19 results about "Sulfur product" patented technology

The invention discloses a catalytic electrode which comprises a substrate, and an anti-corrosion layer and a sulfur-phobic layer which are sequentially attached to the substrate, the substrate is a blank foamed nickel substrate, the anti-corrosion layer is formed by dipping the foamed nickel substrate with a ferric salt solution, and the sulfur-phobic layer is formed by processing a precursor with a cobalt salt solution through electro-deposition. Accordingly, a corresponding preparation method is also established, a blank foamed nickel substrate is adopted, firstly, the foamed nickel substrate is subjected to dipping treatment with an iron salt solution to obtain a precursor with an anti-corrosion layer, and then the precursor is subjected to electro-deposition treatment with a cobalt salt solution to form the sulfur-phobic layer on the anti-corrosion layer. Wherein the anti-corrosion layer can isolate a high-sulfur environment and prevent the substrate from being corroded; the sulfur phobic layer may prevent sulfur products from depositing and passivating the electrode. The catalytic electrode provided by the invention solves the problems of sulfur reaction corrosion and passivation, shows excellent catalytic activity and stability, and can be used for catalyzing sulfur oxidation reaction for a long time. In conclusion, the method has the advantages of mild conditions, simple process, economy and practicability, and has obvious large-scale industrial production potential.

The utility model discloses a sulfur powder collecting device with a cleaning function, and relates to the technical field of sulfur product processing, the sulfur powder collecting device with the cleaning function comprises a support frame, a separator main body and a collecting assembly; the separator main body is mounted on the support frame; the collecting assembly is communicated with an inlet of the separator main body; wherein a liquid cooling device is arranged on the outer surface of the separator main body, a cleaning device is arranged in the separator main body, and a collecting hopper is arranged at the lower end of the separator main body; according to the technical key points, the liquid cooling device and the cleaning device are installed on the separator body, the liquid cooling device can achieve cooling of sulfur powder in the machining process and reduce the risk, the liquid cooling device is matched with the cleaning device, the sulfur powder attached to the inner wall of the separator body can be flushed down, leakage of the sulfur powder is avoided, and therefore the content of the sulfur powder in air is effectively reduced; the safety is higher, the using effect is good, and the good using prospect is achieved.

This invention discloses a transition metal phosphide catalyst, its preparation method, and its application, belonging to the field of electrocatalysis technology. The process includes: firstly, dissolving nickel salt, lanthanum salt, urea, and ammonium fluoride in deionized water to synthesize a nickel-lanthanum layered hydroxide nanosheet precursor via a hydrothermal method; secondly, preparing a lanthanum-doped nickel phosphide catalyst using a phosphating reaction; and thirdly, utilizing a lanthanum doping strategy to modulate the electronic structure of nickel phosphide and improve its electrocatalytic reaction performance. This lanthanum-doped nickel phosphide material exhibits good catalytic activity when used to catalyze hydrogen evolution and sulfide ion oxidation reactions. In an integrated two-electrode electrolyzer for sulfide ion oxidation-assisted hydrogen production, it outputs 10 mA cm⁻¹. ‑2 This invention achieves the goal of producing hydrogen and high-value-added sulfur products with low energy consumption by requiring a relatively low voltage of 0.525 V at a current density. It has advantages such as simple preparation process, controllable operating conditions, and low raw material costs, possessing the potential for large-scale production and serving as a high-performance catalyst for electrocatalytic hydrogen production and sulfur ion oxidation reactions.

