| 摘要 |
The method comprises: (a) treating straw with an alkaline solution (e.g caustic soda (NaOH), Na2CO3, KOH or K2CO3) having a pH of 10 to 14, at 20°C to 80°C, for 6 to 30 hours (preferably pH14, 80°C, 12 h); (b) separating excess alkaline solution from the treated straw; and (c) maintaining the treated straw in an anaerobic environment at 30°C to 45°C, for 6 to 30 hours (preferably 35°C, 12 h) to produce an intermediate straw product. A method for extracting cellulose fibres from straw to produce paper pulp comprises the steps of adding water and pulping the straw, filtering the pulped straw to extract cellulose fibres, refining the filtered pulp straw in a refiner to extract further cellulose fibres, screening the pulp to separate lignin and/or ash and washing the screened pulp with water to separate more lignin and/or ash. The container 6 for processing straw according to the methods described may contain a holder 30 for the straw, an inlet of introducing the alkaline solution, on outlet for removing excess alkaline solution, a second outlet for removing the air, a heater 18 and a level indicator. |
