(EP2774972) The present invention relates to a process for modifying of bio-oil, said process comprising the steps where feedstock comprising bio-oil is allowed react with a reducing agent in at least one polar solvent, to obtain modified bio-oil. The invention also relates to the use modified bio-oil, obtainable by said process, as heating oil, as starting material in processes for producing fuels, fuel components, fine chemicals, chemical building-blocks, and solvents.
(EP2774972) 1. A process for modifying of bio-oil, wherein said process comprises the steps where a) a feedstock consisting of bio-oil is reacted at a temperature from 20 to 200 °C, under a pressure from normal atmospheric pressure NTP to 25 bar, from 0.5 to 20h with a reducing agent selected from NaBH4 and Na2O4S2 in at least one polar solvent, and b) separating the reaction product from the reducing agent, the solvent and water to obtain the modified bio-oil. 2. The process according to claim 1, where in step a) a reduction reaction mixture is formed and said reduction reaction mixture is subjected to step c), where in the polar solvent(s) is separated from the reduction reaction mixture, a solvent free reaction mixture is formed and an aqueous medium is added to the solvent free reaction mixture, and water and reaction product formed of the reducing agent are separated. 3. The process according to claim 1, where in step a) a reduction reaction mixture is formed and said reduction reaction mixture is subjected to step d), where in an aqueous medium is added to the reduction reaction mixture, and water and solvent(s) and reaction product formed of the reducing agent are separated. 4. The process according to any one of claims 1-3, wherein the feedstock consisting bio-oil is selected from bio-oils, pyrolysis oils, any fractions of bio-oils, and any combinations thereof. 5. The process according to any one of claims 1-4, wherein the polar solvent is selected from C1-C10 alcohols, ethers and water and any combinations thereof. 6. The process according to any one of claims 1-5, wherein the amount of the reducing agent/bio-oil is from 1:10 to10:1 (w/w). 7. The process according to any one of claims 1-6, wherein reaction is carried out at a temperature from 20 to 200°C. 8. The process according to any one of claims 1-7, wherein the reaction is carried out under a pressure from normal atmospheric pressure NTP to 25 bar. 9. The process according to claims 2 or 3, wherein the aqueous media is selected from water, waste water streams, recirculated aqueous streams from the process or from another processes. 10. Use of the modified bio-oil product obtainable from the process according to any one of claims 1- 9 as heating oil, as starting material in processes for producing fuels, fuel components, fine chemicals, chemical building-blocks, and solvents.
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