褐藻酸
化学
山梨醇
有机化学
糖醇
木糖
催化作用
糖
水解
甘露醇
多元醇
生物化学
发酵
聚氨酯
作者
Chunghyeon Ban,Wonjin Jeon,Hee Chul Woo,Do Heui Kim
出处
期刊:Chemsuschem
[Wiley]
日期:2017-11-29
卷期号:10 (24): 4891-4898
被引量:9
标识
DOI:10.1002/cssc.201701860
摘要
Abstract Alginic acid, a major constituent of macroalgae, iss hydrogenated into sugar alcohols over carbon‐supported noble metals for the first time. Mannitol and sorbitol are the major products of the catalytic hydrogenation of alginic acid, which consists of two epimeric uronic acids. The main reaction pathway is the consecutive hydrogenations of the aldehyde and carboxyl ends of alginic acid dimers, followed by the cleavage of the C−O−C linkage into monomeric units by hydrolysis. The highest yield of C 6 sugar alcohols is 61 % (sorbitol: 29 %; mannitol: 28 %; galactitol: 4 %). The low sorbitol/mannitol ratio is in contrast to that from cellulose hydrogenation, owing to the composition of alginic acid and isomerization between sugar alcohols under the catalytic system. This new green route to producing sugar alcohols from alginic acid might provide opportunities to diversify biomass resources.
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