293results about "Sulfur preparation/purification" patented technology

This invention belongs to the field of catalyst technology, specifically relating to a selective reduction catalyst for the production of sulfur from sulfur dioxide and its application method. The selective reduction catalyst for sulfur production from sulfur dioxide contains 1-2 wt% cobalt (CoO), 4-10 wt% molybdenum (MoO3), and 2-4 wt% zinc (ZnO), with TiO2-Al2O3 as the support. This invention exhibits good wide-temperature reaction performance, heat resistance, and water vapor resistance; the single-pass yield of elemental sulfur is higher than 80%, and the reaction process has high efficiency, showing promising application prospects.

The invention belongs to the technical field of preparation of sulfur, and particularly relates to a process for producing sulfur from sulfur dioxide. The SO2 introduced by the sulfur dioxide gas flow is selectively reduced into elemental sulfur by using hydrogen introduced by the hydrogen flow under the temperature condition of 160-320 DEG C through one or more reaction devices; each reaction device is provided with one or more selective reduction reactors which are connected in series, one or more catalyst bed layers are arranged in each selective reduction reactor, and each catalyst bed layer is filled with a selective reduction catalyst. The method is simple in process reaction, short in flow and high in efficiency, products except sulfur are water or basically water, and the method has a certain application prospect.

The invention belongs to the technical field of catalysts, and particularly relates to a selective reduction catalyst for preparing sulfur from sulfur dioxide and an application method of the selective reduction catalyst. The selective reduction catalyst for preparing sulfur from sulfur dioxide contains 1-2wt% of cobalt (in terms of CoO), 4-10wt% of molybdenum (in terms of MoO3) and 2-4wt% of zinc (in terms of ZnO), and a carrier is TiO2-Al2O3. The method has good wide-temperature reaction performance, heat resistance and water vapor resistance, the single-pass yield of elemental sulfur is higher than 80%, the efficiency of the reaction process is high, and the method has good application prospects.

The embodiment of the utility model provides zero-emission methanol preparation equipment based on garbage gasification and water electrolysis. The equipment comprises a water electrolysis hydrogen production unit, a garbage gasification unit, a first methanol synthesis unit, a second methanol synthesis unit and a gas separation unit, the water electrolysis hydrogen production unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the gas separation unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the water electrolysis hydrogen production unit generates hydrogen and oxygen through electrolysis; the garbage gasification unit is used for carrying out gasification reaction by using oxygen provided by the water electrolysis hydrogen production unit to prepare synthesis gas containing carbon monoxide, carbon dioxide and hydrogen; the gas separation unit is used for separating carbon monoxide, carbon dioxide and hydrogen in the synthesis gas introduced from the garbage gasification unit, the carbon monoxide and the hydrogen are introduced into the first methanol synthesis unit, and the carbon dioxide is introduced into the second methanol synthesis unit for preparing methanol respectively.

The invention relates to the technical field of sulfur recovery, in particular to sulfur recovery equipment and a recovery method thereof.The sulfur recovery equipment comprises a recovery box, a reaction box is arranged on the recovery box, an air outlet is formed in the reaction box, an air inlet pipe is arranged on the side wall of the reaction box, lifting mechanisms are arranged in the recovery box and the reaction box, and a spraying mechanism is arranged on the reaction box; and a centrifugal mechanism is arranged in the recycling box. According to the device, the lifting mechanism and the cleaning mechanism are matched, so that the atomizing nozzle can be rotationally cleaned during up-and-down movement, particles are effectively prevented from being blocked at the atomizing nozzle, a desulfurizing agent can be uniformly and smoothly sprayed, and the sulfur recovery efficiency and quality are improved; by arranging the centrifugal mechanism, under the action of centrifugal force, liquid is discharged through the drainage pipe, solid is discharged through the drainage groove, effective separation of the solid and the liquid is achieved, the treatment efficiency and quality are improved through the solid-liquid separation mode, the solid and the liquid can be conveniently and intensively treated in a distinguished mode, and further recycling of resources is facilitated.

The application discloses a kind of functionalized nano sulfur preparation and its application in wound repair.The application uses PEG200 and elemental sulfur as reaction raw materials, does not introduce other organic solvents, is prepared by muffle furnace gradient heating mode at 30-70 DEG C safe reaction temperature, and obtains the spherical nano sulfur of 50-100nm particle size, has certain repair effect to normal mouse wound and diabetic refractory wound, and does not cause toxicity in vivo, with higher biological safety.Therefore, it can be used for wound repair, especially refractory wound repair.

