MECHANISM OF CHLORATE FORMATION IN CHLORINE DIOIXDE DELIGNIFICATION

编号 zgly0000334467

文献类型 期刊论文

文献题名 MECHANISM OF CHLORATE FORMATION IN CHLORINE DIOIXDE DELIGNIFICATION

学科分类 220.5570;林产化学加工学

作者 Byung-HoYoon  Li-JunWangI  Se-JongKim 

作者单位 DepartmentofPaperScienceandEngineering  KangwonNationalUniversity  200-701  Chunchon  Kangwon  SouthKorea 

母体文献 天津科技大学学报 

年卷期 2004,19(A01)

页码 62-66

年份 2004 

分类号 TS74 

关键词 去木质作用  氯酸盐  二氧化氯  次氯酸  漂白  木质素 

文摘内容 The effect of pH on chlorate formation duringchlorine dioxide delignification of oxygen delignifiedkraft pulp was studied. Chlorate formation was foundto increase slightly when pH was increased from 1.8to 2.5, further increase of pH decreased chlorateformation.The above phenomenon is explained by thecombination of two mechanisms, one by the reactionbetween hypochlorous acid and chlorite, another bythe effect of chlorine on the regeneration of chlorinedioxide. The first mechanism suggests that chlorateformation is highly dependent on HC10concentration which decreases with increasing pHand causes chlorate formation to behave in the sametrend. The second mechanism suggests that chlorinefavors the regeneration of chlorine dioxide whileHCIO favors chlorate formation, thus lowering thepH from about 4 to the acidic end should decreaseschlorate formation. Thethe maximum formation2.5。