15 results about "Hydrogen Sulfate" patented technology

This invention provides a method for recovering lithium from lithium-containing aluminum electrolyte waste, relating to the field of lithium-containing waste resource utilization. The lithium-containing aluminum electrolyte waste is mixed with a calcium-containing substance and roasted. The calcium-containing substance includes a first calcium-containing substance and a second calcium-containing substance. The first calcium-containing substance is at least one selected from calcium sulfate, calcium bisulfate, calcium carbonate, or calcium bicarbonate. The second calcium-containing substance is at least one selected from calcium carbonate, bicarbonate, sulfate, bisulfate, hydroxide, oxide, or chloride. The molar ratio of calcium in the calcium-containing substance to aluminum in the lithium-containing aluminum electrolyte is controlled at 1-4:1. The molar amount of calcium in the carbonate, bicarbonate, sulfate, and bisulfate is 40%-80% of the total molar amount of calcium in the calcium-containing substance. After roasting, the roasted clinker is mixed with an acidic leachate for lithium extraction. This method significantly improves the lithium leaching rate and effectively and selectively recovers high-value lithium from lithium-containing aluminum electrolytes.

The utility model relates to potassium hydrogen sulfate composite powder processing technical field, concretely relates to a kind of potassium hydrogen sulfate composite powder premixing mechanism, including support seat, the potassium hydrogen sulfate composite powder premixing mechanism further includes: cradle is rotationally arranged on the support seat, mixing tank is rotationally arranged in the cradle, the drive part for driving mixing tank autorotation, several helical blades are fixed in the mixing tank inside circumferentially uniformly, and the mixing area is formed by surrounding between adjacent two helical blades.The utility model can autorotate mixing tank under the driving of drive part after raw material is filled and tightened can cover, and cradle is reciprocatingly deflected along mixing tank axial under the driving of reciprocating driving element, so that raw material flows, rolls mixing in mixing tank, greatly weaken the collision, vibration degree in mixing process of raw material, improve mixing effect.

This application provides a method for recycling lithium-aluminum-silicon glass waste, relating to the field of solid waste resource utilization. The method includes: mixing lithium-aluminum-silicon glass waste powder with additives, calcining to obtain a calcined material, wherein the additives include sodium and calcium salts, the sodium salt including at least one of sodium sulfate and sodium bisulfate, and the calcium salt including at least one of calcium sulfate and calcium bisulfate. The molar amount of calcium in the additives is more than 0.4 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste, and the molar amount of sodium is more than 0.9 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste. The calcined material is then mixed with a leaching agent for leaching. The lithium-containing leaching solution of this application contains few types and amounts of impurities, and high-purity lithium compounds can be prepared after simple impurity removal treatment. This enables efficient recovery and reuse of valuable elements in low-value lithium-aluminum-silicon glass waste, solving the environmental pollution problem caused by glass waste stockpiling and reducing space occupation.

This invention discloses a method for the zero-carbon resource utilization of phosphogypsum and desulfurized gypsum to prepare acids, bases, and highly active calcium, relating to the field of phosphogypsum and desulfurized gypsum recycling technology. The process involves thoroughly washing phosphogypsum and desulfurized gypsum, reacting them with sodium carbonate, followed by flotation, solid-liquid separation, multi-stage membrane filtration, chelating resin adsorption, and bipolar membrane electrodialysis to produce sulfuric acid, sodium hydroxide, and circulating purified water. The floated material undergoes solid-liquid separation, drying, calcination, and fluidized bed reaction to produce calcium hydroxide, while simultaneously enriching and separating heavy metals. The fluidized bed waste heat is used for cascaded power generation, and the tail gas from the electromagnetic rotary kiln is treated with sodium hydroxide absorbent to generate sodium carbonate, achieving full element recovery, zero new waste emissions, and zero carbon emissions in the production process. The process is highly efficient and energy-saving, producing high-purity products suitable for industrial applications.

