84results about How to "Reduce hydrogen sulfide content" patented technology

Disclosed herein are processes for producing and separating ethane and ethylene. In some embodiments, an oxidative coupling of methane (OCM) product gas comprising ethane and ethylene is introduced to a separation unit comprising two separators. Within the separation unit, the OCM product gas is separated to provide a C₂-rich effluent, a methane-rich effluent, and a nitrogen-rich effluent. Advantageously, in some embodiments the separation is achieved with little or no external refrigeration requirement.

The invention relates to a hydro-upgrading method for catalytic cracking gasoline; the method comprises the following steps: gasoline whole fraction is cut into light fraction and heavy fraction; the cutting point is 60 DEG C to 80 DEG C; mercaptan in the light gasoline fraction is removed through mercaptan removal alkali washing; the heavy gasoline fraction and hydrogen gas have catalytic hydrodesulfurization, denitrogenation and olefin saturated reaction; reactor effluent or the reactor effluent after removing hydrogen sulfide is contacted with octane value restore catalyzer, and isomerization, aromatizatian and building up reaction are implemented, hydrogenated oil is separated and lighter hydrocarbon gasoline fraction is obtained, hydrogen-rich gas at the top of a high partial tank is circularly used through hydrogen sulfide removal, and lighter hydrocarbon at the top of a stabilizer tower is feedback to a fractionation tank to be fractionated again; the condition of the hydrotreating reaction is that hydrogen partial pressure is 1.5 to 3.0 MPa; the reaction temperature is 250 to 320 DEG C; the liquid hourly space velocity is 3.0 to 5.0 h<-1>, and the hydrogen-oil ratio is 200 to 500 Nm<3>/m<3>; the sulfur content of the gasoline product is smaller than 100 ppm, the octane value is unchanged, and the yield of gasoline reaches 98.5 weight percent.

The invention discloses an organic composite efficient sulfur removal agent for oil-gas field and preparation method and application of the organic composite efficient sulfur removal agent. The sulfur removal agent is characterized in that water serves a solvent and comprises an alcohol amine component A, an alcohol amine component B, a triazine derivative, inhibiter, synergist and low-molecular mass alcohols; the alcohol amine component A refers to methyldiethanolamine, the alcohol amine component B refers to one of triethanolamine and diethanolamine or a mixture of triethanolamine and diethanolamine; triazine derivative refers to hexahydro-1,3,5-tris-s-triazine; the inhibiter refers to seventeen alkenyl amide ethyl imidazoline; the synergist refers to sulfolane; the low-molecular mass alcohols refer to one of ethylene glycol and glycerol or a mixture of ethylene glycol and glycerol. The sulfur removal agent has the advantages of good selectivity on sulfuretted hydrogen, small dosage, quick effect, high sulfur removal efficiency, no corrosion of steel, stable product performance, difficulty in heating decomposition, capability of being biodegradable and the like; sulfide like sulfuretted hydrogen existing in extraction of an oil-gas well can be effectively removed or reduced to safety threshold value range in content, corrosion of sulfide on pipelines and equipment is inhibited, and safety on the equipment and operation personnel is guaranteed.

The invention discloses a diesel hydrogenation method, which comprises: reacting a diesel raw material in a conventional liquid-phase circulating hydrogenation reactor, and subjecting the efflux to gas-liquid separation; after hydrogen dissolved in a liquid phase is saturated, delivering the liquid phase to a liquid phase circulating hydrogenation reactor for reaction; and after liquid-phase circulating oil passes through a hydrogen sulfide removal reactor, circulating the liquid-phase circulating oil to the entrance of a liquid phase hydrogenation reactor. In the method, the raw material oil is pretreated by gas-phase circulating hydrogenation, the sulfur content in the generated oil is reduced to 500 mu g/g; and after a liquid-phase hydrogenation reaction, the hydrogen sulfide removal content in the circulating oil is reduced; and after hydrogen sulfide is removed from the circulating oil by absorption, the hydrogen sulfide content can be reduced to below 100 mu g/g, a sulfur-containing environment required by a catalyst is maintained, the activity of the catalyst is not inhibited, and thus, smooth deep removal of aromatics and deep desulfuration reaction in the liquid-phase hydrogenation reactor are promoted.

