60results about "Hydrogen sulfides" patented technology

The invention provides a sewage steam stripping thermal self-circulation system which is characterized in that a first heat exchanger receives acidic water and is connected with a hot feed inlet of a steam stripping tower through a second heat exchanger, a first gas outlet of the steam stripping tower outputs ammonia gas through the second heat exchanger, and a second gas outlet outputs hydrogen sulfide; a purified water outlet of the stripping tower is respectively connected with a steam reboiler and a purified water inlet of a steam generator, a liquid outlet of the steam reboiler is connected with a condensed water inlet of the steam generator, a purified water outlet of the steam generator outputs purified water through a first heat exchanger, and a steam outlet and a condensed water outlet of the steam generator are connected with a steam compressor. And a steam outlet of the steam compressor is connected with a steam inlet of the steam reboiler. The problem of heat waste of purified water and condensed water can be solved, full utilization of medium-high temperature waste heat is achieved, the heat exchange process of raw material water is improved, the to-be-cooled temperature of the purified water is reduced, and energy loss is reduced.

The utility model discloses a hydrogen sulfide synthesis skid-mounted system which comprises a liquid sulfur transfer module, a hydrogen sulfide synthesis module, a product gas pretreatment module, a product gas purification module, a tail gas treatment module and a public engineering module, the liquid sulfur transfer module, the hydrogen sulfide synthesis module, the product gas pretreatment module, the product gas purification module and the tail gas treatment module are sequentially communicated, and the product gas pretreatment module and the product gas purification module are both communicated with the liquid sulfur transfer module. According to the hydrogen sulfide synthesis skid-mounted system disclosed by the utility model, each functional component is modularized, the size of each module is configured in a coordinated manner and meets the transportation condition, corresponding process pipelines, instrument components, cables and the like can be prefabricated and mounted when leaving a factory, and debugging work can be carried out only by simple assembly and construction on a construction site; the workload of a construction site is greatly reduced, waste of installation materials is effectively reduced, and the device has the advantages of being small in occupied area, low in construction cost and the like.

The application provides a reactor and a method for preparing hydrogen sulfide, and solves the technical problems of complex structure, low production efficiency and short service life of the catalyst of the existing equipment. The reactor is provided with a shell, an upper head and a lower head, an upper partition plate is arranged between the shell and the upper head, a lower partition plate is arranged between the shell and the lower head, at least one hydrogen gas feeding pipe and at least one sulfur feeding pipe are arranged on the reactor, at least one hydrogen gas discharging hole is arranged on the wall of the hydrogen gas feeding pipe, at least one sulfur discharging hole is arranged on the wall of the sulfur feeding pipe, a mixing pipe is arranged at the central axis of the reactor, at least one gas inlet hole is arranged on the wall of the mixing pipe, and at least one reaction pipe is arranged on the reactor. The application can be widely applied to the technical field of hydrogen sulfide reaction equipment.

A reactant generation system for a continuous production lithium sulfide fluidised bed reactor is disclosed which comprises a hydrogen generator in fluid communication with a natural gas source and a

A method for producing a chalcogen-containing compound semiconductor is provided, the method comprising: providing a processing chamber (3) with at least one substrate (5) coated with a precursor (4) of the chalcogen-containing compound semiconductor; heat-treating the at least one coated substrate (5) in the processing chamber (3), wherein during the heat treatment, a gaseous atmosphere containing at least one gaseous chalcogen compound is provided in the processing chamber (3); removing the gaseous atmosphere present after the heat treatment of the coated substrate (5) as exhaust gas from the processing chamber (3); and cooling the exhaust gas in a gas processor (13), wherein multiple types of gaseous chalcogen compounds present in the exhaust gas after the heat treatment of the coated substrate (5) are converted to liquid or solid states, thereby separating them from each other in time and space from the exhaust gas. An apparatus designed to carry out this method is also provided.

