15 results about "Ammonium thiocyanate" patented technology

The invention discloses lithium sulfide, a two-step double decomposition preparation method and application of the lithium sulfide in an all-solid-state battery, and belongs to the technical field of solid-state batteries. According to the preparation method, a two-step decomposition synthesis technology is adopted, lithium carbonate and ammonium thiocyanate are used as raw materials, the raw materials are uniformly mixed and then placed in a high-temperature reactor, a step heating sintering procedure is completed in an inert gas atmosphere, and the purpose of fully decomposing and converting the raw materials is achieved by accurately controlling the temperature and the time; after a product is obtained through reaction, the high-purity lithium sulfide material is obtained after the product is cooled to the room temperature. The method for preparing the lithium sulfide is low in raw material cost, simple in reactant formula and free of side reaction in the reaction process, and the finally generated product is few in impurity, high in purity and good in crystallinity.

The application discloses a preparation method of a lead-tin mixed perovskite single crystal thin film and near-infrared detection application thereof, and relates to the technical field of photoelectric materials and devices. The method introduces an anti-solvent into a saturated precursor liquid to prepare a high-quality seed layer, and dynamically supplements a growth liquid in a key stage of space-limited growth, effectively solves a crystal boundary pore problem caused by solute depletion, and successfully prepares a dense, pore-free and continuous lead-tin mixed perovskite single crystal thin film. Further combined with precursor liquid concentration optimization, an ammonium thiocyanate additive and Me-4PACz interface modification, the defect state density of the thin film is significantly reduced.

The application provides a method for preparing calcium thiocyanate by using desulfurization waste liquid, calcium nitrate and ammonium thiocyanate are respectively dissolved into 30-50% solution, the calcium nitrate solution is slowly dropped into the hot ammonium thiocyanate solution under the conditions of heating and stirring, under the heating state, the double decomposition reaction occurs to generate calcium thiocyanate and ammonium nitrate, with the continuous heating and the evaporation of water, the concentration of calcium thiocyanate gradually increases, the ammonium nitrate is heated and decomposed to generate nitrogen oxide and ammonia gas, the generated process gas rich in nitrogen oxide and ammonia gas is condensed and introduced into the coking ammonia removal and denitration section for treatment, and finally the evaporation and concentration obtain about 50% calcium thiocyanate product. The method uses industrial waste to provide raw materials, and the production cost is low; the process tail gas generated in the reaction only needs to be treated by the existing ammonia removal and denitration device of the coking enterprise, without increasing additional equipment, thereby saving the expenditure; and the method has environmental protection benefit, social benefit and economic benefit.

The application discloses a composite material, a film and a preparation method thereof, an optoelectronic device and a display device. The composite material comprises an organic semiconductor material and an ammonium thiocyanate salt. The composite material has a high carrier mobility.

The acid-base indicator has important application in the fields of chemical industry, food, medicine and the like, so that a plurality of inorganic and organic acid-base indicators are invented by people. The invention prepares two novel acid-base indicators with similar processes and properties. The method specifically comprises the following steps: firstly, dissolving chitosan by using an aqueous solution of lactic acid, then adding a ferrous sulfate solution into the solution, and dialyzing and standing to obtain a solution containing ferrous ions. Adding potassium ferricyanide into the solution to obtain an indicator A; adding ammonium thiocyanate and a small amount of sulfuric acid into the indicator A to obtain an indicator B; the two indicators are blue and faint yellow when the pH value is 9-10 or above. Wherein the indicator B can still turn blue after being added into the acid solution again.

The invention relates to the technical field of a continuous aqueous solution method for continuously synthesizing thiourea from ammonium thiocyanate, in particular to a thiourea continuous synthesis system and method, which comprises a raw material storage unit, a tubular reactor group, an ion resin exchange column unit, a concentration crystallizer, a solid-liquid separator and a continuous dryer which are arranged in sequence, the layered ion resin exchange column unit is used for replacing an existing ion exchange column and is applied to the continuous synthesis system of the thiourea, so that when a thiourea mixed solution is separated, the upper, middle and lower layers of ion resin in the ion resin exchange column unit can participate in a purification and separation reaction at the same time, the continuous synthesis efficiency of the thiourea is effectively improved, and the continuous synthesis efficiency of the thiourea is improved. And in the purification and separation process, the thiourea solution separated from the upper layer and the middle layer does not have any influence on the separation work of the ion resin on the lower layer.

