Thermal cracking process for producing olefins from hydrocarbons

Details Thermal cracking process for producing olefins from hydrocarbons Thermal cracking process for producing olefins from hydrocarbons

1984-02-27

1985-07-02

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By c content reduction, e.g., cracking, etc.

208107, 208129, 208130, 585652, C07C 404

Patent

active

045270031

ABSTRACT:
A thermal cracking process for producing olefins from hydrocarbons which comprises the steps of burning hydrocarbons with less than the theoretical amount of oxygen in the presence of steam to give a hot gas of from 1400.degree. to 300.degree. C. comprising steam and hydrogen prior to reaction; feeding to the hot gas comprising the steam and hydrogen, a mixture of methane and hydrogen so that the methane/hydrogen molar ratio in said hot gas is over 0.05; further feeding a starting hydrocarbon to the hot gas mixture comprising the methane, hydrogen and steam; subjecting the starting hydrocarbon to thermal cracking while keeping the partial pressure of hydrogen at least 0.1 bar at the outlet of a reactor, the temperature at 800.degree. to 1200.degree. C., and the residence time at 5 to 300 milliseconds; and quenching the resulting reaction product.

REFERENCES:
patent: 3579601 (1971-05-01), Kivlen
patent: 3718709 (1973-02-01), Simonetta
patent: 4134824 (1979-01-01), Kamm et al.
patent: 4264435 (1981-04-01), Read, Jr. et al.
patent: 4271008 (1981-06-01), Vogt et al.
patent: 4321131 (1982-03-01), Lowe

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