process for converting carbon based materials, such as crude oil, its residues and related products and lower viscosity or more hydrogenated products

摘要

A process for converting into lighter viscosity products the heavy fractions of petroleum or other hydrocarbon containing components comprises the use of steam and catalysts, at least one of which is prepared by treating an alcoholic solution of alkali metal hydroxide with hydrogen sulphide. The bottom and top fractions from the catalytic treatment may be each subjected to catalytic treatment.