Patent · US Active

Method for producing solid lignin

US10239904B2 · kind B2 · utility

0Cited by

4References

19Claims

0Family size

Assignee

Valmet Technologies Oy · FI

Inventors

Eric Enqvist · Helsinki, FI
Ville Tarvo · Helsinki, FI
Panu Tikka · Helsinki, FI
Tobias Wittmann · Berlin, DE
Henrik Wallmo · Hagfors, SE
Anders Littorin · Mörbylånga, SE

Key dates

Filing date	Oct 12, 2016
Grant date	Mar 26, 2019
Priority date	—
Expiry date	Oct 12, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08H6/00
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

Lignin-rich starting material is suspended in a first medium, which is acidic and aqueous, to form a aqueous acidic suspension, which is heated and allowed to form two continuous phases, a thermoplastic lignin phase and an aqueous phase. The thermoplastic lignin phase is separated from the aqueous phase and passed through a shape giving process into a second medium which is at a temperature lower than that of the thermoplastic lignin phase and in which the thermoplastic lignin phase is essentially insoluble. Solid lignin formed in the second medium is recovered.

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