The invention discloses a preparation method of a catalyst for catalytic reduction of SO2 by CO in an oxygen-containing atmosphere, and belongs to the technical field of atmospheric pollution purification. According to the catalyst, base metals such as Fe and Cu are adopted to modify supported metal sulfide, active components of the supported metal sulfide comprise FeS, CoS2, CuS and the like, and common metal oxides such as cerium oxide, titanium oxide, aluminum oxide and the like are selected as carriers. The catalyst not only has strong SO2 catalytic reduction performance and high stability in an oxygen-containing atmosphere, but also is simple in preparation process, wide in raw material source and low in cost, has remarkable economical efficiency and environmental protection benefits, has a wide application prospect in the field of air pollution purification, and has important significance in reducing SO2 emission and improving air quality. The embodiment shows that when the oxygen volume content of the Fe elementary substance modified supported metal sulfide composite catalyst is 5%, the SO2 conversion rate is 97.9%, and the sulfur yield is 90.6%.

The invention belongs to the field of preparation of high-end carbon materials, and relates to a method for desulfurizing high-sulfur petroleum coke. The core of the invention is to construct a'desulfurization-acidification-regeneration 'three-step closed cycle system. The system takes magnesium oxide as a circulating medium, firstly magnesium oxide reacts with sulfur in petroleum coke at a high temperature to be converted into magnesium sulfide, then sulfur is released and recovered through an acidification step, meanwhile magnesium is converted into an intermediate product magnesium hydroxide, and finally, the magnesium medium is recovered to be active through a thermal regeneration step, magnesium oxide is obtained, and circulation is completed.

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.

The invention discloses a high-concentration sulfate acid pit water treatment method based on an acid-resistant SRB biological cathode, which comprises the following steps: enabling acid pit water to pass through a grid and then enter a regulating reservoir; introducing the wastewater in the regulating tank into a biological membrane electrochemical device for electrochemical reaction; oxidizing Fe < 2 + > in the wastewater into Fe < 3 + > on a titanium-based IrO2 anode plate and releasing electrons in an anode chamber; in the cathode chamber, an acid-resistant SRB bacterial film loaded on the surface of the carbon felt electrode reduces SO4 < 2-> into S < 2-> by utilizing transferred electrons; cO2 microbubbles are introduced into the liquid in the cathode chamber to react with S < 2-> to generate sulfur precipitates, and the reacted mixed liquid enters a cyclone separator to realize gas-solid separation; and carrying out hydrolysis reaction on Fe < 3 + > in the effluent of the anode chamber to generate Fe (OH) 3 precipitate, mixing the Fe (OH) 3 precipitate with sodium silicate, and calcining to convert the mixture into magnetic alpha-Fe2O3. The method can effectively remove SO4 < 2-> and recover iron sludge.

Systems and methods for minimizing fuel consumption in an incinerator system in a sulfur recovery unit (SRU), including obtaining input gas flow data for streams entering the incinerator system of the SRU. Systems and methods also include making a determination of whether the SRU is operated with a tail gas treatment unit (TGTU), selecting a first relationship in response to the determination that the SRU is not operated with the TGTU and otherwise selecting a second relationship. Systems and methods further include determining an optimal incinerator system temperature based on the input gas flow data and using the first or the second relationship, determining, based on the optimal incinerator system temperature, an optimal flow rate of a fuel gas used in the incinerator system, and adjusting a fuel gas flow rate to the optimal flow rate of the fuel gas.

The present application belongs to the technical field of fine chemical industry, and relates to a recycling method of accelerator M tar. In the waste M tar produced in M production, a catalyst is added, high-temperature decomposition is carried out under nitrogen protection, and recycled raw materials aniline, carbon disulfide and intermediate benzothiazole and the like are obtained, most of which are recycled. The present application adopts common equipment and unit operations, the catalyst can be reused, and the treatment of production waste is easy to realize industrial production.

