1406 results about "Hydrogen sulphide" patented technology

The invention relates to a sulfur removal agent suitable for the production of an oil-gas well. The sulfur removal agent comprises the following components in percentage by mass: 10 to 25 percent of hexahydro-1,3,5-tris(hydroxyethyl)-s-triazine, 5 to 20 percent of alcohol amine, 5 to 20 percent of small molecular alcohol and the balance of water. The alcohol amine is one or a mixture of more thantwo of monoethanolamine, ethyleneglycol amine, diisopropanolamine, methyldiethanolamine and triethanolamine; and the small molecular alcohol is one or a mixture of more than two of methanol, ethanol and propanol. The sulfur removal agent has a simple formula, can be soluble with water, and can effectively reduce the content of hydrogen sulfide in crude oil or natural gas; simultaneously, productsgenerated by the sulfur removal agent and the hydrogen sulfide are water-soluble, and cannot block a mineshaft and influence the normal production of the oil-gas well; and the sulfur removal agent can achieve effects at the temperature of 30 to 120 DEG C and can be quickly reacted with the hydrogen sulfide.

A method for removing hydrogen sulphide and carbon dioxide from a gas stream includes the step of contacting the gas stream with aqueous and gaseous ammonia in a closed vessel in the presence of solid iron. An apparatus for removing hydrogen sulphide and carbon dioxide from a gas stream includes a closed vessel for containing aqueous and gaseous ammonia and an iron source. The vessel is partitioned into inlet and outlet chambers and may itself serve as the iron source.

Compositions for generating a cooked flavor in a foodstuff, comprising specified flavor precursors that react on heating to generate the flavor and maintain a reactive association after inclusion in the foodstuff. The compositions may include combination of a sulphur source, e.g. hydrogen sulphide, methane thiol, a sulfur-containing amino acid, thiamine, cystine, sodium sulphide, ammonium sulphide, ammonium polysulphide, onions, garlic, shallots, eggs, methionine, and mixtures thereof, and at least one reductone, e.g. a furanone, a ketone, a pyrone, an aldehyde, a carbonyl compound, isomaltol, maltol, pyruvaldehyde, hydroxyacetone, 3-deoxyglucosone, 5-hydroxy-5,6-dihydromaltol, 2,3-butanedione, 3-hydroxy-2-butanone, a process flavor, cooked vegetable concentrates, soy sauce, and mixtures thereof.

The invention discloses a method for preparing an electrochemical luminescence paper chip and a method for measuring content of signal molecule hydrogen sulfide in MCF-7 by using an electrochemical luminescence sensor. The method is characterized by preparing a hydrophobic region, a semi-hydrophobic region, a hydrophilic region and a hollow channel on paper by utilizing a wax printing technology, cutting the hollow channel by virtue of a laser cutting machine, preparing proper printing ink, printing a corresponding reference electrode and a working electrode on the paper, functionalizing the working area, dripping stock solution in a pretreatment region, and fixing cancer cells; and folding the prepared paper chip, forming a three-electrode system, dropwise adding electrolyte solution in a reaction region, connecting an electrochemical workstation, thus realizing high-sensitivity detection of the low-content signal molecules in the cancer cells.

The invention discloses a heavy metal waste acid and wastewater resource recycling method and device. According to the method, acids in waste acid can be well separated through selection of anionic and cationic membranes in the electrodialysis process, heavy metal ions still remain in a waste acid solution, and the separated acid enters a concentration basin, has the acidity of over 8 percent and can be used for a sulfuric acid preparation process; the acidity of the treated waste acid is reduced to a pH value of over 3, valuable heavy metals in heavy metal-containing low-acidity waste liquor can be rapidly recovered by utilizing a hydrogen sulfide and jet process integration technology, and the recovery rate of the heavy metal ions is over 95 percent; the residual low-acidity low-salt wastewater can be recycled for a spraying system. According to the method, the heavy metal waste acid and wastewater can be treated at high efficiency, the phenomena that neutralization residues which are difficultly treated are generated and secondary pollution is caused in the process of neutralizing by adopting alkalis are avoided, high-quality sulfuric acid and heavy metals can be recovered, and more important, the adopted equipment and device are simple, convenient to operate and good in treatment effect.