A smelting method of ultra-low nitrogen steel comprises the following steps: (1) pretreatment of molten iron: carrying out deep desulfurization on the molten iron by adopting a KR method until S is less than or equal to 0.0020 wt% and S in a steel ladle after tapping is less than or equal to 0.0012 wt%; (2) converter smelting, wherein Ar gas bottom blowing stirring is adopted in the whole process; (3) LF refining is conducted, the bottom blowing gas flow at the initial stage of refining is smaller than or equal to 3.0 Nl / (min.t steel), and the electrode electrifying power is smaller than or equal to 70 kW / t steel; the bottom blowing gas flow is smaller than or equal to 7.0 Nl / (min.t steel) in the later stage of electrification, and the electrification power is smaller than or equal to 130 kW / t steel; 4-10 kg of active lime is added to each ton of steel, and the content of CaO in ladle top slag is controlled to be 50-55 wt% after LF refining is finished; and (4) RH refining: starting a vacuum pump of an RH refining furnace for exhausting, before the pressure in a vacuum chamber is reduced to 1kPa, controlling the flow of circulating gas to be 6-8N1 / (min.t steel), reducing the pressure in the vacuum chamber to be less than or equal to 1kPa, and increasing the flow of the circulating gas to be 10-12N1 / (min.t steel). According to the method, on the premise that the sulfur content of the molten steel is smaller than 20 ppm and the smelting cost is not increased, the ultralow-nitrogen and ultralow-sulfur product with the nitrogen content smaller than 30 ppm can be obtained.

This invention discloses a compound additive and its application in removing corrosive sulfur from mineral insulating oil, relating to the field of insulating oil additives. It includes a first inhibitor, a second inhibitor, a first antioxidant, and a second antioxidant. The first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methylbenzotriazole. The first antioxidant is pyrogallol, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. This additive uses a compound inhibitor and a compound antioxidant. When applied to mineral insulating oil, the synergistic effect of the compound inhibitor improves the insulating oil's resistance to corrosive sulfur. Simultaneously, the compound antioxidant and compound inhibitor are balanced to maximize the insulating oil's oxidation resistance, providing continuous and efficient protection for mineral insulating oil in actual operation, resulting in excellent physical and electrical properties.

This invention proposes a sulfur purification method combining continuous flow solid-liquid separation and low-temperature sublimation, comprising: S1, physically crushing sulfur raw materials into sulfur particles, placing the sulfur particles in a cleaning solution for ultrasonic cleaning to obtain cleaned sulfur particles; wherein, the cleaning solution is an aqueous solution including at least one cleaning agent selected from sodium carbonate, EDTA, citric acid, phosphate, and silicate; S2, continuously countercurrently immersing the cleaned sulfur particles with an immersion solution, followed by solid-liquid separation to obtain solid sulfur after solid-liquid separation; S3, sublimating the solid sulfur after solid-liquid separation into sulfur vapor at a temperature of 80–110°C and a vacuum of 0.01–10 Pa; S4, condensing the sulfur vapor to obtain solid sulfur. This sulfur purification method effectively reduces energy consumption during the purification process, reduces environmental pollution, and significantly improves the purity of sulfur products, greatly enhancing the energy utilization rate and environmental performance of the entire production process.

The invention discloses an oil and gas field sewage desulfurization method, and relates to the field of oil and gas field sulfur-containing sewage treatment. Comprising the following steps: adjusting the pH value of the sulfur-containing sewage to 8.0-9.0, and adding a sulfur particle regulating agent; adding a composite complex iron catalyst into the treated sewage, and carrying out catalytic oxidation reaction under the condition that the concentration of dissolved oxygen is controlled to be 2-8mg / L; adding an air flotation separating agent to separate the generated sulfur particles from the water phase to obtain sulfur-enriched foam and desulfurization sewage; a redox regulator is added into the separated desulfurization sewage, and the activity of the catalyst is recovered by controlling the redox potential within the range of 150-250 mV; and a flocculating agent and a pH regulator are added, so that the treated water quality reaches the discharge standard. According to the method, sulfide in the high-concentration sulfur-containing sewage can be stably reduced to 0.5 mg / L or below, the desulfurization efficiency far exceeds 99.9%, the purity of a sulfur product is larger than or equal to 99.5%, the treatment effect is stable and reliable, and the sulfur recovery rate is larger than or equal to 93.2%.

The invention belongs to the field of daily chemicals, and discloses a preparation method of colloidal sulfur, which specifically comprises the following steps: mixing sulfur-containing dispersoid with Arabic gum and water-soluble oat flour, grinding to obtain a ground product, and freeze-drying or drying the ground product under reduced pressure. According to the method, Arabic gum and water-soluble oat powder are adopted as composite coating materials for coating, a colloidal sulfur product with the D50 particle size of 4.5-10 microns can be obtained through grinding and a drying process, and compared with a traditional colloidal sulfur product, the colloidal sulfur product is better in coating stability, higher in coating rate, lower in irritation and capable of better achieving the effects of removing oil, controlling acnes, removing dandruff and controlling oil. Meanwhile, the invention also discloses application of the colloidal sulfur.

