Importance

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Abstract

A reactor for gas-phase reaction having a catalyst-unloading structure, comprising: a vertical center pipe for feeding a raw material gas; an annular space around the pipe for containing a catalyst; vertical heat exchanger tubes in the space; a means for collecting a product gas outside the space; an opening for unloading the catalyst at the bottom of the pipe; and an inner cylinder contacting with the inner surface of the pipe slidably for preventing the catalyst passage from passing through the opening, wherein, the cylinder has throughholes of a size allowing no passing of the catalyst on its periphery; a support ring for supporting the cylinder is provided at the lower end of the pipe; the cylinder is inserted inside the pipe and placed on the support ring; and the cylinder is equipped with a means for pushing the cylinder upward to open the opening.

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First Claim