878 results about "Hydrogen sulphide" patented technology

The invention belongs to the technical field of preparation of hydrogen sulfide stress corrosion resistant oil well pipes, and relates to a 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material suitable for a normal temperature environment containing 1MPa H2S and a preparation method of the 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material. B, Ti, V and Nb elements are added, and the contents of Si, Mn and Ni elements, the Cr / Mo ratio and the sum of Nb, V and Ti in steel are controlled; the refined 100% sorbite structure, various compounds and microalloying are obtained through the processes of pure steel smelting, forging, controlled rolling and secondary heat treatment, so that high strength and high toughness in the 125 ksi range are obtained, and meanwhile the hydrogen sulfide corrosion resistance is high. The pipe product obtained by the process method disclosed by the invention has no corrosion cracking phenomenon after being subjected to a corrosion resistance test under the partial pressure of hydrogen sulfide of 1MPa.

Disclosed are a resin substrate-based iron oxyhydroxide desulfurizing agent and a preparation method therefor, falling within the technical field of gas purification and treatment. In the present disclosure, sodium percarbonate is used as a raw material to prepare iron oxyhydroxide. Sodium percarbonate serves both as an alkaline precipitant and as an oxidant. P-aminophenol and formaldehyde are subjected to condensation polymerization to form linear phenolic resin, which is then modified with terephthalyl alcohol to connect into a cross-linked network structure resin. The resin is used as a substrate to obtain the resin substrate-based iron oxyhydroxide desulfurizing agent. The preparation method of the present disclosure is simple and achieves a larger sulfur capacity and desulfurization efficiency, making it suitable for the removal of hydrogen sulfide from waste gas.

The invention discloses a rectification mechanism and a carbon disulfide production system containing the same. The rectification mechanism comprises an integrated rectification tower, and an inner cavity of a shell of the integrated rectification tower is sequentially divided into a function-integrated pre-separation and sulfur removal area, a main rectification and hydrogen sulfide removal area and a condensation reflux area from bottom to top in the vertical direction; the pre-separation and sulfur removal area comprises a settling tank arranged at the lower part of the shell, a gathering cover arranged above the inner wall of the settling tank, and a gas rising pipe I arranged above the gathering cover; the invention belongs to the technical field of chemical separation, and achieves the technical effects that multi-stage functions of pre-separation, main rectification, precise purification, final condensation and the like are innovatively integrated in a single tower, so that the fundamental simplification and compactness of the equipment structure are realized; in the traditional process, separate coarse removal, fine removal and finished product towers are replaced by unique expanded settling tanks in the towers, filler layers of integrated plate heat exchangers, tower tops with spiral condensation channels and side-draw systems.

The invention discloses an oil field desulfurizer and a preparation method thereof. The preparation method comprises the following steps: dissolving 1, 3-propane sultone in toluene, dropwise adding equimolar 1-methylimidazole under an ice-water bath, and heating to room temperature for reaction after dropwise adding; separating out a product after the reaction is finished, and dropwise adding equimolar concentrated sulfuric acid to obtain imidazole ionic liquid; mixing the imidazole ionic liquid with a catalytic promoter to obtain a catalyst; the preparation method comprises the following steps: adding paraformaldehyde, a triazine compound and a catalyst into a solvent, heating to 50-90 DEG C, controlling a reflux reaction for 6-9 hours, and after the reaction is finished, carrying out reduced pressure distillation to remove the solvent and separate out the catalyst, thereby obtaining the oil field desulfurizer. The desulfurizer is a modified triazine compound with a novel structure, N and lateral branch functional groups on a triazine ring of the desulfurizer can react with hydrogen sulfide, and compared with a conventional triazine desulfurizer, a plurality of desulfurization points are added, so that the sulfur capacity is greatly improved.

