13results about "Silicon halogen compounds" patented technology

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.

This invention relates to heterovalent substituted argyrodite-type solid electrolytes. These solid electrolytes exhibit increased ionic conductivity.

This application relates to phosphor materials for light sources and methods for manufacturing the same. One method includes: mixing a first fluoride phosphor powder doped with tetravalent manganese with a processing solution for a specified time period; stopping the mixing to allow the fluoride phosphor powder to settle; removing at least some liquid that has separated from the first fluoride phosphor powder; repeating the steps of (a) mixing, (b) stopping the mixing, and (c) removing at least some of the liquid during one or more additional cycles; and obtaining a second fluoride phosphor powder after repeating the steps of mixing, stopping the mixing, and removing at least some of the liquid. The second fluoride phosphor powder contains a reduced amount of manganese compared to the first fluoride phosphor powder.

Provided is an automatic method for producing a fluorine-containing crystalline product from a hydrofluoric acid solution, comprising: sensing the concentration of the hydrofluoric acid solution, and presetting a feeding flow rate; outputting a predetermined flow rate of the reaction solution by an automatic control module based on the concentration and the flow rate of the hydrofluoric acid solution and the concentration of the reaction solution; feeding the reaction solution and the hydrofluoric acid solution into the reaction area; sensing the in-situ fluoride ion concentration of the solution in the reaction area in real time, and controlling the feeding flow rate of the reaction solution in real time by the automatic control module; sensing the precipitation height of the fluorine-containing crystals in real time, and controlling whether to discharge the fluorine-containing crystals by the automatic control module. The method can be used to easily treat the hydrofluoric acid solution with a high concentration, accordingly obtaining sodium fluoroaluminate crystalline products or sodium fluorosilicate crystalline products with sand-like shape, low moisture content, and high sodium-to-aluminum ratio.

This invention discloses a method for using circulating water from a wet-process phosphoric acid concentration system to improve the yield of fluorosilicic acid. The method includes the following steps: First, circulating water from a 58% ω(P₂O₅) concentrated phosphoric acid production system is pumped into a cooling system; the cooled circulating water is then pumped into the first and second fluorine absorption tanks of a 48% ω(P₂O₅) concentrated phosphoric acid production system. Second, the circulating water from the 48% ω(P₂O₅) concentrated phosphoric acid production system is used as makeup water for the 58% ω(P₂O₅) concentrated phosphoric acid production system. Finally, process water is pumped into the 48% ω(P₂O₅) concentrated phosphoric acid production system to replenish the water level. The method provided by this invention can effectively recover fluorine resources from the circulating water in the concentration system, improve the yield of fluorosilicic acid, reduce silica gel deposition in the 48% ω(P₂O₅) concentrated phosphoric acid production system, reduce cleaning workload, and continuously refresh the circulating water to reduce the corrosion rate of equipment and pipelines by HF. Furthermore, it can reduce the amount of circulating water discharged and the amount of calcium hydroxide used.

The application discloses a method for removing fluorine from white fertilizer by dry method and preparing fluorosilicic acid, which comprises the following steps: adding dried white fertilizer into a reaction container, mixing the white fertilizer with silicon powder and sulfuric acid under stirring, wherein the mixing ratio is that the molar ratio of SiO2 / F is 0.3-0.8 and the molar ratio of H2SO4 / F is 1-4; then conveying the mixed material to a calcining furnace for calcination; introducing fluorine-containing gas discharged from the calcining into a fluorosilicic acid preparation system, and obtaining fluorosilicic acid products with a purity of greater than or equal to 12 % through two-stage spray absorption; and continuing to use the fluorine-removing calcined slag as white fertilizer. The application can significantly improve the fluorine resource utilization rate and reduce resource waste; meanwhile, by adding sulfuric acid which has the dual functions of raw material and catalyst, the reaction temperature is effectively reduced, the energy consumption and equipment cost are reduced, and the reaction efficiency and process economy are further improved.

An automated production method is provided for producing fluorine-containing crystalline products using a hydrofluoric acid solution. [Solution] The method comprises sensing the concentration of the hydrofluoric acid solution and pre-setting the supply flow rate; an automatic control module outputting a predetermined flow rate of the reaction solution based on the concentration and flow rate of the hydrofluoric acid solution and the concentration of the reaction solution; supplying the reaction solution and the hydrofluoric acid solution to the reaction zone; sensing the fluoride ion concentration of the solution in the reaction zone in real time and controlling the supply flow rate of the reaction solution in real time by the automatic control module; and sensing the precipitation height of the fluorine-containing crystals in real time and controlling whether or not to discharge the fluorine-containing crystals by the automatic control module. The present invention makes it possible to obtain granular sodium fluoroaluminate crystals or sodium fluorosilicate crystals with low water content and high Na / Al molecular ratio by processing a high-concentration hydrofluoric acid solution in a simple manner.

