42 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 method for recovering manganese from manganese-iron alloy waste residues, which comprises the following steps: crushing the manganese-iron alloy waste residues, drying, uniformly mixing the dried manganese-iron alloy waste residues with a binary flux according to a mass ratio of 1: (1.8-2), completely roasting, cooling to room temperature, and taking out a roasted slag sample, thereby obtaining the manganese from the manganese-iron alloy waste residues. Adding deionized water to leach manganese sulfate at room temperature, filtering and separating to obtain a manganese sulfate crude solution; and adding metal manganese powder, ammonium sulfide and a flocculating agent into the manganese sulfate crude liquid, further removing impurities, adjusting the pH value, adding citric acid, and filtering and separating to obtain a manganese sulfate purified liquid. The recovery rate of manganese can reach 99.1% or above, energy consumption is low, operation is easy, impurity removal is thorough, and the obtained product is high in quality.

The invention belongs to the technical field of chemical materials, and particularly discloses a method for preparing lithium sulfide, which comprises the following steps: mixing lithium salt and ammonium sulfide for reaction to obtain lithium sulfide; wherein the lithium salt comprises at least one of lithium hexafluorophosphate, lithium difluorophosphate and lithium tetrafluoroborate. According to the method for preparing the lithium sulfide, the lithium salt and the ammonium sulfide can fully react under the mild condition, the reaction time is short, the reaction yield is high, and meanwhile the purity of the obtained lithium sulfide is high.

The application belongs to the technical field of chemical materials, and specifically discloses a method for preparing lithium sulfide, which comprises the following steps: mixing and reacting lithium salt and ammonium sulfide to obtain lithium sulfide; wherein the lithium salt comprises at least one of lithium hexafluorophosphate, lithium difluorophosphate and lithium tetrafluoroborate. In the method for preparing lithium sulfide, the lithium salt and the ammonium sulfide can be fully reacted under mild conditions, the reaction time is short, the reaction yield is high, and the obtained lithium sulfide has high purity.

The invention discloses a method for treating nickel precipitates in ammonium sulfate solution and belongs to the field of metallurgy and chemical engineering. The method combines free nickel ions into a stable organic nickel complex precipitate by sequentially adopting a combination of pretreatment, ammonium sulfide nickel precipitation, oxidation and complex breaking, and fenammonium nickel solidification, and finally removes the nickel precipitate by simple filtration. The method can effectively prevent the nickel precipitate from dissolving, solves the problem of excessive heavy metal content caused by the dissolution of heavy metal nickel precipitates in ammonium sulfate solution, and makes the salt product of the purified ammonium sulfate solution reach the GB535-1995 superior product quality standard through evaporation and crystallization, thereby improving economic benefits and avoiding environmental pollution, and having high application value.

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.

The invention discloses ammonium sulfide production equipment and a related production process, and relates to the technical field of ammonium sulfide production. The equipment comprises an ammonia water preparation unit, a hydrogen sulfide gas purification unit, a reaction tank and a remote intelligent processing center. The ammonia water preparation unit automatically and uniformly mixes liquid ammonia and water to form ammonia water; ammonia water falls down according to a certain flow under the control of the electric controllable valve and fully reacts with the purified hydrogen sulfide gas in the reaction tank to generate ammonium sulfide. A pressure sensor, a temperature sensor and a hydrogen sulfide concentration sensor are arranged in the reaction tank, and various data are detected in real time and fed back to a remote intelligent processing center. And the remote intelligent processing center feeds back, adjusts and optimizes the production process flow according to the obtained data. According to the technology, heat absorption in the ammonia water generation process and exothermic reaction in the ammonium sulfide generation process are ingeniously utilized at the same time, negative pressure is automatically achieved in the reaction tank, and safe and efficient production of ammonium sulfide is promoted.

