18 results about "Phosphate product" patented technology

The utility model discloses a device that improves food -grade phosphate product packing efficiency, aims at solving the problem of " bin explosion " and unqualified product processing when automatic packing line breaks down. The device is connected with automatic packing hopper and screw conveyer through guide pipe, and the material is conveyed to artificial packing hopper through scraper machine; guide pipe is equipped with switch structure, and the switch structure is driven by electric push rod to control the conduction of piston structure (including plugging ball), and the plugging ball top accommodating groove can reduce abrasion and guarantee sealing; control module adopts time relay and relay module, and realizes the timing extension and contraction of electric push rod. When automatic line breaks down, the device can quickly transfer material, avoid " bin explosion " and unqualified product, and reduce production interruption; when unqualified product is found, the device can be transferred into artificial bin for processing in time. Its simple and reliable structure, controllable cost, not only improves packing efficiency, but also guarantees the continuity of food additive packing link, and is favorable for enterprise benefit improvement.

The invention discloses a production method and a co-production method of a monoammonium phosphate production device, the production device comprises a first device and a second device, and the co-production method is characterized in that the first device and the second device are partially connected, so that the effect that the two devices are simultaneously matched for production is achieved. The method provided by the invention can break through the limitation of the processing capacity of the existing production equipment. The first device and the second device can separately produce monoammonium phosphate, after the first device and the second device are linked for production, part of slurry can be introduced into the second device for drying and other links, and the pressure of the first device is relieved, so that the production load is increased, and the yield is increased. Meanwhile, indexes such as the moisture content of the monoammonium phosphate can be optimized, the moisture of the monoammonium phosphate product is further reduced and is more stable through reasonable treatment of a drying link of the second device, and the stability and consistency of the quality of the monoammonium phosphate are improved.

The method for producing powdery high-concentration monoammonium phosphate by two-stage neutralization of high-impurity raffinate acid is as follows: the by-product raffinate acid generated in the production process of wet purified phosphoric acid is preheated to 65-75 DEG C, ammonia gas is first introduced to perform a first-stage neutralization reaction, the pre-stable impurity neutralization slurry is obtained after constant temperature ripening, ammonia gas is introduced to perform a second-stage neutralization reaction on the pre-stable impurity neutralization slurry, the qualified monoammonium phosphate slurry is obtained after constant temperature ripening, the qualified monoammonium phosphate slurry is continuously subjected to grading concentration, drying is performed after the slurry solid content is concentrated to 70-75%, and the powdery high-concentration monoammonium phosphate product is prepared. The present application takes the by-product high-impurity raffinate acid generated in the production process of wet purified phosphoric acid as the only phosphorus source, realizes full-value utilization of the raffinate acid, the process is green and environmentally friendly, and is suitable for industrialized continuous production.

The utility model relates to the technical field of inositol production, in particular to a production system for preparing magnesium dihydrogen phosphate by utilizing inositol hydrolysis residues, which comprises a hydrolysis residue storage tank, a discharge port of the hydrolysis residue storage tank is communicated with a smashing device, a discharge port of the smashing device is communicated with a reaction kettle, and a discharge port of the reaction kettle is communicated with a filtering device. A liquid outlet of the filtering device is communicated with a first buffer kettle, a discharge port of the first buffer kettle is communicated with a decolorizing kettle, a decolorizing liquid outlet of the decolorizing kettle is communicated with a second buffer kettle, a discharge port of the second buffer kettle is communicated with a crystallization kettle, a crystal outlet of the crystallization kettle is communicated with a drying device, and a discharge port of the drying device is communicated with a product storage tank. According to the production system with the structure, continuous operation can be realized, phosphate in the inositol hydrolysis residues can be recycled, resource waste is avoided, and a high-yield, high-yield and high-purity monopotassium phosphate product can be obtained.

The present application relates to waste resource utilization technical field, specifically to a method for preparing aluminum dihydrogen phosphate from municipal sludge gasification slag, wherein the gasification slag is first crushed and then subjected to acid leaching treatment, so that the phosphorus and aluminum in the gasification slag are partially in the form of ions into the solution, the obtained acid leaching solution is removed from Fe 3+ and other impurity ions through an activated carbon adsorption column, then the aluminum and phosphorus in the solution are precipitated and separated in the form of aluminum phosphate by adjusting the pH value, and finally the obtained aluminum phosphate precipitate is mixed with phosphoric acid at a certain ratio to synthesize aluminum dihydrogen phosphate under heating conditions. The method has simple process and mild conditions, effectively solves the disposal problem of municipal sludge gasification slag, realizes the high-value recovery of phosphorus and aluminum resources, and the prepared aluminum dihydrogen phosphate product has high purity, which has significant environmental and economic benefits.