The invention discloses a preparation method of nano sulfur, which comprises the following steps: (1) adding 5-10 g of sublimed sulfur and 50 mL of N-methyl pyrrolidone into a 300 mL round-bottom flask, then placing the round-bottom flask in an oil bath at 25-125 DEG C, and stirring for 15-60 min; and (2) filtering the mixture to take filtrate, then adding the filtrate into a 300 mL beaker, adding 100-200 mL of deionized water into the beaker at one time at normal temperature under vigorous stirring, and continuously stirring for 5-10 minutes. And (3) centrifugally separating the mixture at 8000-12000 rpm for 5-10 min or filtering the mixture to obtain a precipitate, and washing the precipitate with deionized water for 3 times. And (4) placing the washed precipitate in a vacuum drying box at 80 DEG C, and drying for one night to obtain the nano sulfur. Researches show that sublimed sulfur is taken as a raw material, N-methyl pyrrolidone is taken as a solvent, deionized water is taken as a titration solvent, nano sulfur is prepared by adopting a heterogeneous titration method, and the method is simple in process, easy to operate, easy in condition control, low in synthesis cost and suitable for industrial large-scale production.

This invention provides a sulfur recovery device. The sulfur recovery device includes a reaction section having a first reaction chamber and a first inlet, a second inlet, and a product outlet communicating with the first reaction chamber; a feeding section including a first air inlet pipe configured to introduce hydrogen sulfide gas into the first reaction chamber via the first inlet; an air inlet section for supplying air to the second inlet; a sulfur collection section including a receiving structure and a first collection pipe communicating with the product outlet; and an air distribution ratio adjustment section including a controller and a temperature detection component. The temperature detection component is disposed on the first air inlet pipe and is controlled by the controller, which is also controlled by the air inlet section to control the air flow rate supplied by the air inlet section to the second inlet. The technical solution of this invention solves the problem in existing sulfur recovery devices that affect the air distribution ratio adjustment.

The application discloses a high-concentration sulfate radical acid mine water treatment method based on acid-resistant SRB biological cathode, which comprises the following steps: after the acid mine water is filtered through a grid, the acid mine water is fed into an adjusting tank; the wastewater in the adjusting tank is fed into a biological membrane electrochemical device to perform an electrochemical reaction; in an anode chamber, Fe 2+ in the wastewater is oxidized into Fe 3+ and releases electrons; in a cathode chamber, the acid-resistant SRB bacterial membrane loaded on the surface of a carbon felt electrode utilizes the transmitted electrons to reduce SO4 2‑ into S 2‑ ; CO2 micro-bubbles are fed into the liquid in the cathode chamber to react with S 2‑ to generate sulfur precipitate, and the mixed solution after the reaction is fed into a cyclone separator to realize gas-solid separation; Fe 3+ in the water in the anode chamber generates Fe(OH)3 precipitate through a hydrolysis reaction, the Fe(OH)3 precipitate is mixed with sodium silicate, and is calcined to be converted into alpha-Fe2O3 with magnetism. The method can effectively remove SO4 2‑ and recover iron mud.

A system includes a first chamber, a second chamber, an ultraviolet light source and a microwave source. The first chamber includes an inlet. The second chamber is adjacent the first chamber and includes an outlet and a waveguide. The ultraviolet light source resides within the waveguide of the second chamber. Related apparatus, systems, techniques and articles are also described.

The present invention relates to a pesticidal composition comprising elemental sulphur, flupyradifurone; and at least one agrochemically acceptable excipient. The invention particularly relates to a pesticidal composition comprising elemental sulphur in the range of 1%w / w to 95% w / w of the total composition; flupyradifurone present in the range of 0.01% to 70% w / w of the total composition; and at least one agrochemically acceptable excipient. The composition comprises particles in the size range of 0.1 micron to 50 microns. The present invention also relates to process of preparation of the pesticidal composition. The invention relates to a method of treating a plant, crop, plant propagation material, locus or parts thereof, a seed, seedling or surrounding soil with a pesticidal composition.

Methods and systems are described for the synthesis of carbon nano onions and other materials from carbon precursors. Embodiments include systems and processes for producing CNOs also known as carbon onions or multi-layered fullerenes, from an unrecyclable gas or materials containing a carbon source, in a molten metal or metal alloy bath as well as the CNOs produced therefrom. Various embodiments may utilize a molten aluminum or molten aluminum alloy bath. Certain embodiments utilize a molten aluminum bath as the reactant. Nitrogen can be either vented to the atmosphere or captured.

A system for photocatalytic conversion includes a flowline, in which a production flow travels in a flow direction; and a reactor module. The reactor module includes a waveguide; a photocatalyst coupled to the waveguide, configured to convert hydrogen sulfide in the production flow to hydrogen and sulfur; a heater configured to heat a bottom of the reactor module, such that the sulfur is in liquid phase; and a sulfur collector configured to collect the sulfur. A method for photocatalytic conversion includes introducing a production flow from a flowline to a reactor module, the production flow including hydrogen sulfide and traveling in a flow direction; directing a light from a light source to a photocatalyst through a waveguide; converting the hydrogen sulfide into hydrogen and sulfur using the photocatalyst; and heating a portion of the reactor module to an elevated temperature, the sulfur in a liquid phase under the elevated temperature.

