239 results about "Potassium" patented technology

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention discloses a potassium propionate continuous synthesis process, and relates to the technical field of potassium propionate synthesis, the process comprises the following steps: S1, raw material pretreatment: selecting fermentation waste liquid containing propionic acid and acetic acid and potassium ore leaching liquid containing potassium hydroxide and potassium carbonate as composite raw materials, adding a composite chelating agent into the potassium ore leaching liquid, and uniformly stirring; according to the method, the composite raw material system composed of the fermentation waste liquid and the potassium ore leaching liquid is adopted, and the composite chelating agent is added, so that resource utilization of industrial waste is achieved, the raw material cost is reduced, meanwhile, impurities are prevented from interfering with continuous reaction, and through gradient temperature control-pressure cooperative regulation and linkage regulation of the PLC system, the yield is increased. The problem of product deliquescence caused by local overheating is solved, volatilization loss of propionic acid is reduced, the adaptability of the technology to raw material batch fluctuation is improved through raw material concentration online detection and dynamic parameter adaptation, the continuous production stability is guaranteed, and finally synchronous improvement of the potassium propionate synthesis efficiency and the product quality is achieved.

The invention relates to the technical field of potassium formate preparation, in particular to a device and method for preparing potassium formate through potassium hydroxide, surrounding feeding, compression forming and double cutting are integrated, potassium hydroxide powder enters a surrounding mechanism through an input pump, raw materials are randomly fed into a compression shell, accumulation is effectively avoided, a compression piston is driven to ascend and descend in a reciprocating mode, and the potassium formate is prepared. And the powder is extruded into a compact cylinder, and feeding and compression are synchronously controlled, so that the continuous process is ensured. The double-cutting system accurately controls the height of a movable blade through an adjusting support so as to lock the total volume of raw materials, an adjustable blade and a bottom supporting base alternately move, a column body is divided into multiple sections of small columns, the reaction surface area is increased through geometric progression, and accurate regulation and control of the reaction rate are achieved. According to the device, quantitative control of the feeding amount, dynamic adjustment of the reaction rate and cleaning of the operation environment are achieved, and the accuracy and safety of potassium formate preparation are improved.

The invention provides a method for preparing high-purity vanadium pentoxide from a sodium vanadium solution. The method comprises the following steps: firstly, through chromium removal, calcium removal and silicon removal treatment, reducing the contents of chromium, calcium and silicon in the sodium vanadium solution to a target requirement, namely Crlt; the concentration is 0.005 g / L, and the concentration is Cat; 0.01 g / L, Silt; 0.01 g / L; then, aluminum is removed through a two-step method, the pH of the system can be accurately controlled, and the aluminum content in the solution is reduced to be smaller than 0.001 g / L; finally, ammonium salt is added to obtain AMV sediment, after the potassium content in the AMV sediment is preferably controlled to be reduced to 0.001 wt%, calcination is conducted, a vanadium pentoxide product can be obtained, and the sulfur content can be lower than 0.001 wt%.

The invention relates to the technical field of precious metal recovery, in particular to a method and system for recovering gold, silver, palladium and platinum from silver anode slime. S2, palladium precipitation: adding a potassium-magnesium mixture and sodium chlorate into the pre-impregnation liquid obtained in S1 to obtain palladium precipitation residues and platinum precipitation liquid; s3, separating gold; s4, platinum and palladium precipitation: adding a potassium-magnesium mixture and sodium chlorate into the gold separation liquid obtained in S3 to obtain platinum and palladium precipitation residues and platinum and palladium precipitation post-liquid; s5, gold is reduced; s6, platinum and palladium separation, wherein hydroxylamine hydrochloride is added into the platinum and palladium precipitation residues obtained in the step S4, and palladium separation liquid and platinum precipitation residues are obtained; 7, platinum purification, wherein hydroxylamine hydrochloride is added into the platinum precipitation residues obtained in the step 6, and platinum separation liquid is obtained; s8, carrying out primary palladium deposition; s9, carrying out secondary palladium deposition; and S10, palladium is reduced. The recovery rate of palladium is 99% or above, the recovery rate of platinum is 99% or above, the purity of platinum is 99.9%, the purity of palladium is 99.95%, the recovery rate of silver is 98.5% or above, and the recovery rate of gold is 99% or above.

