Method for producing 3-pentenenitrile

Method for producing 3-pentenenitrile

  • CN 1,914,154 B
  • Filed: 01/27/2005
  • Issued: 06/16/2010
  • Est. Priority Date: 01/29/2004
  • Status: Active Grant
First Claim
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1. method for preparing 3 pentene nitrile is characterized in that following process steps:

  • (a) on nickel (0) catalyzer of at least a homogeneous phase dissolved with the phosphorus part stabilization that is selected from phosphine class, phosphorous acid esters, phosphinic acid ester and phosphiinic acid ester, make 1,3-divinyl and prussic acid reaction, acquisition comprises 3 pentene nitrile, 2-methyl-3-crotononitrile, described at least a catalyzer and 1, the materials flow 1 of 3-divinyl(b) distillation materials flow 1 in tower obtains as the height-1,3-butadiene materials flow 2 of top product with as the low-1,3-butadiene materials flow 3 that comprises 3 pentene nitrile, described at least a catalyzer and 2-methyl-3-crotononitrile of bottoms,(c) distillation materials flow 3 in tower, obtain as top product the materials flow that comprises 1,3-butadiene 4, in the materials flow 5 that comprises 3 pentene nitrile and 2-methyl-3-crotononitrile of this side-tap of the column and as the materials flow that comprises described at least a catalyzer 6 of bottoms,(d) distillation materials flow 5 obtains as the materials flow 7 that comprises 2-methyl-3-crotononitrile of top product with as the materials flow that comprises 3 pentene nitrile 8 of bottoms,Condition is at processing step (b) with (c), and bottom temp was no more than 140 ℃ and

    the liquid phase mean residence time sum in processing step (b) and distillation plant bottom section (c) less than 10 hours.

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