The invention belongs to the technical field of chemical separation, and discloses a two-stage low-temperature condensation coupling compression separation high-purity hydrogen sulfide purification process and system. The system consists of a two-stage low-temperature condensation unit, a hydrogen sulfide compression unit and a hydrogen sulfide collection unit, the two-stage low-temperature condensation unit comprises a hydrogen sulfide liquid separation tank, a hydrogen sulfide low-temperature cooler, a hydrogen sulfide low-temperature liquid separation tank, a hydrogen sulfide heat exchanger and a hydrogen sulfide saline water liquid separation tank. Hydrogen sulfide raw material gas containing carbon disulfide impurities is sequentially introduced into a two-stage low-temperature condensation unit, carbon disulfide is liquefied and separated out preferentially, low-temperature water is adopted in the first stage, and materials subjected to cryogenic compression throttling are adopted in the second stage for heat exchange; pressurizing and compressing the primarily purified hydrogen sulfide gas-phase component, and then condensing and separating to remove trace carbon disulfide and recover cold energy, thereby finally obtaining the high-purity hydrogen sulfide with the purity of more than or equal to 99.95%. According to the invention, a low-temperature two-stage low-temperature condensation-pressurized compression condensation coupling separation technology is adopted, and deep removal of carbon disulfide is realized under the condition that a third component is not introduced.

The disclosure relates to methods of irradiating a gas containing hydrogen sulfide (H2S) with high energy light to photolytically cleave some of the hydrogen sulfide in the gas to form sulfur-containing reactive species. The sulfur-containing reactive species act as autocatalysts that react with some of the remaining hydrogen sulfide in the gas to generate hydrogen gas and one or more sulfur-containing products. The methods remove hydrogen sulfide from the gas and produce hydrogen gas. The methods can be implemented in a component of a hydrocarbon producing well (e.g., a wellhead, a flow line, a production casing, a production tubing), a component used to transport the gas mixture produced by the well (e.g., a transportation pipeline), a gas treatment system (e.g., a tail gas treatment system), a borehole and / or an underground formation.

The present application relates to the technical field of recycling of organic waste liquid, and particularly relates to a system and method for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid. The system for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid provided by the present application comprises: a MEDA waste liquid tank; a lean-liquid rich-liquid heat exchanger connected with the MEDA waste liquid tank; a regeneration tower connected with a rich-liquid outlet of the lean-liquid rich-liquid heat exchanger; a cooler connected with a gas outlet of the regeneration tower; and a membrane separation device connected with a gas outlet of the cooler; and the membrane separation device is provided with a hydrogen sulfide gas outlet and a carbon dioxide gas outlet. The system and method for regenerating hydrogen sulfide and carbon dioxide by using MEDA waste liquid can remove the dissolved waste gas in the MEDA, realize the recycling of the MEDA solution, and simultaneously produce high-purity hydrogen sulfide and food-grade carbon dioxide products.

The present invention provides a process and apparatus for preparing high-purity hydrogen sulfide, relating to the technical field of hydrogen sulfide preparation. The process comprises obtaining high-purity sulfur, melting the high-purity sulfur in a sulfur melting kettle to produce liquid high-purity sulfur, preparing hydrogen gas and heating the hydrogen gas, and then sending the liquid high-purity sulfur and the heated hydrogen gas to a reaction tower for reaction to produce high-purity hydrogen sulfide gas. In the present invention, the use of high-purity sulfur and high-purity hydrogen to prepare hydrogen sulfide can reduce the generation of impurity gases and improve the purity of the hydrogen sulfide gas.

Methods for harvesting hydrogen from a natural hydrogen production zone are described. The method comprises introducing a stream (e.g., injection stream, sequestration stream) comprising sulfur dioxide into a natural hydrogen production zone to produce a gas mixture containing hydrogen sulfide; harvesting the gas mixture containing hydrogen sulfide; and converting the hydrogen sulfide to hydrogen, thereby harvesting hydrogen from the natural hydrogen production zone. The natural hydrogen production zone can be a ground subsurface or a subsurface of the ocean floor. Introducing the stream comprising sulfur dioxide can be performed by injection, sequestration, pumping, infusion or other methods for delivering sulfur dioxide to a well (e.g., gas injection well) at the natural hydrogen production zone.

The present application pertains to a method of making carbon disulfide. The method comprises reacting methane and sulfur under conditions sufficient to produce carbon disulfide, hydrogen disulfide, and heat. At least a portion of the produced hydrogen disulfide is reacted with methane under conditions sufficient to produce a mixture comprising carbon disulfide and hydrogen. Advantageously, at least a portion of the heat from reacting methane and sulfur is employed in the reacting of at least a portion of the produced hydrogen disulfide with methane.

