Inhibitor adding head fraction tower operation

Inhibitor adding head fraction tower operation

  • CN 104,922,923 A
  • Filed: 03/21/2014
  • Published: 09/23/2015
  • Est. Priority Date: 03/21/2014
  • Status: Active Application
First Claim
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1. an equipment, described equipment comprises:

  • Head fraction column, described head fraction column is arranged to accept crude product nitrile feed stream and distillation crude product nitrile feed stream, and produces at the head fraction column overhead stream comprising HCN at head fraction column top and the head fraction column bottom liquid comprising acrylonitrile product bottom head fraction column;

    Overhead system, described overhead system comprises head fraction column condenser, condensation head fraction column overhead stream is arranged to by described head fraction column condenser, to provide the head fraction column overhead stream of condensation, HCN reservoir vessel, HCN user or at least one in disposing are arranged to the head fraction column overhead stream of condensation to be at least partially delivered to head fraction column as reflux stream by reflux pipeline and/or are delivered to described overhead system;

    WithAcid add-on system, described sour add-on system is arranged to acid to join entrance, to remain on acid concentration predetermined in the HCN end-product of head fraction column condenser downstream, with remain on acid concentration predetermined in head fraction column bottom liquid, wherein said entrance is selected from the entrance of head fraction column condenser, the entrance of reflux pipeline, the entrance of head fraction column and is positioned at the entrance of relief condenser of head fraction column condenser downstream.

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