Fractionation of oil obtained by pyrolysis of lignocellulosic materials to recover a phenolic fraction for use in making phenol-formaldehyde resins
A method is provided for fractionation of oil obtained by pyrolysis of lignocellulosic materials to obtain useful chemical fractions, including a phenolic fraction which is suitable as a total or partial replacement for phenol in making phenolformaldehyde resins. The method comprises mixing the oil with a strong base such as sodium hydroxide to a ph level at which the neutral fraction of the oil is selectively soluble in a solvent such as methylene chloride or ether, and the mixture is extracted with the solvent to obtain a first extract containing the solvent and the neutral fraction, and a first raffinate containing the remaining fractions of the oil, I.E., the phenolic fraction, the organic acids fraction and an amorphous residue. The neutral fraction is recovered by distillation and the first raffinate is mixed with sulfuric acid to lower its ph to a level at which the phenolic fraction is selectively soluble in the solvent. This raffinate is extracted with the solvent to obtain a second extract containing the solvent and the phenolic fraction and a second raffinate containing the organic acids and the residues. The phenolic fraction is recovered by distillation and the second raffinate is mixed with sulfuric acid to lower its ph to a level at which the organic acids are selectively soluble in the solvent. After separation of the residues, the second raffinate is extracted with the solvent to obtain a third extract which is distilled to recover the organic acids fraction of the oil. The phenolic fraction may be used as partial or total replacement for pure phenol in making phenol-formaldehyde resins.
- Assignee:
- American Can Co
- Patent Number(s):
- US 4209647
- OSTI ID:
- 6449031
- Resource Relation:
- Patent File Date: Filed date 22 Jun 1978; Other Information: PAT-APPL-918040
- Country of Publication:
- United States
- Language:
- English
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ORGANIC WASTES
MATERIALS RECOVERY
WOOD WASTES
LOW BTU GAS
PHENOLS
PYROLYSIS PRODUCTS
PYROLYTIC OILS
AROMATICS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROXY COMPOUNDS
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OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
RECOVERY
SOLID WASTES
SYNTHETIC FUELS
WASTE MANAGEMENT
WASTE PROCESSING
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320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management