Process for the preparation of alkanes with methane.

Process for the preparation of alkanes, characterized in that it comprises, as main stage, a reaction resulting from contacting methane with at least one other starting alkane (A) in the presence of a catalyst based on a metal M capable of catalysing a metathesis alkanes, which reaction results in the formation of at least one or two final alkanes (B) having a number of atoms or less carbon.