A kind of preparation method of isopropyl mercaptan
A technology of isopropyl mercaptan and propylene, which is applied in the field of preparation of isopropyl mercaptan, can solve the problems of high equipment requirements, low yield of isopropyl mercaptan, difficult processing, etc., and achieve comprehensive utilization of resources and easy industrial transformation , the effect of preventing environmental pollution
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Embodiment 1
[0053] Hydrogen sulfide and propylene are fully mixed at a molar ratio of 1:1, pressurized to 0.2MPa by a compressor, and heated to 160°C by a heating furnace, according to the propylene volume space velocity of 400h -1 , into an adiabatic fixed-bed reactor equipped with a solid acid catalyst for reaction, the catalyst used is composed of 1% molybdenum oxide, 1% cobalt oxide, 5% ZSM-5 molecular sieve, and the rest is alumina carrier , the ZSM-5 molecular sieve has a silicon-aluminum molar ratio of 10, a grain size of 5 μm, a pore volume of 0.4ml / g, and a specific surface area of 137m 2 / g. The reaction effluent is cooled to 25°C by heat exchange, the gas phase is returned to the hydrogen sulfide feed, and the liquid phase is fractionated to obtain four products, isopropyl mercaptan, n-propylene mercaptan, isopropyl sulfide and n-propyl sulfide. Among them, the single-pass conversion rate of propylene is 80.2%, the selectivity of isopropyl mercaptan is 89.4%, and the total y...
Embodiment 2
[0058] Hydrogen sulfide and propylene are fully mixed at a molar ratio of 2:1, pressurized to 0.2MPa by a compressor, and heated to 180°C by a heating furnace, according to the propylene volume space velocity of 300h -1 , into an adiabatic fixed-bed reactor equipped with a solid acid catalyst for reaction, the catalyst used is composed of 5% molybdenum oxide, 2% nickel oxide, 2% phosphorus pentoxide, 5% ZSM-5 molecular sieve, and the rest is alumina carrier , the ZSM-5 molecular sieve has a silicon-aluminum ratio of 20, a grain size of 5 μm, a pore volume of 0.3ml / g, and a specific surface area of 141m 2 / g. The reaction effluent is cooled to 20°C by heat exchange, the gas phase is returned to the hydrogen sulfide feed, and the liquid phase is subjected to fractional distillation to obtain four products, isopropyl mercaptan, n-propylene mercaptan, isopropyl sulfide and n-propyl sulfide. Wherein the single-pass conversion rate of propylene is 86.3%, the selectivity of isopro...
Embodiment 3
[0063] Hydrogen sulfide and propylene are fully mixed at a molar ratio of 3:1, pressurized to 0.25MPa by a compressor, and heated to 200°C by a heating furnace, according to the propylene volume space velocity of 300h -1 , into an adiabatic fixed-bed reactor equipped with a solid acid catalyst for reaction, the catalyst used is composed of 8% molybdenum oxide, 5% nickel oxide, 4% phosphorus pentoxide, 8% ZSM-5 molecular sieve, and the rest is alumina carrier , the ZSM-5 molecular sieve has a silicon-aluminum ratio of 25, a grain size of 3 μm, a pore volume of 0.5ml / g, and a specific surface area of 168m 2 / g. The reaction effluent is cooled to 15°C by heat exchange, the gas phase is returned to the hydrogen sulfide feed, and the liquid phase is subjected to fractional distillation to obtain four products, namely, isopropyl mercaptan, n-propylene mercaptan, isopropyl sulfide and n-propyl sulfide. Wherein the single-pass conversion rate of propylene is 91.8%, the selectivity ...
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