Abstract：
:Hardwood 4-O-methylglucuronoxylans (MGX) are classically isolated by a delignification step, using a sodium chlorite solution, followed by alkaline extraction, an efficient, although potentially polluting process. In this work, we propose a chlorine-free environmentally-friendly process for MGX extraction from Castanea sativa Mill. Chestnut sawdust was first delignified using metalled phthalocyanine or porphyrin in presence of hydrogen peroxide. Then, MGX were easily extracted by hot water. This protocol, repeated with different incubation times and temperatures, led to the selective extraction of acetylated MGX with decent yields reaching 12%. The best results were obtained after delignification using iron tetrapyrrole macrocycles. However, lower degrees of polymerization of MGX were observed in comparison to the classical method, suggesting that this new process affects the structures of xylans.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Barbat A,Gloaguen V,Sol V,Krausz Pdoi
10.1016/j.biortech.2010.03.054subject
Has Abstractpub_date
2010-08-01 00:00:00pages
6538-44issue
16eissn
0960-8524issn
1873-2976pii
S0960-8524(10)00531-6journal_volume
101pub_type
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