Method of producing olefins from hydrocarbons

Details Method of producing olefins from hydrocarbons Method of producing olefins from hydrocarbons

C - Chemistry, Metallurgy

07

C

260/708.7

C07C 11/02 (2006.01) B01J 12/00 (2006.01) B01J 19/26 (2006.01) C10G 9/36 (2006.01) C10G 47/22 (2006.01)

Patent

CA 1137522

78R24 ABSTRACT METHOD OF PRODUCING OLEFINS FROM HYDROCARBONS A method of producing high yields of olefins from hydrocarbon feedstocks which is particularly applicable to heavy hydrocarbons. In accordance with the present method, a stream of gaseous oxygen is introduced into a first reaction zone and a cocurrent flow of hydrogen is introduced about the periphery of the gaseous oxygen stream, the hydrogen being introduced at a temperature at which it will spontaneously react with the oxygen. The hydrogen and oxygen are introduced in amounts to provide a gas stream of reaction products having an average temperature within the range of from about 1000° to 2000°C and which comprises a major amount of hydrogen and a minor amount of water vapor. The gas stream so produced is introduced into a second reaction zone and impinged upon a stream of a hydrocarbon which is heated to a temperature in excess of its melting point but below the temperature at which any substantial coke or tar forms. The gas stream is introduced at a high velocity and in an amount to provide a flowing reaction mixture having a temperature within the range of from 800° to 1800°C. The flowing mixture is maintained at that temperature for a time of from about 1 to 10 milliseconds to form olefins. Thereafter, the flowing mixture is rapidly quenched to arrest the reaction and the olefin products are recovered. -23-

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