The invention relates to the technical field of monopotassium phosphate production, and discloses a monopotassium phosphate solution purification method and a device thereof.The monopotassium phosphate solution purification method comprises the following steps that S1, a potassium fluoride solution is tempered, S2, activated carbon decoloration is conducted, S3, filter pressing and impurity removal are conducted, S4, heat treatment and sedimentation are conducted, filtrate is heated to 95-105 DEG C and then fed into a heat sedimentation tank for sedimentation separation, and clear liquid overflows to enter a subsequent concentration procedure; the potassium fluoride solution is used for carrying out hardening and tempering reaction, so that calcium and magnesium ions are effectively removed; and adding a small amount of active carbon for decoloration. The treated solution is subjected to filter pressing to remove impurities, and then the steam consumption is remarkably reduced through the closed and pressurized heat treatment and sedimentation process. The process is high in automation degree and low in production cost, and the purity of the final product is superior to the industrial superior product standard.

The application discloses a potassium fluorotantalate crystallization purification method, and relates to the technical field of tantalum hydrometallurgy and fluorotantalate crystallization purification. The method comprises the following steps: filtering a tantalum-containing fluorine acid solution, adding a potassium source and a tantalum-niobium separation type composite crystallization regulator, stirring and complexing, seed induction, controlled cooling crystallization, graded removal of the regulator, solid-liquid separation, and potassium fluoride containing fluorine acid washing to obtain primary purified potassium fluorotantalate crystals, and then redissolving the primary purified potassium fluorotantalate crystals in a fluorine-containing acid solution, correcting the K / Ta molar ratio, repeatedly regulating and crystallizing, graded removal of the regulator, washing, and drying to obtain high-purity potassium fluorotantalate. The regulator can reduce the entrainment of niobium impurities and reduce the residual amount of the regulator itself, thereby improving the purity of the product and the Ta yield.

The invention relates to the technical field of pesticides, and discloses a glyphosate potassium salt crystal form and a preparation method thereof.The X-ray diffraction pattern of the glyphosate potassium salt crystal form comprises at least one characteristic peak in 2theta of 10.213 + / -0.2 degrees, 20.225 + / -0.2 degrees, 20.867 + / -0.2 degrees, 22.861 + / -0.2 degrees and 23.802 + / -0.2 degrees, the weed withering rate peak value of the glyphosate potassium salt 28 days after pesticide application reaches 98.48%, the weeding performance is excellent, and the glyphosate potassium salt can be applied to the field of pesticides. The crystal form has good stability, the mass change is below 0.5% after the crystal form is stored for 10 days under the conditions of humidity of 65% and room temperature, the crystal form has no obvious hygroscopicity and no obvious change, meanwhile, the crystal form has excellent performance in a long-term stability test, and the crystal form structure does not change after long-term storage.

1. The name of the design product: stirring mixing equipment (potassium titanate powder). 2. The use of the design product: potassium titanate powder preparation stirring. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention relates to the technical field of sylvite production, in particular to a material cleaning device for sylvite production. Comprising a cleaning tank body, a top cover is connected to the top of the cleaning tank body, a conveying opening is formed in the top cover, a cleaning rotary drum is rotationally connected to the interior of the cleaning tank body, a plurality of vertically-arranged partition plates are fixedly connected to the outer side of the cleaning rotary drum, the other ends of the partition plates are attached to the inner wall of the cleaning tank body, and a material cleaning basket is connected between every two adjacent partition plates in an up-down sliding mode; water filtering holes are formed in one side, close to the cleaning tank body, of the material cleaning basket; an L-shaped reciprocating driving plate is arranged in the material cleaning basket, a stirring plate is fixedly connected to the bottom of the reciprocating driving plate, and a reciprocating driving device is arranged on the cleaning rotary drum; the problem that the impurity dissolution and separation efficiency is low due to the fact that a large number of materials are accumulated and clustered in a cleaning container and cannot be fully dispersed is effectively solved. The material cleaning device is convenient to use, materials can be continuously cleaned, and the material cleaning efficiency is greatly improved.