A method for producing hydrogen sulfide by reacting sulfur gas and hydrogen gas in a reaction tank (101) to synthesize hydrogen sulfide, the method including: step (A) for supplying a gas mixture of sulfur gas with hydrogen gas to the reaction tank (101); step (B) for supplying hydrogen gas to the reaction tank (101); and step (C) for reacting the sulfur gas with the hydrogen gas to synthesize hydrogen sulfide. The amount of sulfur in the reaction tank (101) is detected and the amount of the hydrogen gas supplied in step (B) is adjusted according to the result.

Methods and systems are provided for treating the tail gas stream of a sulfur recovery plant. The methods including generating a tail gas stream from a sulfur recovery plant, treating the tail gas stream with a hydrogen sulfide removal unit and a hydrogen selective membrane unit, generating a stream low in hydrogen sulfide and a stream rich in hydrogen. The hydrogen sulfide rich stream is recycled to the sulfur recovery unit. The hydrogen selective membrane unit includes a glassy polymer membrane selective for hydrogen over hydrogen sulfide and carbon dioxide.

The present invention relates to a preparation method of lithium sulfide having excellent performance as a solid electrolyte raw material, and lithium sulfide prepared therefrom. Specifically, the present invention relates to: a preparation method of lithium sulfide, comprising adjusting, during preparation of lithium sulfide, the particle size of raw materials and reaction conditions so as to minimize residual impurities in lithium sulfide, and improving the flow characteristics and aggregation characteristics of particles, thereby providing an excellent solid electrolyte raw material; and lithium sulfide.

The utility model relates to a device for purifying hydrogen sulfide gas. The device comprises a first adsorption tower, a second adsorption tower and a low-temperature storage tank which are sequentially communicated, a first adsorption tower feed port is formed in the bottom of the first adsorption tower, and a first adsorption tower discharge port is formed in the top of the first adsorption tower; a second adsorption tower feed port is formed in the bottom of the second adsorption tower, and a second adsorption tower discharge port is formed in the top of the second adsorption tower; a low-temperature storage tank feed port and a low-temperature storage tank discharge port are formed in the top of the low-temperature storage tank; a feed port of the first adsorption tower is communicated with a crude hydrogen sulfide gas source through a pipeline, a discharge port of the first adsorption tower is communicated with a feed port of the second adsorption tower through a pipeline, a discharge port of the second adsorption tower is communicated with a feed port of the low-temperature storage tank through a pipeline, and a discharge port of the low-temperature storage tank is communicated with the product collection bottle. Through the first adsorption tower and the second adsorption tower which are arranged in sequence, the modified 5A molecular sieve is used for sequentially performing normal-temperature adsorption and cryogenic adsorption on hydrogen sulfide, and then the low-temperature storage tank is vacuumized, so that impurities can be effectively removed, and the product purity is improved.

The present invention discloses a method for preparing hydrogen sulfide by electrochemically reducing sulfur dioxide based on a dual-electrode flow electrolytic cell. In the method, during the process of electrochemically reducing sulfur dioxide to prepare hydrogen sulfide using the dual-electrode flow electrolytic cell, a cation exchange resin is filled in the cathode chamber of the dual-electrode flow electrolytic cell. The proton-exchanging property of the cation exchange resin is utilized to alleviate the problem of local pH increase on the electrode surface, thereby improving the mass transfer of the SO2 electrochemical reduction reaction, greatly reducing the influence of bubbles on the electrode surface, reducing the reaction cell pressure, and improving the stability of the reaction.

The present invention relates to a process for cleaning a CO2-rich gas feed, in the presence of a hydrogen-rich feed, in particular for removing sulfur-containing impurities, and optionally oxygen.

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

The application belongs to a device and method for co-production of industrial and electronic grade hydrogen sulfide from sulfur-containing tail gas; comprising a sulfur-containing tail gas pipeline, the sulfur-containing tail gas pipeline is connected with a light-removing rectifying tower through a first heat exchange pipeline of a raw material compressor and a main cooler, a liquid phase outlet of the light-removing rectifying tower is connected with a heavy-removing rectifying tower, a gas phase outlet of the heavy-removing rectifying tower is connected with a second gas-liquid separator through a heavy-removing condenser, a liquid phase outlet of the second gas-liquid separator is respectively connected with a reflux port of the heavy-removing rectifying tower, an industrial grade product storage tank and an electronic grade hydrogen sulfide preparation part; the electronic grade hydrogen sulfide preparation part comprises a refining tower, a gas phase outlet of the refining tower is connected with a third gas-liquid separator through a refining condenser, a liquid phase outlet of the third gas-liquid separator is respectively connected with a reflux port of the refining tower and an electronic grade product storage tank; having online flow distribution and adjustment, and being capable of continuously and flexibly adjusting the output proportion of two different grade products according to market demand without stopping.

