Polyoxometalates in Oxidative Delignification of Chemical Pulps: Effect on Lignin
Polyoxometalates in Oxidative Delignification of Chemical Pulps: Effect on Lignin
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DOI：
10.3390/ma3031888
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发表时间：
2010-03-16
期刊：
影响因子：
3.4
通讯作者：
Atalla R
中科院分区：
文献类型：
--
作者：
Bujanovic B;Ralph S;Reiner R;Hirth K;Atalla R
化学纸浆是通过木质纤维素如木材或一年生非木本植物的化学脱木质素而生产的。在制浆（例如，硫酸盐法制浆）时，通过漂白除去剩余的木质素，以生产高质量、光亮的纸。漂白的目标是从纸浆中去除木质素，而不会对纤维素产生负面影响;因此，脱木质素应以高度选择性的方式进行。传统氯基漂白技术的新型环保替代品（例如，氧、臭氧或过氧化物漂白）。为了寻找能够模拟高选择性木质素降解酶的作用并适用于工业条件的无机试剂，研究人员将重点放在聚氧乙烯酸盐（POM）上，用作可再生氧化还原试剂（在厌氧条件下）或氧化脱木质素的催化剂（在有氧条件下）。本文的目的是回顾这两个过程中聚甲醛脱木素的基本概念。
Chemical pulps are produced by chemical delignification of lignocelluloses such as wood or annual non-woody plants. After pulping (e.g., kraft pulping), the remaining lignin is removed by bleaching to produce a high quality, bright paper. The goal of bleaching is to remove lignin from the pulp without a negative effect on the cellulose; for this reason, delignification should be performed in a highly selective manner. New environmentally-friendly alternatives to conventional chlorine-based bleaching technologies (e.g., oxygen, ozone, or peroxide bleaching) have been suggested or implemented. In an attempt to find inorganic agents that mimic the action of highly selective lignin-degrading enzymes and that can be applicable in industrial conditions, the researchers have focused on polyoxometalates (POMs), used either as regenerable redox reagents (in anaerobic conditions) or as catalysts (in aerobic conditions) of oxidative delignification. The aim of this paper is to review the basic concepts of POM delignification in these two processes.