Purification method for biological feedstock
AssigneeNeste Oyj
InventorOlli Visuri
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Abstract
The present disclosure is related to an apparatus and method for purification of biological feedstock, such as reducing or removing nitrogen containing compounds therein. The method can include subjecting the feedstock to a first separation step for obtaining a first fraction containing free fatty acids and nitrogen containing compounds, and collecting the residue containing acylglycerols. The first fraction is reacted with glycerol to obtain acylglycerols from the free fatty acid therein. This fraction is subjected to a second separation step for obtaining a second fraction containing nitrogen containing compounds, which is discharged as waste-product. The remains from the second separation contain formed acylglycerols and are collected.
Claims25
A method for purifying a biological feedstock containing acylglycerols, free fatty acids and nitrogen containing compounds, the method comprising:
- a) subjecting the biological feedstock to a first separation step and separating from said biological feedstock a first fraction containing free fatty acids and nitrogen containing compounds, and collecting residue containing acylglycerols;
- b) collecting the separated first fraction and reacting said first fraction in a reaction step with glycerol to obtain acylglycerols from the free fatty acid;
- c) feeding said first fraction after said reaction step to a second separation step and separating a second fraction containing nitrogen containing compounds, which is discharged as a waste-product;
- and
- d) collecting remains from said second separation step containing formed acylglycerols, to obtain a purified biological feed containing collected acylglycerols from step a), containing reduced amount of free fatty acids and nitrogen containing compounds compared to the biological feedstock.
Dependencies are inferred from the claim text.