The present invention relates to a process for cleaning a CO2-rich gas feed in the presence of a hydrogen-rich feed, in particular for the removal of sulfur-containing impurities, and optionally oxygen.

The application discloses a method for generating hydrogen sulfide by pulse electrolysis of gaseous sulfur dioxide, and belongs to the technical field of resource utilization of industrial sulfur dioxide flue gas. The method adopts a two-chamber flow electrolytic cell as an electrolysis system, passes electrolyte into an anode chamber and passes gaseous sulfur dioxide into a cathode chamber, applies pulse current or pulse potential between the anode and the cathode to perform electrolysis, and catalytically reduces and converts the gaseous sulfur dioxide into hydrogen sulfide. The method directly uses SO2 gas as a reactant, is not limited by the solubility of SO2 in liquid, improves the mass transfer of the reactant, significantly reduces the ohmic resistance of the electrolytic cell, reduces the reaction voltage, and adopts a pulse power supply mode to promote the periodic adsorption of SO2 and the consumption and accumulation of protons, promote the conversion of SO2 into H2S, improve the reduction efficiency of sulfur dioxide, and reduce energy consumption.

The invention relates to the field of industrial hydrogen sulfide gas treatment, and specifically discloses a process for purifying industrial by-product hydrogen sulfide gas. The process uses resin adsorption to adsorb impurities in the industrial by-product hydrogen sulfide gas. The specific process is: after washing with low-temperature methanol, industrial by-product hydrogen sulfide impurity gas mainly containing hydrogen sulfide is prepared; carbon dioxide in the impurity gas is removed by physical or chemical methods; the remaining gas contains hydrogen sulfide, alkanes and hydrogen cyanide; this gas mainly composed of hydrogen sulfide is sequentially subjected to classified adsorption treatment by resin to separate non-methane hydrocarbons and hydrogen cyanide gas from the hydrogen sulfide gas; the removal rate of non-methane alkane impurities in the purified hydrogen sulfide gas can reach more than 95%, and the removal rate of hydrogen cyanide gas can reach more than 92%; the purified hydrogen sulfide can be used as a raw material to produce high-value-added sulfur chemical products such as dimethyl sulfoxide at low cost, thereby having considerable social and economic benefits.

The application discloses a preheating type stirring device for hydrogen sulfide production and relates to the technical field of hydrogen sulfide production. The device comprises a jacket arranged outside a reaction kettle, the inside of the jacket is filled with heat exchange medium to heat or cool the reaction kettle; a material turning part is arranged to lift the raw material at the bottom of the reaction kettle and spread along the inner wall of the reaction kettle; a material stabilizing frame is arranged on the inner wall of the reaction kettle to support the solidified raw material. The material turning part is arranged to pump the liquid sulfur at the bottom of the reaction kettle upwards and make it flow downwards along the inner wall of the reaction kettle. In the preparation process, the liquid sulfur and hydrogen gas have a larger contact area, so that the reaction rate is improved. After the production is completed, the heat flow provided to the jacket is stopped, the temperature in the reaction kettle is gradually reduced, the liquid sulfur is still sprayed on the inner wall of the reaction kettle in the above manner, the liquid sulfur is solidified on the inner wall of the reaction kettle, and subsequent continuous heating and preservation are not needed.

