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1. 发明授权

US4222818A Method for treatment of lignocellulosic material with chlorine 失效
标题翻译：用氯处理木质纤维素材料的方法
公开(公告)号：US4222818A
公开(公告)日：1980-09-16
申请号：US921370
申请日：1978-07-03
申请人： Johan Gullichsen , Frey V. Sundman
发明人： Johan Gullichsen , Frey V. Sundman
IPC分类号： D21C9/10 , D21C9/12 , D21C9/14
CPC分类号： D21C9/1026 , D21C9/12
摘要： A pulp containing lignocellulosic fibers is treated with chlorine in two steps. In the first step, chlorine in the amount of 0.6-0.9 grams per gram of lignin in the fibers, is mixed in the gaseous state into the pulp and in a second step the reaction products, which contain chlorinated lignin, are removed by displacing the liquid in the pulp with a chlorine solution, the amount of active chlorine in the solution in the second step being between 0.1 and 0.3 grams per gram of the lignin initially present in the pulp. In this manner 92% delignification is achieved without any intermediate washing between the two steps and with a total amount of chlorine between 0.7 and 1.2 grams per gram of lignin. The consistency of the pulp in both steps is the same and is between 6 and 12%.
摘要翻译：含有木质纤维素纤维的纸浆分两步处理氯气。在第一步中，纤维中每克木质素0.6-0.9克的氯以气态混合到纸浆中，在第二步中，含有氯化木质素的反应产物通过置换用氯溶液在纸浆中的液体，第二步溶液中活性氯的量为0.1至0.3克/克初始存在于纸浆中的木质素。以这种方式，在两步之间没有任何中间洗涤并且氯的总量在每克木质素0.7至1.2克之间达到92％的脱木质素。纸浆在两个步骤中的一致性相同，为6％至12％。

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