Patent · US Active

Method for increasing the reactivity of lignin

US9464219B2 · kind B2 · utility

8Cited by

2References

18Claims

0Family size

Assignee

UPM-KYMMENE CORPORATION · FI

Inventors

Suvi Pietarinen · Lappeenranta, FI
Okko Ringena · Neusäß, DE
Kati Eskelinen · Imatra, FI
Sanna Valkonen · Lappeenranta, FI

Key dates

Filing date	Mar 28, 2013
Grant date	Oct 11, 2016
Priority date	—
Expiry date	Mar 28, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09J161/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a method for increasing the reactivity of lignin, wherein the method comprises the following steps: a) forming, under heating at a temperature of 30-70° C., an aqueous dispersion comprising alkali and lignin, wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the dispersion formed in step a) at a temperature of 50-95° C. for producing alkalated lignin.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.