This invention provides a method for activating and extracting potassium from potassium feldspar, the method comprising the following steps: (1) ball milling potassium feldspar raw material to obtain pre-activated potassium feldspar powder; the pre-activated potassium feldspar powder is in a near-amorphous state; (2) mixing the pre-activated potassium feldspar powder with an alkaline solution and performing a stirring transformation reaction, followed by a first solid-liquid separation to obtain a transformed solid product; the Si / K molar ratio of the main phase of the transformed solid product does not exceed 2.5; the phase composition of the transformed solid product includes garnet and / or nepheline; (3) mixing the transformed solid product with an acid solution and performing a second solid-liquid separation to obtain a potassium-rich leachate. This invention utilizes a stirring transformation reaction with a mixed alkaline solution to restructure potassium feldspar minerals, increasing the reactivity of potassium, and then dissolving potassium with acid to ultimately obtain a potassium-rich leachate, which is beneficial for further recycling.

The invention provides a nutrient solution formula. The nutrient solution formula comprises organic nitrogen, organic phosphorus, organic potassium, active calcium, quick-acting sulfur, magnesium, zinc, selenium, ferrous sulfate, organic silicon, expanded fertilizer, mineral source humic acid, chitin, live bacterial fertilizer, boric acid, manganese sulfate, zinc sulfate heptahydrate, ammonium molybdate, copper sulfate heptahydrate, disodium iron ethylenediaminetetraacetate, citric acid and water. According to the nutrient solution formula and the preparation system thereof provided by the invention, microelements are added into the formula, so that the nutrient requirements of vegetables during growth are met, the growth of the vegetables is promoted, and meanwhile, citric acid is added, so that the nutrient solution is stable in property, and the effectiveness of the nutrient solution can be kept in a relatively long period; the physiological acid-base reaction caused in the nutrient solution absorption process of the leaf vegetables can be kept stable, the activity of the root system is improved through high water-soluble phosphorus in the formula, the photosynthesis is improved through the magnesium element, long-acting biological sulfur is provided, and continuous energy supply is provided.

The utility model discloses reaction equipment suitable for potassium humate and sodium humate, and relates to the technical field of chemical reaction. The device comprises a bottom plate, a material taking mechanism and a stirring mechanism are arranged on the bottom plate, a hydraulic cylinder is fixedly connected to the top of the bottom plate, a top plate is fixedly connected to an output shaft of the hydraulic cylinder, a stirring barrel is fixedly connected to the top of the bottom plate, and the material taking mechanism comprises a first support rotationally connected to the inner wall of the top plate; a plurality of first grooves are formed in the bottom of the first support, first sliding blocks are slidably connected to the inner walls of the first grooves correspondingly, and charging barrels are arranged in the first sliding blocks correspondingly. According to the reaction equipment disclosed by the utility model, the material taking mechanism is arranged, so that the problems that in the use process of existing reaction equipment suitable for potassium humate and sodium humate, material residues remained after the preparation of the potassium humate and the sodium humate are inconvenient to take out and need to be filtered and separated, so that one more working procedure is generated, and the production cost is increased are solved.

The invention relates to the technical field of analytical chemistry and mineral detection, in particular to a method for detecting potassium element in molybdenum concentrate, which comprises preparation, working curve solution preparation and inductively coupled plasma emission spectrometer detection. Through acid digestion, microwave treatment and instrument parameter optimization, the problem of matrix interference is solved, the detection sensitivity and efficiency are improved, the detection limit is greatly reduced, and the standard recovery rate is improved. The method is suitable for rapid quality monitoring of molybdenum concentrate, can be expanded to detection of other potassium-containing minerals, is combined with automatic equipment or an online monitoring system, improves the detection consistency and real-time performance, and has important application value.