The invention provides a method for determining the quality and purity of silver in a ceramic cup with a silver layer on the inner wall, and relates to the technical field of precious metal analysis and detection. In order to solve the technical problems that a silver layer cannot be stripped by an existing physical method and a ceramic matrix bismuth element interferes with purity determination in a chemical method, silver-free ceramic cups of the same batch are adopted as specific blank control, and a salpeter solution with an optimized proportion is utilized to synchronously digest a silver-layer-containing sample and a blank sample under the conditions of specific temperature and time. The mass of silver is accurately measured through an ammonium thiocyanate titration method, the impurity concentration in a sample solution and the impurity concentration in a blank solution are respectively measured in combination with a spectrum method, background interference such as bismuth dissolved out of ceramic is accurately deducted through a subtraction method, and finally the silver purity is obtained through normalization calculation. According to the method, continuous and accurate determination of the quality and purity of silver can be realized through one-time sample dissolution, the problem of interference of a complex matrix is effectively solved, the precision and accuracy of detection are remarkably improved, and a feasible technical scheme is provided for quality detection of the ceramic product containing the silver layer.

The utility model discloses a system for measuring the content of chloride ions in urea for a power plant, which is characterized in that a heater is positioned on a weighing sensor, a measuring reaction cup is positioned on the heater and is of a transparent structure, and a liquid level sensor and a color sensor are arranged on the outer wall of the measuring reaction cup; a stirrer and a temperature sensor are arranged in the measuring reaction cup, and a sample adding hopper is arranged at the top of the measuring reaction cup; an outlet of the high-purity water tank, an outlet of the nitric acid solution tank, an outlet of the silver nitrate solution tank, an outlet of the dibutyl phthalate tank, an outlet of the ammonium ferric sulfate solution tank and an outlet of the ammonium thiocyanate solution tank are communicated with the measurement reaction cup. The system can accurately measure the content of chloride ions in urea.

The application discloses a detection structure capable of quickly identifying ferroferric oxide, and a preparation method and application thereof. The detection structure comprises a base body, and potassium ferricyanide and ammonium thiocyanate which are respectively adsorbed on opposite ends of the base body. The detection structure can quickly identify whether the ferroferric oxide is contained in a to-be-detected substance. The detection structure has low detection limit, high accuracy and simple operation.

The application discloses a lithium sulfide and a two-step metathesis preparation method and application in a full solid-state battery, and belongs to the technical field of solid-state batteries. The preparation method adopts a two-step decomposition synthesis technology, lithium carbonate and ammonium thiocyanate are used as raw materials, the raw materials are uniformly mixed and then placed in a high-temperature reactor, a step-by-step sintering process is completed under an inert gas atmosphere, and through accurate control of temperature and time, the full decomposition and conversion of the raw materials are realized; after the reaction, the product is cooled to room temperature to obtain a high-purity lithium sulfide material. In the method for preparing the lithium sulfide, the raw material cost is low, the reactant formula is simple, the reaction process is free of side reactions, the finally generated product is low in impurities, high in purity and good in crystallinity.

