, and the yield and purity of product are high.

The utility model relates to the technical field of sulfuric acid preparation, and discloses a refined sulfuric acid absorption tower capable of uniformly distributing acid based on low-temperature decomposition, which comprises a treatment tower assembly, the treatment tower assembly comprises a tower body, the left side of the inner cavity of the tower body is communicated with a gas inlet pipe, the bottom of the tower body is communicated with a liquid discharge pipe, a filler body is arranged in the tower body, and the filler body is arranged in the tower body. The right side of the inner cavity of the tower body is communicated with a circulating pipe, and the top of the tower body is communicated with an exhaust pipe. According to the acid spraying tower, acid can be uniformly distributed, the collecting hopper can rotate after acid spraying, drainage treatment is carried out by matching with the drainage strip and the flow dividing groove, primary liquid separation can be carried out, transmitted acid liquid can be drained and discharged through the multiple spraying holes, the distribution uniformity of the acid liquid in the tower body is ensured, secondary liquid separation can be carried out, and the acid spraying efficiency is improved. Falling acid liquor can be further guided and conveyed, the distribution uniformity of the acid liquor in the tower body is improved, and the wall flow phenomenon is well coped with.

The present application belongs to the technical field of veterinary nutritional supplements or feed additives, and particularly relates to a rumen-protected folic acid preparation, a preparation method thereof and application thereof in improving lactation performance of ruminants. The rumen-protected folic acid preparation prepared by the present application is double-coated, and the degradation rate thereof in the rumen can be as low as 12.5% in 12 hours, and the release rate thereof in the small intestine can be as high as 71.7%, effectively solving the technical problem that more than 95% of ordinary folic acid is degraded in the rumen, and significantly improving the absorption and utilization rate of 5-methyltetrahydrofolic acid (5-MTHF) in the small intestine. In addition, ordinary folic acid needs to be reduced by dihydrofolic acid reductase (DHFR) and methylene tetrahydrofolic acid reductase (MTHFR) in two steps to generate active 5-MTHF, and the metabolic efficiency is limited; the present application directly supplements 5-MTHF, bypasses the metabolic bottleneck, and has a more direct and efficient effect, and thus can significantly improve the lactation performance and milk quality of ruminants.

The utility model relates to drying equipment for tembotrione acid preparation, which comprises a drying frame and a drying mechanism, the drying mechanism is arranged in the drying frame, and a drying assembly for drying raw materials is arranged in the drying frame. The drying assembly comprises rotating shafts, rotating plates, a drying annular plate, a motor, a first door plate, a second door plate, a paving frame, a paving plate, a fixing plate, a threaded column, a first bevel gear, a second bevel gear and a rotary knob, the rotating shafts are rotationally installed on the two sides of the inner wall of the drying frame, the rotating plates are fixedly installed on one sides of the rotating shafts, and the drying annular plate is fixedly installed between the rotating plates; the motor is fixedly installed on one side of the drying frame. The rotating shaft is connected with the output end of the motor. The raw materials can be fully dried through the arranged drying assembly, so that the situation that the raw materials cannot be fully dried by the drying mechanism due to the fact that the raw materials cannot be turned over by the spreading plate is prevented, and the drying effect of the drying equipment on the raw materials is improved.

The utility model discloses an acid preparation device and an acid pickling processing system. The acid preparation device comprises a first accommodating part, a second accommodating part, an overflow tank and an acid storage tank, wherein the first accommodating part is used for storing an oxalic acid raw material; the second accommodating piece is used for storing hydrofluoric acid stock solution; the overflow tank is communicated with a feeding pipeline, a first liquid conveying pipeline and a first circulating pipeline, the first circulating pipeline is used for inputting raw acid liquid into the overflow tank, the feeding pipeline is communicated with the first accommodating part and is used for adding an oxalic acid raw material into the overflow tank, and the first liquid conveying pipeline is communicated with the acid storage tank and is used for inputting oxalic acid liquid into the acid storage tank; the second containing part is communicated with a second liquid conveying pipeline, and the second liquid conveying pipeline is communicated with the acid storage tank and used for conveying hydrofluoric acid stock solution into the acid storage tank; the acid storage tank is communicated with a second circulating pipeline which can receive the oxalic acid liquor and the hydrofluoric acid stock solution and mix the oxalic acid liquor and the hydrofluoric acid stock solution to form new acid liquor, and the second circulating pipeline is used for outputting the new acid liquor. The acid preparation device can realize automation and sealing of the whole acid preparation process.

The invention relates to a method for simultaneously determining salicylic acid and acetylsalicylic acid. The method is based on ultraviolet-visible spectrophotometry, iron ions and salicylic acid containing phenolic hydroxyl groups form a complex for developing, the problem that ultraviolet absorption spectrums of salicylic acid and acetylsalicylic acid are overlapped is successfully solved, and a linear relation between concentration and absorbance of salicylic acid and acetylsalicylic acid in different absorption wavelengths is established. Therefore, simultaneous quantitative determination of the two is realized. The method has the advantages of high selection specificity, high accuracy, low analysis cost, rapidness, simplicity and convenience in operation and the like. The method can be used for quantitative determination and purity determination of acetylsalicylic acid in actual production and scientific research, and determination of acetylsalicylic acid hydrolysis rate and drug validity period, can also be used for evaluating results of acetylsalicylic acid preparation experiments, provides teaching reference for chemical experiment courses in colleges and universities, and has a wide application prospect.

