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A PROCESS FOR MAINTAINING A CATALYST PARTICLE SIZE DISTRIBUTION IN A REACTION SYSTEM BY SELECTIVELY REMOVING UNDESIRABLY SIZED CATALYST PARTICLES FROM A REACTION SYSTEM
A PROCESS FOR MAINTAINING A CATALYST PARTICLE SIZE DISTRIBUTION IN A REACTION SYSTEM BY SELECTIVELY REMOVING UNDESIRABLY SIZED CATALYST PARTICLES FROM A REACTION SYSTEM
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机译:通过从反应系统中选择性去除不需要的催化剂颗粒来维持反应系统中催化剂颗粒尺寸分布的方法
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摘要
The present invention provides various processes for selectively removing undesirably sized catalyst particles from a reaction system. In one embodiment, a plurality of catalyst particles, having a first median particle diameter, is withdrawn from the reaction system and is directed to a separation unit such as a counter flow cyclone separator. In the separation unit, the particles are separated into a small catalyst stream and a large catalyst stream, the small catalyst stream having a second median particle diameter less than the first median particle diameter, and the large catalyst stream having a third median particle diameter greater than the first median particle diameter. At least a portion of the small or large catalyst stream is then directed back to the reaction system in order to maintain a desirable particle size distribution therein.
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