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 application belongs to the technical field of standard substance preparation, and particularly relates to a sphalerite standard substance and a preparation method thereof. The preparation method of the sphalerite standard substance provided by the application comprises the following steps: mixing zinc acetate, ammonium sulfide, a multi-element mixed standard solution and water to perform a hydrothermal reaction, so as to obtain mixed sulfides mainly containing zinc sulfide; and performing hot-press sintering on the mixed sulfides mainly containing zinc sulfide, so as to obtain the sphalerite standard substance. The application combines the hydrothermal method and the hot-press method for the first time, and synthesizes a dense, solid and chemically uniform ZnS material, the matrix of which is consistent with the sphalerite crystal structure, the major components of which are consistent, and the element distribution of which is uniform, and the sulfur isotope composition of which is consistent with that of the sphalerite, so that the sphalerite standard substance is suitable for being used as a standard substance for sphalerite sulfur isotope analysis and trace element quantitative analysis.

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 discloses a sulfidation type shift catalyst and a preparation method thereof, and belongs to the technical field of sulfur-tolerant shift catalysts. Since the sulfidation state sulfur-tolerant shift catalyst has oxygen affinity, when it is exposed to an oxygen-containing environment, an exothermic reaction with oxygen occurs, temperature rises until combustion occurs, therefore, the sulfidation state shift catalyst needs to be passivated or pretreated. The carrier component of the application comprises a mixture of alumina, magnesia and titania, the active component comprises cobalt-molybdenum sulfide; and the surface is covered with a protective layer of one or more organic matters of n-heptane, ammonium sulfide and glyceride in any ratio. When used, the sulfidation process is avoided, the catalyst performance is not affected, the method for removing the protective component during start-up is simple, the protective agent has low content and does not affect the subsequent device system, the start-up time of the enterprise can be significantly reduced, and the application has good economic benefits and application prospect.

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 coke oven gas desulfurization, in particular to a wet desulfurization process method and device capable of generating low secondary salt, the process method comprises the following steps: pre-cooling, desulfurization and regeneration, in the pre-cooling step, a pre-cooling tower adopts a filter screen plate, three filler layers and double spray pipes structure, so that the secondary salt can be effectively removed; dust impurities in coal gas are filtered through the rotating filter screen plate, and then the coal gas is in contact with the filler layer through two-stage spray cooling, so that the temperature of the coal gas is accurately cooled to 25 DEG C. By means of the design, the impurities are removed, proper temperature conditions are created for subsequent desulfurization, the reaction efficiency is improved, and the influence of the dust impurities on the pre-cooling efficiency and the desulfurization efficiency is avoided; the coke oven gas wet desulfurization efficiency is greatly improved, the interference of the desulfurization reaction is reduced, the ineffective loss of the catalyst is reduced, and meanwhile, in the desulfurization step, the reaction is promoted to be carried out in the direction beneficial to generation of ammonium sulfide by adjusting the molar ratio of NH3 in ammonia water in the desulfurization tower to H2S in the tower.

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 present application relates to metallurgical solid waste resource utilization technical field, disclose a kind of comprehensive utilization method of sintering machine head ash and steelmaking refining ash.The method provided in the present application, sintering machine head ash and steelmaking refining ash are treated using water washing process, while harmful impurities in the two ash fractions are immersed in aqueous solution and chemical reaction occurs, also through the reaction mechanism of ammonium sulfide solution under oxygen condition to generate sulfur and ammonia water, resources such as sulfur and ammonia water are recovered, effectively avoiding the release of toxic and harmful gases such as H2S and NH3, and the generation of NH4Cl in the recycling process of sintering machine head ash, the whole utilization process has no secondary pollution, realizes the maximum value utilization of metallurgical solid waste ash fraction.

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 invention belongs to the technical field of electromagnetic wave absorbing materials, and particularly relates to a preparation method of a Cu2-xS-SiO2 nano wave absorbing agent with a one-dimensional core-shell structure. The method comprises the following steps: step 1, soaking SiO2 yarns in an ethanol solution of 3-(trimethoxysilyl) propyl methacrylate to obtain surface modified SiO2 yarns, and then soaking the surface modified SiO2 yarns in an ethanol solution of [2-(methylacryloyloxy) ethyl] trimethyl ammonium chloride and potassium persulfate to obtain polymer modified SiO2 yarns; 2, the polymer modified SiO2 yarn is soaked in an ammonium chloropalladate solution, palladium ion modified SiO2 yarn is obtained through ion exchange, then the palladium ion modified SiO2 yarn is soaked in an electroless deposition solution, metal Cu grows on the surface of the SiO2 yarn, and Cu-SiO2 yarn of a one-dimensional core-shell structure is obtained; and 3, soaking the Cu-SiO2 yarn with the one-dimensional core-shell structure in an aqueous solution of ammonium sulfide, carrying out vulcanization reaction, repeatedly washing with deionized water, and drying to obtain the Cu2-xS-SiO2 nano composite material with the one-dimensional core-shell structure.