The invention relates to a compulsory mixed tail gas furnace. An igniter is communicated with a burner inner pipe; a composite air distribution blade is positioned at the other end of a burner, and is communicated with a combustor; a primary air inlet is arranged on a shell of the combustor; a vortex guide vane is positioned in an air chamber between the primary air inlet and the composite air distribution blade; the combustor is sequentially communicated with an air cavity and a tail gas cavity; a secondary air inlet is arranged out of the shell of the combustor at the air cavity, and the air cavity is communicated with the combustor; a vortex mixing blade is installed at the connecting end of the combustion chamber and the tail gas cavity; and an inner shunting and accelerating mixing blade and an outer shunting and accelerating mixing blade are installed at a tapered end of the combustion chamber, and are fixed at the inner surface of a fire-proof lining of the combustion chamber. The structure has the characteristics that the fuel gas and air are mixed fully, the combustion is complete, the heat energy utilization is full, and the like; and the hydrogen sulfide content in the tail gas is reduced obviously, which plays an active role in pushing the integral performance and environment protection of a tail gas burning device.

The invention discloses a process for producing anhydrous ammonia by ammonia distillation and deacidification. The process comprises the following steps of absorbing hydrogen sulfide and ammonia in coal gas containing hydrogen sulfide and ammonia to obtain washed coal gas; passing the washed coal gas and washed rich liquor through an ammonia distillation and deacidification system to obtain anhydrous ammonia; and absorbing the hydrogen sulfide with ammonia-containing desulfurization barren liquor, wherein the mass ratio of ammonia and acid components in the ammonia-containing desulfurization barren liquor is (3.2-5.0):1, the ammonia distillation and deacidification system works at a pressure of 0.3-1.18MPaG, and the acid components comprise hydrogen sulfide, carbon dioxide and hydrogen cyanide.

The invention discloses a water quality improver and a preparation method thereof. The water quality improver comprises the following components calculated in parts by weight: 5-15 parts of sodium humate, 3-8 parts of a surfactant, 3-8 parts of diethyl aminoethyl hexanoate, 2-5 parts of potassium salt, 0.2-1 part of a thickening agent and 63-86.8 parts of water. The water quality improver disclosed by the invention has the benefits that through the sodium humate, the effects of rapidly complexing heavy metal ions and harmful elements in water and reducing the contents of heavy metal ions, ammonia nitrogen, nitrite, hydrogen sulfide in the aquaculture water are realized, and the purpose of purifying a water source is achieved, so that an excellent growth environment and baits are provided for farmed animals, and the healthy growth of the farmed animals is promoted.

Belonging to the technical field of sulfur recovery, the invention specifically relates to a treatment method for liquid sulfur degassing. The method includes a liquid sulfur degassing treatment stage: pressurizing undegassed liquid sulfur collected in an undegassed compartment of a liquid sulfur pool, then subjecting the pressurized undegassed liquid sulfur and compressed air to catalytic reaction together, removing H2S dissolved in liquid sulfur, mixing the degassed exhaust gas with air, then leading the mixture into a sulfur production furnace, returning the mixture to the thermal reaction stage again for further recovery of elemental sulfur; and recovery and storage of degassed liquid sulfur. The treatment method for liquid sulfur degassing provided by the invention is efficient, energy-saving and economical, and can greatly lower the SO2 emission concentration and H2S content.

A method of reducing hydrogen sulfide content in a medium is disclosed. The method may include the steps of contacting a medium containing hydrogen sulfide with an effective amount of hydrogen peroxide, contacting the medium with an oxidizing agent, converting the hydrogen sulfide to sulfate, and reducing the hydrogen sulfide content in the medium. The medium may be a gas or a liquid.

A process to reduce the hydrogen sulfide content of a hydrogen sulfide-containing subterranean formation and of products recovered from the subterranean formation by injecting sulfur dioxide into the subterranean formation.

The invention discloses compound powder of an anti-stress agent for aquaculture and a preparation method thereof. The compound powder of the anti-stress agent for aquaculture comprises, by weight, 3-4 parts of vitamin C, 3-4 parts of glucose powder, 1-2 parts of skullcap powder and 2-3 parts of dolomite dust. The preparation method comprises the following steps of smashing, screening, weighing and mixing. The compound powder contains definite ingredients, is stable in effect, convenient to use and high in bioavailability, can be directly taken orally and is not influenced by weather and environment conditions. After the compound powder is used, the constitution and food intake of fish bodies can be rapidly recovered, stress reaction is reduced, the fish bodies can get right as soon as possible, the medicine ingredients in the compound powder are safe and green, non-toxic, environmentally friendly and free of residues to aquatic animals including fishes, shrimps, crabs and the like, the constitution of the fish bodies is enhanced while the stress reaction is reduced, normal ingestion is not influenced, and healthy growth is promoted.