The present invention provides: a novel additive containing an ionic liquid that can be used for a composition for forming a cathode catalyst layer of a polymer electrolyte fuel cell; a novel composition for forming a cathode catalyst; and a novel cathode catalyst layer formed using the same.　The present invention relates to a composition for forming a cathode catalyst layer of a polymer electrolyte fuel cell, the composition containing an ionic liquid represented by formula (1). In the formula, X represents an atomic group containing a nitrogen atom or a phosphorus atom; Y represents a hydrogen atom, a carboxy group, or a sulfonic acid group; Z-represents a hydrogen sulfate anion, a trifluoromethanesulfonate anion, a bis(trifluoromethylsulfonyl)imide anion, a halogen anion, a tetrafluoroborate anion, a hexafluorophosphate anion, a bis(fluorosulfonyl)imide anion, or a nonafluorobutanesulfonate anion; and n represents an integer of 2-4.

This application discloses a crystal form of an acid addition salt of an ATR inhibitor, its preparation method, and its uses. The crystal form of the acid addition salt includes at least one of the hydrogen sulfate and methanesulfonate crystal forms of the compound shown in formula (I). The crystal form of the acid addition salt of this application has advantages such as strong preparation stability, high solubility, and low hygroscopicity, making it more suitable for formulation preparation. (I)

The application provides a kind of catalyst recyclable carboxin synthesis method, belong to organic synthesis technical field, comprising: the condensation reaction of alpha-chloroacetyl acetanilide and 2-mercaptoethanol under alkaline conditions, intermediate is obtained by separation;With toluene as solvent, the obtained intermediate is mixed with ionic liquid catalyst to form a reaction system, heating reaction, after the reaction is completed, the temperature of the reaction system is reduced to 5-25 DEG C, the reaction system is layered, then separation treatment is carried out, carboxin product and separated ionic liquid catalyst are obtained, then the separated ionic liquid catalyst is regenerated by dehydration and recycled;Wherein, the ionic liquid catalyst is 1-(polyethylene glycol monomethyl ether group)-3-(3-sulfopropyl) imidazole hydrogen sulfate salt.The reaction system has homogeneous high-efficiency conversion at high temperature and automatic separation at low temperature, which realizes the green upgrading of carboxin synthesis process.

The application provides a 2-aminoethyl hydrogen sulfate synthesis method, first, ethanolamine and centrifugal mother liquor are mixed in a mixer by a transfusion pump according to a certain proportion, then the mixture is introduced into a first-stage tubular reactor to react, then the reaction solution is mixed with sulfuric acid, after the mixing, the mixture is introduced into a second-stage tubular reactor to react, after the reaction is completed, the reaction solution is cooled and crystallized, and 2-aminoethyl hydrogen sulfate is obtained by centrifugal drying. The application has the advantages that the solubility of 2-aminoethyl hydrogen sulfate in the reaction solution is significantly improved, the situation that a large amount of solid is precipitated in the reaction process is effectively avoided, the high reaction conversion rate is ensured, the conditions for the optimization of the crystallization process are provided, and the problems of the solid content fluctuation and the unstable crystallization state caused by the dehydration control are fundamentally solved.

This invention provides a roasting aid for lithium-containing aluminum electrolyte waste, its preparation method, application, and application method in the resource recovery of lithium-containing aluminum electrolyte waste, as well as roasted clinker, relating to the field of lithium-containing waste recycling. The roasting aid for lithium-containing aluminum electrolyte waste contains a first calcium-containing substance and a second calcium-containing substance. The first calcium-containing substance is at least one of calcium sulfate, calcium bisulfate, calcium carbonate, or calcium bicarbonate. The second calcium-containing substance is at least one of calcium carbonate, bicarbonate, sulfate, bisulfate, hydroxide, oxide, or chloride. The second calcium-containing substance and the first calcium-containing substance contain different or dissimilar anions. The molar amount of calcium in the first calcium-containing substance accounts for 40%-80% of the total molar amount of calcium. Furthermore, the ratio of the total molar amount of calcium in the first and second calcium-containing substances to the molar amount of aluminum in the lithium-containing aluminum electrolyte waste is 1-4:1. The roasting aid of this invention has high roasting efficiency, good roasting effect, and low energy consumption.

