Process for fractionating fast-pyrolysis oils, and products derived therefrom
AssigneeMidwest Research Institute
InventorsHelena L. Chum, Stuart K. Black
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Abstract
A process is disclosed for fractionating lignocellulosic materials fast-prolysis oils to produce phenol-containing compositions suitable for the manufacture of phenol-formaldehyde resins. The process includes admixing the oils with an organic solvent having at least a moderate solubility parameter and good hydrogen The United States Government has rights in this invention under Contract No. DE-AC02-83CH10093 between the United States Department of Energy and the Solar Energy Research Institute, a Division of the Midwest Research Institute.
Claims31
A process for fractionating fast-pyrolysis oils from biomass materials to produce phenolic compounds/neutral fractions extract, wherein the neutral fractions have molecular weights of 100 to 800;
- said extract being substitutable for a part of the phenol in phenol-formaldehyde resins, said process comprising:
- admixing said oils with an organic solvent having a solubility parameter of approximately 8.4-9.1 polar components in the 1.8-3.0 range and hydrogen bonding components in the 2-4.8 range;
- separating the organic solvent-soluble fraction containing the phenolic compounds/neutral fractions from said mixture and admixing it with water to extract water-soluble materials therefrom;
- separating the organic solvent-soluble fraction from said water fraction and admixing said solvent fraction with an aqueous alkali metal bicarbonate solution to extract strong organic acids and highly polar compounds from said solvent fractions;
- and
- separating the residual organic solvent-soluble fraction and removing the organic solvent therefrom to produce said phenolic compounds/neutral fractions extract.
A process for producing a combined phenolic compounds/neutrals fraction extract from
- fast-pyrolysis of lignocellulosic materials comprising:
- separating raw fast-pyrolysis oils into a carbohydrate-derived aqueous fraction and a phenolic-rich ethyl acetate soluble fraction by admixing an ethyl acetate solvent with said oils to extract the ethyl acetate-insoluble fraction;
- separating the ethyl acetate-soluble fraction and washing it with water to further extract-soluble carbohydrates and derived polar compounds;
- separating the ethyl acetate-soluble fraction and washing it with an alkali metal bicarbonate solution to extract the ethyl acetate-soluble strong organic acids and highly polar compounds from said ethyl acetate fraction;
- and
- separating said ethyl acetate fraction containing phenolic compounds/neutrals fraction, and evaporating the ethyl acetate solvent to produce a combined phenolic compounds/neutrals extract.
A process for fractionation of components of fast-pyrolysis oils comprising adding an ethyl acetate solvent to the oils to extract phenolic compounds/neutrals fraction into an ethyl acetate-soluble fraction, washing the ethyl acetate-soluble fraction first with water to extract water-soluble carbohydrates and polar compounds therefrom, extracting the ethyl acetate-soluble strong organic acids and highly polar compounds with a sodium bicarbonate solution, separating the ethyl acetate-soluble fraction containing a phenolic compounds/aromatic neutrals fraction, and evaporating the ethyl acetate solvent to produce a combined phenolic compounds/neutrals fraction composition.
Dependencies are inferred from the claim text.