This invention provides a method for preparing hydrogen and sulfur from solid waste gypsum through reduction and acidification in a cement kiln, relating to the field of solid waste disposal technology. The method involves targeted local modifications to a novel dry-process cement clinker rotary kiln production system. Using desulfurized gypsum, phosphogypsum, and other solid waste gypsum as raw materials, the gypsum is crushed, ground, preheated, and dehydrated. Then, it is calcined in a modified three-lobe gravity semi-suspended rotary kiln at 800–1100℃ in a reducing atmosphere to generate high-purity calcium sulfide. After sealed cooling, the calcium sulfide reacts with byproduct hydrochloric acid to produce high-purity hydrogen sulfide. The hydrogen sulfide is then used to co-produce hydrogen and sulfur via a medium-assisted electrochemical decomposition method, or high-purity sulfur can be directly prepared using the Claus process. This invention achieves full resource utilization of solid waste gypsum using existing cement kiln equipment, requires minimal modification, has low investment costs, and enables the cascade utilization of CO waste gas and kiln waste heat, reducing overall energy consumption by more than 30% compared to traditional processes.

A method for regenerating carbon dioxide and hydrogen sulfide from acid gases using a catalyst containing a Group 2 element is provided. This method reduces the energy required for the regeneration process, enabling an efficient and cost-effective method for regenerating acid gases.

The invention discloses a system and a process for preparing hydrogen sulfide by a continuous acid-base method and performing enhanced waste acid vulcanization. The system comprises a primary gas generator, a premixing device, a primary vulcanization reactor, a secondary gas generator, an enhanced mixing device, a secondary vulcanization reactor and a saline water discharge pump, the bottom of the first-stage gas generator is connected with the second-stage gas generator in series, the first-stage gas generator is sequentially communicated with the premixing device and the first-stage vulcanization reactor, the first-stage vulcanization reactor is provided with a first-stage circulating pump in a matched mode, an outlet of the first-stage circulating pump is communicated with the enhanced mixing device, and high-speed fluid at the outlet of the first-stage circulating pump enters the enhanced mixing device; high negative pressure is locally generated in the reinforced mixing device, and unreacted hydrogen sulfide in the second-stage gas generator, the first-stage vulcanization reactor and the second-stage vulcanization reactor is introduced and mixed. The invention provides a system which is stable in gas production, high in utilization rate of raw materials and hydrogen sulfide, good in vulcanization reaction treatment effect, small in equipment size, high in automation degree and low in investment cost.

Systems and methods for NH3 purification using a sour water feed stream with a higher concentration of NH3 than H2S to produce a purified acid gas stream, a purified NH3 vapor stream and an environmentally safe stripped water stream without adding more acid and / or base.

The utility model relates to an integrated device for preparing hydrogen sulfide through self-circulation drainage catalytic reduction. The integrated device comprises a catalytic reduction section (1), a Venturi jet device and a product gas backflow unit (7), the catalytic reduction section (1) is provided with an SO2 reduction catalyst packing layer, raw material gas is sprayed into the device through a raw material gas inlet at a high speed at a subsonic flow speed, sulfide product gas obtained by catalytic reduction conversion of SO2 is partially refluxed by negative pressure generated under high-speed jet flow and flows out through an outlet (4) of the venturi type jet device, and the tail gas of the venturi type jet device is discharged through an outlet (5) of the venturi type jet device. And the mixed gas is fully mixed with raw material gas and then drained to the bottom of the catalytic reduction section (1), and high-concentration hydrogen sulfide product gas is prepared through efficient reduction conversion of SO2 under the action of a catalyst based on the reverse disproportionation reaction principle of sulfur. Compared with the prior art, operation energy consumption can be reduced, economic and environmental benefits are improved, and good application and popularization prospects are achieved.

A process for substantially removing hydrogen sulfide from an ammonium sulfate solution. The process involves maintaining the pH of the solution to a range that optimally removes entrained hydrogen sulfide. The hydrogen sulfide is then reacted with sulfites, bisulfites, or sulfur dioxide to form ammonium thiosulfate.

The invention discloses a sulfur vapor recovery device and a sulfur vapor recovery method. The device comprises a sulfur melting tank, a liquid sulfur recovery device, a temperature regulator, a liquid sulfur recovery tank and a synthesis tower, the sulfur melting tank is respectively connected with the liquid sulfur recovery device and the synthesis tower; one end of the thermolator is connected with the top of the synthesis tower, the other end of the thermolator is connected with the liquid sulfur recovery tank, and the other end of the liquid sulfur recovery tank is connected with the middle of the synthesis tower. And the recovered sulfur steam finally flows back into a reaction or storage device for generating the sulfur steam in a liquid sulfur form, so that the intermediate process is reduced, and the operation stability of the device is improved.