The invention discloses a brain-targeted active oxygen responsive hydrogen sulfide donor liposome, a preparation method and an application, and belongs to the technical field of pharmaceutical preparations, the structure of the brain-targeted active oxygen responsive hydrogen sulfide donor liposome comprises a lipid material and a hydrogen sulfide donor encapsulated in the lipid material, the lipid material comprises phospholipid, cholesterol, active oxygen sensitive lipid and brain-targeted lipid, and the lipid material comprises phospholipid, cholesterol, active oxygen sensitive lipid and brain-targeted lipid. The active oxygen sensitive lipid comprises a phospholipid lipophilic part, a polyethylene glycol hydrophilic part and an active oxygen sensitive bond, and the brain-targeted lipid comprises a phospholipid lipophilic part, a polyethylene glycol hydrophilic part and brain-targeted peptide. The hydrogen sulfide donor lipidosome can penetrate through a blood brain barrier, target neuronal cells, respond to an active oxygen environment of a focus part and sensitively release a hydrogen sulfide donor, so that hydrogen sulfide is distributed in the focus neuronal cells, active oxygen and active nitrogen substances are effectively removed, oxidation and nitration stress are inhibited, and damage and death of the neuronal cells are reduced; the growth and functional recovery of neuronal cells are promoted, and the application prospect in the aspect of treating central nervous system injury diseases is good.

The invention discloses a method for preparing 12-mercaptan through solid organic acid catalysis, belongs to the technical field of 12-mercaptan preparation, and aims to solve the problems of low catalyst activity, harsh reaction conditions, serious pollution, high cost and dependence on import in the prior art. N-dodecanol and hydrogen sulfide are used as raw materials and are mixed according to the molar ratio of 1: 1.2-1: 1.3; the method comprises the following steps: gasifying n-dodecanol, mixing with purified hydrogen sulfide, preheating to 210-240 DEG C, introducing into a fixed bed reactor filled with a solid organic acid catalyst, and reacting at-0.08-3.0 MPa for 3.5-4 hours; and cooling and condensing the reaction product, carrying out gas-liquid separation, rectifying and purifying the liquid product to obtain 12-mercaptan with the purity of more than or equal to 99.5%, and recycling unreacted hydrogen sulfide. The solid organic acid can be a catalyst of p-toluenesulfonic acid and the like or mesoporous silica loaded nickel, cobalt and molybdenum metal oxides. The method has the advantages of high catalytic activity, mild reaction conditions, high product yield (the conversion rate of n-dodecanol is greater than or equal to 94.5%), environmental protection and low cost, can realize the domestic mass production of 12-mercaptan, and meets the market demand.

The invention provides high-toughness hydrogen sulfide corrosion-resistant steel for a seamless steel pipe for drilling and production, a production method of the high-toughness hydrogen sulfide corrosion-resistant steel, a seamless steel pipe heat treatment process and application of the high-toughness hydrogen sulfide corrosion-resistant steel. The high-toughness hydrogen sulfide corrosion-resistant steel comprises the following components: 1.00-1.30% of Cr, 0.50-0.70% of Ni, 0.90-1.10% of Mo, 0.020-0.050% of Al, 0.10-0.20% of V, 0.10-0.20% of Nb, 0.20-0.25% of C, 0.15-0.30% of Si, 0.50-0.70% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0015% of S and the balance of Fe and inevitable impurities. A Cr-Mo-Ni system is adopted and supplemented with microalloy elements such as Nb and V to improve the obdurability and improve the SSC resistance. And through two times of thermal refining, the dislocation density of the material is reduced, and the loading strength of a NACE TM0177 standard A solution is met.

The invention relates to a spherical hydrotalcite phase desulfurization adsorbent as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing an iron source, a nickel source and organic carboxylate, and then carrying out hydrothermal carbonization reaction to obtain the spherical hydrotalcite phase desulfurization adsorbent. The nickel source and the iron source are selected as the raw materials, hydroxide radicals of laminates and carbonate ions between the laminates of the prepared hydrotalcite phase desulfurization adsorbent can increase the alkalinity of the surface of the desulfurization adsorbent and improve the adsorption capacity to hydrogen sulfide, and meanwhile, the hydrotalcite phase desulfurization adsorbent can react with hydrogen sulfide in a catalytic oxidation manner, so that the removal efficiency is improved. Organic carboxylate is selected as a hydrothermal auxiliary agent, carboxylate radicals can chelate metal ions through multidentate coordination to form a stable complex, so that the nucleation rate of hydrotalcite is delayed, the particle size uniformity is improved, meanwhile, a carbon coating layer is generated through hydrothermal carbonization, and pores in the carbon coating layer and pores in hydrotalcite can form hierarchical pore channels, so that the composite material is prepared. The mass transfer efficiency is synergistically improved, so that the adsorption capacity of the adsorbent is improved.

