11 results about "Potassium product" patented technology

The utility model discloses a kind of for gold cyanide potassium processing's belt dryer, it is related to drying technical field, including conveyer belt and drying box body, the conveyer belt is overlapped on drying box body, the air inlet is opened in conveyer belt inner wall, the baffle is rotatably connected in conveyer belt inner wall, the baffle and conveyer belt inner wall junction is located below air inlet, one end of the baffle is connected with second sliding block;The utility model passes through conveyer belt and sends gold cyanide potassium into drying box body, and the direction of air entering outside box is changed using inclined baffle, so that it is obliquely contacted with conveyer belt, effectively balance the air pressure of conveyer belt lower end, ensure that air can be more balancedly passed through gold cyanide potassium to be dried, the design improves the uniformity of drying effect, avoid the problem of local drying deficiency or excessive drying caused by airflow uneven, to ensure the drying quality of gold cyanide potassium product.

A method for the resource utilization of potassium chloride and potassium fluoride mixed salts, byproducts of polyfluorinated nitrobenzene (PFN) reactions, belongs to the field of resource utilization of potassium salts byproducts of fluorination reactions. The method is characterized by the following preparation steps: 1) removing organic pollutants from the mixed salts through heat treatment to obtain inorganic mixed salts; 2) dissolving the inorganic mixed salts in a solvent to obtain an inorganic mixed salt solution, evaporating and concentrating the solution, cooling and crystallizing, and filtering to separate primary potassium chloride solid and a mixed filtrate; 3) adding a defluorinating agent to the mixed filtrate to obtain precipitated sodium fluoride product and potassium chloride solution; 4) preparing a potassium chloride solution by dissolving the primary potassium chloride solid in distilled water and performing bipolar membrane electrodialysis to obtain a dilute KOH solution; 5) concentrating the KOH solution and then introducing HF gas to prepare potassium fluoride. This invention obtains sodium fluoride, potassium fluoride, and potassium chloride products through salt separation technology and bipolar membrane electrodialysis technology, realizing the separation, purification, and recycling of potassium and fluorine resources.

The invention discloses a potassium sulfate preparation method, and relates to the field of potassium sulfate preparation. Comprising the following steps: raw material preparation and pretreatment: preparing sodium sulfate, potassium chloride and process water; converting, mixing sodium sulfate, potassium chloride and process water for reaction, centrifugally separating and drying after reaction to obtain a solid finished product, packaging and warehousing; salt evaporation: carrying out centrifugal separation on the converted and separated clear liquid, then evaporating to prepare salt, drying after evaporation to obtain a byproduct, packaging and warehousing. The potassium sulfate product is prepared through a two-step conversion method and a single-group or multi-group parallel MVR evaporation technology, the byproduct sodium chloride, the potassium conversion rate and the potassium oxide content of the potassium sulfate are high, the product potassium sulfate can be directly used as a drip irrigation fertilizer, meanwhile, hazardous chemical raw materials and products are not generated, hazardous chemical gas and hazardous chemical solid waste are not generated in the production process, and the method is suitable for industrial production. The method has the advantages of safety, environmental protection, energy conservation and no emission of three wastes.

The present application relates to yellow phosphorus chemical technology field, specifically to a kind of yellow phosphorus tail gas heat carrier concentrated potassium formate solution preparation solid potassium formate process, first potassium formate solution is sent into heating pot, then yellow phosphorus tail gas is used as fuel to heat organic heat carrier, and high-temperature heat carrier is transported to the coil in heating pot by closed circuit circulation mode, and the solution is indirectly heated and concentrated;Concentrated liquid is transported to the surface of rotary cooling drum again, and is cooled and crystallized at the surface temperature of 20 DEG C-50 DEG C, forms the crystalline layer of predetermined thickness, finally is scraped down by scraper device, and solid potassium formate product is obtained.By using yellow phosphorus tail gas as heat source, waste is treated with waste and energy recovery is realized;Through organic heat carrier closed circuit circulation and accurate temperature control, the problems of high energy consumption and high cost of traditional electric heating process are solved, and the inconvenience of traditional water agent product storage and transportation is effectively overcome.

The invention relates to a potassium tetracyanopalladate synthesis method, which comprises: S1, acid dissolution oxidation: carrying out a dissolution reaction on a metal palladium powder raw material to generate a palladium nitrate-containing aqueous phase solution; s2, precipitation: carrying out precipitation reaction on the aqueous phase solution containing palladium nitrate prepared in the step S1 to generate a palladium cyanide solid intermediate; s3, washing: washing the palladium cyanide solid intermediate generated in the step S2 to remove impurity ions; and S4, reactive crystallization: reacting the palladium cyanide intermediate purified in the step S3 with potassium cyanide, and crystallizing to obtain a potassium tetracyanopalladate product. According to the method, synthesis of potassium tetracyanopalladate can be achieved through a simple and rapid method, and the obtained product is high in purity, uniform in crystal form, good in solubility and suitable for application scenes with high requirements for plating quality in the industries of semiconductors, PCBs, aerospace and the like; the potassium tetracyanopalladate is used as a key raw material of a palladium plating process and is used in the field with high requirements on material performance and appearance.

