C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/641.4, 260/7
C07C 2/32 (2006.01) C07C 29/80 (2006.01) C07C 29/94 (2006.01) C07C 31/20 (2006.01)
Patent
CA 1155461
ABSTRACT Recovery of aliphatic diol solvent in a process wherein ethylene is oligomerized by contact with a solution of a nickel complex catalyst in the solvent to afford a reaction product made up of a) a liquid solvent phase containing dissolved catslyst, b) a liquid hydrocarbon phase comprising ethylene oligomers containing dissolved ethylene, catalyst and solvent and c) gaseous ethylene, the reaction product is separated into gaseous ethylene and diol solvent containing dissolved catalyst, a substantial portion of the separated solvent is recycled to the oligomer- ization zone and a minor portion of the separated solvent is fractionated to remove light ends and spent catalyst prior to reuse in the process, the formation of diol solvent degradation products in the diol solvent fractionation step being avoided by adding a minor amount of an alkali metal hydroxide to the fractionation zone.
369580
Shell Canada Limited
Smart & Biggar
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