A method for synergistically preparing lithium sulfide by vacuum molten salt based on hydrogen sulfide-lithium salt reaction belongs to the technical field of battery materials, and comprises the following steps: placing a lithium salt solid in a reactor, introducing a molten salt medium on the surface of the lithium salt or in a reaction system, introducing purified hydrogen sulfide gas under a vacuum auxiliary condition, controlling the reaction temperature to be 200-500 DEG C, and reacting for 1-2 hours; and adjusting the flow rate of hydrogen sulfide to be 50-1000mL / min and the retention time to be 5-180min, continuously exhausting gas to discharge water vapor in the reaction process, stopping introducing hydrogen sulfide gas after the reaction is finished, cooling the system to room temperature under the protection of inert gas, taking out the product, washing to remove residual fused salt, and carrying out vacuum drying to obtain the high-purity lithium sulfide. The prepared lithium sulfide has high purity (greater than or equal to 99.90%), low defect density and an excellent crystal structure, and can be widely applied to lithium-sulfur batteries, all-solid-state batteries and novel energy storage technologies, so that the energy density is improved, the cycle life is prolonged, and the energy consumption is reduced.

A method for providing a fuel includes removing hydrogen sulfide and / or carbon dioxide from biogas to provide partially purified biogas, which is filled in a mobile storage system. The partially purified biogas is transported to a centralized processing facility, in the mobile storage system, by truck, rail, or ship. At the centralized processing the partially purified biogas is further processed, either to produce a fuel that is renewable or has renewable content, or to produce renewable natural gas, which is used to produce the fuel that is renewable or has renewable content.

The invention discloses a preparation method and application of a CoxSy catalyst, and belongs to the technical field of catalyst preparation. According to the method, the morphology of CoxSy is regulated and controlled by using different solvents, so that four CoxSy catalysts with different morphology characteristics are synthesized. The catalyst is simple in preparation method and high in repeatability. The obtained CoxSy catalyst has a high specific surface area, more active sites can be exposed, reaction raw materials are in full contact with the active sites of the catalyst, and meanwhile, the catalyst has relatively high sulfur tolerance and rich sulfur vacancies, and is beneficial to adsorption and activation of H2S and CO2. Therefore, the obtained CoxSy catalyst shows high catalytic activity in a reaction for preparing methyl mercaptan through H2S and CO2 hydrogenation.

The invention discloses a fluorescent covalent organic framework material for hydrogen sulfide detection as well as a preparation method and application thereof, relates to a covalent organic framework material as well as a preparation method and application thereof, and aims to solve the technical problems that an existing porous material for H2S detection is few in structure type, unstable in COFs (Covalent Organic Frameworks) structure, high in detection limit and harsh in detection environment. The periodic structure fragment of the fluorescent covalent organic framework material for hydrogen sulfide detection is shown in the specification. 3-(5, 10-diamino-1H-phenanthrene) [9, 10-d] imidazole-2-yl) phenol and 2, 4, 6-tri (4-formylphenoxy)-1, 3, 5-triazine are subjected to a reaction to obtain a hydroxyl intermediate, the hydroxyl intermediate is modified with 2, 4-dinitrofluorobenzene, and the fluorescent material is used for qualitative detection of H2S. The method is not interfered by amino acids and anions in the environment, and is not influenced by an acid-base environment. The method can be used in the field of H2S detection.

Provided is a hydrogen sulfide removing agent that can be stably used while maintaining hydrogen sulfide removing ability equivalent to that of a hydrogen sulfide removing agent comprising an amorphous iron oxyhydroxide. This iron oxyhydroxide-based hydrogen sulfide removing agent contains amorphous iron oxyhydroxide and a crystalline component. The content of the amorphous iron oxyhydroxide is not less than the content of the crystalline component.

