首页>
外国专利>
Pre-treatment of lignocellulosic pulp with magnesium and calcium compound before peroxide bleaching
Pre-treatment of lignocellulosic pulp with magnesium and calcium compound before peroxide bleaching
展开▼
机译:过氧化物漂白前用镁和钙化合物预处理木质纤维素浆
展开▼
页面导航
摘要
著录项
相似文献
摘要
Lignocellulosic pulp (I) is (i) acid treated at pH upto 5 (ii) treated with a complexing agent then (iii) a calcium and a magnesium cpd. added to the pulp at 3.5-9 pH followed by (iv) bleaching with a peroxide contg. cpd. at 7-13 pH. Stages (i) of (iii) may be in any order.
展开▼