EP2129746 valid till 2027 in 19 EU Countries 

A process for the production of aliphatic and cyclic hydrocarbons. 

The invention relates to a process for the production of aliphatic and cyclic C1 to C25 hydrocarbons by catalytic deoxidisation of natural substances or mixtures thereof, in particular based on fatty acids, alcohols, saccharides, and lipids. Fats and waxes are preferred lipids.

The principle of deoxidation of natural substances (oils) or mixtures thereof based on fatty acids, alcohols, sugars and fats. The reaction within reactor is triggered by a strong electromagnetic and infrared radiation towards an approved mixture of the raw material and the deoxidising agent (e.g. asphalt). Radiation breaks down the original chemical structure of the substances and the oxygen is then removed from the original structure of raw material.

Can be used for the manufacture of alternative vehicle fuels and for other applications where petroleum-based products are used so far.



The reaction takes place in a single step, very fast and under normal pressure and temperature. The result of this reaction can be affected by the period of radicals in the reaction space. This is the tool for controlling of the final composition of hydrocarbon at the output from the production plant. 

Raw materials: fatty acids, alcohols, saccharides, lipids and their intermixtures.                  

Deoxidising agent: heavy petroleum fraction, (distillation residue from petroleum), mineral oils, - natural oils, melted natural fats and their intermixtures.

Output product/s:  The hydrocarbons produced are mainly mixtures of petrol and diesel fractions and these require further processing. They are not chemically pure or identical - their raw material is the same.


De-oxygenation cracking as the source of intermediate for automotive fuel production:


Thermal decomposition with subsequent de-oxygenation of the initial feedstock or animal or vegetable origin (vegetable oils, animal fats, etc.)  mixed with de-oxidising agent (especially residual petroleum fraction) comprises prompt decomposition of feedstock within a special reactor at temperatures of 300 - 400°C. Products are gaseous and liquid hydrocarbons C1 – C18,  the liquid ones are mainly saturated (alkanes) and unsaturated (alkenes) hydrocarbons,  or even residues of organic acids, traces of esters and other substances with their molecular mass lower than the feedstock molecular mass level. Gaseous products contain low-boiling hydrocarbons (C1 – C4, carbon dioxide, carbon monoxide, hydrogen), as well as a potential small amount of water and insoluble particles (coke).


The major product obtained that is the medium fraction at 160 to 380 dg. C, can be hydrogenated solely or conveniently mixed at a certain percentage ratio to enable the subsequent catalytic reaction and obtain high quality hydrocarbons fractions suitable for direct infusion into automotive diesel or mineral automotive fuels already containing the bio-element pre-defined by the EU directives. Alteration of conditions present during cracking and processing of pyrolysate within the DNS technology could also enable production of fractions from other distillation tiers, as required by the user.


The DNS process is designed for conversion of liquid animal or vegetable feedstock. The main feedstock portion is provided with the carbon donor in liquid form (e.g. atmospheric or vacuum distillation residue from petroleum, heavy petroleum oil), or solid particles (e.g. carbon black, fine ground coke powder). The mixture contains 90 - 95 % of feedstock and 5 -10 % of de-oxidising agent respectively.


Current status:  under development

Objective:          scale-up up to 144k t annually

Alternatively:     single step pre-treatment (no coolers), directly connected to hydrotreater