The invention provides a combined membrane method resourceful treatment device and process for a desulfurization solution, and belongs to the technical field of industrial wastewater treatment. The device comprises a plate-and-frame filter press, a homogeneous membrane / reverse osmosis membrane, a nanofiltration membrane, an activated carbon decoloration tank, an evaporator, a first cooling pelleter, an ultrasonic-assisted ozone centrifugal reactor, a sulfur melting kettle, a second cooling pelleter, an ultrafiltration membrane and a bipolar membrane. By means of the synergistic effect of ultrasonic cavitation and ozone oxidation, thiosulfate is efficiently decomposed, elemental sulfur is directionally generated, and a high-quality sulfur product is obtained by matching with refining of the sulfur melting kettle; meanwhile, thiocyanate and sulfate / thiosulfate are accurately separated through a nanofiltration device, a high-purity thiocyanate product is produced through activated carbon decoloration and evaporation concentration, then bipolar membrane electrodialysis is used for directly converting sulfate into recyclable acid and alkali, various high-value resources are systematically recycled, and the method is suitable for industrial production. The problems of low resource recovery rate and insufficient product purity of the traditional process are solved.

The invention discloses a continuous production process of high-dispersity insoluble sulfur, and particularly relates to the technical field of chemical engineering. The process comprises the following steps: calcining pyrite under an oxygen-enriched condition to generate sulfur dioxide, and converting the sulfur dioxide into a sodium sulfite solution; adding excessive elemental sulfur into the solution to generate a polysulfide precipitate; collecting hydrogen sulfide gas and active sulfur while performing acidolysis precipitation; hydrogen sulfide and sulfur dioxide are mixed in proportion, and high-purity sulfur is regenerated through catalysis of gamma-aluminum oxide; mixing the regenerated sulfur with active sulfur, and carrying out high-temperature gasification polymerization at 700-750 DEG C under the protection of nitrogen; then the sulfur steam is in countercurrent contact with low-temperature water mist through a granulation tower and is rapidly cooled and solidified into fine particles; and finally performing vacuum drying to obtain a finished product. Through material circulation and process integration, sulfur source activation, long-chain polymer structure directional regulation and control and accurate control of particle morphology are realized. The obtained insoluble sulfur product has high insoluble content, fine and uniform particle size and excellent thermal stability.

The utility model discloses sulfur product transfer equipment, and relates to the technical field of sulfur product processing, the sulfur product transfer equipment is applied to transportation of sulfur particles in a production workshop, the sulfur product transfer equipment comprises a conveying track, a transfer trolley, a storage box body, a feeding assembly and a discharging pipe fitting, the conveying track is arranged on the ground of the production workshop; the transfer trolley is arranged on the conveying track and runs along the conveying track; the storage box body is fixedly mounted on the transfer trolley; the feeding assembly used for being connected with a discharging pipe of sulfur particle processing equipment is installed at the position, close to one side, of the upper end face of the storage box. The discharging pipe fitting is installed on the side end face, away from the feeding assembly, of the storage box. According to the technical key points, safe storage and conveying of sulfur particles can be achieved, the safety of sulfur product processing is guaranteed, pipeline connection is convenient during feeding and discharging, and the sulfur particle conveying device can be suitable for processing equipment with different heights and different inclination angles, is high in applicability and good in using effect and has a good using prospect.

This invention discloses a method for recovering high-purity sulfur from hydrometallurgical zinc slag. The method involves washing, drying, grinding, and sieving the hydrometallurgical zinc slag, then mixing it with a water-ethylene glycol solvent and adjusting the pH to the range of 2-10. The mixture is then transferred to a high-pressure reactor for a solvothermal reaction under mechanical stirring. After the reaction is complete, the mixture is cooled to room temperature, and the solid product is separated by water washing to obtain sulfur-rich slag and metal-enriched residue. The sulfur-rich slag is then physically cut to remove surface impurities, yielding the high-purity sulfur product. This method combines high-pressure solvothermal reaction with physical cutting to separate sulfur from metallic impurities in hydrometallurgical zinc slag, obtaining a high-purity sulfur product. This reduces the accumulation of sulfur-containing waste and the loss of sulfur resources. Furthermore, this method is simple, economical, and efficient, providing a new approach for the treatment of sulfur-containing waste.

