430 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 brine type potassic salt ore detection method based on a comprehensive geophysical technology, and relates to the field of geophysical detection and strategic mineral resources, the method comprises the following steps: adopting an audio magnetotelluric sounding technology to obtain audio magnetotelluric sounding data; determining a stratum resistivity profile of the audio magnetotelluric sounding line according to the audio magnetotelluric sounding data; acquiring shallow seismic exploration data of the same survey line by adopting a shallow seismic exploration technology; determining a seismic stack section according to the shallow seismic exploration data; the stratum resistivity profile and the seismic stack profile are combined to jointly reveal the stratum structure and construction characteristics of the research area; based on the stratum structure and construction characteristics, according to the low resistance abnormity of the stratum resistivity profile and the strong reflection event characteristics of the seismic stack profile, the sylvite mineralization favorable area and the brine reservoir interval are comprehensively detected, and the brine type sylvite ore identification precision can be improved.

The production device comprises a base, a reaction barrel is fixedly arranged on the base, a mounting frame is fixedly arranged on the outer side of the reaction barrel, a motor is fixedly connected to the top end of the mounting frame, and a stirring device for stirring basic zirconium sulfate and tartaric acid is arranged in the reaction barrel. The feeding parts are sequentially added into the reaction barrel, and a discharging part for discharging reacted liquid is arranged in the reaction barrel; through the staggered and periodic coincidence design of discharging grooves of the inner barrel and the outer barrel in the feeding part, the rotating rod is matched to drive the outer barrel to spirally move downwards, accurate and quantitative adding of the basic zirconium sulfate solution is achieved, meanwhile, the adding time and flow of the tartaric acid solution are automatically controlled through magnetic ring adsorption of the upper barrel and the outer barrel and stored energy release of the first spring, and the feeding efficiency is improved. Manual intervention is reduced, efficiency loss caused by step-by-step feeding is avoided, and the preparation efficiency of the water repellent agent is remarkably improved.

The present invention relates to the technical field of mineral flotation, and in particular to a soft potassium magnesium alum flotation composite reagent and its application. The present invention provides a soft potassium magnesium alum flotation composite reagent, comprising a collector and a frother; the collector comprises R-C6H4NaO3S; R is an alkyl group. The soft potassium magnesium alum flotation composite reagent of the present invention has stronger adsorption selectivity and collection capacity. Under the same dosage, the soft potassium magnesium alum flotation composite reagent has a higher recovery rate and grade of the soft potassium magnesium alum concentrate obtained by flotation, thereby significantly improving the flotation separation efficiency of the soft potassium magnesium alum.

The invention provides a method for removing trace impurity elements from high-purity rubidium salt, which belongs to the technical field of metallurgy and comprises the following steps: dissolving the high-purity rubidium salt with deionized water to obtain a high-purity rubidium salt solution; adding a precipitator into the high-purity rubidium salt solution to carry out selective precipitation reaction of rubidium to obtain a rubidium-containing precipitation product, and preliminarily removing impurity elements such as sodium, potassium and cesium; the rubidium-containing precipitation product is filtered and then subjected to roasting treatment, the rubidium-containing precipitation product is subjected to a decomposition reaction, and a roasted product is obtained; an acidic transformation agent is added into the roasted product for a transformation reaction, and a rubidium salt solution is obtained; impurity elements such as sodium, potassium and cesium in the product are further removed through a recrystallization refining method, and the rubidium salt product with the purity reaching 99.9% or above is obtained. The method can effectively remove trace impurity elements in the high-purity rubidium salt, and has the advantages of short flow, few procedures and high product purity.

The invention discloses a copper-titanium etching solution and a preparation method thereof, and belongs to the technical field of etching solution preparation. The etching solution is prepared from the following components in percentage by mass: 4.5-7.5% of potassium peroxymonosulfate composite salt, 1.2-2.8% of sodium percarbonate, 1.2-2.8% of benzotriazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3, 4-triazole-2, 3- The cleaning agent is prepared from the following components in percentage by weight: 1.2%-1.8% of 1, 3-dicarboxylic acid, 0.3%-0.8% of 5-aminotetrazole, 0.15%-0.45% of ethylenediamine tetraacetic acid tetrasodium salt, 0.15%-0.45% of hydroxyethylidene diphosphonic acid, 0.15%-0.45% of cocamidopropyl betaine, 0.3%-0.8% of benzotriazole, 0.15%-0.45% of 2-mercaptobenzothiazole, 0.02%-0.08% of poly-N-isopropylacrylamide, 0.7%-1.8% of potassium perchlorate and the balance of ultrapure water. According to the etching solution, the copper-titanium etching rate can be accurately regulated and controlled, back cutting and titanium residues are effectively inhibited, the stability of the etching solution is improved, and the service life of the etching solution is prolonged.

