14 results about "Hydrogen sulfide synthesis" patented technology

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 invention provides a P and Mo modified Y type molecular sieve catalyst and a preparation method of tert-dodecyl mercaptan. The method comprises the following steps: performing P salt preliminary modification on a Y-type molecular sieve by adopting a water bath heating method to reduce strong acid central sites of the molecular sieve and increase the number of B acids, and the B acid sites can effectively adsorb S elements and enhance the activity of the molecular sieve to obtain a P-modified precursor; active metal molybdenum is deposited on the P-modified molecular sieve precursor through an electro-deposition method, Mo modification can perform dealumination on a molecular sieve framework, the Si / Al ratio is increased, the total acid density is reduced, and the desorption capacity of a product is improved; pulse electrodeposition is combined with a complexing agent to regulate and control nucleation and growth of molybdenum, deposited molybdenum salt is combined with the carrier on the surface of the molecular sieve in a high-dispersion single crystal or small cluster form, combination of metal and the carrier is enhanced, and the catalyst has good catalytic performance when applied to hydrogen sulfide addition reaction. The catalyst prepared by the method provided by the invention is suitable for synthesis of tert-dodecyl mercaptan by addition of hydrogen sulfide to tetra-polypropylene, and the product is high in yield and good in stability.

The utility model provides an emergency repair disinfestation device for a hydrogen sulfide synthesis system, which comprises a base, an alkali liquor storage tank, a first venturi tube, a second venturi tube and a circulating pump, the alkali liquor storage tank and the circulating pump are arranged on the base, the alkali liquor storage tank is divided into a first chamber and a second chamber through a partition plate, and the first chamber and the second chamber are arranged in the first venturi tube and the second venturi tube respectively. Two extension pipes are arranged at the upper part of the alkali liquor storage tank, the upper parts of the extension pipes are fixed at the upper part of the alkali liquor storage tank, and the lower parts of the extension pipes downwards extend to the lower parts of the first chamber and the second chamber respectively; and the lower part of the first Venturi tube is connected with the first chamber through an extension tube. After alkali liquor is fed into the first venturi tube and the second venturi tube through the circulating pump, a negative pressure area is generated in the venturi tubes, and after the negative pressure area is connected with a first-aid repair position, residual hydrogen sulfide at the first-aid repair position can be pumped out and neutralized through the alkali liquor, so that the effects of absorbing and removing harm are achieved, a large amount of time is not required to be consumed for purging and replacing, and the cost is reduced. The efficiency of maintenance operation is optimized, and the operation efficiency of the system is improved.

The utility model relates to the technical field of hydrogen sulfide emission, in particular to a hydrogen sulfide synthesis sulfur melting tank blow-down pipe convenient to clean, which comprises a reaction kettle and further comprises a transversely arranged connecting pipe communicated with one side of the reaction kettle, and one end of the connecting pipe is communicated with a bent pipe; the sleeve is communicated with the outer side of the bent pipe, a sealing plug is arranged at the top end of the sleeve, a sealing ring is arranged on the inner wall of the sleeve, and two first limiting blocks are fixed to the outer side of the sealing plug; hydrogen sulfide can be conveniently stored by arranging the reaction kettle, the hydrogen sulfide can be conveniently discharged by arranging the connecting pipe, the bent pipe and the blow-down pipe body in matched use, and the hydrogen sulfide can be conveniently discharged by arranging the sleeve, the sealing plug, the sealing ring, the first limiting block, the second limiting block and the clamping mechanism in matched use. According to the blow-down pipe, sulfur powder attached to the inner wall of the blow-down pipe can be conveniently cleaned, so that the service life of the blow-down pipe is prolonged, and meanwhile, the situation that a sulfur melting groove is on fire due to friction sparks caused by misoperation of personnel is prevented.

The utility model relates to the technical field of hydrogen sulfide synthesis, in particular to a hydrogen feeding and cooling device of a hydrogen sulfide synthesis tower, which comprises a first barrel and a second barrel, and further comprises a second cooling component arranged in the first barrel and capable of accelerating the hydrogen cooling speed, and the feeding assembly is arranged on one side of the second barrel and is used for conveniently inputting high-temperature hydrogen into the first barrel. The contact area with high-temperature hydrogen can be increased to the greatest extent through the second cooling assembly, so that heat exchange between the high-temperature hydrogen and the heat conduction cylinder is more thorough, and the contact area between the high-temperature hydrogen and the cooling component is further increased in cooperation with the first cooling assembly, so that heat brought into the hydrogen sulfide synthesis tower by the hydrogen is effectively reduced, and the service life of the hydrogen sulfide synthesis tower is prolonged. The temperature of a reactor bed layer is favorably controlled, and the condition of frequent overtemperature of the catalyst bed layer is avoided; and the second cooling assembly can be conveniently disassembled, assembled and overhauled through a limiting stud and a fastening bolt, and dirt on the outer side of the second cooling assembly can be conveniently cleaned and maintained.