The present invention relates to a potassium magnesium titanate capable of increasing the friction coefficient of a high load region when used in a friction material, the potassium magnesium titanate being represented by the compositional formula KxMg0. 4Ti1. 6O4-y in which x is 0.1 < = x < = 0.6 and y = (0.8-x) / 2, the ratio (Ia / Ib) of the peak area (Ia) at 100 cm <-1 > to 165 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 1-325 cm <-1 > in the Raman spectrum of the potassium magnesium titanate being 0.03 or more, and the ratio (Ia / Ib) of the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > being 0.03 or more. The ratio (Ic / Ib) of the peak area (Ic) at 785 cm <-1 > to 900 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > is 0.40 or less.

The utility model belongs to the field of nutrition intake calculation, and particularly relates to a multilayer disc for calculating daily intake potassium content, which comprises a caliper plate, a display plate rotatably connected to one side of the caliper plate, a first prompt plate and a second prompt plate fixedly connected to the top and the bottom of the display plate respectively, and a fixing rod fixedly connected to the top of the caliper plate. A fixing ring block is fixedly connected to the surface of the fixing rod, and a plurality of hollow grooves are formed in the top of the fixing ring block; according to the utility model, the rotating ring blocks at different positions are rotated to smoothly rotate the prompting blocks and the marking blocks corresponding to ingestion food to the bottoms of the fan-shaped blocks, and before use, the total potassium content of the selected food at the bottoms of the fan-shaped blocks is calculated, so that whether the food can be eaten or not is judged; by means of the method, it is convenient for people to calculate the potassium element taken every day, and the old can also conduct simple calculation and use.

The invention relates to a potassium fluoborate preparation method, which comprises: a, dissolving a certain amount of potassium salt in deionized water, stirring until complete dissolution, and adding a boron-10 complex into a hydrolysis solution according to a certain ratio to achieve complex hydrolysis; b, continuously adding a certain amount of deionized water into the solution obtained in the step a, heating to a certain temperature, and reacting for a certain time; c, cooling the solution to a certain temperature, and then filtering to obtain wet potassium fluoroborate 10; and step d, dispersing the wet potassium fluoroborate 10 into a certain amount of ultrapure water, and filtering and drying the wet potassium fluoroborate 10 to obtain the high-purity potassium fluoroborate 10. According to the invention, direct preparation of potassium fluoboron-10 is realized, the step of firstly converting potassium fluoboron-10 into boric acid in the traditional process is omitted, the process steps are optimized, the reaction time is shortened, the reaction process is reduced, and the utilization rate of boron-10 is increased.

This invention belongs to the field of metal smelting, specifically relating to a sodium-potassium collection device and method for continuous magnesium smelting. The device includes a sodium-potassium collection tube, a tube-changing device, a tube-unloading device, and a tube-changing rotor. The tube-changing rotor is rotatably connected between the tube-changing device and the tube-unloading device, which are respectively fixed to the ground by supports. The tube-changing rotor has multiple through holes, into which the sodium-potassium collection tube is placed. The rotor is driven to rotate by a motor I, and the sodium-potassium collection tube enters the vacuum chamber II of the tube-changing device for K and Na collection. After collection, the collected sodium-potassium collection tube is driven by the tube-changing rotor to the atmospheric pressure chamber II of the tube-unloading device, where it is removed. This invention, by setting a specific sodium-potassium collection device in the continuous magnesium smelting process, can effectively remove sodium and potassium impurities from magnesium vapor, improve the condensation purity of magnesium, reduce refining costs, reduce environmental pollution, and achieve high-purity, low-cost, and continuous production of metallic magnesium.

This invention discloses a method for synthesizing potassium 4-methoxysalicylate based on supramolecular-assisted methylation, belonging to the field of organic synthesis technology. The process is based on supramolecular chemistry principles and includes the following steps: (1) Preparation of a macrocyclic host molecule-methylating agent complex loaded with a methylating agent: The macrocyclic host molecule and the methylating agent are reacted at pH 7-9 and 25-40℃ to form a complex solution; (2) One-pot preparation of the target product: 2,4-dihydroxybenzoic acid is salted with potassium hydroxide, potassium carbonate is added, and the above complex solution is added dropwise. A selective methylation reaction is carried out at 55-65℃. After the reaction is complete, post-treatment yields the product. This invention utilizes the molecular recognition function of the macrocyclic host to achieve highly selective methylation of the 4-hydroxyl group under mild conditions. This process has the advantages of simple operation, high safety, low waste, and recyclable host molecules. The yield of potassium 4-methoxysalicylate can reach over 85%, and the purity exceeds 99.0%.