The invention relates to a method for determining potassium by using a nano-enzyme-based colorimetric probe, and the probe and application thereof. The invention relates to a method for determining potassium by using a nano-enzyme-based colorimetric probe, which comprises the following steps of: synthesizing copper and cerium-containing phosphotungstic acid nano-enzyme by using phosphotungstic acid, cerous nitrate and copper chloride as precursors through a hydrothermal method, detecting the absorbance of K < + > standard solutions with different concentrations by using the copper and cerium-containing phosphotungstic acid nano-enzyme as a probe, establishing a quantitative relation between the absorbance and the K < + > concentration, drawing a standard curve, obtaining a regression equation, and determining the potassium content by using the regression equation. And detecting the absorbance of the sample determination standard solutions with different concentrations, and obtaining the K < + > content of the sample through the regression equation. According to the method, the nano-enzyme (Cu, Ce-PWs) is prepared by using tungsten-molybdenum heteropoly acid with high negative charges, unique chelating properties and various structures and Ce < 4 + > and Cu < 2 + > as raw materials, strong mimic enzyme laccase activity is generated through the synergistic effect of Ce atoms and Cu atoms, and the activity of the mimic enzyme laccase is further improved in the presence of H2O2.

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%.

A method for purifying sylvite from biomass ash comprises the following steps: 1) acid leaching: mixing the biomass ash with an acid solution, stirring, and carrying out solid-liquid separation to obtain potassium-containing acid leaching liquid and leached ash; 2) impurity removal: adding alkali into the potassium-containing pickle liquor to adjust the pH value to 11-13, adding sodium carbonate, stirring, and carrying out solid-liquid separation to obtain a potassium-containing solution and a metal precipitate; 3) concentration: concentrating the potassium-containing solution; 4) evaporative crystallization: performing evaporative crystallization on the concentrated potassium-containing solution to obtain potassium salt and a residual sodium-containing solution; 5) drying: drying the potassium salt to obtain a potassium salt product; and bipolar membrane electrodialysis: introducing the residual sodium-containing solution into a bipolar membrane electrodialysis device for bipolar membrane electrodialysis treatment, recycling the obtained acid solution to the step 1), and recycling the obtained alkali to the step 2). According to the method, high-purity sylvite can be obtained, the product value is high, the process is simple, the cost is low, and cyclic utilization of water resources is realized.

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 discloses a preparation method and a use method of a potassium-based porous geopolymer soil acidity improver, and belongs to the technical field of soil improvement. The preparation method comprises the following steps: uniformly stirring and dispersing an exciting agent, powder with exciting activity, solid waste and water to form slurry; adding a foaming agent into the slurry, uniformly mixing, pouring into a mold, and curing in a drying oven; and after the slurry is solidified, taking out, demolding, grinding and screening to obtain the potassium-based porous geopolymer soil acidity modifier. According to the invention, an innovative mode of treating wastes with wastes is realized by using geopolymers, and a synergistic solution is provided for acid soil improvement and solid waste recycling.

The invention belongs to the technical field of chemical product preparation, and provides a production method of instant expanded monopotassium phosphate. The method comprises the following steps: (1) neutralization: neutralizing a potassium hydroxide solution and a phosphoric acid solution to prepare monopotassium phosphate slurry; (2) spray drying: performing sectional drying on the monopotassium phosphate slurry in a vertical high-tower spray drying tower, wherein the vertical high-tower spray drying tower is set into a top high-temperature section, a middle shaping section and a bottom cooling section according to the length ratio from top to bottom, and high-temperature hot air is arranged at an inlet of the top high-temperature section; low-temperature hot air is supplemented into the joint of the middle shaping section and the top high-temperature section; separating, dedusting and recycling at an outlet of the bottom cooling section to obtain monopotassium phosphate primary product particles; and (3) cooling and screening to obtain a finished product. According to the production method, low-energy-consumption and high-efficiency production is realized through sectional type high tower spray drying, and the instant puffed monopotassium phosphate product with high puffing rate and high stability can be obtained.

The invention provides a method for extracting potassium, sodium, rubidium and cesium in lithium slag, which comprises the following steps: S1, carrying out first mixing on the lithium slag and a leaching agent to obtain a mixture; the leaching agent comprises Mg (OH) 2 and CaO; s2, mechanically activating the mixture to obtain a pretreated material; the mechanical activation comprises the following steps: carrying out ball milling on the mixture; s3, carrying out second mixing on the pretreated material and water to obtain a first reaction solution; the second mixing is carried out at the temperature of 40-70 DEG C; s4, performing hydrothermal treatment on the mixed solution to obtain a second reaction solution; the temperature of the hydrothermal treatment is 120-170 DEG C; s5, the second reaction liquid is subjected to solid-liquid separation, and a metal extracting solution and tailings are obtained; the metal extracting solution contains a potassium element, a sodium element, a rubidium element and a cesium element. According to the method, efficient extraction of potassium, sodium, rubidium and cesium in the lithium slag can be achieved at the low hydrothermal temperature.