The invention provides a method for improving the stability of a tert-dodecyl mercaptan catalyst and application of the tert-dodecyl mercaptan catalyst. The method comprises the following steps: step 1, dissolving a metal precursor and a functional additive in water or ethanol according to a certain molar ratio; 2, calculating the water absorption rate of the Y-type molecular sieve, placing the dried Y-type molecular sieve in the solution, and carrying out equivalent-volume impregnation, and 3, carrying out low-temperature drying on the impregnated Y-type molecular sieve obtained in the step 2, and then carrying out high-temperature roasting to obtain the modified Y-type molecular sieve. The catalyst prepared by the method provided by the invention is suitable for synthesis of tert-dodecyl mercaptan by addition of isododecene and hydrogen sulfide, has low requirements on olefin content of raw materials, and the obtained product has high yield and good stability and is suitable for industrial production.

The invention discloses a method for synthesizing 1-chloro-3-mercapto-2-propanol or bis (3-chloro-2 hydroxypropyl) sulfide based on regulation and control of hydrogen sulfide. The method comprises the following steps: premixing epichlorohydrin and alkali through a micro-channel continuous flow reactor; and St2) hydrogen sulfide and the solution obtained in the step St1) are introduced into a continuous flow reactor for a reaction, and 1-chloro-3-mercapto-2-propanol or bis (3-chloro-2-hydroxypropyl) sulfide is obtained by regulating and controlling the introduction amount of hydrogen sulfide. According to the method disclosed by the invention, 1-chloro-3-sulfydryl-2-propanol or bis (3-chloro-2-hydroxypropyl) sulfide can be selectively obtained by utilizing a continuous flow device and regulating and controlling the proportion of hydrogen sulfide. When hydrogen sulfide is regulated and controlled to synthesize the bis (2-hydroxyethylthio-2-hydroxypropyl) sulfide, the purity of the bis (2-hydroxyethylthio-2-hydroxypropyl) sulfide is greater than or equal to 98%, and the purity of 1-chloro-3-mercapto-2-propanol is less than or equal to 2%. 1-chloro-3-sulfydryl-2-propanol is synthesized on the basis of regulation and control of hydrogen sulfide, and the purity of 1-chloro-3-sulfydryl-2-propanol is larger than or equal to 90% compared with that of 1-chloro-3-sulfydryl-2-propanol synthesized by epoxy chloropropane and bis (trimethyl silicon sulfide).

The application discloses a method for hydrogen sulfide resource utilization by using kaolin modified molecular sieve, wherein the kaolin modified molecular sieve is prepared by the following steps: calcining kaolin at 700-800 DEG C, stirring and reacting the calcined kaolin in 3-5 mol / L H2SO4 solution, performing solid-liquid separation, washing the solid to neutral, drying, placing the dried product, tetrapropylammonium hydroxide and high fructose corn syrup in a high-pressure reaction kettle, adding ammonia water to adjust the pH to 9-10, and then reacting at 180-190 DEG C, performing solid-liquid separation, washing the solid, and then calcining the solid at 500-700 DEG C; the kaolin modified molecular sieve is applied to the synthesis of butyl mercaptan from butene and hydrogen sulfide, can simultaneously improve the conversion rate of isobutene and the selectivity of butyl mercaptan, and has good stability, still has good catalytic effect after being used for 53 h, and the service life of the catalyst is greatly improved, and the application provides a new way for the efficient synthesis of butyl mercaptan.

The invention discloses an arsenic removal system and an arsenic removal method suitable for non-equilibrium high-concentration arsenic-containing waste acid, and belongs to the technical field of environmental protection, the arsenic removal system comprises an arsenic-containing waste acid storage and conveying module, a hydrogen sulfide synthesis and conveying module and a sulfuration arsenic removal reaction module; the sulfuration arsenic removal reaction module comprises a plurality of sulfuration reactors which are connected in series; and the arsenic-containing waste acid storage and conveying module comprises a plurality of storage tanks arranged in parallel and the like. According to the device, the multiple storage tanks, the multiple gas regulating valves, the multiple microbubble generators and the like are arranged for communication, so that relatively stable output of the waste acid which is high in arsenic content, large in content fluctuation range and unbalanced is achieved, and the influence of the unbalanced characteristic of the arsenic-containing waste acid on the vulcanization arsenic removal effect is reduced; meanwhile, the accurate matching performance of the input hydrogen sulfide gas amount of the hydrogen sulfide gas continuous vulcanization precipitation system is improved, so that the effects of improving the arsenic removal rate, reducing the excess hydrogen sulfide rate and the like are achieved, and the defects in the prior art are overcome.

