METHOD OF PRODUCING BUTENE-1 Russian patent published in 2011 - IPC C07C11/08 C07C2/08 C07C2/26 B01J21/06 B01J21/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing butene-1 via dimerisation of ethylene at pressure 0.5-4 MPa and temperature 50-95°C in the medium of a hydrocarbon solvent in the presence of a catalyst system consisting of trialkyl aluminium - AlR₃, in which R is a hydrocarbon radical containing 1-6 carbon atoms, titanium etherate - Ti(OR)₄, in which R is a hydrocarbon radical containing 2-6 carbon atoms, in the presence or absence of a modifier - ether. At the end of the dimerisation reaction, a catalyst deactivator is fed into the reactor or into the reaction mass when the reaction mass comes out of the reactor, where the catalyst deactivator used is monoalkyl ethers of ethylene glycol.

EFFECT: use of the method increases selectivity of the process and purity of butene-1, lowers the probability of secondary reactions such as isomerisation of butene-1 into cis- or trans-butene-2, reduces the degree of polymerisation, improves working conditions and improves economic performance of the process.

3 cl, 11 ex, 2 tbl