CPC C10G 11/182 (2013.01) [C07C 4/06 (2013.01); C07C 2529/08 (2013.01); C07C 2529/40 (2013.01); C10G 2300/1044 (2013.01); C10G 2300/4093 (2013.01); C10G 2300/708 (2013.01); C10G 2400/20 (2013.01)] | 13 Claims |
1. A method of producing olefins, the method comprising:
preheating a hydrocarbon feed comprising C5 to C7 hydrocarbons to at least a temperature of 400° C. to form a preheated hydrocarbon feed;
mixing a catalyst with a gas comprising at least one member selected from the group consisting of methane and hydrogen to form a gas/catalyst mixture;
contacting the gas/catalyst mixture with the preheated hydrocarbon feed at reaction conditions sufficient to produce C2 to C4 olefins; and
mixing a hydrocarbon feedstock with a dry gas member selected from the group consisting of methane and hydrogen to dilute the hydrocarbon feedstock and form the hydrocarbon feed;
wherein the hydrocarbon feedstock is one member selected from the group consisting of light straight run naphtha and heavy straight run naphtha;
wherein the catalyst comprises a solid acid based zeolite catalyst selected from the group consisting of one or more medium pore zeolites, one or more large pore zeolites and combinations thereof;
wherein the zeolite catalyst is only modified by at least one member selected from the group consisting of desilication and steaming;
wherein the reaction conditions comprise a temperature in a range of 500 to 750° C. and pressure in a range of 0.5 to 5 bars;
wherein a weight ratio of dry gas/hydrocarbon feedstock in the hydrocarbon feed ranges from 20 to 100; and
wherein the catalyst is fresh.
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