Process for modifying bio-oil

Patent metadata

Field	Value
Publication number	US-10633605-B2
Application number	US-201414201215-A
Country	US
Kind code	B2
Filing date	Mar 7, 2014
Priority date	Mar 8, 2013
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

Disclosed is a process for modifying of bio-oil, the process including the steps where feedstock including bio-oil is allowed react with a reducing agent in at least one polar solvent, to obtain modified bio-oil. Also disclosed is the use modified bio-oil, obtainable by the process, as heating oil, as starting material in processes for producing fuels, fuel components, fine chemicals, chemical building-blocks, and solvents.

First claim

The invention claimed is:

1. A process for modifying of bio-oil, wherein said process comprises the steps of
a) dissolving a feedstock consisting of bio-oil selected from bio-oils obtained from thermal or hydrothermal processing of biomass, pyrolysis oils obtained from a pyrolysis process of biomass, and fractions and combinations thereof, in at least one polar solvent selected from C1-C10 alcohols and ethers,
b) reacting the feedstock consisting of bio-oil in the at least one polar solvent with a reducing agent selected from NaBH 4 and Na 2 O 4 S 2 to form a reduction reaction mixture; wherein carbonyl compounds in the bio-oil are reduced, and
c) obtaining modified bio-oil,
wherein the method further comprises separating the reducing agent from the reduction reaction mixture; where in separating the reducing agent from the reduction reaction mixture comprises subjecting the reduction reaction mixture to step d), wherein the at least one polar solvent 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.

2. The process according to claim 1 , wherein the polar solvent is selected from C1-C5 alcohols, tetrahydrofuran, diethyel ether, and any combinations thereof.

3. The process according to claim 1 , wherein the amount of the reducing agent/bio-oil is from 1:10 to 10:1 (w/w).

4. The process according to claim 1 , wherein reaction is carried out at a temperature from 20 to 200° C.

5. The process according to claim 1 , wherein the reaction is carried out under a pressure from normal atmospheric pressure NTP to 25 bar.

6. The process according to claim 1 , wherein the aqueous medium is selected from water, waste water streams, recirculated aqueous streams from the process or from another processes.

7. The process according to claim 1 , wherein the method further comprises processing the modified bio-oil product into a fuel, fuel component, fine chemicals, chemical building-blocks, and solvent.

8. The process according to claim 1 , wherein the polar solvent is methanol.

9. The process according to claim 2 , wherein the amount of the reducing agent/bio-oil is from 1:10 to 10:1 (w/w).

10. The process according to claim 1 , wherein the pyrolysis oil is obtained from slow pyrolysis, fast pyrolysis, catalytic pyrolysis, hydropyrolysis, supercritical fluid treatment of biomass, molten salt treatment of biomass, or ionic liquid treatment of biomass.

Assignees

• Upm Kymmene Corp

Inventors

• Asikkala Janne
• Gutierrez Andrea

Classifications

• C10L1/02 Primary

  essentially based on components consisting of carbon, hydrogen, and oxygen only · CPC title

• C07C29/147

  of carboxylic acids or derivatives thereof · CPC title

• C10G3/00

  Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids (production from non-melting solid oxygen-containing carbonaceous materials C10G1/00) · CPC title

• C10G21/28

  Recovery of used solvent · CPC title

• Y02P30/20

  using bio-feedstock · CPC title