The invention discloses a preparation method of amorphous iron oxide microspheres for a lithium battery, and relates to the technical field of battery materials, the preparation method comprises the following steps: using ferrous sulfate, liquid ammonia and liquid oxygen as raw materials to produce an iron oxide product which has high purity and high activity and is suitable for manufacturing a lithium iron phosphate battery, and simultaneously co-producing high-quality ammonium sulfate; the method comprises the following steps: (1) purifying ferrous sulfate, namely preparing ferrous sulfate heptahydrate and water into a solution, heating and stirring, adding ammonium sulfide and ammonia water to adjust the pH value of the solution, filtering, removing heavy metal ions, cooling and crystallizing to obtain ferrous sulfate crystals, and dissolving the crystals with pure water to obtain a pure ferrous sulfate solution; (2) preparing a seed crystal; (3) carrying out oxidation crystal growth and composite dephosphorization; and (4) filtering, washing, drying and crushing. According to the technical scheme, the problems that the iron oxide produced by the existing method for producing the iron oxide for the lithium battery has many impurities, the product percent of pass is uncontrollable, and the production efficiency is low are solved.

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 present invention discloses a modification method of a titanium-based lithium ion sieve, using a titanium source and a lithium source as basic raw materials, doping a modifier, wherein the modifier is selected from any one of sulfur powder, thiourea, urea, ammonium sulfide, hexamethylenetetramine, and selenium powder; a modified lithium metatitanate precursor is prepared by solid phase synthesis, sol-gel synthesis, or hydrothermal synthesis. The titanium source is selected from any one of titanium dioxide, industrial metatitanic acid, tetrabutyl titanate, titanium tetrachloride, isopropyl titanate, titanium sulfate, and titanium nitrate. The lithium source is selected from any one of lithium hydroxide, lithium chloride, lithium carbonate, lithium acetate dihydrate, lithium oxalate, lithium fluoride, lithium bromide, lithium nitrate, and lithium sulfate. The modification method of the present invention further improves the adsorption capacity and adsorption rate of the titanium-based lithium ion sieve by doping with non-metallic ions nitrogen, sulfur, or selenium.

This invention discloses a sulfide solid electrolyte, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the sulfide solid electrolyte includes: thermally reacting the raw materials for the preparation of the sulfide solid electrolyte; tangentially filtering the material obtained after the thermal reaction; and spray-drying the solid obtained from the tangential flow filtration. The raw materials include a first precursor, a second precursor, and a solvent. The first precursor includes lithium sulfide, and the second precursor includes at least one selected from phosphorus pentasulfide, silicon sulfide, germanium sulfide, tin sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, calcium sulfide, and arsenic sulfide. This method has a relatively simple process flow and operation, low energy consumption and cost, and high production efficiency, making it suitable for industrial production. The sulfide solid electrolyte obtained in this way is relatively soft, making it easier to contact the positive and negative electrodes under extrusion conditions during the further preparation of the battery, improving density, thereby facilitating electron transport and reducing losses.

The application belongs to the technical field of medicine, and particularly relates to a preparation method of toptipitast, which comprises the following steps: 1) preparing compound 2 by reacting compound 1 with ammonium sulfide in an imidazole aqueous solution; 2) preparing compound 3 by reacting compound 2 with iodomethane under inert gas protection; 3) preparing compound 5 by reacting compound 3, compound 4 and silica gel under microwave irradiation; and 4) preparing toptipitast by reacting compound 5 with trifluoroacetic anhydride. The application has the following beneficial effects relative to the prior art: (1) the reagent used is low in price and has a cost advantage; (2) the use of a highly toxic cyanide reagent is avoided; (3) the operation of post-treatment is simple, the reaction condition is mild, the safety is high, and the method is suitable for commercial production.