The invention discloses a pyrite sulfur product recovery device, and relates to the technical field of pyrite recovery devices, the pyrite sulfur product recovery device comprises a bottom plate, the top of the bottom plate is provided with a grinding assembly used for grinding a pyrite sulfur product into powder, and one side of the grinding assembly is fixedly communicated with a crushing assembly used for crushing pyrite sulfur product particles. According to the pyrite sulfur product recovery device, the grinding assembly is arranged, the motor drives the worm to rotate through the output shaft, the worm is in meshing transmission with the turbine, the second rotating shaft is directly driven to rotate, power of the grinding assembly is synchronously transmitted to the crushing assembly, and when the second rotating shaft rotates, on one hand, the crushing assembly is driven to operate in order; two-stage crushing of the pyrite is completed; and on the other hand, a grinding roller and a grinding plate of the grinding assembly work synchronously, and the crushed pyrite particles can directly enter the grinding assembly to be ground through a communication channel between a crushing box and a cylindrical plate.

The utility model discloses a weighing device for sulfur product proportioning, and relates to the technical field of sulfur weighing, the weighing device comprises a weighing hopper, a fixing ring frame, a weighing device and a switching sealing plate, a lap joint ring is processed on the outer wall of the middle of the weighing hopper, a rotary actuator is connected to the center of the switching sealing plate in an assembled mode, a circular truncated cone sleeve is coaxially arranged at the bottom of the weighing hopper, and the circular truncated cone sleeve is connected with the rotary actuator in an assembled mode. A C-shaped groove is machined in the circular truncated cone sleeve, an erecting platform is assembled at the bottom of the fixing ring frame, and a plurality of guide vertical rods are integrally formed at the top of the fixing ring frame; according to the technical key points, a lap joint circular ring is machined on the outer wall of a weighing hopper, a plurality of weighing devices are arranged between a fixed ring frame assembled at the top of an erecting platform and the lap joint circular ring, sulfur fed into the weighing hopper can be weighed, and when a rotary actuator controls a switching sealing plate to rotate and the edge of the switching sealing plate is separated from the bottom of the weighing hopper, the weighing devices can be switched to the lap joint circular ring. Sulfur can be completely released to the bottom, and the situation that the sulfur remains in a connecting area of the weighing hopper and the switching sealing plate is avoided as much as possible.

The invention provides a material suitable for hydrogen sulfide adsorption catalysis and a preparation method and application thereof. The preparation method sequentially comprises the steps of biomass-based porous carbon carrier preparation, copper-iron double-metal gradient doping, in-situ reduction, active site construction and powder forming. Firstly, a biomass raw material and a sodium alginate pore-forming agent are adopted to synergistically prepare hierarchical porous carbon, the specific surface area is large, the hierarchical pore structure can simultaneously meet the requirements for rapid diffusion of H2S and efficient storage of sulfur products, and the problem of sulfur blockage is solved. Secondly, through gradient doping, dispersing agent regulation and control and in-situ reduction processes, active sites are fully exposed, and the H2S penetration capacity is large; moreover, weak-medium alkaline sites are formed through adjustment of K2CO3, H2S dissociation is promoted, sulfate side reaction is inhibited, and the sulfur selectivity exceeds 95%.

