IMPROVING THE ECONOMICS OF EUCALYPTUS KRAFT PULP ECF BLEACHING

摘要：

Industrially made kraft pulps obtained by modified cooking process may contain 60～75 mmol/kg of HexA, which represents about 6～7.5 kappa units. HexAs do no react with oxygen and very little of it is actually removed across the oxygen delignification stage, causing low efficiencies in the range of 25%～35%. In this study, it is carried out an economical evaluation of ECF bleaching processes having none and double-stage oxygen delignification when applied to eucalyptus pulps of kappa varying in the range of 15～21.The bleaching processes include sequences containing specific stages for HexAs removal (Z, A/d and DHT). The results indicate that the use of oxygen delignification is not economically attractive, particularly for HexAs rich low kappa pulps, but processes without oxygen delignification are environmentally challengeable.

关键词： kraft pulp Hez A ozygen delignificationh

作者: Jorge L. Colodette Jose L. Gomide Dalton L. Junior Claudia M. Gomes

作者单位: Federal University of Vicosa, Vicosa, MG, Brazil

会议类型: 国际会议

会议名称: The 3rd International Symposium on Emerging Technology of Pulping and Papermaking(ISETPP)(第三届制浆造纸新技术国际研讨会)

会议地点: 广州

会议语种:英文

页码: 330-335

在线出版日期: 2006-11-08（万方平台首次上网日期，不代表论文的发表时间）