| 摘要 |
<p>1307782 Catalyst regeneration PULLMAN Inc 19 April 1971 [17 June 1970] 25149/71 Heading B1F Spent hydrocarbon conversion catalyst is decarbonised with air in fluidised beds in two stages, separate streams of air being fed to each stage. Thus catalyst in fluidised bed 7, Fig. 1, is treated with air from 8, and the catalyst then passes to fluidised bed 4 where it is treated with a second air stream from conduit 11. In Fig. 2 (not shown) which comprises a three stage treatment, catalyst passes downwards successively through the treatment zone. (For Figure see next column)</p> |
