Shell Oil Comapny

Ernst J Sudholter

Swan T Sie

Martin F Post

Johannes K Minderhoud

C.sub.4.sup.- hydrocarbons are converted into syngas with a H.sub.2 /CO molar ratio between 0.25 and 2.25 by reforming at a pressure above 10 bar in the presence of specified amounts of carbon dioxide and steam followed by conversion of the syngas into C.sub.5.sup.+ hydrocarbons over a cobalt-containing catalyst or a catalyst combination comprising a cobalt-containing catalyst and having CO-shift activity.

Process for the preparation of hydrocarbons

A two-step process is disclosed wherein C.sub.9.sup.+ hydrocarbons are prepared from C.sub.4.sup.- hydrocarbons by steam reforming followed by Fischer-Tropsch synthesis over a special cobalt-containing catalyst. Yields of C.sub.9.sup.+ hydrocarbons are increased by recycling a gaseous fraction comprising unconverted H.sub.2 and CO as well as C.sub.8.sup.- hydrocarbon by-products and steam to the steam reformer.

Process for the preparation of hydrocarbons from a mixture of CO and H.sub.

Process comprising reforming, synthesis, and hydrocracking

C.sub.5.sup.+ hydrocarbons are prepared from C.sub.4.sup.- hydrocarbons by a two-stage process comprising steam reforming followed by Fischer-Tropsch synthesis over a special cobalt-containing catalyst; a gaseous fraction comprising unconverted H.sub.2 and CO as well as C.sub.4.sup.- hydrocarbons and CO.sub.2 formed as by-products is separated from the synthesized product and recycled to the steam reformer.

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Amsterdam, Netherlands

Ernst J Sudholter