The invention relates to a CuKMoS2 / SiO2 catalyst for synergistically preparing methyl mercaptan from carbon dioxide and hydrogen sulfide. By introducing a small amount of copper (Cu) into a KMoS2 / SiO2 catalyst system, the selectivity of the catalyst to a reaction intermediate product methanol (CH3OH) is remarkably improved, so that the generation selectivity to a target product methyl mercaptan (CH3SH) is improved. The introduction of Cu promotes the electron transfer of active sites on the surface of the MoS2 catalyst, and optimizes the reaction path. The invention provides a preparation method of a catalyst with high efficiency, good selectivity and strong stability and a new process applied to methyl mercaptan production.

The invention provides a preparation method and application of a catalyst for selective production of ethanethiol. The catalyst comprises an active component, an auxiliary agent and a molded alumina carrier, the active component comprises the following components in percentage by mass: 5-10% of VIII group transition metal oxide and 15-20% of VIB group metal oxide, and the auxiliaries comprise 0.5-4% of alkali metal, 1-3% of alkaline earth metal oxide, 0.6-2% of cerium oxide and 1-4% of phosphorus pentoxide. A bifunctional catalyst with moderate Lewis acid-base sites is constructed by compounding a multi-component aid and an active component, and the catalyst shows excellent catalytic activity that the ethylene conversion per pass is greater than or equal to 98%, the ethanethiol selectivity is about-95% and the ethanethiol yield is-90% under the reaction conditions that the hydrogen sulfide / ethylene feeding mass ratio is 3-5, the temperature is 180-210 DEG C, the pressure is 0.5-1.0 MPa and the volume space velocity is 200-300 h <-1 >. And the catalyst can stably run for 1250 hours or more.

The present invention provides a method for preparing lithium sulfide and lithium sulfide, so as to prepare a high-purity lithium sulfide without increasing the purification cost. The method includes: keeping thiourea and lithium hydroxide warm under a first condition to obtain a mixture; wherein, the first condition includes a heat preservation temperature of 130-180 °C; reacting the mixture with hydrogen sulfide under a second condition to obtain lithium sulfide; wherein, the second condition includes a temperature condition of 500-760 °C.

The invention discloses a glucose-responsive hydrogen sulfide release cascade nano-enzyme as well as a preparation method and application thereof. The cascaded nano-enzyme takes BSA as a growth template and a carrier, and FeS and Au nano-particles are loaded. The FeS-coated Au is synthesized by adopting a biomineralization method, so that the co-loading of FeS and Au is realized, and good biocompatibility is achieved. Meanwhile, by combining the peroxidase-like activity of FeS and the glucose oxidase-like activity of Au, glucose can be catalyzed in a cascade manner to generate toxic hydroxyl free radicals, and drug-resistant bacteria are efficiently killed. In addition, the FeS (at) Au cascade nano-enzyme has a hydrogen sulfide gas release function, and can promote vascular regeneration by up-regulating a hypoxia inducible factor-1 pathway. The cascade nano-enzyme responding to the hyperglycemia microenvironment is combined with a gas treatment mechanism, blood glucose can be effectively consumed, drug-resistant bacterium infection can be eliminated, revascularization can be promoted, and a new strategy is provided for treatment of diabetes wounds infected by drug-resistant bacteria and regeneration of skin tissues.

The ultrahigh-strength hydrogen sulfide corrosion resistant X100 pipeline steel coil plate comprises the following chemical components in percentage by weight: 0.03 to 0.07 percent of C, 0.1 to 0.3 percent of Si, 1.4 to 1.75 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.001 percent of S, 0.01 to 0.03 percent of Ti, 0.08 to 0.11 percent of Nb, 0.2 to 0.4 percent of Cr, 0.2 to 0.5 percent of Mo, 0.5 to 0.9 percent of Ni, 0.25 to 0.50 percent of W, more than or equal to 1.15 percent of Ni + Cr + W, more than or equal to 1.00 percent of Ni / W, more than or equal to 1.65 percent of Ni / Cr, 0.02 to 0.05 percent of Als, 0.002 to 0.006 percent of Ca, less than or equal to 0.008 percent of N and the balance of Fe and inevitable elements. And a low-carbon high-niobium microalloy design is adopted, so that the HIC resistance is good.