The application belongs to the technical field of solid drying equipment, and particularly relates to a drying equipment and method for potassium fluoborate production, which comprises a drying cylinder, a heat conduction assembly and a stirring assembly, the heat conduction assembly and the stirring assembly are arranged on the inner side of the drying cylinder, the top end of the drying cylinder is provided with a feeding pipe, and the bottom end of the drying cylinder is provided with a discharging pipe. Compared with the existing vertically arranged cylindrical air duct, the heat conduction assembly greatly increases the contact area between the heat conduction assembly and the powder, and the heat conduction ring and the heat conduction disc can effectively increase the contact time between the heat conduction ring and the heat conduction disc and the powder, form a snakelike material passing channel, and make the powder reciprocally roll and slide along the radius of the heat conduction ring and the heat conduction disc during the downward flow of the powder, so that the travel path of the powder on the heat conduction assembly is optimized and prolonged, and the powder and the heat conduction assembly are fully contacted.

The embodiment of the invention provides a preparation method and application of a nickel potassium ferrocyanide template adsorbent. The method comprises the following steps: providing a cesium ferrocyanide solution; performing first mixing on the cesium ferrocyanide solution and a nickel source to obtain a cesium nickel ferrocyanide precursor; and carrying out second mixing on the cesium nickel ferrocyanide precursor and a potassium salt solution to obtain the potassium nickel ferrocyanide template adsorbent. The potassium nickel ferrocyanide template adsorbent prepared by the method disclosed by the invention has relatively good selective adsorption capacity on cesium ions in a cesium-containing solution, and is particularly suitable for adsorbing Cs < + > in a high-salt solution.

The application discloses a device for preparing potassium fluosilicate by using mixed acid and belongs to the technical field of potassium fluosilicate preparation, which comprises a fixing frame, the inner side of the fixing frame is provided with a reaction kettle shell, and the inside of the reaction kettle shell is provided with a stirring device; the top of the stirring device is fixedly connected with a gear one, the top sides of the reaction kettle shell are movably connected with a rotating shaft one, the top of the rotating shaft one is fixedly connected with a gear two, the bottom of the rotating shaft one is fixedly connected with a reciprocating screw rod, the outer side of the reciprocating screw rod is movably connected with a sliding plate, the inner side of the reaction kettle shell is fixedly connected with a sliding rod, the outer side of the sliding rod is movably connected with a sliding plate, the outer side surface of the sliding plate is provided with a groove, the inside of the groove is movably connected with a rotating shaft two, the outer side of the rotating shaft two is fixedly connected with a disturbance plate, and the bottom of the disturbance plate is fixedly connected with a flow guide fin. The application is used to solve the problem that the silicon powder is mixed with the mixed acid solution slowly in the early stage of reaction, thereby reducing the overall production efficiency.

The application belongs to the field of chemical detection and analysis, and particularly relates to a method for analyzing potassium hydroxide in a hydrazine boronic acid system, comprising the following steps: step 1, adding hydrogen peroxide to a sample for sample pretreatment; step 2, adding bromothymol blue indicator to the pretreated sample, titrating the pretreated sample with hydrochloric acid, and recording the volume of hydrochloric acid consumed by the sample; step 3, performing a blank test, and recording the volume of hydrochloric acid consumed by the blank test; step 4, calculating the concentration of KOH in the sample, denoted as a measured concentration; and step 5, calculating the difference of the measured concentration, and determining the concentration of KOH in the sample. The method can solve the interference of a weak acid and weak base system on the titration of potassium hydroxide, and can quickly and accurately analyze the concentration of potassium hydroxide in a potassium hydrazine boronic acid alkali solution by adding hydrogen peroxide for pretreatment and selecting bromothymol blue as an indicator.

