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AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsSiqing ZHONG, Jun XU, Le ZHAO, Lianghua WU
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The present invention relates to a nitro compound hydrogenation reaction process and hydrogenation reaction apparatus, which can achieve the objects of the continuous reaction of the nitro compound and the long-period run of regeneration and activation. The nitro compound hydrogenation reaction process comprises a hydrogenation step, a regeneration step, an optional activation step and a recycling step. There exists at least one step of degassing the spent catalyst between the hydrogenation step and the regeneration step. According to circumstances, there exists at least one step of degassing the regenerated catalyst between the regeneration step and the activation step.
A nitro compound hydrogenation reaction process, comprising a hydrogenation step, a regeneration step, an optional activation step and a recycling step, which is characterized in that in the hydrogenation step, a nitro compound (especially nitrobenzene) as the reaction raw material is contacted with hydrogen gas and a hydrogenation catalyst in a reactor (referred to as hydrogenation reactor, preferably a fluidized bed reactor) to obtain a reaction product (for example an amino compound, especially aniline) and a spent catalyst, in the regeneration step, the spent catalyst is regenerated in a reactor (referred to as regeneration reactor, preferably a fluidized bed reactor) to obtain a regenerated catalyst, in the optional activation step, the regenerated catalyst is activated in a reactor (referred to as activation reactor, preferably a fluidized bed reactor) to obtain an activated catalyst, in the recycling step, the regenerated catalyst and/or the activated catalyst are recycled (preferably recycled with a lifting pipe) to the hydrogenation step, wherein there exists at least one step of degassing the spent catalyst (referred to as hydrogenation degassing step) between the hydrogenation step and the regeneration step, and (1) in the case that the activation step exists, there exists at least one step of degassing the regenerated catalyst (referred to as first regeneration degassing step) between the regeneration step and the activation step, optionally there exists at least one step of degassing the activated catalyst (referred to as activation degassing step) between the activation step and the recycling step, and optionally there exists at least one step of degassing the regenerated catalyst (referred to as second regeneration degassing step) between the regeneration step and the recycling step, or (2) in the case that the activation step is absent, there exists at least one step of degassing the regenerated catalyst (referred to as third regeneration degassing step) between the regeneration step and the recycling step.
A hydrogenation reaction apparatus of the nitro compound, comprising a hydrogenation reactor (preferably a fluidized bed reactor), a regeneration reactor (preferably a fluidized bed reactor), an activation reactor (preferably a fluidized bed reactor) and a recycling unit (for example a lifting pipe), the hydrogenation reactor is communicated with the regeneration reactor via at least one spent catalyst degasser through transportation pipelines, the regeneration reactor is communicated with the activation reactor via at least one regenerated catalyst degasser through transportation pipelines, the activation reactor is communicated with the recycling unit through transportation pipelines or communicated with the recycling unit via at least one activated catalyst degasser through transportation pipelines, the recycling unit is communicated with the hydrogenation reactor through transportation pipelines, wherein the solid particle inventory (the unit is kg) of the hydrogenation reactor:
Dependencies are inferred from the claim text.