The present invention relates to a method for preparing lithium sulfide, according to the present invention, when preparing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is carried out under relatively mild conditions compared to the prior art, so that frequent maintenance or replacement due to corrosion and failure of a reactor and various pipes is not required, thereby improving the economical efficiency of the process. Further, by reusing the unreacted hydrogen sulfide from which moisture has been removed and the solvent, process costs can be reduced, and economical efficiency can be ensured during mass production. Furthermore, moisture and water vapor generated in the lithium sulfide generation reaction are effectively removed, thereby preventing a reverse reaction for generating lithium hydroxide, promoting a positive reaction, and producing high-quality lithium sulfide with high purity and high yield. In addition, the particle size can be adjusted in units, and a separate pulverizing space or pulverizing table is not required, so that convenience and mass productivity are excellent.

A process for stabilizing nutrients in anaerobic digestate involves removing hydrogen sulfide and ammonia from biogas. This process involves circulating the digestate in a column and contacting it with the biogas. Additional ammonium bisulfite, ammonia, and / or sulfur dioxide may be added to the contacting device to remove hydrogen sulfide from the biogas. The reactions will create ammonium bisulfite, ammonium sulfite, and ammonium thiosulfate to prevent ammonia and hydrogen sulfide emissions to allow for land application.

The invention belongs to the technical field of coke oven gas purification treatment, and particularly discloses a method for removing hydrogen sulfide in coke oven gas through photocatalysis, generation of oxygen vacancies is promoted by adopting a synthesis concept of synergistic effect of silver doping and polyethyleneimine, polyethyleneimine provides an alkaline condition on one hand, lone electron pairs on nitrogen are coordinated with zinc on the other hand, and the hydrogen sulfide in the coke oven gas is removed through photocatalysis. The preparation method comprises the following steps: by taking H2S and polyethyleneimine as raw materials, generating abundant oxygen vacancies under the synergistic effect of the H2S and silver, preventing agglomeration of generated ZnO and increasing reaction sites by taking polyethyleneimine as a surfactant, and then promoting a cascade reaction between ZnO < 1-x > and H2S by taking abundant oxygen vacancies, so that a 1D / 3D-ZnS / ZnO heterojunction is generated in situ to further reduce recombination of photo-generated electron holes; the catalyst converts H2S into elemental sulfur through photo-induced electrons and holes, and a carbon disulfide solution is used for cleaning the catalyst to realize regeneration of the catalyst. The method provided by the invention not only improves the removal efficiency of H2S, but also reduces the operation cost and reduces environmental pollution.

The invention discloses a triazine desulfurizer and a preparation method thereof, and belongs to the technical field of gas purification. The triazine desulfurizer is mainly prepared from the following raw materials in percentage by weight: 20 to 50 weight percent of triazine derivative, 10 to 15 weight percent of sterically hindered amine, 3 to 7 weight percent of stabilizer, 1 to 3 weight percent of synergist, 0.5 to 1.5 weight percent of penetrant, 0.5 to 1.5 weight percent of inhibitor, 1 to 2 weight percent of additive and the balance of water, the preparation method of the triazine derivative comprises the following steps: adding 2-(diphenylphosphino) ethylamine into a toluene solvent, adding a paraformaldehyde aqueous solution in batches under a stirring condition, and reacting for 2-8 hours to obtain the triazine derivative. According to the triazine desulfurizer and the preparation method thereof provided by the invention, the triazine derivative and the sterically hindered amine are taken as a host, and the stabilizer, the synergist, the penetrant, the inhibitor and the assistant are compounded, so that the scaling trend of the triazine desulfurizer in an oil and gas well can be slowed down, the dissolution rate of hydrogen sulfide and the mass transfer rate in a solution are increased, and the desulfurization reaction is promoted; the desulfurization effect and the desulfurization rate are improved, and meanwhile, a very good scale inhibition effect is also achieved.

