Analysis of Long Cycle Operation of RAX-3000 Paraxylene Adsorbent
This article introduces a 600000 ton/a PX aromatics combined unit,which is the first to use RAX-3000 adsorbent in domestic.The adsorption performance of the RAX-3000 adsorbent has changed since its loading and use in 2013 until the end of its design service life.It is proposed that by adjusting the water volume of the adsorbent,strictly controlling the content of C9+and C10+aromatics in the feed,and reasonably controlling the reflux ratio in the second zone,the performance stability of the RAX-3000 adsorbent can be effectively ensured,Optimize the operation of the device and extend the service life of the adsorbent.
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