Gas replacement process, gas replacement apparatus, and nitro compound hydrogenation reaction process
AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsSiqing Zhong, Jun Xu, Le Zhao, Lianghua Wu
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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.
Claims15
A degassing process, comprising a first degassing step for degassing a stream to be replaced in the presence of a first replacement gas;
- and
- a second degassing step for the degassing in the presence of a second replacement gas, wherein the superficial velocity of the first replacement gas (absolute value, the unit is m/s) is V1, the superficial velocity of the second replacement gas (absolute value, the unit is m/s) is V2, and 100≥V2/V1≥2.
Dependencies are inferred from the claim text.