| 摘要 |
1. Method for enriching olefins derived from pyrolysis of petroleum hydrocarbons conducted in two technological sequences I and II, when in sequence I pyrogas is subjected to separation of C2 and C3 hydrocarbons, C2 hydrocarbons are sent for demethanisation, acetone absorption and acetylene fraction desorption, whereas in sequence II pyrogas is separated in a demethanisation - deethanisation - depropanisation configuration, and after deethanisation the C2 fraction is hydrogenated in a gaseous environment on a palladium catalyst, characterised in that after desorption conducted at a pressure of 0.06-0.08 MPa the acetylene fraction in a quantity of 1 mole per maximum 500 moles of pyrolysis products is directed to the pyrogas in technological sequence II prior to demethanisation, with mixing of the acetylene fraction and pyrogas streams taking place at a temperature of 300-310K at a pressure of 0.05 MPa, and then after deethanisation the mixture of C2 hydrocarbons is catalytically hydrogenated.<IMAGE>
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