| 摘要 |
The invention relates to a method for producing fibrous material with a lignin content of at least 15% for softwood, at least 12% for hardwood, or at least 10% for annual plants, relative to the oven-dry fiber mass in each case, consisting of the following steps: production of a chemical solution comprising more than 5% chemicals (calculated as NaOH) for softwood, or comprising more than 3.5% chemicals (calculated as NaOH) for hardwood, or more than 2.5% for annual plants, relative to the oven-dry quantity of the wood in each case; mixture of the chemical solution with wood or annual plants in a predefined bath ratio; heating of the chemical solution and of the wood or the annual plants to a temperature higher than room temperature; and then either (1<SUP>st</SUP> alternative) removal of free-flowing chemical solution and pulping of the wood or the annual plants in the vapor phase, or (2<SUP>nd</SUP> alternative) pulping of the wood or the annual plants in the liquid phase, and separation of the free-flowing chemical solution and the wood or the annual plants. |