A process is provided for the removal of hydrogen sulfide out of a gaseous stream (22), such as a natural gas, by contacting the hydrogen sulfide containing gas with a sorbing liquid (26) containing a tertiary amine so that the hydrogen sulfide is sorbed into the liquid in absorber (11) and transferring the sorbing liquid/hydrogen sulfide mixture to a reactor (15) where the tertiary amine promotes the conversion of the hydrogen sulfide into polysulfide via reaction with sulfur; transferring the polysulfide solution from the reactor (15) to a regenerator (10) where polysulfide is converted into elemental sulfur via reaction with air (9); transferring at least a portion of the solution (25) containing elemental sulfur, as well as sulfate and thiosulfate species, into a mixture (36) where it is contacted with gaseous ammonia which reacts with the sulfate and thiosulfate species to produce ammonium sulfate and ammonium thiosulfate which are removed from the solution while the remaining portion of solution (25) is transferred to a sulfur recovery unit (14). That portion of the solution which has been subjected to ammonium sulfate and ammonium thiosulfate removal is rejoined with that portion of the solution (25) being forwarded to sulfur recovery unit (14). The solution from the sulfur recovery unit (14) is recycled back to the absorber (11).

The invention relates to modified activated carbon, a preparation method of the modified activated carbon, and a method for adsorbing hydrogen sulfide using the modified activated carbon. The modified activated carbon is prepared by the method comprising the steps of: 1) mixing the raw material activated carbon with water, adding the mixture into a high-temperature reaction kettle for high-temperature modification, and then drying the high-temperature modified activated carbon; 2) then dipping the high-temperature modified activated carbon into KOH solution or CuSO4 solution for solution dipping modification; and 3) washing the activated carbon modified by dipping by distilled water to be neutral, drying again to obtain the combined modified activated carbon. The modified activated carbonhas good adsorptive capacity for hydrogen sulfide and greatly improves the sulfur capacity, thus being used for disposing hydrogen sulfide in a centralization-breeding factory.

The invention provides 125ksi anti-hydrogen sulfide stress corrosion high-strength oil casing steel and a preparation process thereof. The chemical components (% by mass) of the steel used in the present invention are as follows: 0.08-0.27% of C, 0.1-0.5% of Si, 0.15-1.8% of Mn, 0.3-1.0% of Cr, 0.4-1.0% of Mo, 0.05-0.4% of V, 0.01-0.1% of Ti, 0.1-0.7% of Cu, 0.2-3.0% of Ni, 0.0001-0.002% of B, 0-0.015% of P, 0-0.010% of S, 0-0.06% of O, 0-0.05% of N, 0-0.05% of H and the balance comprising Fe and unavoidable impurities. The yield strength of the steel grade is 862-1034 MPa, thereby meeting theinternational standard for anti-hydrogen sulfide stress corrosion NACE-A test requirements.

The invention relates to a formula and preparation technology of a granular non-noble-metal efficient integrated air purification composite material, and belongs to the technical field of adsorption catalysis and air pollution treatment. The composite material is characterized by taking zeolite, meerschaum, a porous active carbon material, iolite or a self-made carrier as a catalyst carrier, taking one or several non-noble-metal oxides as an active component and a nitrogen-containing organic auxiliary agent, and being prepared through an immersion method. The catalyst has a column granular shape, and has the capacity of the non-noble-metal oxides being 12-15 wt% and the content of the nitrogen-containing organic auxiliary agent being 2.0-4.0 wt%. The material can effectively adsorb and purify formaldehyde, TVOC, benzene, toluene, xylene, ozone, sulfur dioxide, nitrogen dioxide, hydrogen sulfide and ammonia gas in air in an integrated manner at normal temperature and humidity, and the overall purification rate is no less than 95%. The material is suitable for places, such as offices, office buildings, living rooms, shopping malls, hospitals and hotels, for integrated air purification.

The invention relates to a preparation method for a hydrogenated C9 petroleum resin. A technical point of the method is that: the method comprises a desulfurization process and a hydrogenation process. Steps of the desulfurization process comprise: pouring cyclohexane, toluene, and mixed aromatic hydrocarbon into a mixer, and completely mixing; heating the mixed resin solution, and adding the heated resin solution and hydrogen gas to a desulfurization hydrogenation reactor; carrying out a desulfurization reaction under an effect of a desulfurization catalyst; and carrying out high fraction separation, low fraction separation, gas stripping with a gas stripping tower, and hydrogen sulfide removing to obtain a desulfurization resin liquid. Steps of the hydrogenation process comprise: heating the desulfurization resin liquid, and adding the heated desulfurization resin liquid and hydrogen gas to a hydrogenation reactor; carrying out a hydrogenation reaction under an effect of a hydrogenation catalyst; carrying out high fraction separation and low fraction separation to obtain a hydrogenation resin liquid; and carrying out distillation on the hydrogenation resin liquid to obtain the hydrogenated C9 petroleum resin finished product. The desulfurization catalyst adopts cobalt and molybdenum as active ingredients, and the hydrogenation catalyst adopts nickel, tungsten and copper as active ingredients. The method of the present invention has characteristics of simple process, good decolorization effect, stable quality, wide application range, and the like.