This invention provides a method for preparing lithium iron phosphate from hydroxyferric phosphate and lithium iron phosphate electrode material. Ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution, and ammonia are added to the ferrous sulfate solution to form a mixed slurry. The mixed slurry is kept at room temperature for a period of time, then washed with water and filtered to form hydroxyferric phosphate precursors with different iron-phosphorus ratios. These precursors are then flash-dried and sintered at high temperature to obtain hydroxyferric phosphate precursors with different iron-phosphorus ratios and specific surface areas. The hydroxyferric phosphate precursors are pulverized and mixed to obtain the finished hydroxyferric phosphate product. High-iron-phosphorus ratio hydroxyferric phosphate and low-iron-phosphorus ratio hydroxyferric phosphate are mixed in a certain proportion and then formulated with lithium phosphate, lithium iron phosphate, and electrode material in a specific ratio, with the addition of a carbon source and additives to form a mixture. The mixture is then subjected to ball milling, sand milling, spray drying, sintering, pulverizing, sieving, batching, and packaging processes to obtain the finished lithium iron phosphate product.

The invention discloses a gas chromatography method for detecting the content of trioctyl phosphate products and impurities, and belongs to the technical field of organic chemical detection. The core of the method is that (trimethylsilyl) diazomethane (TMSCH2N2) is adopted as a derivatization reagent, and dioctyl phosphate (P204) in a sample is subjected to rapid and safe derivatization at room temperature; an optimized dichloromethane-hexane mixed solvent system is adopted for dilution, so that the solubility is remarkably improved, and the toxicity is reduced; a first-order heating rapid screening method (17min) is suitable for industrial quality control, a multi-order heating accurate quantification method (29min) is suitable for small-scale test process research and development, and trioctyl phosphate (TOP), P204, isooctyl alcohol, isooctyl ether and chloro-isooctane can be accurately quantified at the same time. The method solves the problems of high toxicity, low efficiency, narrow detection range, single mode and the like in the prior art, and has the remarkable advantages of safety, high efficiency, accuracy, environmental protection and wide adaptability.

The application provides a method for preparing lithium iron phosphate from iron hydroxyl phosphate and ferrous oxalate. The ferrous sulfate is purified to form a ferrous sulfate solution. Hydrogen peroxide, phosphoric acid, ammonium dihydrogen phosphate solution and ammonia water are sequentially added to the solution to form a mixed slurry. The mixed slurry is heated and kept warm, and then washed with water and filtered under pressure to form an iron hydroxyl phosphate precursor with different iron and phosphorus ratios. The iron hydroxyl phosphate precursor is dried by flash evaporation and sintered at high temperature and then crushed to obtain an iron hydroxyl phosphate precursor with different iron and phosphorus ratios and different specific surface areas. The iron hydroxyl phosphate precursor is crushed and mixed to obtain an iron hydroxyl phosphate product. The high-iron and low-iron ratio iron hydroxyl phosphate is mixed with ferrous oxalate, lithium phosphate, lithium carbonate and ammonium dihydrogen phosphate in a certain proportion, and a carbon source and an additive are added to form a mixture. The mixture is subjected to a series of processes such as ball milling, sand milling, spray drying, sintering, crushing, screening, batching and packaging to obtain a lithium iron phosphate product.

The present application relates to the technical field of immobilized enzyme production, and particularly relates to a phosphate waste liquid treatment process in immobilized enzyme production, which comprises the following steps: (1) the phosphate waste liquid enters a cation resin column and an anion resin column in sequence, and a second effluent is collected; (2) a potassium hydroxide solution elutes the anion resin column, and the collected desorption liquid is subjected to concentration, cooling, filtration and washing, and dipotassium hydrogen phosphate crystals and a first mother liquor are collected respectively; (3) a phosphoric acid solution elutes the cation resin column, and the collected desorption liquid is subjected to concentration and other operations, and dipotassium hydrogen phosphate crystals and a second mother liquor are collected respectively; (4) the first and second mother liquors are combined, and filtration, pH adjustment and other operations are performed to obtain a potassium dihydrogen phosphate product; and (5) the dipotassium hydrogen phosphate crystals are combined, water and a decoloring agent are added, and stirring and other operations are performed to obtain a dipotassium hydrogen phosphate product. The above treatment process can effectively treat the phosphate waste liquid in the immobilized enzyme production, and two products, the potassium dihydrogen phosphate and the dipotassium hydrogen phosphate, are obtained.

