Thermal cracking method for preparing olefins from hydrocarbons

Details Thermal cracking method for preparing olefins from hydrocarbons Thermal cracking method for preparing olefins from hydrocarbons

C - Chemistry, Metallurgy

07

C

260/708.7

C07C 11/04 (2006.01) C10G 47/22 (2006.01)

Patent

CA 1200563

ABSTRACT OF THE DISCLOSURE A thermal cracking method for producing olefins from hydrocarbons which comprises the steps of mixing said hydro- carbons with a mixed gas of methane and hydrogen in a methane/ hydrogen mol ratio of 0.2 or more; prior to reaction carrying out a thermal cracking reaction under conditions such that the total concentration of methane and hydrogen is at least 40 mol% or more at the outlet of a reactor, the partial pressure of said hydrogen is 3 bars or more, the temperature at the outlet of the reactor is from 800 to 1200°C, and the residence time in the reactors is from 5 to 300 milliseconds; and quenching the reaction product discharged through the outlet of the reactor.

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