The role of peroxide species in the carbohydrate degradation during oxygen bleaching .1. Factors influencing the reaction selectivity between carbohydrate and lignin model compounds

被引:18
作者
Yasumoto, M
Matsumoto, Y
Ishizu, A
机构
[1] Laboratory of Wood Chemistry, Department of Forest Products, University of Tokyo, Bunkyo-ku, Tokyo 113
关键词
D O I
10.1080/02773819608545785
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
A cellulose model compound, methyl beta-D-glucopyranoside (MGP), was subjected to oxygen-alkali treatment in the presence of various kinds of lignin model compounds. Only in the presence of a lignin model compound reactive with oxygen, a significant degradation of MGP was observed and the rate and the extent of its degradation were strongly dependent on the structure and the amount of a lignin model compound. Depression of MGP degradation was found to be achieved by two clearly distinguished mechanisms. One is an enhancement of the degradation of a lignin model compound without the acceleration of MGP degradation and the other is a depression of MGP degradation without significantly deteriorating the degradation of a lignin model compound. An increase in oxygen pressure and a 10% methanol addition belonged to the former case and a change in the ratio of metal ions and a 1% methanol addition belonged to the latter case. The addition of magnesium sometimes resulted in the acceleration of MGP degradation, depending on its ratio to iron.
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页码:95 / 107
页数:13
相关论文
共 19 条
[1]   STABILIZATION OF IRON-CATALYZED HYDROGEN-PEROXIDE DECOMPOSITION BY MAGNESIUM [J].
ABBOT, J ;
BROWN, DG .
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1990, 68 (09) :1537-1543
[2]  
ABRAHAMSON K, 1974, SVEN PAPPERSTIDN, V77, P693
[3]  
Aoyagi T., 1975, MOKUZAI GAKKAISHI, V21, P532
[4]  
ERICSSON B, 1971, SVEN PAPPERSTIDN, V74, P757
[5]  
GIERER J, 1990, HOLZFORSCHUNG, V44, P387
[6]   THE REACTIONS OF HYDROXYL RADICALS WITH AROMATIC RINGS IN LIGNINS, STUDIED WITH CREOSOL AND 4-METHYLVERATROL [J].
GIERER, J ;
YANG, E ;
REITBERGER, T .
HOLZFORSCHUNG, 1992, 46 (06) :495-504
[7]   ON THE SIGNIFICANCE OF THE SUPEROXIDE RADICAL (O-2 RADICAL-ANION/HO2) IN OXIDATIVE DELIGNIFICATION, STUDIED WITH 4-T-BUTYLSYRINGOL AND 4-T-BUTYLGUAIACOL .4. THE MECHANISM OF AROMATIC RING-OPENING [J].
GIERER, J ;
YANG, EQ ;
REITBERGER, T .
HOLZFORSCHUNG, 1994, 48 (05) :405-414
[8]  
GIERER J, 1990, HOLZFORSCHUNG, V44, P395
[9]   DEGRADATION OF METHYL BETA-D-RIBOPYRANOSIDE AND METHYL BETA-D-XYLOPYRANOSIDE BY OXYGEN IN AQUEOUS SODIUM-HYDROXIDE SOLUTION [J].
HEARNE, DO ;
THOMPSON, NS ;
SCHROEDER, LR .
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 1991, 11 (03) :307-327
[10]  
HOSOYA S, 1980, MOKUZAI GAKKAISHI, V26, P118