Method for recovering and using lignin in adhesive resins by extracting demethylated lignin

Patent · Tue Jun 04 00:00:00 EDT 1991

OSTI ID:5524227

Schroeder, H A

This patent describes a method for employing demethylated lignin dissolved in demethylated lignin-containing aqueous solution to produce an adhesive. It comprises mixing a demethylated lignin-containing aqueous solution with a polar, partially water immiscible organic solvent to form a demethylated lignin-containing aqueous solution/organic solvent mixture; allowing the demethylated lignin-containing aqueous solution/organic solvent mixture to form at least two phases wherein at least one of the at least two phases is an aqueous phase and at least one of the at least two phases is an organic solvent phase which contains at least a portion of the demethylated lignin which was contained in the demethylated lignin-containing aqueous solution; separating the aqueous phase from the organic solvent phase; recovering the demethylated lignin contained in the organic solvent phase; and mixing the recovered demethylated lignin with an alkaline material, an aldehyde and an adhesive filter in order to produce an adhesive.

• Assignee: Colorado State Univ. Research Foundation, Ft. Collins, CO (United States)
• Patent Number(s): US 5021531; A
• Application Number: PPN: US 7-483247
• OSTI ID: 5524227
• Resource Relation: Patent File Date: 20 Feb 1990
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
09 BIOMASS FUELS
LIGNIN
RECOVERY
ADHESIVES
AQUEOUS SOLUTIONS
EXTRACTION
METHYLATION
ORGANIC SOLVENTS
RESINS
CARBOHYDRATES
CHEMICAL REACTIONS
DISPERSIONS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SOLUTIONS
SOLVENTS
400105* - Separation Procedures
090900 - Biomass Fuels- Processing- (1990-)