The invention discloses a potassium-rich liquid decalcification method based on a titanate ion sieve, and relates to the technical field of high-salinity water body ion removal, and the removal method comprises the following steps: adding the titanate ion sieve into a potassium-rich liquid water body as an adsorbent under a constant temperature condition, oscillating the potassium-rich liquid added with the adsorbent for a certain period of time, and removing calcium ions in the potassium-rich liquid; calcium ions in a potassium-rich liquid system can be remarkably removed, and then the titanate ion sieve is put into a NaCl solution for elution, so that elution of the calcium ions in the titanate ion sieve is realized. By constructing an efficient decalcification system, efficient removal of calcium ions in the potassium-rich liquid is achieved, meanwhile, cyclic utilization of ionic titanate is achieved, high adsorption capacity can still be kept in multiple cyclic adsorption-desorption cycles, the economic benefits of potassium salt extraction are improved, and the method can meet the actual requirements of industrial production.

In order to solve the problem of recovery of a byproduct boric acid in the phenylboronic acid production process, boric acid solids are converted into a fluoboric acid solution, a potassium fluoborate product is prepared through desilicication purification, potassium fluoborate precipitation and impurity removal, and various indexes of potassium fluoborate meet the quality requirements of industrial first-grade products GB / T 22667-2008. According to the technical scheme, boron resources can be effectively recycled, and environmental pollution is reduced; the product raw material cost in the potassium fluoborate industry is reduced; the economic benefit and the environmental benefit are remarkable.

Disclosed are methods and systems for capturing carbon dioxide and utilizing calcium sulfate to generate useful products.

A system for producing hydrogen gas by reacting a metal selected from a group consisting of aluminum, magnesium, calcium, lithium, potassium and sodium and water, comprises a reaction chamber, a water supply device, configured for supplying water to the reaction chamber, a metal supply device, configured for supplying metal to the reaction chamber, a hydrogen collection arrangement, configured for collecting hydrogen gas from the reaction chamber and supplying said hydrogen gas via a main output channel to an application hydrogen consumer, and a controller, configured to control at least one of the water supply device, the metal supply device and the hydrogen collection arrangement. The disclosure provides a system and methods for producing hydrogen gas by reacting metal and water. The disclosure further provides a vehicle comprising said system and a portable device comprising said system.

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 potassium iodide preparation, in particular to a cyclic preparation method which comprises the following steps: in an oxidation-reduction reaction system containing elemental iodine, potassium hydroxide and potassium formate, carrying out an oxidation-reduction reaction at a first temperature to obtain an oxidation-reduction reaction solution; adding a precipitant, carrying out precipitation reaction at a second temperature, and carrying out solid-liquid separation on the obtained reaction liquid to obtain a potassium iodide solution; carrying out evaporation concentration, cooling crystallization and solid-liquid separation on the potassium iodide solution to respectively obtain potassium iodide crystals and potassium iodide mother liquor, and adding the potassium iodide mother liquor into a redox reaction system; according to the mode, the potassium iodide is formed by adopting an oxidation reduction mode, the potassium iodide can be obtained by carrying out one-time reaction in one reaction system, then impurities are removed by utilizing the precipitant, only solid impurities and a solvent evaporated in the evaporation and concentration step leave the reaction system in the whole reaction process, and the cyclic utilization of raw materials is realized; the utilization rate of raw materials is improved.

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.

A method for preparing titanium dioxide that includes the steps of providing at least one titanium precursor: providing one or more potassium precursors: mixing the at least one titanium precursor with the one or more potassium precursors to form a mixture: wherein the mixture has a potassium to titanium (K / Ti) molar ratio of 2.0 / 4.0<K / Ti<2.0 / 2.4; sintering the mixture at a temperature in the range of 750° C. to 900° C. for a predetermined time to form a powder: soaking the heated powder in an acidic solution: collecting and drying the acid-soaked powder: and treating the collected powder thermally at a temperature in the range of 300° C. to 500° C. for a predetermined time to form the TiO2. The titanium oxide formed has a monoclinic crystal structure. TiO2(B), as its major crystal phase with a mass percentage that is >50% of the overall mas of the TiO2.

The purpose of the present invention is to provide at least one of a zeolite-containing molded body and a potassium adsorption method using the molded body, said molded body being capable of suppressing aluminum elution and removing potassium from a dialysis waste liquid compared to conventional dialysis waste liquid treatment using zeolite.

The present invention provides a DIDNTB alkali metal salt, a preparation method and an application thereof, belonging to the technical field of DIDNTB salt formation. The DIDNTB alkali metal salt described in the present invention is a DIDNTB lithium salt, a DIDNTB sodium salt and a DIDNTB potassium salt. The preparation method of the present invention is as follows: Mix DIDNTB and an alkali metal salt in a solvent for a salt formation reaction to obtain a crude DIDNTB alkali metal salt; Mix the crude DIDNTB alkali metal salt with a solvent for recrystallization to obtain the DIDNTB alkali metal salt. The DIDNTB alkali metal salt obtained in the present invention overcomes the deficiency of poor water solubility of the existing DIDNTB, and the preparation process method is simple, the conditions are mild, the product purity is high, the yield is high, the cost is low, and it can be mass-produced, which is beneficial to further application in detection reagents.

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.