| 摘要 |
A fluid-contacting process wherein fluid is contacted with convex and polylobal particles, the contacting stopped, a mixture of the particles formed and subsequently separated by screening. Also disclosed is a catalytic conversion process wherein a reaction is carried out in the presence of convex and polylobal catalysts, the reacting stopped, the catalysts withdrawn as a physical mixture from which one of the catalysts is separated, regenerated and returned to the process.
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