| 摘要 |
A reactor comprises a plurality of triple tubes having reaction tube (8), inner tube (9) and central tube (10) and disposed in a main body (2) of the reactor (1), a first supply port (151) formed in the main body (2) and communicated with the central tube (10), and a second supply port (152) formed in the main body (2) and communicated with an annular space (12) of triple tubes. The raw material introduced from the first supply port (151) is fed into the catalyst layer to permit the reaction of the raw material to take place, and that as the activity of the catalyst is gradually lowered, the quantity of raw material to be fed to the first supply port (151) is correspondingly reduced, and the quantity of raw material corresponding to this reduction of raw material is fed from the second supply port (152) to the catalyst layer charged in the annular space (12). <IMAGE> |