A method can include performing a series of reactions in a closed cycle, the series of reactions consisting of a hydrolysis reaction where a redox reagent is oxidized to a corresponding oxidized redox reagent with water contemporaneously with the production of hydrogen; and a reduction reaction where the oxidized redox reagent is reduced to the redox reagent using a sulfurous reactant contemporaneously with production of sulfur dioxide.

The invention relates to the technical field of preparation of elemental sulfur, and particularly discloses a solvent method for preparing elemental sulfur from hydrogen sulfide and sulfur dioxide. According to the solvent method, hydrogen sulfide and sulfur dioxide are introduced into a mixed solution of 2-acetylthiophene and 2-phenylthiophene at the temperature of 120-150 DEG C for a neutralization reaction, and elemental sulfur is generated. According to the invention, a mixed solution of liquid 2-acetylthiophene and 2-phenylthiophene is used as a reaction medium, and hydrogen sulfide and sulfur dioxide react to generate sulfur and water. The carbonyl oxygen atom of the 2-acetylthiophene and the sulfur atom on the thiophene ring have certain electron donating ability, and have certain catalytic action on the reaction. The 2-phenylthiophene is high in boiling point, stable in property and capable of well dispersing and conveying the liquid sulfur, and after standing, a mixed solution of the 2-acetylthiophene and the 2-phenylthiophene is easily layered from the liquid sulfur, so that the elemental sulfur is easily separated out. Compared with a traditional Claus process, the solvent method in the scheme has the advantages that the solvent is used as a reaction medium, and the problem of sulfur blockage is not easily generated.

The invention relates to the preparation of sulfur suspension, in which molten sulfur is atomized and the resulting atomized sulfur droplets are incorporated in a dispersion medium. In the process the formation of atomized sulfur droplets is separated in space and time from their incorporation. The invention also relates to the sulfur suspension produced, as well as the atomizing-suspending device used for the preparation of sulfur suspension and the rotary disc used in the atomizing-suspending device.

The purpose of this invention is to provide a novel sulfide-based active material that improves cycle characteristics, an electrode (i.e., a positive or negative electrode) having said sulfide-based active material, and a lithium-ion secondary battery having said electrode. This invention provides a sulfide-based active material obtained by calcining a mixture containing an acrylic monomer and sulfur, wherein the acrylic monomer has a boiling point above 230°C.

The invention relates to the field of oxidative desulfurization of oil and sulfur-containing liquid hydrocarbon fuels (including diesel fuel) and can be used to reduce harmful emissions and exhausts (in the form of sulphur oxide and carbon monoxide - SO2 and CO) of oil refineries, as well as various industrial enterprises (including energy), facilities and engines using hydrocarbon fuels. Method of oxidative desulfurization of oil and liquid hydrocarbon fuel and reducing harmful emissions of sulfur oxides and carbon provides a process of oxidation in tanks or pipelines by ozone (O3) or ozone-containing gases, in which sulfur oxides (SO2 and SO), without releasing them into the atmosphere, mix in a closed vessel or pipeline with carbon monoxide (CO) and by means of chemical reactions of sulfur monoxide decomposition (2SO↑ → SO2↑+S↓) and sulfur recovery (SO2↑ + 2CO↑ → S↓ + 2CO2↑) elemental sulfur (S) is extracted from oil or liquid hydrocarbon fuel and carbon monoxide (CO) is converted into its dioxide (CO2). The oxidation, also decomposition and recovery reactions are carried out one-step or sequentially, in the presence of oxidation-recovery group catalysts corresponding to these reactions, such as tert-Butyl hydroperoxide (C₄H₁₀O₂). Ozonized atmospheric air is used as ozone-containing gas.

An apparatus for solidifying liquid sulphur into orthorhombic crystals comprises a liquid sulphur feeding tank (1), connected to a sulphur cooling screw feeder (2), and at least one electromagnetic field source external to the screw feeder (2), for example a solenoid (31) with current flowing through it, acting on the sulphur, in such a way as to prevent it from crystallising in the monoclinic form above 100°C.

