7 results about "Hydrogen sulfide synthesis" patented technology

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 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 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 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.

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.