The improvement in the process of the parent Specification, in which fatty oils are converted into low boiling products suitable as motor fuels by heating their vapours at high temperatures in the presence of hydrogen and preferably catalysts, comprises heating the plants or fruits containing the oils in their original state without previous extraction. The plants &c. are preferably passed through a rotary furnace in the presence of hydrogen and the catalysts which may be mixed with the fruits in the form of aqueous solutions of their salts. In this manner 20 per cent of a quantity of soya beans is converted into an unsaponifiable oil boiling between 60 and 300 DEG C.ALSO:The improvement in the process of the parent Specification, in which fatty oils are converted into low-boiling products suitable as motor fuels by heating their vapours at high temperatures in the presence of hydrogen and preferably catalysts, comprises heating the plants or fruits containing the oils in their original state without previous extraction. The plants are preferably passed through a rotary furnace in the presence of hydrogen and the catalysts which may be mixed with the fruits in the form of aqueous solutions of their salts. In this manner 20 per cent of a quantity of soya beans is converted into a unsaponifiable oil boiling between 60 DEG and 300 DEG C.
