6 results about "Potassium product" patented technology

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.

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.