This invention discloses a method for preparing 3,5,5-trimethylhexanoic acid and its application, belonging to the technical field of 3,5,5-trimethylhexanoic acid preparation. The method for preparing 3,5,5-trimethylhexanoic acid includes the following steps: S1, dehydrating tert-butanol to prepare isobutylene; wherein the tert-butanol used contains <0.3% by mass of n-propanol, <0.3% by mass of isopropanol, <0.3% by mass of n-butanol, and <0.3% by mass of isobutanol; S2, preparing diisobutylene from the isobutylene obtained in S1; S3, preparing 3,5,5-trimethylhexanal from the diisobutylene obtained in S2 via hydroformylation; S4, preparing 3,5,5-trimethylhexanal from the 3,5,5-trimethylhexanal obtained in S3 via oxidation. The 3,5,5-trimethylhexanoic acid obtained by this invention has high purity.

The invention discloses an automatic nitric acid and sulfuric acid preparation method. The method comprises the following steps: mounting specific gravity probes, conductivity probes and near-infrared transmission-type optical fiber probes in a waste acid tank with a stirring function and an acid preparation tank with a stirring function; the components of nitric acid, sulfuric acid and water in the waste acid tank and the acid preparation tank are obtained through data collected by the near-infrared transmission type optical fiber probe or the specific gravity probe and the conductivity probe, so that the waste acid, nitric acid and sulfuric acid are added into the acid preparation tank according to a proper proportion, and the preparation requirement is met. According to the invention, the problems of high working intensity and poor safety caused by manual calculation and charging in the existing acid preparation are solved.

The application discloses an automatic sample plate pickling system control method, belonging to the field of control. Liquid level detection devices are arranged in acid and alkali liquid recovery tanks respectively; a water receiving tray position detection device is arranged in a liquid recovery switching system; a wastewater neutralization tank is arranged at the outlet end of the acid liquid recovery tank and the alkali liquid recovery tank; a pH measuring instrument is arranged in the wastewater neutralization tank; a PLC is arranged, and the PLC is automatically controlled to open and close motors, acid and alkali resistant water pumps, pipeline electromagnetic valves, air pumps and other equipment according to programs, so as to complete sample plate pickling operation, waste liquid neutralization operation, acid preparation operation and acid mist tower discharge operation. The sample plate pickling operation, the waste liquid neutralization operation, the acid preparation operation and the acid mist tower discharge operation are integrated into an automatic operation system through the PLC, so that the pickling operation efficiency is improved, the operation intensity is reduced, the pickling quality of the sample plate is ensured, and personal safety and operation safety coefficient in pickling operation and acid replacement operation are ensured. The application is suitable for the field of cold-rolled base plate pickling operation in hot-rolled production.

The application provides a multi-layer penetration controlled-release acid preparation and a preparation method thereof, and belongs to the field of cosmetics. The preparation is composed of Aspergillus oryzae fermentation substrate freeze-dried powder, composite alpha-hydroxy acid, salicylic acid, poloxamer 407, polyhydric alcohol and non-ionic surfactant. The freeze-dried powder is obtained by co-fermenting olea europaea leaves and curcuma and refining through ultrafiltration. A temperature-sensitive phase change system is constructed by using poloxamer, so that the product is changed from a liquid state to a gel state at body temperature, and the synergistic controlled release of acid components and bioactive substances is realized. The preparation process adopts low-temperature swelling and vacuum freeze-drying technology, so that the stability of the system and the efficiency of the active substances are ensured. The application significantly reduces the irritation of high-concentration acid, improves the black suppression and repair effect, and is suitable for precise improvement of hyperpigmentation problems such as chloasma.

The invention relates to the technical field of synthesis of fine chemicals for biological medicines, and discloses a selective dehydrofluorination-based 2-fluoroacrylic acid preparation process, which is characterized in that 1, 1-difluoro-2-hydracrylic acid ester as shown in a formula (I) is used as a raw material to prepare 2-fluoroacrylic acid through selective dehydrofluorination reaction under the action of a special composite catalyst, the process comprises the following steps: in the formula (I), CHF2CH (OH) COOR, wherein R is C1-C4 alkyl; the method comprises the following steps: (1) raw material pretreatment: purifying a 1, 1-difluoro-2-hydroxypropionate raw material, and controlling the content of metal impurities in the raw material to be less than or equal to 1ppm and the content of organic impurities to be less than or equal to 0.1%, so that the raw material meets the requirements of subsequent high-selectivity reaction; according to the present invention, the special composite catalyst is prepared by using the Al2O3-ZrO2 composite oxide with the specific composition as the carrier and modifying with the triethanolamine organic amine, such that the selective removal of the specific fluorine atom in the 1, 1-difluoro-2-hydroxypropionate molecule can be accurately promoted by the catalyst so as to effectively inhibit the occurrence of the competitive side reactions such as excessive defluorination, intramolecular dehydration, polymerization and the like.