Process for integrated production of renewable fuels and chemicals
AssigneeNeste Oyj
InventorsMarja Tiitta, Jukka Myllyoja, Väinö Sippola
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Abstract
The present disclosure provides a versatile process for producing valuable renewable hydrocarbons from triglyceride containing feedstock. The triglyceride containing feedstock is first split to provide a mixture containing fatty acids, glycerol and water, from which a phase separation provides an oily phase, and an aqueous phase. The oily phase containing fatty acids is subjected to fractionation, whereby specific fractions may be refined to products with controlled hydroprocessing. Products may contain paraffinic renewable aviation fuel components, paraffinic renewable base oil, renewable paraffinic diesel fuel components, renewable paraffinic technical fluid, or any combination thereof.
Claims30
A process for producing renewable hydrocarbon components from triglyceride containing feedstock, said process comprising:
- a. hydrolyzing said triglyceride containing feedstock to provide a mixture containing fatty acids, glycerol and water;
- b. subjecting said mixture containing fatty acids, glycerol and water to a phase separation to recover an oily phase containing fatty acids, and an aqueous phase containing glycerol and water;
- c. subjecting said oily phase containing fatty acids to fractionation to provide a first fatty acid fraction containing at least 80%-wt of free fatty acids having a carbon chain length of C16 or less, of a total fraction weight, and a second fatty acid fraction containing free fatty acids having a carbon chain length of at least C17;
- d. subjecting said first fatty acid fraction to:
- hydroprocessing to provide a paraffinic renewable aviation fuel component, wherein hydroprocessing comprises hydrodeoxygenation and hydroisomerization, simultaneously or in sequence, or
- ketonisation before hydroprocessing to provide a paraffinic renewable base oil, or
- a combination thereof;
- e. subjecting said second fatty acid fraction to hydroprocessing, wherein hydroprocessing comprises hydrodeoxygenation and hydroisomerization, simultaneously or in sequence, to provide:
- a renewable paraffinic diesel fuel component,
- a renewable paraffinic technical fluid, or
- a combination thereof;
- f. recovering renewable hydrocarbon components, comprising renewable aviation fuel component and/or paraffinic renewable base oil, and a renewable paraffinic diesel fuel component and/or a renewable paraffinic technical fluid, as products from steps d and e;
- and
- subjecting said aqueous phase containing glycerol and water obtained from separation of step b, to a step g for producing propanols,
- wherein hydroprocessing conditions applied to the first fatty acid fraction in step d differ from hydroprocessing conditions applied to the second fatty acid fraction in step e.
Dependencies are inferred from the claim text.