The invention relates to a method for synthesizing mercuric sulfide by an all-wet method, which adopts industrial crude mercury and a sodium sulfide purified solution as raw materials, takes a solution phase controllable reaction as a core, breaks through the bottlenecks in raw material limitation, reaction conditions, product regulation and environmental protection in the prior art, and aims to solve the problems that the prior art depends on a high-temperature or high-pressure environment, the reaction process is uncontrollable and the like. And through precise regulation and control of solution phase parameters, mild reaction conditions and controllable process are realized, and the method is suitable for application scenes such as electronics and medicines. Crystal form orientation is realized through dual control of crystallization rate and additives, beta-HgS is generated through rapid crystallization, and alpha-HgS is generated through slow crystallization; the problem of mercury pollution or other toxic gas pollution in actual operation is solved, a traditional method for synthesizing mercuric sulfide from mercury and sulfur or hydrogen sulfide is replaced, and a low-pollution and low-energy-consumption synthesis method is formed.

The application discloses a method for hydrogen sulfide resource utilization by using surfactant-induced modified zeolite to catalyze butene and hydrogen sulfide to synthesize butyl mercaptan. The surfactant-induced modified zeolite is prepared by the following steps: dissolving 0.3-0.4g of cetyl tripropyl ammonium bromide in 0.06-0.1mol / L of NaOH aqueous solution, then adding 1-1.2g of FAU type zeolite, stirring for 1-2h at room temperature, transferring the mixture into a high-pressure reaction kettle, heating for 30-90h at 150-170 DEG C, performing solid-liquid separation, calcining the solid at 500-700 DEG C for 3-5h, and then using an equal-volume impregnation method to place the calcined solid in a molybdate solution, standing, and drying to obtain the surfactant-induced modified zeolite. The catalyst has the advantages of good stability, good sulfur resistance and high selectivity, and the service life of the catalyst is greatly improved.

The invention discloses a device and a method for quickly removing arsenic from high-arsenic zinc-rich acid liquor, and belongs to the technical field of hydrometallurgy. The device specifically comprises a stock solution tank, a hydrogen sulfide synthesis system, a nitrogen supply system, a tail gas treatment system, a reaction kettle, a filter pressing system, a vulcanized liquid tank and a circulating pump, a gas-liquid coupling device is arranged on the upper middle portion in the reaction kettle, hydrogen sulfide gas and stock solution enter the reaction kettle through the gas-liquid coupling device, and after the hydrogen sulfide gas and stock solution reach a set liquid level, the reaction kettle is started; the pressure interval of a reaction system is gradually increased by opening and closing a pressure sensor at the top of the reaction kettle and a hydrogen sulfide inlet valve, and meanwhile, redundant arsenic sulfide slag is intermittently discharged, so that arsenic in a stock solution is efficiently removed, and zinc in the stock solution is almost not lost. The gas-liquid contact reaction efficiency is greatly improved through the double-spraying design of the gas-liquid coupling device in the stock solution feeding stage and the reaction solution circulating stage and intermittent deslagging of the reaction kettle.

The present invention discloses an application of a NiCe-SN catalyst in the resource-based synthesis of ethanethiol from hydrogen sulfide. The NiCe-SN catalyst is prepared by adding a gallium source during the preparation of SBA-15, placing the prepared molecular sieve in concentrated nitric acid to separate the gallium element from the skeleton to generate silanol nests, and then loading Ce and Ni on the molecular sieve. The catalyst has excellent anti-carbon deposition performance due to the confinement effect and the oxygen storage function of Ce. In the process of synthesizing ethanethiol from ethylene and hydrogen sulfide, the activity and stability of the catalyst are greatly improved compared with the Ga-SBA-15 catalyst, and the service life of the catalyst is extended.

This invention discloses a multi-effect synthesis apparatus and method for hydrogen sulfide synthesis. The apparatus has a vertical columnar structure, and its interior is arranged from bottom to top as follows: a first-effect liquid sulfur synthesis zone, a second-effect gas-liquid two-phase sulfur synthesis zone, a third-effect compensation synthesis zone, and a condensation and sulfur replenishment zone. The first-effect liquid sulfur synthesis zone is used for the main reaction of molten sulfur and hydrogen. The second-effect gas-liquid two-phase sulfur synthesis zone is used for the deep reaction of residual sulfur vapor and hydrogen. The third-effect compensation synthesis zone is used for the compensation catalytic synthesis of unconverted hydrogen and utilizes temperature drop to condense and reflux gaseous sulfur. The condensation and sulfur replenishment zone is equipped with a condensation coil for gradient cooling of the rising gas, causing gaseous sulfur to condense into liquid and fall for reuse. The top of the apparatus corresponding to the condensation and sulfur replenishment zone is equipped with a hydrogen sulfide gas outlet. This invention has the advantages of low energy consumption, high raw material conversion rate, high utilization rate of sulfur and hydrogen, and high purity of the produced hydrogen sulfide product.