The present application relates to fluorosilicic acid impurity removal technical field, disclose a kind of removal method of phosphorus in fluorosilicic acid, precipitant is added in fluorosilicic acid, so that phosphate in fluorosilicic acid is reacted with precipitant and precipitate is precipitated, then filtration separation is carried out, to obtain first precipitate and first solution, remove phosphate in fluorosilicic acid;The precipitant is at least one of soluble zirconium salt or soluble titanium salt.The method of the present application uses soluble zirconium salt or soluble titanium salt as the precipitant of phosphate, and the impurity removal process is simple and easy to operate;The method of the present application separates phosphoric acid in a strong acidic environment, and the precipitate obtained after phosphorus removal can be used as a precipitant again after treatment, achieving the effect of recycling the precipitant.

The present application provides an automatic production method for producing fluorine-containing crystalline product by using hydrofluoric acid solution, which comprises: sensing the concentration of the hydrofluoric acid solution and presetting the feeding flow rate; an automatic control module outputting the predetermined flow rate of the reaction solution according to the concentration of the hydrofluoric acid solution and the flow rate and the concentration of the reaction solution; feeding the reaction solution and the hydrofluoric acid solution into a reaction zone; instantaneously sensing the fluorine ion concentration of the solution in the reaction zone, and the automatic control module instantaneously controlling the feeding flow rate of the reaction solution; instantaneously sensing the settling height of the fluorine-containing crystalline product, and the automatic control module controlling whether to discharge the fluorine-containing crystalline product. The present application can process high-concentration hydrofluoric acid solution in a simple way, and thus obtain sand-like, low-moisture, high-sodium / aluminum molecular ratio sodium fluoroaluminate crystalline product or sodium fluorosilicate crystalline product.

A fluoride phosphor containing: manganese; fluorine; an element M including at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements; and at least one selected from the group consisting of an alkali metal and an ammonium ion. When the total number of moles of the alkali metal and the ammonium ion is 2, the number of moles of the manganese is greater than 0 and less than 0.2, the total number of moles of the element M is greater than 0.8 and less than 1, and the number of moles of the fluorine is greater than 5 and less than 7. The fluoride phosphor has a particle diameter ratio (Da / Dm) that is 0.85 or greater, where Da is a mean particle diameter measured by a FSSS method, and Dm is a volume median diameter measured by a laser diffraction particle size distribution measurement method.

The application relates to the technical field of lead electrolytic refining, and particularly discloses a method for removing bismuth from a lead fluosilicate electrolyte, which comprises the following steps: stirring and heating the lead fluosilicate electrolyte to 35-45 DEG C, adding a mixture of polysulfur oxysalt and a reducing agent, stirring and heating to 45-65 DEG C, reacting for 1-4.5 hours, and removing the precipitate after the reaction to obtain the filtrate, which is the lead fluosilicate electrolyte from which the bismuth is removed. The method for removing bismuth from the lead fluosilicate electrolyte can effectively remove the bismuth without losing lead, the removal rate of bismuth ions reaches more than 70%, and can reach more than 99% at the highest, metal ions which affect the purity of the electrolytic lead are not introduced, the method is simple and easy to operate, and the cost is low.

The invention provides an automatic production system for producing a fluorine-containing crystallization product by using a hydrofluoric acid solution, which comprises a crystallization treatment device, a first feeding module, a second feeding module, a crystal substance treatment module and an automatic control module, the automatic control module is electrically connected with the fluorine ion concentration sensing meter, the optical fiber sensing meter, a first pump of the first feeding module, a second pump of the second feeding module and a discharging pump of the crystal substance processing module, receives fluorine ion concentration parameters sensed by the fluorine ion concentration sensing meter and controls the first pump or the second pump. And the automatic control module is used for receiving a sensing result of the optical fiber sensing meter and controlling the opening and closing of the discharging pump. Therefore, the fluorine ion concentration of the crystallization reaction can be automatically controlled, so that the reaction and the process for producing the fluorine-containing crystallization product are simplified.

This invention relates to heterovalent substituted argyrodite-type solid electrolytes. These solid electrolytes exhibit increased ionic conductivity.