Method for preparing epoxypropane in microchannel reactor
A micro-channel reactor, propylene oxide technology, applied in chemical instruments and methods, chemical/physical/physical-chemical reactors, bulk chemical production, etc., can solve problems such as low conversion rate and selectivity, and danger of explosion , to achieve the effects of high conversion and selectivity, improved utilization, and high volume yield
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Embodiment 1
[0029] The propylene oxide synthesis method uses hydrogen, oxygen, and propylene as gas phase raw materials, nitrogen as a diluent gas, and does not use a liquid phase carrier. The microchannel reactor is made of polymethyl methacrylate. The cross section of the microchannel is square, with a side length of 200 microns and a length of 1 cm. The amount is 0.05% (w / w).
[0030] The whole set of equipment is at room temperature (about 20°C). The gas source in the laboratory test is a gas cylinder. The gas is decompressed to 0.1MPa through a pressure reducing valve, and the flow is controlled by a mass flow meter. Then enter the microchannel chip reaction unit. The product flowing out from the chip is separated from gas and liquid after cooling. The flow rates of the four gases in the gas phase entering the reaction zone are H 2 :O 2 :C 3 h 6 :N 2 =5sccm:5sccm:5sccm:10sccm, the corresponding volume ratio is 20:20:20:40. Where sccm is milliliters per minute under standard c...
Embodiment 2
[0033] According to the conditions and steps described in Example 1, the microchannel reactor is made of polymethyl methacrylate, the microchannel section is rectangular, 500 microns long, 200 microns wide, and 1 cm in length, and the inside is completely filled with The nano-Au catalyst loaded on the TS-1 carrier, the loading amount is 1% (w / w).
[0034] The whole set of equipment is at 100°C. The gas source in the laboratory test is a gas cylinder. The gas is decompressed to 0.5MPa through a pressure reducing valve, and the flow is controlled by a mass flow meter. Channel Chip Reaction Unit. The product flowing out from the chip is separated from gas and liquid after cooling. The flow rates of the four gases in the gas phase entering the reaction zone are H 2 :O 2 :C 3 h 6 :N 2 =5sccm:5sccm:5sccm:10sccm, the corresponding volume ratio is 20:20:20:40.
[0035] The conversion rate of propylene was 8.2% and the selectivity of propylene oxide was 91.5% as measured by an o...
Embodiment 3
[0037] According to the conditions and steps described in Example 1, the microchannel reactor is made of stainless steel grade SS316L. The cross section of the microchannel is an equilateral triangle with a side length of 200 microns and a length of 1 cm. The interior is completely filled with TS- 1 Nano-Au catalyst on a carrier with a loading of 5% (w / w).
[0038] The whole set of equipment is at about 300°C. The gas source in the laboratory test is a gas cylinder. The gas is decompressed to 1MPa through a pressure reducing valve, and the flow is controlled by a mass flow meter. Channel Chip Reaction Unit. The product flowing out from the chip is separated from gas and liquid after cooling. The flow rates of the four gases in the gas phase entering the reaction zone are H 2 :O 2 :C 3 h 6 :N 2 =5sccm 5sccm:5sccm:10sccm, the corresponding volume ratio is 20:20:20:40.
[0039] The conversion rate of propylene was 5.6% and the selectivity of propylene oxide was 84.3% as me...
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