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适用范围：ISO 302:2015 specifies a method for the determination of the Kappa number of pulp. The Kappa number is an indication of the lignin content or bleachability of pulp. ISO 302:2015 is applicable to all kinds of chemical pulps and semi-chemical pulps within the Kappa number range 1 to 100. For pulps with a Kappa number exceeding 100, use the chlorine-consumption procedure (ISO 3260) to describe the degree of delignification. To achieve the greatest precision and accuracy, the sample size has to be adjusted so that the consumption of permanganate falls between 20 % and 60 % of the amount added. NOTE There is no general and unambiguous relationship between the Kappa number and the lignin content of pulp. The relationship varies according to the wood species and delignification procedure. All compounds oxidized by KMnO4, not only lignin, will increase the consumption of KMnO4, and thereby increase the Kappa number.[8] If the Kappa number is to be used to derive an index of pulp lignin content, specific relationships will have to be developed for each pulp type.
发布日期： 2015-08-01
实施日期： 2015-08-01
中标分类号： Y30 - 轻工、文化与生活用品 - 造纸综合
ICS分类号： 85.040 - 造纸技术 - 纸浆
标准组织： ISO - 国际标准化组织标准
全文来源： WF
英文关键词： Bleaching Chemical Definitions Degree of delignification Descriptions Determination Hardness Interpretations Kappa number Lignin Lignin concentrate Paper Paper pulp Preparation Pulp Reagents Sampling methods Testing
语种： 汉语
页数： 12
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