| Popis: |
The hemp awn (Cannabis sativa) was delignified with the reaction mixture "acetic acid - hydrogen peroxide - sulfuric acid catalyst - water" at a sulfuric acid concentration of 0.45%, a liquid module of 6, and a temperature of 85°C. The influence of the concentration of hydrogen peroxide and the duration of the process on the yield, strength properties and whiteness of technical cellulose was studied. With a yield of about 45%, it is comparable to the properties of bleached sulphate cellulose from hardwood (OB-0 grade in accordance with GOST 14940-96) and without additional expensive bleaching can be used in the production of many high-quality mass types of paper. |
