20 results about "Ammonium sulphide" patented technology

The invention discloses a method for preparing a carbon monoxide oxidation catalyst by using red mud and tungsten-molybdenum smelting slag, which comprises the following steps of: uniformly stirring and mixing the red mud and the tungsten-molybdenum smelting slag at a high speed, mixing with inorganic strong acid, and performing ultrasonic-assisted stirring to obtain acid leaching slag; the acid leaching residues are subjected to low-temperature plasma activating treatment and then microwave activating treatment, and microwave activated plasma residues are obtained; weighing tricalcium phosphate and microwave activated plasma slag, and uniformly stirring to obtain phosphorus-calcium doped activated slag; weighing an ammonium sulfide solution and the phosphorus-calcium doped activated slag, uniformly stirring, transferring the obtained sulfur-phosphorus-calcium doped activated slag into a hydrothermal reaction kettle, carrying out hydrothermal reaction, carrying out compression molding on the obtained hydrothermal composite material, and carrying out pyrolysis carbonization treatment in an inert gas atmosphere to obtain the phosphorus-calcium doped activated slag. The obtained pyrolysis composite material is soaked with a silane coupling agent solution and then roasted again, and the carbon monoxide oxidation catalyst is obtained. The catalyst prepared by the invention can realize efficient oxidation photocatalysis of carbon monoxide under the conditions of normal temperature and normal pressure.

The invention discloses a tungsten-molybdenum separation method based on tungsten coprecipitation inhibition. The tungsten-molybdenum separation method comprises the following steps: measuring the content of each ion in a tungsten-molybdenum mixed solution; converting Fe < 3 + > and Cu < 2 + > into water-soluble complexes, precipitating and separating out Si < 4 + >, and filtering to obtain a pretreated solution; adjusting the pH value of the pretreated solution to 4.5-6.0, raising the temperature to 40-55 DEG C, adding a compound complexing agent and a precipitation accelerator, then adding an ammonium sulfide solution, maintaining the pH value of the system, continuing the reaction until the end, and performing solid-liquid separation on the product to obtain filtrate and filter residues; washing and drying filter residues to obtain molybdenum sulfide; and combining the washing liquid of the filter residues and the filtrate, and obtaining a tungsten product through an ion exchange method. The invention innovatively provides a double-function technical route of selectively vulcanizing and precipitating molybdenum and complexing and stabilizing tungsten in situ, and efficient separation of tungsten and molybdenum and zero waste of tungsten resources are realized by accurately regulating and controlling a reaction environment and optimizing a reagent system.

11 / 07 / 2561 (OCR) Page 1 of 1. Summary of the invention: A device and method for controlling aerosol formation during adsorption in ammonia desulfurization, by removing sulfur dioxide from the gas spool with an adsorption circulation fluid containing ammonium sulfide, to control aerosol formation during adsorption in ammonia desulfurization. Efficient desulfurization and removal (sulfur dioxide) can be achieved by controlling the solution composition in stages and controlling the reaction conditions at the same time. Ammonia leakage and aerosol production during adsorption can be controlled. The gas spool may be introduced into the initial cooling and purification stage, and may be allowed to come into contact with the adsorption circulation fluid and the fine particle washing circulation fluid, respectively. The level of solution composition and reaction temperature can be controlled. ------------

The invention provides application of water-soluble inorganic sulfide in improvement of plant salt stress resistance and / or improvement of saline-alkali soil, relates to the technical field of agriculture, and provides application of water-soluble inorganic sulfide in improvement of plant salt stress resistance and / or improvement of saline-alkali soil. The water-soluble inorganic sulfide is selected from at least one of potassium sulfide, ammonium sulfide and calcium polysulfide, the potassium sulfide, the ammonium sulfide and the calcium polysulfide can effectively improve the germination ability of plant seeds under salt stress, and the calcium polysulfide can effectively improve the plant antioxidant system activity and the plant photosynthesis efficiency; the survival rate and the growth performance of the plants under salt stress are effectively improved; the water-soluble inorganic sulfide solution can effectively reduce the EC value of the saline-alkali soil, so that the germination rate of plant seeds in the saline-alkali soil is effectively increased, and the saline-alkali soil is effectively improved. Therefore, the application provided by the invention is of great significance in fully utilizing saline-alkali land resources and improving the crop yield.