The application discloses a method for filtering and separating sulfur in metal sulfur residue and preparing polymerized sulfur, and the method comprises the following steps: pretreating the metal sulfur residue by acid immersion, water washing, dehydration and melting to obtain molten metal sulfur residue; adding viscosity regulators (thiazole substances and guanidine substances) into the molten metal sulfur residue, stirring and reacting, and then performing pressure filtration separation to obtain sulfur liquid; adding polymerization regulators (thiazole substances, thiuram substances, sulfenamide substances and guanidine substances) into the sulfur liquid to perform polymerization, and then adding polymerized sulfur capping agents to perform capping to obtain polymerized sulfur liquid; and cooling the polymerized sulfur liquid in ice water to obtain polymerized sulfur products. The method can realize viscosity reduction of the molten metal sulfur residue by using special viscosity regulators, improve the separation rate of sulfur and metal impurities in the metal sulfur residue, obtain high-purity sulfur liquid, and control liquid sulfur polymerization by using polymerized sulfur regulators to obtain high-molecular-weight polymerized sulfur products with high yield.

The present application relates to the technical field of sulfur recovery, and specifically discloses a high-efficiency sulfur recovery method. The method comprises the following steps: introducing acid waste gas containing hydrogen sulfide into an absorption tower, performing primary spray absorption and secondary strengthening absorption on the hydrogen sulfide by using a composite desulfurization absorption liquid, and forming a desulfurization rich liquid; then sending the desulfurization rich liquid into a regeneration tank, introducing air into the regeneration tank to perform oxidation regeneration, and obtaining a sulfur-containing slurry; subsequently, recovering a sulfur product after sulfur precipitation enrichment, solid-liquid separation, dehydration and drying, returning the separated liquid to be recycled, and discharging tail gas after polishing treatment. The composite desulfurization absorption liquid comprises liquid alkali, modified pseudo-boehmite slurry, iron-based catalytic mother liquor, an interface regulator, an organic silicon defoaming agent and deionized water. The recovery method has the advantages of high desulfurization efficiency, high sulfur recovery rate and good running stability.

The invention discloses a method and a device for removing organic sulfur in natural gas, and relates to the technical field of natural gas purification and sulfur recovery. The removal method comprises the following steps: taking natural gas containing hydrogen sulfide and mercaptan as raw material gas, and removing hydrogen sulfide in the raw material gas through an alcohol amine method to obtain first hydrogen sulfide removed gas and first amine-rich liquid; continuously carrying out temperature swing adsorption on the first hydrogen sulfide removed gas to remove mercaptan, so as to obtain purified gas and mercaptan-rich gas; removing hydrogen sulfide from the mercaptan-rich gas through catalytic hydrogenation and an alcohol amine method, and hydrolyzing to convert COS into hydrogen sulfide to obtain hydrogen sulfide-containing gas; and the hydrogen sulfide-containing gas returns to the feed gas inlet for circulation. The method can overcome the defects of large solution circulation amount and high energy consumption when the traditional alcohol amine method is used for treating the natural gas with high H2S and mercaptan content; the problems of unstable operation of a subsequent sulfur recovery device and poor quality of a sulfur product caused by mercaptan are solved; meanwhile, hydrogen consumption in the technological process is reduced, the total investment of the device is reduced, and finally deep desulfurization of the high-sulfur-content natural gas is achieved.

The invention provides a process method for preparing sulfur from mirabilite, and relates to the technical field of sulfur production and carbon emission reduction, and the process method comprises the following steps: with C or CO as a fuel, preheating mirabilite, adding the preheated mirabilite into a three-blade closed reduction rotary kiln, and calcining at 900-1050 DEG C to obtain liquid Na2S; enabling the liquid or solid Na2S calcined in the step S1 and solid CaCO3 to enter a multi-phase reactor for reaction; performing solid-liquid separation on the slurry after the reaction in the step S2, wherein the filter residue is CaS and the filtrate is a Na2CO3 solution; the gas phase obtained after calcination in the step S1 enters a CO2 trapping system, and then flue gas is discharged after being subjected to desulfurization, denitrification and dust removal; the filter residues obtained in the step S3 and the CO2 captured in the step S4 are fed into a supergravity carbonization reactor, the obtained solid phase is CaCO3, and the obtained gas phase is H2S; the solid-phase CaCO3 is returned to the multi-phase reactor of S2 for recycling; h2S enters a Claus reaction system, and finally a sulfur product is obtained. According to the method, sulfur in the low-quality mirabilite is converted into sulfur; in the production process, CaCO3 can be recycled only through one-time feeding, and resources are saved.