Method for producing renewable base oil and renewable fuel components
AssigneeNeste Oyj
InventorsJukka Myllyoja, Jaana Kanervo, Jaana Makkonen, Marja Tiitta
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Abstract
The present disclosure relates to methods for producing renewable base oil and other valuable renewable fuel components from a feedstock of biological origin comprising free fatty acids and glycerides. The feedstock is first separated to two or more effluent streams containing a fatty acid fraction and glyceride fraction. The glycerides are hydrolyzed to free fatty acids and glycerol, and the fatty acids thus obtained are recycled to the separating. The fatty acids are then converted to the base oil by ketonisation, hydrodeoxygenation and hydroisomerisation. The glycerol is converted to propanols by selective hydrogenolysis.
Claims39
A method for producing a renewable base oil fulfilling the API Group III base oil specifications, having ≥90 wt % saturated hydrocarbons, ≤0.03 wt % sulfur and a viscosity index of ≥120, and renewable fuel components from a feedstock of biological origin, wherein the method comprises:
- a) providing a feedstock containing free fatty acids and glycerides;
- b) separating the feedstock to at least two effluent streams containing:
- (i) a first effluent stream containing free fatty acids;
- and
- (ii) a second effluent stream containing glycerides;
- c) hydrolyzing the glycerides of the second effluent stream to provide free fatty acids and glycerol;
- and
- d) recycling the free fatty acids obtained in step c) to the separating step b);
- wherein at least part of the first effluent stream containing free fatty acids is subjected to ketonization reaction to produce a ketone containing stream, and wherein the ketone containing stream is subjected to hydrodeoxygenation reaction to yield a product comprising the renewable base oil.
Dependencies are inferred from the claim text.