The utility model relates to the technical field of caprolactam, in particular to a device for reducing ammonium sulfate content in amide oil, which comprises a static mixer, the static mixer is provided with an amide oil feed pipe and a benzene feed pipe, a discharge port of the static mixer is connected to a decanter after passing through a decanter feed pump and a heat exchanger, the decanter is provided with a heavy phase discharge port and a light phase discharge port, and the heavy phase discharge port is connected with the light phase discharge port. A light-phase discharge port is conveyed to a cyclone membrane filter through a decanter discharge pump, a heavy-phase outlet of the cyclone membrane filter and a heavy-phase discharge port of the decanter are converged and connected to an ammonium sulfate mother liquor tank, and a light-phase outlet of the cyclone membrane filter is connected to a subsequent amide oil purification process. The device is provided with the links of benzene dissolving and crystallization, filtration, cooling, decanting, refiltration, cyclone separation, membrane filtration and the like, ammonium sulfate mother liquor and free ammonium sulfate particles in the amide oil are removed, the quality of the amide oil is improved, and the content of ammonium sulfate in the amide oil can be reduced to 0.5 wt% or below.

The application provides a gaseous sulfur foam flocculation precipitator and application thereof, and comprises at least one of mercaptan, thioether, ammonium sulfide, organic amine and carbon dioxide. The gaseous sulfur foam flocculation precipitator provided by the application is added in H2S gas, and the pressure is not higher than the saturated vapor pressure of each component, so that the sulfur foam can be rapidly agglomerated and large sulfur aggregation particles are formed in the process of generating the sulfur foam, and the sulfur aggregation particles are rapidly precipitated in the reaction process, thereby effectively avoiding the adhesion and blockage of the sulfur, avoiding the continuous cleaning of the reactor, and ensuring the stability of the device operation.

The invention relates to the technical field of lithium sulfide production, and discloses a method for producing lithium sulfide based on an ammonia gas purging lithium chloride double decomposition reaction, and the method comprises the following steps: dissolving lithium chloride in an N-methyl-2-pyrrolidone solvent to form a liquid phase reaction medium; adding ammonium sulfide into the liquid-phase reaction medium to initiate a double decomposition reaction of the lithium chloride and the ammonium sulfide to generate an insoluble lithium sulfide solid, and continuously introducing a purging gas containing ammonia gas to remove hydrogen sulfide gas generated due to a side reaction to obtain a lithium sulfide suspension formed by dispersing the insoluble lithium sulfide solid in a reacted liquid phase; and carrying out solid-liquid separation on the lithium sulfide suspension to separate a lithium sulfide solid from a liquid phase after the reaction so as to obtain a crude solid product containing lithium sulfide. In the metathesis reaction process, gas containing ammonia gas is continuously introduced into a reaction system, and the hydrolysis side reaction of ammonium sulfide at a relatively high temperature is effectively inhibited by utilizing the dual effects of chemical equilibrium inhibition and physical gas stripping.

The invention belongs to the technical field of precursor mother liquor treatment, and particularly relates to a method for treating cobalt carbonate mother liquor, which comprises the following steps: a, adding hydrochloric acid into the cobalt carbonate mother liquor to adjust the pH value to be acidic for decarburization; b, removing cobalt from the decarbonized cobalt carbonate mother liquor in the step a through cobalt removal resin; c, ammonium sulfide is added into the cobalt carbonate mother liquor subjected to cobalt removal in the step b for complex breaking; and d, the cobalt carbonate mother liquor subjected to complex breaking in the step c is continuously subjected to cobalt removal through the cobalt removal resin. According to the method, cobalt removal resin and low-concentration ammonium sulfide are utilized, cobalt in the cobalt carbonate mother liquor is fully recycled, and meanwhile the quality of the byproduct ammonium chloride is improved.

