GAS REPLACEMENT PROCESS, GAS REPLACEMENT APPARATUS, AND NITRO COMPOUND HYDROGENATION REACTION PROCESS
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United States of America
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Dec 16, 2021
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Oct 17, 2019
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Oct 17, 2019
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Abstract
A gas replacement process and a gas replacement apparatus are employed, in the nitro compound hydrogenation reaction process. The gas replacement process at least includes a first step of subjecting a stream to be replaced to the gas replacement in presence of a first replacement gas, and then a second step of subjecting to the gas replacement in presence of the second replacement gas. Assuming the superficial velocity of the first replacement gas is V1, and the superficial velocity of the second replacement gas is V2, then V2/V1≥1.5.
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