The present application relates to hydrogen sulfide treatment process technical field, specifically relates to a kind of continuous processing method and processing system of hydrogen sulfide-containing gas.The method includes: (1) in the presence of electrolyte, hydrogen sulfide-containing raw gas is continuously introduced into catalytic electrolysis unit and is carried out catalytic electrolysis, and the anode electrolysis zone of catalytic electrolysis unit obtains purified gas and lower layer's sulfur-rich electrolyte, and the cathode electrolysis zone in catalytic electrolysis unit obtains hydrogen;(2) sulfur-rich electrolyte is continuously introduced into anode electrolysis zone, then is carried out flash evaporation and obtains the electrolyte after flash evaporation;(3) the electrolyte after flash evaporation is sequentially deposited, and pressure filtration is carried out, and electrolyte lean solution, pressure filtrate and product sulfur are obtained;(4) pressure filtrate returns step (3) and is deposited, and part of electrolyte lean solution overflow returns step (1) and participates in catalytic electrolysis.The method of the present application can be coupled to produce hydrogen while treating H2S, so that the wasted hydrogen element can be used as green hydrogen production.

The utility model provides an acid making system capable of co-producing sulfur and treating Claus sulfur making tail gas, which comprises a first acid gas pipeline, a second acid gas pipeline, a combustion unit, a Claus reaction unit, an incineration unit, an SO2 catalytic oxidation reactor, an SCR (Selective Catalytic Reduction) denitration reactor and a sulfuric acid condenser, the combustion unit is connected with the Claus reaction unit, the Claus reaction unit is connected with the SO2 catalytic oxidation reactor, the SO2 catalytic oxidation reactor and the second acid gas pipeline are connected with the incineration unit, the incineration unit is connected with the SCR denitration reactor, the SCR denitration reactor is connected with the SO2 catalytic oxidation reactor, and the SO2 catalytic oxidation reactor is connected with the second acid gas pipeline. And the SO2 catalytic oxidation reactor is connected with the sulfuric acid condenser. According to the device, sulfur can be recycled through the Claus reaction unit, tail gas produced by the Claus reaction unit can be further converted into sulfuric acid through the incineration unit, the SO2 catalytic oxidation reactor and the sulfuric acid condenser, and the amount of discharged SO2 can be effectively reduced.

The invention relates to a sulfur isotope electrochemical separation method. The method comprises the following steps: preparing an initial electrolytic tank, a plurality of 34S collecting electrolytic tanks and a plurality of 32S collecting electrolytic tanks; an initial depletion electrode and a first rich collector electrode are installed in the initial electrolytic tank, a second rich collector electrode is installed in the 34S electrolytic tank, and a third rich collector electrode is installed in the 32S electrolytic tank; a pair of electrodes of the initial electrolytic tank are subjected to charge-discharge circulation, 32S is enriched on the first rich electrode, and 34S is enriched on the depletion electrode; the initial depletion electrodes are sequentially put into the 34S collection electrolytic tanks to serve as depletion electrodes, and 34S is enriched on the initial depletion electrodes during charging and discharging; the first rich collector electrode is put into a first 32S electrolytic tank to serve as a depletion electrode, charging and discharging are conducted, and 32S is enriched in a third rich collector electrode; and the rich collector III of the first 32S-collection electrolytic tank is put into the second 32S-collection electrolytic tank to serve as a depletion electrode, charging and discharging are carried out, and 32S is enriched on the original rich collector III of the electrolytic tank.

The invention discloses a system and a method for preparing green natural gas by coupling renewable resources with green hydrogen, and particularly relates to the field of preparation of green natural gas. Comprising a wind-light-green electricity supply and green hydrogen preparation module, a biomass gasification synthesis gas preparation module, a synthesis gas desulfurization purification module, a green hydrogen supplement and hydrogen-carbon ratio adjustment module and a high-temperature methanation synthesis green natural gas module. The wind, light and green power supply and green hydrogen preparation module is used for producing green hydrogen through wind, light and green power supply; the biomass gasification synthesis gas preparation module is used for treating agriculture and forestry waste biomass in a liquid deslagging fixed bed gasification mode to obtain synthesis gas; the synthesis gas desulfurization and purification module is used for performing desulfurization and purification on the synthesis gas. Full-chain zero-carbon circulation of green electricity-green hydrogen-green natural gas is achieved, the dual-carbon target requirement is met, the device investment and operation cost are reduced, and the resource utilization rate is remarkably increased.