The application relates to the technical field of ITO conductive glass recycling, and discloses a method for leaching and separating indium and tin in ITO conductive glass powder, which comprises the following steps: mixing ITO conductive glass powder with a leaching agent solution to obtain leaching ore slurry; wherein the leaching agent solution is prepared by using oxalic acid, reagent A, reagent B and water; the reagent A is an oxalate, and the reagent B is one of sodium sulfide, ammonium sulfide and TAA; the leaching ore slurry is subjected to stirring leaching, and after leaching reaction, filtration separation is carried out to obtain leaching residue and leaching liquid; the leaching liquid is subjected to hydrolysis and indium precipitation reaction, and after reaction, filtration is carried out to obtain indium precipitation filtrate and indium residue; the method has the advantages of good leaching selectivity, fast indium leaching speed, high leaching rate and low energy consumption in the leaching process, and the indium leaching rate is much higher than that in traditional oxalic acid leaching.

The invention belongs to the technical field of preparation of catalysts for converting desulfurization waste liquid into ammonium sulfate, and particularly relates to a preparation method of a catalyst for converting desulfurization waste liquid into ammonium sulfate, which comprises the following steps of: 1, pretreatment: removing tar, suspended matters and colloid impurities contained in desulfurization and deacidification waste liquid by adopting an air flotation method; according to the method, the fractional precipitation is combined with ultrasonic assistance, the fractional precipitation utilizes the characteristic that different metal ions are precipitated at a specific pH value, and the metal ions are precipitated in sequence by accurately controlling the pH value, so that mutual interference is avoided, the recovery rate and the purity of the active component are improved, and the method is suitable for industrial production. The cavitation effect of ultrasonic waves generates local high temperature, high pressure and strong shock waves and microjets, a diffusion layer in a solution can be broken, the reaction rate of a precipitant and metal ions is increased, meanwhile, agglomeration and growth of precipitates are prevented, the generated precipitates have more uniform particle size distribution and higher specific surface area, and the specific surface area of the precipitates is increased. And a foundation is laid for subsequent preparation of a high-performance catalyst.

The application discloses a sulfidation type shift catalyst protective agent and a catalyst protection method, and belongs to the technical field of sulfur-tolerant shift catalysts. Sulfidation state shift catalysts need to be passivated or pretreated in other ways to facilitate catalyst storage and transportation, but the existing methods may have the phenomena of affecting catalyst activity, complex application starting process or equipment blockage. The application comprises 92-99wt% of a solvent and 1-8wt% of a protective component; wherein the solvent comprises 95-99.5wt% of an ethanol solution and 0.5-5.0wt% of diethyl ether, the ethanol solution is an ethanol solution with an ethanol mass content of 95% or more; and the protective component comprises a mixture of one or more of n-heptane, ammonium sulfide and glyceride in any proportion. The obtained sulfidation state catalyst can be stably stored, transported and filled in air without heating, significantly reduces the catalyst starting time and is convenient to use.

The invention belongs to the technical field of petrochemical engineering, particularly relates to an ammonium hydrosulfide erosion simulation experiment device for a hydrocracking unit and a testing method, and designs the ammonium hydrosulfide erosion simulation experiment device and method for the hydrocracking unit. Through the structure of the patent, simulation test research can be carried out on flow erosion conditions of high-risk corrosion media such as ammonium sulfide and ammonium hydrosulfide in a high-pressure heat exchanger of a hydrocracking unit, and erosion simulation under specific conditions is realized by controlling key corrosion erosion parameters such as flow velocity, temperature, spraying angle and medium concentration; self-circulation erosion of a corrosion medium is achieved through a circulating pump, the inclination angle of a corrosion sample table is remotely and accurately controlled, the spraying center of a nozzle can be automatically calibrated, accurate testing of a metal sample at different spraying angles can be achieved, the corrosion rate can be calculated in real time through an ultrasonic thickness measuring probe, and the experiment efficiency is greatly improved.