This invention belongs to the field of nanomaterial synthesis technology and relates to a method for preparing ultrathin two-dimensional CuS nanosheets with high photothermal conversion efficiency. Using CuCl2·2H2O, ammonium sulfide, oleylamine, or n-octylamine as raw materials, the reaction is carried out at 70-100℃ for 90-180 min. After hydrophilic treatment, monodisperse two-dimensional CuS nanosheets with a thickness of 1.5-2 nm are obtained. These nanosheets exhibit high photothermal conversion efficiency, reaching up to 92±3%.

The invention relates to the field of polluted soil-underground water treatment and remediation, and discloses a remediation agent which comprises the following components in percentage by mass: 20-60% of ammonium polysulfide; 5%-20% of a pH regulating component; 5%-25% of a redox potential control component; the pH regulating component is selected from a phosphate buffer, an acetate buffer, magnesium oxide, calcium carbonate and a combination of the phosphate buffer, the acetate buffer, the magnesium oxide and the calcium carbonate; the oxidation-reduction potential control component is selected from nanoscale zero-valent iron, micron zero-valent iron, slow-release organic acid, ferrous sulfide and a combination of the nanoscale zero-valent iron, the micron zero-valent iron and the slow-release organic acid. By taking ammonium polysulfide as a core reduction component, efficient reduction potential energy can be provided, rapid and thorough reduction of hexavalent chromium in a polluted environment is ensured, the risk that reduced Cr (III) is re-oxidized into Cr (VI) under the change of environmental conditions is fundamentally inhibited, the durability and reliability of the remediation effect are remarkably improved, and secondary pollution is effectively avoided.

The invention discloses a treatment system and method for ammonia dissolving slag in the process of producing ammonium paratungstate through alkaline extraction, and relates to the technical field of tungsten smelting, the treatment system comprises a rotary roasting furnace, an ammonia dissolving preparation kettle, an ammonia dissolving reaction kettle, a plate-and-frame filter press and an ammonium sulfide elevated tank, the device comprises a thiolation preparation tank, an aging reaction kettle, a molybdenum removal resin column, a pure ammonium tungstate storage tank, an APT continuous evaporation crystallizer, an APT crude separation continuous evaporation crystallizer, an alkali extraction box and a strip liquor storage tank, the method comprises the following specific steps: S1, roasting; s2, ammonia dissolution; s3, molybdenum removal; s4, evaporative crystallization; and S5, performing coarse separation, evaporation and crystallization. The system disclosed by the invention is highly matched with an APT main production process, the recovery rate of valuable metals in the ammonia dissolving slag is improved, harmful impurities such as carbonized organic phases are removed after the ammonia dissolving slag is roasted by adopting a specific process method, and most of metal impurities can be removed through ammonia dissolving reaction, so that the ammonia dissolving slag can be used for producing a national standard 0-grade product APT.

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 invention belongs to the technical field of sulfurized isobutylene production. The preparation method comprises the following steps: adding clear water and sulfur, introducing liquid ammonia and hydrogen sulfide, controlling the temperature not to exceed 65 DEG C, and reacting to generate ammonium polysulfide; the method comprises the following steps: mixing ammonium polysulfide and isobutene according to a preset proportion, reacting to generate a crude mixed solution mainly containing sulfurized isobutene, and controlling the temperature to be 150-220 DEG C; the mixed solution is subjected to standing layering, mother liquor obtained after standing layering is used for synthesizing ammonium polysulfide, and an oil layer is washed with water 1-2 times; distilling the washed oil layer to obtain a sulfurized isobutylene crude product; adding the sulfurized isobutylene crude product into a sodium sulfide solution for soda boiling at the temperature of 80-140 DEG C, adding the desulfurization particles in the soda boiling process, stirring to remove sulfur, and then standing for layering; and washing the oil layer with water, and then rectifying and filtering to obtain a sulfurized isobutylene product. The invention also provides a production system for synthesizing the low-odor sulfurized isobutylene by the high-pressure method.

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.