This disclosure relates to compositions that help achieve or maintain a desired hydration status. In general, the compositions hydrate better than the equivalent volume of water or hydrate better than a larger volume of water. The compositions include a source of calcium, magnesium and potassium but lack sodium. The compositions of the disclosure are made with extremely pure water, preferably water made using reverse osmosis components.

The invention belongs to the technical field of solid beverages, and discloses a solid beverage containing magnesium and potassium and a preparation method thereof, the solid beverage comprises magnesium salt and potassium salt, and the mass ratio of K < + > to Mg < 2 + > is (2-5): 1; the potassium salt is potassium citrate; the magnesium salt is selected from at least one of magnesium oxide, magnesium gluconate, magnesium glycinate or magnesium citrate. Sylvite and magnesium salt are sieved and then added into purified water to be dissolved, and then spray drying is carried out; and carrying out subsequent packaging on the dried solid particles. The mass ratio of the main components K < + > to Mg < 2 + > of the magnesium-potassium solid beverage is (2: 1)-(5: 1), the two components in the ratio have a synergistic effect, the effect of improving sleep and constipation can be enhanced, and the effect is remarkably reduced when the ratio is not within the range.

The present invention relates to a solid NPK mineral fertilizer containing silicon and sulfur, the potassium and silicon being in the form of potassium silicate, the process for preparing said NPK mineral fertilizer, and its use. Figure to be published with the abstract: Fig. 1

The embodiment of the invention discloses a method for preparing potassium fluohafnate. The method comprises the following steps: S1, reacting hafnium tetrachloride with a fluorine source to obtain hafnium tetrafluoride; the fluorine source is potassium fluoride; and S2, reacting hafnium tetrafluoride with potassium fluoride to obtain potassium hafnium fluoride. According to the method disclosed by the embodiment of the invention, efficient synthesis of K2HfF6 is realized by optimizing reaction conditions and paths, the process flow is simple, the process conditions are easy to control, the product purity is high, no harmful gas escapes, and the method is suitable for industrial amplification and has a good application prospect in the field of industrial preparation of potassium fluohafnate.

The invention relates to the technical field of potassium adipate waste recycling, in particular to a comprehensive utilization method of potassium adipate waste. The invention provides a comprehensive utilization method of potassium adipate waste, which comprises the following steps: mixing the potassium adipate waste with water to obtain a potassium adipate solution; mixing the potassium adipate solution with phosphoric acid, carrying out double decomposition reaction, cooling to 5 DEG C in a first procedure, and carrying out first filtration to obtain adipic acid crystals and filtrate; and adding an anti-solvent into the filtrate, cooling to 5 DEG C in a second procedure, and filtering for the second time to obtain monopotassium phosphate crystals. According to the comprehensive utilization method, high-purity adipic acid can be obtained, and meanwhile monopotassium phosphate can be recycled.

The invention belongs to the technical field of fluosilicic acid utilization, and relates to a potassium fluosilicate decomposition method and application of the potassium fluosilicate decomposition method in preparation of hydrogen fluoride from fluosilicic acid. The method comprises the following steps: firstly, mixing an auxiliary agent with ammonia water, then mixing with potassium fluosilicate to form a decomposition system, adjusting the temperature of the decomposition system to 20-70 DEG C, stirring the decomposition system, simultaneously applying ultrasonic waves, and reacting for 5-10 hours to realize decomposition of potassium fluosilicate. In addition, solid potassium fluosilicate is obtained by adding soluble potassium salt into fluosilicic acid; the potassium fluosilicate is decomposed to obtain a fluoride salt solution, the fluoride salt solution is heated to expel ammonia and then reacts with fluosilicic acid to obtain an ammonium fluoride solution, the ammonium fluoride solution reacts with soluble calcium salt to obtain calcium fluoride solid, and the calcium fluoride solid reacts with concentrated sulfuric acid to obtain hydrogen fluoride. The potassium fluosilicate decomposition method can solve the problem that reaction raw materials are wrapped by reaction products, the raw material utilization rate and the product yield are remarkably improved, and the potassium fluosilicate decomposition method can shorten the technological process and reduce the production cost when applied to preparation of hydrogen fluoride from fluosilicic acid.