The invention relates to a marsh gas purification method and a system thereof. The method comprises the following steps: keeping pressure below the pressure for the production of methane hydrate for the purpose of enabling carbon dioxide to react with sulfureted hydrogen to produce hydrate, and then separating methane gas from marsh gas. The marsh gas purification system comprises a marsh gas separating tank 6 and a marsh gas storage tank 1; liquid water is stored in the marsh gas separating tank 6; the marsh gas storage tank 1 is communicated with a compressor 2 through a pipeline equipped with a valve; the compressor 2 is communicated with the marsh gas separating tank 6 through a pipeline equipped with a valve; a refrigeration pipe 7 is coiled on the inner wall of the marsh gas separating tank 6; two ends of the refrigeration pipe 7 are mounted respectively on a refrigerator 8 positioned outside the marsh gas separating tank 6; the marsh gas separating tank 6 is communicated with a methane storage tank 9 through a pipeline equipped with a valve; and a marsh gas sampler A, a pressure sensor P, and a temperature sensor T are separately mounted on the marsh gas separating tank 6.

A process for producing a purified synthesis gas stream from a carbonaceous feedstock, the process comprising the steps of

• (a) partial oxidation of the carbonaceous feedstock with a molecular oxygen comprising gas to obtain a synthesis gas comprising water, hydrogen sulphide, and carbon dioxide besides the main constituents carbon monoxide and hydrogen,
• (b) mixing the synthesis gas and methanol and reducing the temperature of said mixture and separating a liquid methanol-water mixture from a cooled gaseous synthesis gas,
• (c) contacting the cooled synthesis gas obtained in step (b) with methanol to decrease the content of hydrogen sulphide and carbon dioxide in the synthesis gas, thereby obtaining a rich methanol stream comprising hydrogen sulphide and carbon dioxide and a synthesis gas stream depleted in hydrogen sulphide and carbon dioxide;
• (d) regenerating the rich methanol stream of step (c) by separating from the rich methanol a carbon dioxide fraction and a hydrogen sulphide fraction to obtain lean methanol, which lean methanol is used as methanol in step (b) and/or (c), and wherein
• (e) part of the methanol in the methanol-water mixture obtained in step b) is isolated and reused in step (b) and/or (c) and wherein,
• (f) another part of the methanol in the methanol-water mixture obtained in step (b) is recycled to step (a) under conditions such that methanol is converted into carbon monoxide and hydrogen.

The invention relates to a specific fluorescent probe for identifying hydrogen sulfide and an application of the probe, belonging to the field of fine chemical engineering. The fluorescent probe is a resorufin derivative. Resorufin sodium salt, potassium carbonate and 2, 4-binitro bromobenzene are mixed in proportion in acetonitrile liquor to be heated, and finally are purified by silica gel chromatography to obtain the fluorescent probe. The fluorescent probe and a corresponding hydrogen sulfide content detection process are not interfered by matrixes and impurities in a biosystem and can be used for quantitative determination of hydrogen sulfide content in various biosystems. The fluorescent probe has high specificity and can be hydrolyzed with hydrogen sulfide after being specifically cyclized to obtain a hydrolysate with broken ether bonds. The probe is low in cost and feasible, can be obtained by chemical synthesis and is simple and feasible in synthetic process. The probe is high in sensitivity, and has good fluorescence emission spectrum characteristics (600-650nm). In the wavelength range, the background fluorescence of a biological sample is weak, so that the probe is suitable for detecting hydrogen sulfide content in cells. Hydrogen sulfide is quantitively detected by drawing a standard curve.

A hydrocracking process wherein the feedstock is hydrotreated and the liquid and gaseous effluent from the hydrotreater is directly introduced into the upper end of a hydrocracking vessel which provides a liquid seal to prevent the passage of the gaseous stream containing hydrogen sulfide and ammonia from the hydrotreater to enter the hydrocracking zone containing hydrocracking catalyst. Fresh hydrogen is then introduced into the hydrocracking zone. An apparatus for hydrocracking a hydrocarbon feedstock is also disclosed.