The application belongs to the field of biotechnology separation, and discloses a desalination method in the production process of sodium mannose phosphate, which comprises the following steps: centrifugal ultrafiltration is performed on the sodium mannose phosphate reaction solution obtained through enzyme catalysis reaction, so that the membrane-passing clear liquid is obtained; and the membrane-passing clear liquid is subjected to desalination through electrodialysis, so that the sodium mannose phosphate product is obtained. The method is suitable for the removal of phosphate, hypophosphite and other ions with small molecular weight, and the method is simple in operation, efficient in desalination and green in environmental protection.

This invention belongs to the field of biotechnology separation and discloses a purification method for crude sodium mannose phosphate. The method includes: centrifuging and ultrafiltration of the sodium mannose phosphate reaction solution obtained from a catalytic reaction to obtain a membrane-filtered supernatant; purifying the supernatant using a two-step electrodialysis method, repeating the purification 2-5 times to obtain an aqueous solution of sodium mannose phosphate; and then drying the solution to obtain a high-purity sodium mannose phosphate product. Different ion exchange membranes are used in the two-step electrodialysis method. This method, through electrodialysis, combines a homogeneous membrane and an alloy membrane to achieve effective separation of nonionic impurities such as mannose, as well as various phosphates, from sodium mannose phosphate.

This invention discloses a method for the resource-based treatment of chlorine- and COD-containing phosphoric acid waste liquid, comprising the following steps: (1) vacuum distillation: passing the phosphoric acid waste liquid into a vacuum distillation device for vacuum distillation treatment; (2) blending: adding water to the blending vessel for dilution treatment; (3) neutralization; (4) settling and stratification: the neutralized waste liquid is settling and stratified in an oil separator; (5) one-step impurity removal reaction and filtration; (6) two-step impurity removal reaction and filtration; (7) synthesis of dihydrate ferric phosphate; (8) water washing and aging; (9) drying and calcination. This invention, through multi-stage treatment, can efficiently remove high chloride ions and high COD from phosphoric acid waste liquid, with a removal rate of over 98%; at the same time, through further processing, a 30% hydrochloric acid solution product and a sodium phosphate solution are obtained, and after further reaction and treatment, a qualified anhydrous ferric phosphate product is obtained, enabling the waste to be recycled and reused. This invention has outstanding effects, simple process equipment, convenient operation, and is easy to apply in industrial production.

The invention discloses iron phosphate and a production method thereof, and belongs to the technical field of iron phosphate. The production method comprises the following steps: continuously introducing part of a raw material solution into a first reaction container with first bottom water, and carrying out a primary reaction to obtain a first reaction product; continuously introducing the first reaction product into a second reaction container with second bottom water, continuously adding the remaining raw material solution into the second reaction container for deep reaction to obtain a second reaction product, and carrying out solid-liquid separation; and when the raw material solution in a certain period is completely added, supplementing bottom water into each reaction container, and repeating the charging and reaction processes in the previous period to carry out continuous production. The method is simple in process and easy to operate, continuous production can be achieved, the production time is effectively shortened, an oxidizing agent and alkali liquor are not needed in the production process, use of chemical reagents is reduced, and generation and treatment of by-products are avoided. The iron phosphate product obtained by the method is controllable in particle size and meets the battery grade standard.

