蓝桉CTMP浆DTPA置换螯合预处理及H_2O_2单段置换漂白的研究  

DTPA displacement chelating pretreatment of eucalyptus CTMP pulp and single-stage H_20_2 displacement bleaching

作　　者：张晓丽[1] 刘书钗[1] 

机构地区：[1]西北轻工业学院,陕西咸阳712081

出　　处：《中华纸业》2002年第2期23-27,共5页China Pulp & Paper Industry

基　　金：十二家"九五"科技攻关(编号:97-619-01-02);华南理工大学制浆造纸工程国家重点实验室资助项目。

摘　　要：对蓝桉ＣＴＭＰ浆用 ＤＴＰＡ进行置换螯合预处理，得出了 ＤＴＰＡ置换螯合的最佳条件为：ＤＴＰＡ用量 ０．３％，ＰＨ７．０，温度７０℃。通过对蓝桉ＣＴＭＰ浆Ｈ２Ｏ２单段置换漂白的研究，得出了最佳的操作 条件为药液流速１０ｍｌ／ｍｉｎ，置换后的静止时间为 １５ｍｉｎ，抽吸漂液、挤压后再静止 １５ｍｉｎ，用 ２００ｍｌ水量进行置换洗涤。置换漂白的工艺参数为：Ｈ２Ｏ２用量５～１５ｇ／ｌ，ｐＨ１０．８，温度７０℃， Ｎａ２ＳｉＯ３３．３３ｇ／ｌ，ＭｇＳＯ４０．０５６ｇ／ｌ。Ｈ２Ｏ３用量为５ｇ／ｌ时，白度可达７７．１４％ＩＳＯ；Ｈ２Ｏ２用量为１５ｇ／ｌ时， 白度可达８１．After the DTPA displacement chelating pretreatment of eucalyptus CTMP pulp, the results show that the best conditions of DTPA displacement chelating are as follows: DTPA charge was 0.3%, pH 7.0 and temperature 70℃ Through the research of single-stage H202 displacement bleaching for eucalyptus CTMP, we got the best operation conditions as follows: speed of liquor was 10 ml/mm, kept still after displacement for 15 mi then washing the pulp with 200 ml water. The technological parameters for displacement bleaching are: H202 concentration 5-15 g/l, pH 10.8, temperature 70, Na2SiO3 concentration 3.33 g/l, MgS040.056 g/l. Under these conditions, the brightness will reach 77.14% ISO an H2O2concentration of 5 g/l; and it can improve the brightness to 80.00% ISO at an H 2O2 concentration of 15 g/l.

关 键 词：造纸 制浆 蓝桉CTMP浆 DTPA置换螯合预处理 H2O2单段置换漂白 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]