Apparatus and method for preparing aminobenzene by nitrobenzene gas-phase hydrogenation
A technology for the preparation of nitrobenzene gas and hydrogen, which is applied in the preparation of amino compounds, chemical instruments and methods, preparation of organic compounds, etc., to achieve the effects of reducing dosage, increasing safety, and reducing investment costs
Active Publication Date: 2004-09-15
TSINGHUA UNIV
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The invention discloses a device and method to prepare aniline by the nitrobenzene gas phase hydrogenization, and the device mainly includes a fluidized bed reactor set at the raw material gas inlet at the bottom of the reactor, a first gas distributor on the top of the gas inlet, a second gas distributor separating the reactor in the middle of axial height of the reactor into two catalyst dense phase regions, and heat exchangers in two catalyst dense phase regions; catalyst overflow device connected with two catalyst dense phase regions and gas-solid separator. It also discloses a method to prepare aniline by the device, mainly including: the steps of controlling the mol ratio of hydrogen gas to nitrobenzene, controlling the temperature in two catalyst dense phase regions, etc. It has advantages of large reactor operation flexibility, high nitrobenzene conversion, high aniline production selectivity, high product purity, etc.
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