METHOD FOR ETHYLENE DIMERISATION IN BUTENE-1 USING COMPOSITION CONTAINING COMPLEX OF TITANIUM AND HETEROATOM FUNCTIONALISED ALKOXY LIGAND Russian patent published in 2015 - IPC C08F4/16 C07C11/08 C07C2/32 C07C2/36 

FIELD: chemistry.

SUBSTANCE: catalytic composition contains an organometallic complex of titanium of respective general formula [Ti(OR)_n(Y)_(4-n)], wherein: Y is a hydrocarbonyl radical containing from 1 to 30 carbon atoms, or a radical specified in a group consisting of halogenides, alkoxy R'O-, amido R'₂N- and carboxylates R'COO-, wherein R' is a hydrocarbyl radical, and n can have integral values from 1 to 4; ligand -OR is an organic compound specified in a family of alkoxy ligands, general structure of which is O-(CR¹⁰R¹¹)_n-X-L, wherein: functional group L is a group containing a heteroatom specified in nitrogen, oxygen, phosphorus, sulphur, arsenic and stibium, or an aromatic group; the group X is the hydrocarbon group (CR⁷R⁸), an oxygen atom or a group containing a nitrogen atom -NR⁹; the groups R⁷, R⁸, R⁹, R¹⁰ and R¹¹ mean a hydrogen atom or a hydrocarbon chain, either cyclic or noncyclic, containing from 1 to 30 hydrocarbon atoms and optionally a heteroatom; the above group (CR¹⁰R¹¹)n is specified among the following groups: -CH₂-, -(CH₂)₂-, -(CH₂)₃-, -(CH₂)₄-, -(CH₂)₅-, -C(CH₃)₂-, - C(CH₃)₂-CH₂, -C(CH₃)₂-CH₂-CH₂, -C(CF₃)₂-, -C(CF₃)₂-CH₂ and -C(CF₃)₂-CH₂-CH₂.

EFFECT: high selectivity of ethylene dimerisation and low portion of polyethylene as related to C4 product content.

8 cl, 2 tbl, 20 ex