METHOD FOR ISOLATING PRODUCTS OF OLEGOMERIZATION OF OLEFINS AND DECOMPOSITION OF RESIDUES OF OLIGOMERIZATION CATALYST

摘要

The invention relates to the field of production of olefin oligomers, which are widely used as copolymers, raw materials for the preparation of oils and lubricants, as well as raw materials for the production of other chemical products. The invention relates to the production of olefin oligomers by the method of oligomerization of olefins, and in particular to a method for isolating the products of oligomerization of olefins and the decomposition of residues of the oligomerization catalyst. The method of separation of the products of the oligomerization reaction of olefins containing a terminal double bond carried out under the action of a catalyst comprising chromium compounds, a nitrogen-containing ligand and organoaluminum compounds, which contains the stage of separation of individual olefin products and the stage of processing of catalyst residues, characterized in that the following three consecutive operations: a) at least one liquid olefin oligomerization reaction product is isolated from the stream leaving the oligomerization reactor s; b) the residue is treated with an aqueous acid solution; c) the organic layer and the aqueous layer are separated. The application of the proposed method allows, firstly, to isolate the target reaction products, avoiding the ingress of impurities of foreign substances, such as alcohols, in the products and / or return solvent, and eliminates the need for separation of these foreign substances. Secondly, the application of the proposed method avoids contamination of lines and devices between the reactor and the distillation column by-product. Thirdly, this solution allows the separation of catalyst residues from the by-product polymer, which facilitates catalyst regeneration or recovery