Method for treating lignin and for producing a binder composition
US10301437B2 · kind B2 · utility
4Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2014 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Nov 25, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N3/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for treating lignin, wherein the method comprises the following steps: a) dissolving lignin into an aqueous composition, which contains a compound selected from the class of phenols and alkali, while keeping the temperature of the composition at 40-85° C., wherein the alkali comprises a hydroxide of an alkali metal; and b) heating the composition at a temperature, which is higher than the temperature of the composition in step a), with the proviso that the temperature of the composition does not exceed 100° C., while keeping the pH of the composition at a pH value of 6-14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.