A kind of vapor phase method contains ethene and/or propylene gas system ethylbenzene and/or propyl benzene product separating technique

A kind of vapor phase method contains ethene and/or propylene gas system ethylbenzene and/or propyl benzene product separating technique

  • CN 104,341,264 B
  • Filed: 08/08/2013
  • Issued: 02/16/2018
  • Est. Priority Date: 08/08/2013
  • Status: Active Grant
First Claim
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1. a kind of vapor phase method contains ethene and/or propylene gas system ethylbenzene and/or propyl benzene product separating technique, it is characterised in that bagInclude following step:

  • 1) the gas phase alkylation reaction product come out from alkylation reaction device and the dealkylation reaction product come out from dealkylation reaction deviceEnter benzene column respectively or after mixing;

    2) the benzene column top gas phase materials after separating enter in absorption tower after the extraction of benzene column tower top, and reaction end gas is from absorption after absorptionTower top is discharged, and absorption tower materials at bottom of tower returns to benzene column;

    3) the benzene column upper aqueous phase material after separating is the recycle benzene of recovery, extracts out from benzene column tower top or is extracted out above benzene column sideUsed afterwards as reaction with benzene, reaction is divided into alkylation reaction benzene and dealkylation reaction benzene with benzene, and alkylation reaction is with benzene through addingDereaction part after hot vapour;

    4) benzene column materials at bottom of tower is accordingly isolated several in toluene, ethylbenzene, propyl benzene, diethylbenzene, high-boiling components through later separation towerOr all.

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