Method for the isolation of olefin oligomerization products and the decomposition of oligomerization catalyst residues

摘要

The invention relates to the production of olefin oligomers by a method of oligomerization of olefins, and, in particular, to a method of isolating olefin oligomerization products and decomposing the oligomerization catalyst residues. The method of isolating products of an oligomerization reaction of olefins including a terminal double bond, in which the reaction is carried out by the action of a catalyst having chromium compounds, a nitrogen-containing ligand and organoaluminum compounds, includes a step of isolating independent olefin products and a step of treating catalyst residues. Further, the method includes the following sequential steps:
a) isolating at least one liquid product of the oligomerization reaction of olefins from an output stream of an oligomerization reactor;b) treating a residue with an aqueous solution of an acid; andc) separating an organic layer and an aqueous layer.

主权项

1. A method for isolating products of an oligomerization reaction of olefins comprising a terminal double bond, wherein the reaction is carried out in an aliphatic hydrocarbon solvent, by the action of a catalyst comprising chromium compounds, a nitrogen-containing ligand and organoaluminum compounds, said method comprising a step of isolating individual olefin products and a step of treating catalyst residues, characterized in that the method comprises the following sequential steps:
a) isolating at least one liquid product of the oligomerization reaction of olefins from an output stream of an oligomerization reactor; b) treating a residue formed in the isolating step of a) with an aqueous solution of an acid, the residue comprising a bottom residue after isolation of the liquid product and optionally the solvent; and c) separating an organic layer, and an aqueous layer that are formed in the treating step of b), the organic layer comprising heavy reaction products and optionally the solvent, and the aqueous layer comprising catalyst residues.