A utilização de perácidos na deslignificação e no branqueamento de polpas celulósicas

Química Nova

Lilian Borges Brasileiro²  Jorge Luiz Colodette¹  Dorila Piló-veloso¹ 

[1] ,Universidade Federal de Minas Gerais Colégio Técnico Belo Horizonte MG

关键词: peracids;    pulp bleaching;    delignification;   

DOI  :  10.1590/S0100-40422001000600020

来源: SciELO

【 摘 要 】

Peracids are strong oxidant species and their use is being largely studied in the delignification and cellulose pulp bleaching. Some of them has already an industrial application, specially in non-conventional bleaching sequences like ECF (Elemental chlorine free) and TCF (Totally chlorine free). This review presents the main aspects of the structure, properties, preparation and reaction of peracids (peracetic acid, peroxymonosulfuric acid and their mixture) with lignin, specially for peracetic acid. Information about bleaching and delignification of wood pulps with peracids and the factors affecting its efficiency are also presented.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License