This application relates to the field of phosphoric acid preparation technology, and more particularly to a method for preparing industrial-grade phosphoric acid based on hydrochloric acid decomposition of phosphate rock. The method includes: pulping phosphate rock to obtain a phosphate rock slurry; acidifying the phosphate rock slurry with hydrochloric acid to obtain an acid-hydrolyzed slurry; filtering the acid-hydrolyzed slurry to obtain an intermediate filter material; extracting the intermediate filter material using a composite extractant to obtain calcium chloride product and a supported organic phase; and reverse-extracting the supported organic phase with water to obtain dicalcium phosphate product and industrial-grade phosphoric acid. The extraction is performed in a rotary microchannel device. The composite extractant comprises a mixed organic phase of trioctylamine, tributyl phosphate, and triethylamine in decreasing mass concentrations. This method, through the synergistic effect of multi-stage gradient impurity removal throughout the entire process and deep purification by a core innovative unit, improves the purity and yield of phosphoric acid produced by wet acid hydrolysis from three dimensions: pre-removal of impurities at the source, selective separation of core soluble impurities, and precise interception of trace impurities at the terminal stage, while achieving full recovery of phosphate rock.

The invention discloses a system and a method for producing granular monoammonium phosphate by a neutralization slurry concentration method, and the system and the method adopt a pre-neutralization and sedimentation process to remove part of impurities and improve the product grade; when the method is used for producing granular monoammonium phosphate, the production cost is saved, the energy consumption is reduced, and good economic benefits are achieved. In the production process, part of filtered dilute phosphoric acid from a wet-process phosphoric acid device enters a pre-neutralization reaction tank to be subjected to a pre-neutralization reaction with gas ammonia, monoammonium phosphate slurry obtained through pre-neutralization is fed into a settling tank to be subjected to settling separation, and supernatant liquid obtained after settling is fed into an outer circulation neutralization reactor to be subjected to a further neutralization reaction with the gas ammonia; and carrying out double-effect concentration on the obtained monoammonium phosphate slurry. And granulating the concentrated slurry in a spraying granulation dryer, drying, screening, crushing and cooling the material, and sending the material to a product process to prepare a granular monoammonium phosphate product.

The application discloses a production method of expanded potassium dihydrogen phosphate, relates to the technical field of potassium dihydrogen phosphate production, and uses a production process of "neutralization-spray drying-secondary drying" to process, under the premise that energy consumption is controllable, produces expanded potassium dihydrogen phosphate products which can be quickly and completely dissolved in water, the water-soluble solution is clear, nozzles are not blocked, and the spraying efficiency is improved, through controlling the drying temperature, the generation of by-products (potassium polyphosphate) can be effectively prevented, therefore, the application has the advantages of simple production process, short process, suitability for large-scale use, green environmental protection, stable product quality, and the like, in addition, the obtained product is completely dissolved in water, has high clarity, is beneficial to spraying or unmanned aerial vehicle flying seeding, and thus the application efficiency is greatly improved.

This application provides a wastewater phosphorus high-value recovery device and its operation method, belonging to the field of wastewater treatment and resource recovery technology. The wastewater phosphorus high-value recovery device includes: a membrane separation unit for solid-liquid separation and phosphate concentration of phosphorus-containing wastewater; a crystallization unit including a crystallization tank group, a dosing module, a detection module, and a control console, wherein the dosing module is connected to the crystallization tank group, the detection module is located within the crystallization tank group, and the control console is electrically connected to both the dosing module and the detection module; the crystallization unit is used for graded crystallization of the phosphorus-containing wastewater treated by the membrane separation unit to recover phosphate crystals; and a high-value preparation unit including a grinding module, a drying module, and a calcination module connected in sequence, used to prepare the recovered phosphate crystals into phosphate products.

The utility model discloses a cover closing device for a phosphate product box, which belongs to the technical field of packaging equipment and comprises a feeding mechanism, a feeding mechanism connected with the feeding mechanism, a cover closing mechanism, a cover pressing mechanism and a pushing mechanism, and the cover closing mechanism, the cover pressing mechanism and the pushing mechanism are arranged according to feeding procedures of the feeding mechanism. The cover closing mechanism comprises a second conveying belt, a second power assembly, a rotating cylinder connected with the second power assembly, a first telescopic air cylinder arranged in the rotating cylinder, a supporting arm connected with the output end of the first telescopic air cylinder and a suction cup arranged on the supporting arm. The second conveying belt is used for conveying packaging covers into the cover closing mechanism; the first telescopic air cylinder is matched with the supporting arm and the suction cup and used for achieving the cover closing process of the packaging cover and the packaging box. The feeding mechanism drives the packaging box to sequentially pass through the cover closing mechanism, the cover pressing mechanism and the pushing mechanism, and the automatic cover closing process of the phosphate product box is achieved through the procedures of cover closing, cover pressing and pushing of the packaging box.