The invention provides a BDO (1, 4-butanediol) wastewater treatment process with high sulfate content, which comprises the following steps: carrying out electrochemical oxidation treatment on BDO (1, 4-butanediol) wastewater with high sulfate content; introducing the obtained BDO wastewater into an anaerobic reaction device for anaerobic reaction to reduce sulfate ions into hydrogen sulfide and oxidize organic matters to reduce COD (Chemical Oxygen Demand); effluent sequentially flows back to the circulating desulfurization device and the air floatation device; carrying out aeration treatment in the circulating desulfurization device so as to oxidize hydrogen sulfide into elemental sulfur; elemental sulfur is recycled in the air flotation device, and part of effluent of the air flotation device and part of effluent of the anaerobic reaction device flow back to inlet water of the anaerobic reaction device; part of effluent of the air floatation device and part of effluent of the anaerobic reaction device are combined and then are sequentially introduced into an aerobic activated sludge tank with a membrane bioreactor and an ozone catalytic oxidation tank. Effluent can enter a subsequent ultrafiltration reverse osmosis membrane system to be purified, and water produced by the membrane system is recycled as reclaimed water.

The invention relates to the technical field of corrosion prevention of oil field pipes, and particularly discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion resistant sleeve coating and a preparation process of the electroplating liquid. The invention discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion-resistant sleeve coating. The electroplating liquid comprises the following raw materials: 60-90 parts of a composite tungsten source; 40-70 parts of a nickel-cobalt main salt; 35-55 parts of a composite complexing agent; 1-5 parts of carboxylated graphene quantum dots; 1 to 5 parts of an aminated ZIF-8 derived carbon nanocage; 1-5 parts of a rare earth stabilizer; 1-4 parts of sodium hypophosphite; 1-4 parts of sodium citrate; 1-3 parts of a surfactant; 15 to 25 parts of a buffering agent; and 350 to 450 parts of deionized water. According to the single-layer electroplated layer, the interface stress of the multi-layer structure can be eliminated, so that other interface problems such as plating layer cracking caused by underground temperature fluctuation are avoided, it is guaranteed that the thickness of the plating layer reaches the standard, and then it is guaranteed that the plating layer has excellent corrosion resistance.

The invention provides a stable acetylcysteine injection and a preparation method thereof. The acetylcysteine injection provided by the invention only contains a small amount of metal ion chelating agent, and can still improve the content of related substances in the preparation and obviously reduce the content of hydrogen sulfide in the preparation by using a novel package and performing terminal high-temperature sterilization under the condition of a pre-cleaning process. More importantly, in the long-term storage process of the acetylcysteine injection provided by the invention, the content of hydrogen sulfide presents a trend of continuously reducing.

The invention belongs to the field of microorganisms, and relates to lactobacillus paracasei. In particular discloses a lactobacillus paracasei strain HNGD-AL1, the taxonomic name is Lactobacillus paracasei, the lactobacillus paracasei strain HNGD-AL1 is preserved in China Center for Type Culture Collection on February 27, 2025, the preservation number is CCTCC M 2025303, and the preservation address is No. 299 on eight road in Wuchang District, Wuhan, Hubei. The method for degrading the sulfur-containing amino acid by adopting the lactobacillus paracasei is found for the first time, the effect of degrading 53.39% of the sulfur-containing amino acid can be achieved by culturing the probiotics in a fermentation culture medium for 24 hours, and the probiotics can be colonized in intestinal tracts and play a role in degrading the sulfur-containing amino acid in intestinal contents; the content of metabolite hydrogen sulfide of sulfur-containing amino acid in the intestinal tract is reduced by 60.92%, intestinal tract tissue damage, permeability and inflammatory response are reduced, and the purpose of improving ulcerative colitis is achieved. The preparation method has a wide application prospect in the aspects of preparation of low-sulfur-content amino acid foods and probiotic preparations for improving colitis.