The present application relates to the technical field of cobalt-based alloy silicon content detection, and particularly relates to a method for detecting silicon content in cobalt-based alloy, wherein the cobalt-based alloy sample is first digested with hydrochloric acid and nitric acid, and the silicon acid is dehydrated by fuming perchloric acid smoke; after washing, the precipitate is burned into silicon dioxide and other impure oxides; then the silicon is converted into silicon tetrafluoride and removed by treatment with sulfuric acid-hydrofluoric acid; the residue is burned again, and the loss in the two burning processes is the weight of silicon tetrafluoride; therefore, the silicon content can be calculated according to the mass difference before and after the silicon removal. The method does not require expensive instruments and equipment, is simple to operate, has low cost, and is highly accurate.

A device for preventing ammonium bisulfate blockage in a flue gas heater, relating to the field of flue gas heater technology, includes a housing. Inside the housing, from front to back, are arranged a first gradient heating area, a second gradient heating area, and a third gradient heating area. Multiple heat exchange tubes are arranged in a rectangular array within each of the three heating areas, and these tubes are connected by connecting pipes. A controller is installed at the top of the housing to heat the heat exchange tubes in different areas. An ultrasonic vibration mechanism is provided at the bottom of the housing, and a base is located below the housing. Shock-absorbing mechanisms are installed at the four corners between the base and the housing. This solution solves the problem of blockage caused by solidified ammonium bisulfate adhering to the surface of the flue gas heater.

The application provides a preparation method of anti-caking 2-aminoethanol hydrogen sulfate spherulites. By optimizing the preparation of a seed slurry, a dehydration rate, a reaction endpoint temperature, and the subsequent cooling process, the crystallization growth process of 2-aminoethanol hydrogen sulfate is controlled, and the 2-aminoethanol hydrogen sulfate with an average particle size greater than 600 mu m is prepared through drying, so that the product has high yield and high purity.

The application provides a method and system for resourceful treatment of high-salinity gas field water. The method comprises a pretreatment section, a mother liquor generation section, a sodium bicarbonate generation section, an ammonium chloride generation section, an ammonium sulfate generation section, and an ammonium sulfate decomposition section. The method of the application introduces ammonia gas into the generated mother liquor to saturate the amount of dissolved ammonia gas in the mother liquor; and continues to introduce carbon dioxide into the mother liquor to precipitate sodium bicarbonate solids from the mother liquor and filter to obtain sodium bicarbonate. The method of the application also includes cooling the mother liquor from which the sodium bicarbonate solids have been removed to below 10°C to precipitate ammonium chloride solids and filter to obtain ammonium chloride; and introducing sulfuric acid hydrogen ammonia to react with the ammonium chloride generated in the ammonium chloride generation section to generate ammonium sulfate and hydrogen chloride; and decomposing the ammonium sulfate to generate ammonia gas and sulfuric acid hydrogen ammonia. The method and system of the application achieve high-value utilization of waste resources.

The present application provides a kind of low bulk density aminoethyl hydrogen sulfate synthesis method with operation and crystallization control as core: by the intermediate product formed in the reaction process of ethanolamine and sulfuric acid is carried out staged vacuum dehydration, and in the dehydration crystallization process, crystal growth regulation measures are introduced, the controllable crystallization of product is realized, so that the bulk density of product is significantly reduced, effectively avoid its hardening and caking in the process of storage and transportation.The process of the present application realizes that the bulk density is less than or equal to 0.50 g / cm3, preferably 0.35-0.45 g / cm3, significantly improves the efficiency of solid-liquid separation and drying, and improves the subsequent ethyleneimine continuous cyclization yield and stability.

The present application belongs to the field of steel material metallographic detection, and particularly relates to a display method of phosphorus element distribution of cord steel. The present application provides a phosphorus element distribution etchant solution which is composed of sodium bisulfite, calcium bisulfite and distilled water, wherein the concentration of sodium bisulfite is 1.2-1.4 g / mL, and the concentration of calcium bisulfite is 0.03-0.06 g / mL. The display method of phosphorus element distribution of cord steel comprises the following steps: preparing a cord steel metallographic sample, immersing the polished surface of the metallographic sample into the etchant solution for etching, observing the etched surface of the sample under an optical microscope, and observing the bright yellow linear strip as the phosphorus segregation area. The stability research shows that the etchant solution of the present application has high stability and does not need to be prepared and used immediately; the energy spectrum component analysis result shows that the etchant of the present application can clearly and reliably display the distribution of phosphorus element in the cord steel, and provides efficient, convenient and reliable detection technical support for the research of phosphorus element distribution of cord steel wire rod.