The invention relates to an equipment cleaning agent which is used in the field of petroleum and chemical industry, in particular to a ferrous sulfide dirt neutral complexing cleaning agent which is used for washing a synthesized ammonia low-temperature methanol washing unit system in the petroleum chemical industry and the coal chemical industry. The ferrous sulfide dirt neutral complexing cleaning agent is prepared from the following raw materials in parts by weight: 5 to 8 parts of sodium gluconate, 7 to 11 parts of sodium salicylate, 20 to 26 parts of gadoliniam diethylene triamine pentaacetic acid, 20 to 26 parts of sodium ethylene diamine tetracetate, 40 to 46 parts of propenoic acid-itaconic acid copolymer, 25 to 32 parts of disodium polyepoxysuccinicate, 12 to 15 parts of sodium hydroxyphenylace, 3 to 7 parts of triethanolamine, 3 to 7 parts of hydrogen peroxide, 0.1 to 0.3 part of lauryl sodium sulfate, 0.1 to 0.3 part of polydimethyl siloxane fluid and 40 to 45 parts of water. The ferrous sulfide dirt neutral complexing cleaning agent is free from generating hydrogen sulfide when cleaning the ferrous sulfide dirt and corroding the equipment and has strong capacity for complexing the iron ions, the removal speed is fast, the decontamination rate is more than 98 percent, the neutralization and passivation are unnecessary to carry out after the chemical washing, and the equipment can be put into operation immediately.

The invention discloses a petroleum casing pipe with sulfurated hydrogen stress corrosion resistance and a producing method thereof, which aims to proceed from improvement on purity and tensile ratio of steel, tempered martensite proportion, grain refinement, remained stress reduction and other aspects, and provide the petroleum casing pipe with high obdurability and sulfurated hydrogen stress corrosion resistance and the production method thereof. The petroleum casing pipe comprises the following compositions in weight percentage: 0.12 to 0.18 percent of C, 0.10 to 0.60 percent of Si, 0.05 to 1.0 percent of Mn, 0.20 to 1.0 percent of Cr, 0.10 to 0.80 percent of Mo, 0.005 to 0.05 percent of Al, 0.005 to 0.02 percent of Ti, 0.05 to 0.15 percent of V, 0.002 to 0.02 percent of Nb, 0.0003 to 0.005 percent of Ca, 0.0003 to 0.005 percent of Mg, 0.0003 to 0.003 percent of B, less than or equal to 0.020 percent of P, less than or equal to 0.005 percent of N, and the balance being Fe, wherein the weight percentages of carbon, manganese, chromium and molybdenum are determined by a comprehensive control formula, that is A is equal to the sum of percentage of C, percentage of Mn divided by 5, percentage of Cr divided by 5, and percentage of Mo divided by 3, and the range of A is between 0.45 and 0.60 percent.

The invention discloses hydrogen sulfide corrosion-resistant steel for a petroleum drill rod and a manufacturing method for the hydrogen sulfide corrosion-resistant steel. The steel for a drill rod pipe body comprises the following chemical components in percentage by weight: 0.20 to 0.35 percent of C, 0.1 to 0.5 percent of Si, 0.3 to 1.5 percent of Mn, 0.5 to 1.5 percent of Cr, 1.0 to 2.5 percent of Mo, 0 to 0.25 percent of V, 0 to 0.05 percent of Ti, 0.01 to 0.05 percent of Nb, 0.008 to 0.02 percent of Ca, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 30ppm of O, less than or equal to 60ppm of N, 0.01 to 0.05 percent of Al and the balance of Fe and inevitable impurities. The method for manufacturing the drill rod pipe body comprises the following steps of: smelting by using an electric furnace; performing LF+VD dual vacuum treatment after the smelting; performing LF refining to ensure that [N] is less than or equal to 30ppm, and [O] is less than or equal to 10ppm; standing for 5 to 15 minutes after VD vacuum treatment; treating the Ca in a Si-Ca silk feeding mode; continuously casting, and controlling the continuous casting blank pulling speed to be between 1.8 and 2.5m/min; hot rolling the materials to form a seamless steel pipe, thickening the two ends of the seamless steel pipe, heating at the temperature of between 850 and 950 DEG C, keeping the temperature for 0.5 to 1 hour, and quenching; and keeping the temperature of between 680 and 730 DEG C for 1 to 3 hours, tempering, and thus obtaining the drill rod pipe body, wherein the yield strength of the pipe body is more than 120ksi.

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.