The invention relates to a Raman probe for detecting hydrogen sulfide as well as a preparation method and application of the Raman probe. The gold and silver nanocage (AuAg NCs) is prepared, and after the gold and silver nanocage (AuAg NCs) is modified by a Raman signal molecule 4-ethynylaniline (4EA), it is found that the AuAg-4EANCs shows the strongest Raman enhancement effect at the position of 2010 cm <-1 > located in a cell silence zone. The SERS probe with the tumor targeting capability is developed through the functional modification of a mucoprotein 1 aptamer (MUin1aptamer, MUC1Apt) and polyethylene glycol (PEG), and the SERS probe with the tumor targeting capability is further developed through the functional modification of the mucoprotein 1 aptamer (MUin1aptamer, MUC1Apt) and the PEG (Polyethylene Glycol). In the presence of hydrogen sulfide (H2S) and oxygen, Ag in AuAg-4EANCs rapidly reacts with H2S to generate Ag2S with significantly reduced Raman enhancement performance, resulting in sharp attenuation of 4EA signal intensity. And along with the increase of the H2S concentration, the generation amount of Ag2S is increased, so that a quantitative detection model dependent on the H2S concentration is established.

The invention belongs to the technical field of semiconductor oxide gas sensors, and particularly relates to an rGO / CuO / Li sensitive material, a preparation method thereof and application of the rGO / CuO / Li sensitive material in H2S sensors. The preparation method comprises the following steps: firstly, preparing a graphene oxide nanosheet by using an improved Hummers method, and then preparing the rGO / CuO / Li sensitive material by using copper nitrate, lithium chloride and the prepared graphene oxide nanosheet as raw materials, polyvinylpyrrolidone as a surfactant and N, N-dimethylformamide as a solvent by using a one-step solvothermal method. Under the condition of room temperature, the sensitive material shows a relatively high response value (220.1) and a relatively low detection lower limit (1ppb) on hydrogen sulfide, has good selectivity, repeatability and stability, and has a wide application prospect in trace-level hydrogen sulfide detection in the fields of industrial safety and atmosphere detection.

The invention provides steel for a 120ksi steel-grade sulfur-resistant oil well pipe, a production method of the steel, the sulfur-resistant oil well pipe, a heat treatment method and application of the sulfur-resistant oil well pipe. The steel comprises the following components: 0.60-0.80% of Cr, 0.80-1.00% of Mo, 0.050-0.100% of Nb, 0.015-0.035% of Al, 0.10-0.20% of V, 0.25-0.30% of C, 0.15-0.35% of Si, 0.50-0.70% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0015% of S and the balance of Fe and other inevitable impurities. Compared with the prior art, the medium-carbon micro-alloying components, the pure steel smelting technology and the heat treatment technology are matched, dispersed and refined second phase structures are distributed on a tempered sorbite matrix in the room temperature state, the total series of non-metallic inclusions is lower than 1.0 level, and the product has good obdurability and excellent hydrogen sulfide corrosion resistance.

The invention discloses an intelligent hydrogen sulfide-resistant anticorrosive coating for a coal chemical industry pipeline and a preparation method, and belongs to the technical field of corrosion prevention of coal chemical industry pipelines. The coating is composed of a base material, a functional filler, an intelligent component and an auxiliary agent, the base material improves the mechanical property and chemical stability, the functional filler enhances the hydrogen sulfide corrosion resistance, and the intelligent components achieve the self-repairing function of the coating. The preparation method comprises the steps of microcapsule preparation, component mixing, ultrasonic dispersion, coating and thermocuring. The corrosion resistance of the coating is greater than or equal to 95% under the environment of 80 DEG C, 90% humidity and 1000ppm H2S, the adhesive force reaches grade 1, the tensile strength is 10-20MPa, and the elongation at break is 200-300%. The high-corrosion-resistance and self-repairing pipeline protection material has high corrosion resistance, self-repairing capacity and construction convenience, and is suitable for pipeline protection in a high-concentration hydrogen sulfide environment.