A New Method of Rice Straw Oxygen-Weak Alkali Pulping
2023-12-21 03:07:43
In order to protect the forest resources and reduce the impact on the environment, scientists at the University of Tokyo in Japan have developed a new technology for the production of pulp from rice straw. This technology enables rice straw to achieve a more complete delignification in the pulping process, while the removal of silicon. At the very least, oxygen-weak alkali pulping can achieve this goal.
The silicon removal rate, carbohydrate retention rate and delignification rate during the straw-oxygen-Na2S03 and oxygen-NI-LOH pulping were tested, and compared with the straw caustic soda method and oxygen-NaOH pulping. The results showed that straw-oxygen-NaaS03 pulping, when sufficient delignification was achieved, there was no large amount of silicon in the cooking waste liquid and the pulp yield was high. When the delignification reached 95%, the pulp yield reached 80%. Above, this is due to the fact that more cellulose and hemicellulose are retained in the pulp.
In contrast, using oxygen-NI-LOH pulping, although pulp can also retain more silicon, the pulp yield is low due to significant degradation of cellulose and hemicellulose during the oxygen-N1-LOH pulping process. . Therefore, the use of straw oxygen-Na2SO3 pulping is a new method for producing high-yield pulp.
The silicon removal rate, carbohydrate retention rate and delignification rate during the straw-oxygen-Na2S03 and oxygen-NI-LOH pulping were tested, and compared with the straw caustic soda method and oxygen-NaOH pulping. The results showed that straw-oxygen-NaaS03 pulping, when sufficient delignification was achieved, there was no large amount of silicon in the cooking waste liquid and the pulp yield was high. When the delignification reached 95%, the pulp yield reached 80%. Above, this is due to the fact that more cellulose and hemicellulose are retained in the pulp.
In contrast, using oxygen-NI-LOH pulping, although pulp can also retain more silicon, the pulp yield is low due to significant degradation of cellulose and hemicellulose during the oxygen-N1-LOH pulping process. . Therefore, the use of straw oxygen-Na2SO3 pulping is a new method for producing high-yield pulp.
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