Production method for paraxylene and ethylbenzene

Production method for paraxylene and ethylbenzene

  • CN 105,085,136 A
  • Filed: 05/05/2014
  • Published: 11/25/2015
  • Est. Priority Date: 05/05/2014
  • Status: Active Application
First Claim
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1. produce a method for p-Xylol and ethylbenzene, comprise the following steps:

  • (1) by mixed C 8aromatic hydrocarbons carries out liquid phase adsorption separation, is separated p-Xylol wherein, obtains p-Xylol and inhales excess oil;

    (2) (1) step gained suction excess oil is passed into the adsorbent bed of pressure-swing absorption apparatus as raw material and carry out the separation of gas phase pressure-variable adsorption, obtain the gentle phase fractionation by adsorption of ethylbenzene and inhale excess;

    (3) (2) step gained Gas Phase Adsorption is separated suction excess and passes into the bed that isomerization catalyst is housed with gas phase state, under 0.4 ~ 5.0MPa, 200 ~ 420 DEG C of conditions, carry out isomerization reaction, then make reacting rear material desorption.

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