A coking gas desulfuration-regeneration integrated column having multilayer spray structure. In the invention, a conventional desulfuration technology device in the prior art is changed into an integrated column-type structure design in which a regenerated tail gas washing unit, a regenerating unit, a desulfuration unit and a desulfurated rich solution storage and reaction unit are optimized. In addition, in the four layers of filling material supports in the desulfuration unit are provided with corresponding coil-type re-cooling apparatuses and a two-layered spray structure is arranged at the upper part and the middle part of the desulfuration unit, so that the content of hydrogen sulfide in desulfurated coking gas is low. The regenerated tail gas washing unit installed on the top of the regenerating unit, wherein a tail gas washing process includes two parts: (1) feeding fresh water or a desulfuration solution, which satisfies circulation water equilibrium, to the upper part of interior of the tail gas washing unit; and (2) performing tail gas desulfuration to sprayed fresh water or desulfuration solution to form a washing solution, feeding the washing solution to the upper part of interior of the tail gas washing unit again through a circulation pump, jetting the fresh water or the desulfuration solution or jetting the washing solution by a high-pressure atomization spray gun to perform double tail gas desulfuration washing. By such a process, the operation of integrated column-type desulfuration and regeneration of coking gas is achieved.

The invention discloses a fiber liquid film contactor amine washing desulphurization device. The device comprises a first fiber liquid film mass-transfer contactor subassembly. The first fiber liquid film mass-transfer contactor subassembly comprises a fiber liquid film contactor, a settlement separating tank and a stream dividing pack. The vertical fiber liquid film contactor is mounted on one end of the horizontally disposed settlement separating tank through a flange. The device is advantageous in that when the hydrogen sulfide content of liquefied gas produced by an oil refinery is lower than 5000 mg/m3, the hydrogen sulfide content of the liquefied gas hydrogen sulfide in which is removed can be ensured to be lower than 1 mg/m3 by adopting amine washing with a primary fiber liquid film contactor and amine removing with a coalescer, and the liquefied gas after removal is free of entrainment of free amine liquids.

The invention provides novel skid-mounted equipment for removing hydrogen sulfide in natural gas. The equipment comprises a coalescing separator used for separating droplets and solids which are 5mu m or over, a heater used for realizing complex heating on natural gas to guarantee that the gas temperature is higher than dew point temperatures of water and hydrocarbon, a membrane separator used for crudely separating hydrogen sulfide in natural gas, a torch used for conducting vent combustion or intensive treatment on high-sulfur-content gas, a desulfurization tank used for re-adsorbing and removing remained small amount of hydrogen sulfide in the natural gas, a flowmeter used for monitoring throughput of the treated natural gas and a purified gas pipe network used for delivering standard natural gas, wherein a differential pressure gauge is arranged on the coalescing separator; and a dust filter is arranged at the natural gas outlet in the bottom of the desulfurization tank. The novel skid-mounted equipment has the advantages of highly integrated skid mounting, simplified process, convenience in transportation and removal, operation cost reduction and monitoring function availability.

The invention relates to a method and system for treating phenol-containing acidic water by direct liquefaction with coal. The method comprises steps as follows: (1) phenol-containing acidic water enters an extraction tower to be in counterflow contact with an ether solvent, the phenol-containing ether solvent flows out of the tower top, and the dephenolized water flows out of the tower bottom; (2) the phenol-containing ether solvent from the extraction tower top enters an extract distillation tower after heat exchange, the ether solvent flowing out of the distillation tower top is cooled forcyclic use, and crude phenols are led out of the tower bottom; (3) the water from the extraction tower bottom enters a hydrogen sulfide stripping tower after heat exchange, ethers and hydrogen sulfide flows out of the tower top, the ethers is cooled for cyclic use, and the acidic gas containing rich hydrogen sulfide enters a sulfur recovery device; and (4) the water extracted from the hydrogen sulfide stripping tower bottom enters an ammonia stripping tower after heat exchange, caustic alkali is added into a liquid phase on the tower bottom, a gas phase containing rich ammonia flows out of the tower top, and purified water flows out of the tower bottom. The purified water obtained by using the invention can be directly used as influent water for biochemical treatment.

The invention discloses a method and device for obtaining CO2 from an outlet of a producing well in a carbon dioxide oil extraction method, and belongs to the field of carbon dioxide recycling. The method comprises the following steps: (1) collecting associated gas from an outlet of a producing well, and pressurizing the associated gas, so that the associated gas is subjected to primary treatment to separate water and heavy hydrocarbon, and first treated gas is obtained; (2) contacting the first treated gas with an additive to remove hydrogen sulfide in the first treated gas to obtain a second treated gas, and carrying out pressurized cooling separation on the second treated gas to obtain liquid carbon dioxide; the additive is prepared from the following raw materials: N-hydroxyethyl-N-methylbenzylamine, p-carboxyl styrene acid, 2-acetamido propylene and N, N-methylene bisacrylamide. The hydrogen sulfide gas in the first treatment gas is selectively adsorbed by using the additive, so that the hydrogen sulfide content in the liquid carbon dioxide can be reduced, and the purity of the recovered carbon dioxide is improved.