This invention relates to the field of coal-based solid waste resource utilization technology, and discloses a method for extracting and detecting trace elements boron and molybdenum in coal gangue, comprising two parallel methods: alkali fusion and acid dissolution. In the alkali fusion method, coal gangue is mixed with anhydrous sodium carbonate at a ratio of 1:8, and the mixture is heated stepwise to 900-920℃ for 30 minutes. The melt is then dissolved in hot water and hydrochloric acid to obtain the test solution. In the acid dissolution method, coal gangue is pretreated by calcination at 550℃, digested with a mixed acid (hydrochloric acid, nitric acid, hydrofluoric acid, and perchloric acid in a volume ratio of 3:1:3:1) at 200℃, and the acid is removed before dissolving in hydrochloric acid to obtain the test solution. The boron and molybdenum contents in both test solutions are determined spectrophotometrically. Boron is determined using the methylimine colorimetric method at a wavelength of 420 nm, and molybdenum is determined using the ammonium thiocyanate extraction method at a wavelength of 470 nm. This invention provides two methods suitable for the extraction and detection of trace elements boron and molybdenum in coal gangue, with advantages of thorough decomposition, good repeatability, and high accuracy.

This invention discloses a two-way dry distillation apparatus, method, and application for the co-production of multiple products from sulfur foam and desulfurization wastewater, belonging to the field of chemical production technology. The apparatus includes: a feed processing unit, a dry distillation and separation unit, and a product production unit; the feed processing unit includes a filter; the dry distillation and separation unit includes a two-way separation tower; the product production unit includes a refined sulfur production module, an ammonium thiocyanate production module, and a sulfuric acid production module. The method includes feed processing, dry distillation separation, and product production steps, and can flexibly select to produce refined sulfur, ammonium thiocyanate, and / or sulfuric acid according to market demand. This invention achieves efficient separation of sulfur and salt components through a two-way separation tower and flexibly switches between multiple production modes through an automatic control system, solving the problems of single product and lack of market adaptability in existing technologies. It has advantages such as low investment cost, low operating cost, high degree of automation, good environmental protection effect, and significant economic benefits.

This invention provides a method for determining the mass and purity of silver in ceramic cups with a silver layer on the inner wall, belonging to the field of precious metal analysis and detection technology. Addressing the technical problems of existing physical methods being unable to remove the silver layer and chemical methods being affected by bismuth interference from the ceramic matrix in purity determination, this invention uses silver-free ceramic cups from the same batch as a specific blank control. The silver-layered sample and the blank sample are simultaneously digested using an optimized ratio of nitric acid solution under specific temperature and time conditions. The mass of silver is accurately determined by ammonium thiocyanate titration, and the impurity concentrations in the sample and blank solutions are determined separately by spectroscopic methods. Background interference such as bismuth dissolved from the ceramic is accurately subtracted using a difference method, and the silver purity is finally calculated through normalization. This method enables continuous and accurate determination of silver mass and purity with a single sample dissolution, effectively solving the problem of interference from complex matrices, significantly improving the precision and accuracy of detection, and providing a feasible technical solution for the quality inspection of silver-layered ceramic products.

Hypergolic two-component system for space propulsion, comprising an oxidizer and a fuel which are provided separately and are brought into contact with each other in a thruster to react, wherein the oxidizer comprises hydrogen peroxide, characterized in that the fuel is a multi-component mixture comprising ammonium thiocyanate, a molecular liquid and an ionic liquid comprising a thiocyanate anion and one or more cations.

This invention discloses a resource-based treatment process and system for desulfurization wastewater in the coking industry, belonging to the technical field of utilization and treatment of desulfurization wastewater in the coking industry. The system includes a decolorization device, a preheater, a mixer, a first reactor, a second reactor, a third reactor, a fourth reactor, a fifth reactor, and a conversion tower. After decolorization, preheating, mixing with acid, multiple reactions, catalytic conversion, and cooling separation, all ammonium thiosulfate and ammonium thiocyanate in the desulfurization wastewater are converted into ammonium sulfate and sulfur. Then, taking advantage of the water shortage and salt production characteristics of the ammonium sulfate section in the coking system, the resource-based recovery and treatment of ammonium sulfate and water in the converted solution is achieved. Through the setup of multiple reactors and effective control of experimental conditions, this invention can achieve the effective recovery and utilization of resources such as sulfur, nitrogen, and water in the desulfurization wastewater; while reducing the difficulty of treating the conversion waste gas, it increases the sulfur yield and improves the continuity and economy of the wastewater treatment process.