The application relates to a preparation method and application of a pre-sulfurized sulfur-tolerant shift catalyst, and belongs to the technical field of pre-sulfurized sulfur-tolerant shift catalysts. The pre-sulfurized catalyst in the prior art has a complex manufacturing process, or needs ammonia gas in the manufacturing process. The application comprises the following steps: 1) mixing cobalt nitrate and organic acid to obtain solution A; dissolving ammonium molybdate in an ammonium polysulfide solution, and then adding organic amine to obtain solution B; a thiourea solution is recorded as C; 2) uniformly mixing carrier components, then adding solution B, solution A and solution C in sequence, kneading and forming, and drying at 50-90 DEG C to obtain a pre-sulfurized sulfur-tolerant shift catalyst; the thiourea content in solution C is 1-4% of the total weight of the catalyst. The preparation process is simple, easy to implement, safe and environment-friendly, has high catalytic activity, and is low in application cost.

The application discloses a kind of oxidation prevention processing method of active region in DFB laser, comprising: first, on the etching surface exposed to AlInGaAs active region side wall, sulfide passivation protective layer is formed by treating ammonium polysulfide solution;Subsequently, mixed gas of organic silicon precursor vapor and ozone is applied to carry out gas phase treatment, and siloxane-based crosslinking network is constructed on the surface and edge of protective layer, to form mechanically reinforced composite protective layer;Finally, in phosphorus source atmosphere, near-infrared laser pulse of specific wavelength is scanned and background resistance heating is simultaneously carried out, and the composite protective layer is decomposed by light-heat synergistic desorption, to expose clean AlInGaAs etching surface, and to complete selective epitaxial growth of InGaAsP material layer.The application realizes mechanical reinforcement by the composite structure of sulfide passivation protective layer and siloxane-based crosslinking network, and accurately controls thermal decomposition process by combining light-heat synergistic desorption treatment, to solve the problem of active region sidewall oxidation and desorption thermal stress.

The invention discloses a silver sulfide coated sulfur-carbon positive electrode material and a preparation method and application thereof, and the method comprises the following steps: preparing a precursor solution A containing Ag ions; dissolving ammonium sulfide in deionized water to prepare a precursor solution B; dispersing a sulfur-carbon compound in deionized water to prepare a precursor dispersion liquid C; and adding the precursor solution A and the precursor solution B into the precursor dispersion liquid C in an atomizing manner to react, and after the reaction is completed, centrifuging the reaction liquid, precipitating, filtering and drying in vacuum to obtain the composite material. A coating layer is arranged on the surface of the sulfur-carbon positive electrode material, and the coating layer is mainly Ag2S. The material is used as a lithium-sulfur battery positive electrode material, silver sulfide in the material participates in a reaction, the ionic conductivity at a positive electrode interface is remarkably improved, meanwhile, the silver sulfide coating the sulfur surface can react with lithium ions in situ, a layer of nano silver is generated on the sulfur surface, and the interface dynamics of the electrode material is remarkably improved.

The application discloses a method for preparing platinum group metals from waste materials. The method comprises the following steps: high-temperature calcination of the waste materials with activated carbon and combustion-supporting agents to remove organic matters; high-temperature calcination of the waste materials with zinc powder to activate the waste materials; removal of part of impurities through subsequent oxidation leaching; preparation of a solution and a crystal corresponding to a platinum group metal compound through an oxidation-reduction process; reduction and dissolution of the platinum group metal compound with the aid of a reaction aid; purification of the platinum group metal compound through ammonium sulfide to obtain a pure iridium compound; purification of the pure iridium compound through adsorption resin to obtain a pure rhodium compound crystal; and finally, calcination and reduction to obtain a corresponding high-purity platinum group metal powder.

