Mixed organometallic compositions comprising the elements of groups of the iron and lanthanides, and the application of said compositions as additives for fuels or motor fuels

摘要

A mixed organometallic composition suitable for use as fuel additives contains an organic acid salt of at least one metal from the lanthanide group and of at least one metal selected from the group formed by manganese and the metals of the iron group wherein the ratio of total number of metal atoms to number of organic acid equivalents is greater then the stoichiometric proportion, and preferably greater than 2.