GB372496A - Improvements in the hydrogenation of hydrocarbons - Google Patents

Abstract

In the destructive or refining hydrogenation of hydrocarbons boiling substantially between 60 DEG and 325 DEG C. and containing olefines and aliphatic and cyclic hydrocarbons which are more unsaturated than olefines, the formation of undesirable polymerization products is prevented by adding to the initial materials aromatic or saturated aliphatic hydrocarbons which are vaporous under the reaction conditions. The addition may be made in such amount that the reaction mixture contains not more than 3 per cent, and preferably less than 1,5 per cent, of hydrocarbons more unsaturated than olefines. Initial materials specified include benzines from cracked oil or from the low temperature carbonization of brown coal, or unsaturated middle oils; to these may be added saturated middle oils derived from mineral oils, or aromatic middle oils obtained by the destructive hydrogenation of tars above 500 DEG C. Suitable catalysts are metals of the 6th group, such as molybdenum, tungsten, chromium or their compounds, or cobalt or its compounds. An example of the production of an anti-knock benzine is given. Specifications 296,984, 327,194, 328,586, and 333,550, [all in Class 32, Distilling &c.], are referred to.