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Process for the oligomerization of butenes

  • US 20060264686A1
  • Filed: 01/06/2006
  • Published: 11/23/2006
  • Est. Priority Date: 05/21/2005
  • Status: Abandoned Application
First Claim
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1. A process for the oligomerization of butenes in the presence of a transition metal catalyst, comprising oligomerizing a feedstock comprising a substantially water-free butene-containing hydrocarbon stream (1) in the presence of a transition metal catalyst, wherein said hydrocarbon stream (1) comprises predominantly butenes and has been obtained by separation from a stream of hydrocarbons (2) comprising saturated and unsaturated C4-hydrocarbons and having a lower content of butenes than hydrocarbon stream (1) by:

  • a) extractive distillation of stream (2) with a polar extractant to give an overhead fraction (3) which is enriched in saturated hydrocarbons and a bottom fraction (4) which is enriched in unsaturated hydrocarbons and comprises the polar extractant, b) separation of bottom fraction (4) by distillation to give an overhead fraction (5) which comprises butenes as unsaturated hydrocarbons and a bottom fraction (6) which comprises the polar extractant, c) scrubbing of at least part of the overhead fraction (5) with water or an aqueous solution and d) drying of the part of the overhead fraction (5) which has been treated in step c) to give a substantially water-free butene-containing hydrocarbon stream (1).

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