| 摘要 |
Process for the production of polyols comprising the steps i) preparing lignin from lignocellulosic material by pulping with alcohol, in particular with a C1-4 alcohol, in particular ethanol, isopropanol; water and a base (1), in particular a hydroxide, in particular Na OH, at a temperature below 100°C, in particular from 40°C to 90°C, in particular from 50°C to 70°C, ii) reacting lignin obtained in i) with an aliphatic saturated or unsaturated epoxide, in particular an alkylene oxide, in particular ethylene oxide or propylene oxide in the presence of a base (2), and iii) isolating the polyols obtained, the use of polyols obtained or obtainable by such process, and oxypropylated lignin obtained or obtainable by such process. |