The present application relates to coke oven gas desulfurization technical field, especially relates to a kind of low by-product salt generation's wet desulfurization process method and device, process method includes the following steps: precooling, desulfurization and regeneration step, wherein, by in precooling step, precooling tower uses "filtering screen plate+three filler layer+double spray pipe" structure, coal gas is filtered first through the dust impurities in coal gas of rotating filtering screen plate, then two-stage spray cooling is contacted with filler layer, so that coal gas temperature is accurately cooled to 25 DEG C, the design not only removes impurities, also creates suitable temperature condition for subsequent desulfurization, improves reaction efficiency, avoids the influence of dust impurities on precooling efficiency and desulfurization efficiency, so that coke oven gas wet desulfurization efficiency is greatly improved, reduces the interference of desulfurization reaction, reduces the invalid loss of catalyst, simultaneously, in desulfurization step, by adjusting the molar ratio of NH3 in ammonia water in desulfurization tower and H2S in tower, reaction is prompted to the direction conducive to the generation of ammonium sulfide.

The utility model relates to the technical field of coke oven gas desulfurization processing systems, in particular to a thio optimization system for a coke oven gas desulfurization process, which is characterized in that a thio regulation device is added on the basis of an existing HPF-method coke oven gas desulfurization system, H2S monitoring technology of the thio regulation device is utilized, and real-time ammonia water supplementing and adding technology of an ammonia adding module is matched, so that the thio optimization of the coke oven gas desulfurization process is realized. The molar ratio of NH3 in ammonia water in the desulfurization tower to H2S in the tower is promoted to be greater than 2: 1, so that the reaction is promoted to be carried out in a direction beneficial to generating ammonium sulfide, NH3 in the ammonia water can fully react with H2S in the desulfurization process, the sulfur absorption rate of the system to coke oven gas is further improved, more ammonium sulfide is generated as much as possible, and the coke oven gas desulfurization efficiency is improved. The yield of elemental sulfur after decomposition of ammonium sulfide is increased, the sulfur recovery rate is increased, less ammonium hydrosulfide is generated, the generation of low-value by-salt ammonium thiosulfate is reduced in the regeneration process, the economic benefit is increased, the ammonia loss rate of the system is reduced, the loss is reduced, the cost is saved, and the stability of the system is improved.

The invention discloses an anti-oxidation treatment method for an active region in a DFB laser, and the method comprises the steps: firstly, carrying out the treatment of an ammonium polysulfide solution on an etching surface where the side wall of an AlInGaAs active region is exposed, and forming a sulfide passivation protection layer; then applying mixed gas of organic silicon precursor steam and ozone to carry out gas-phase treatment, and constructing a siloxane-based cross-linked network on the surface and the edge of the protective layer to form a mechanically reinforced composite protective layer; and finally, in an atmosphere containing a phosphorus source, scanning by adopting a near-infrared laser pulse with a specific wavelength and synchronously carrying out background resistance heating, decomposing the composite protection layer through photo-thermal synergistic desorption, exposing a clean AlInGaAs etching surface, and completing selective epitaxial growth of the InGaAsP material layer. According to the invention, mechanical reinforcement is realized through a composite structure of a sulfide passivation protection layer and a siloxane-based cross-linked network, the thermal decomposition process is accurately controlled in combination with photo-thermal synergistic desorption treatment, and the problems of side wall oxidation and desorption thermal stress of an active region are solved.

The invention belongs to the field of nano composite materials, and particularly discloses a nano vanadium dioxide composite material and a preparation method and application thereof.The nano vanadium dioxide composite material is characterized in that nano VO2 particles are modified through a CuS-modified TiO2 material, the CuS-modified TiO2 material accounts for 20%-80% of the mass of the whole nano vanadium dioxide composite material, and the CuS-modified TiO2 material accounts for 20%-30% of the mass of the whole nano vanadium dioxide composite material. The CuS modified TiO2 material is used for reducing the phase transition temperature of VO2 and keeping the sunlight transmittance to reach 10.3%-16.4% at the same time. Copper chloride dihydrate is adopted as a copper source, an ammonium sulfide solution is adopted as a sulfur source, CuS is deposited on the surface of nano TiO2 through a chemical deposition method under the conditions of high temperature and high pressure, and then the nano VO2 composite powder is prepared through mechanical compounding. The nano vanadium dioxide composite material disclosed by the invention has relatively low phase change temperature, relatively good sunlight modulation capability and relatively stable structure and performance.