The invention discloses a low-potassium lettuce capable of quantitatively controlling the potassium content and a cultivation method and system thereof, and the method comprises the steps: preparing conventional potassium-containing and potassium-free high-power concentrated mother liquor, diluting the mother liquor in proportion, and continuously supplying a potassium-containing nutrient solution in the early stage of plant growth; when the fresh weight of the whole plant reaches a potassium cut-off threshold value calculated by the potassium content of the target fresh sample, the potassium content of the conventional lettuce and the fresh weight of the overground part, accurately switching to a potassium-free nutrient solution until harvesting; meanwhile, in the potassium-free stage, equimolar sodium salt / calcium salt is used for replacing sylvite to maintain conductivity and ion balance, and fine regulation and control of EC of 1.3-1.5 mS / cm and pH of 5.5-6.5 are matched, so that root system health and yield quality are ensured. The system does not need a special light source or a temperature control facility, is suitable for deep liquid flow, shallow liquid flow and aeroponic cultivation of multiple soilless platform lettuce production, stably realizes 100 + / -10mg / 100g (fresh sample) low-potassium products among batches, and has the advantages of simplicity and convenience in operation, high repeatability and high industrial popularization value.

This invention relates to a method for preparing industrial-grade potassium dihydrogen phosphate using a metathesis extraction method, belonging to the technical field of fine chemicals. This invention utilizes phosphate, potassium salt, and sulfuric acid raw materials to produce potassium dihydrogen phosphate through a metathesis and extraction process. In the process of this invention, the generated potassium dihydrogen phosphate dissolves in the aqueous phase, while the generated calcium sulfate dihydrate precipitates; these two can be separated using a simple solid-liquid separation method. The small amount of hydrochloric acid contained in the filtrate can be separated by extraction, yielding high-quality industrial-grade potassium dihydrogen phosphate while simultaneously producing ammonium chloride as a byproduct. The preparation method of this invention has advantages in terms of cost and product quality, the process is easy to implement, and the extractant can be recovered and reused.

A kind of low potassium content of quantitative control of potassium content and its cultivation method and cultivation system, the method is: two sets of high concentration mother liquor of conventional potassium content and no potassium are prepared, after dilution, potassium-containing nutrient solution is continuously supplied in the early stage of plant growth;When the fresh weight of the whole plant reaches the potassium threshold value calculated from the target fresh sample potassium content, conventional lettuce potassium content and aboveground fresh weight, accurately switch to no potassium nutrient solution until harvest;At the same time, replace potassium salt with equimolar sodium salt / calcium salt to maintain conductivity and ion balance during the no potassium stage, fine control with 1.3-1.5 mS / cm EC and 5.5-6.5 pH, ensure root health and yield quality.The system does not require special light source or temperature control facilities, suitable for deep liquid flow, shallow liquid flow and aeroponic multiple soilless platform lettuce production, batch stable to achieve 100±10 mg / 100 g (fresh sample) of low potassium product, with the advantages of simple operation, strong repeatability and high industrialization promotion value.

The present disclosure relates to the field of potassium sulfate preparation methods, and provides a method for producing potassium sulfate using a metathesis process, a potassium sulfate product, and a potash fertilizer. The method comprises: using an ammonium sulfate solid and a potassium chloride solid as raw materials, and adding same in two steps to carry out a first-stage reaction and a second-stage reaction respectively; then, mixing with hot water to carry out a third-stage reaction, and then performing crystallization and separation to thoroughly remove impurities from a product and increase the content of K2O in the product. By means of the three-stage reaction process provided in the present disclosure, a potassium sulfate product with high K2O content and low chlorine content can be prepared, and the method is simple and easy to implement and is suitable for industrial application.

The present disclosure discloses a method for producing potassium sulfate by a metathesis process, a potassium sulfate product and a potash fertilizer, and relates to the field of potassium sulfate preparation methods. A solid ammonium sulfate and a solid potassium chloride are used as raw materials and are added in two steps for reaction, a first-stage reaction and a second-stage reaction are respectively carried out, then a third-stage reaction with hot water is carried out, and crystallization and separation are carried out, such that impurities in the product are fully removed, and meanwhile, the content of K2O in the product is increased. The potassium sulfate product with high K2O content and low chlorine content can be prepared through the three-stage reaction process provided by the present disclosure, and the method is simple and easy to implement and convenient for industrial application.

The invention provides a method for removing heavy metals from low-rank coal and preparing potassium humate through thermocatalysis. The method comprises the following steps: mixing the low-rank coal, a reducing agent and water to prepare a reactant A; mixing the reactant A with potassium hydroxide and a catalyst to prepare a reactant B; after the reactant B is naturally cooled to the room temperature, centrifugation, filtration and solid-liquid separation are carried out, and a potassium humate product is obtained.According to the method, hexavalent chromium in the low-rank coal is reduced into trivalent chromium through the reducing agent, follow-up removal is facilitated, a thermocatalytic reaction is carried out under the combined action of air and the catalyst, functional groups of the low-rank coal are enriched, the extraction rate of humic acid is increased, and the yield of the low-rank coal is increased. According to the method, non-fuel high-added-value utilization of the low-rank coal is achieved through a simple and convenient process, the potassium humate product with the high added value is obtained, and the method is an efficient low-consumption mild potassium humate preparation technology; and the method has good economic value and environmental benefit.