Classified Separation of Lignin Hydrothermal Liquefied Products

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• 作者：Shimin Kang ; Xianglan Li ; Juan Fan ; Jie Chang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：October 5, 2011
• 年：2011
• 卷：50
• 期：19
• 页码：11288-11296
• 全文大小：1042K
• 年卷期：v.50,no.19(October 5, 2011)
• ISSN：1520-5045

文摘

Alkaline lignin was liquefied under hydrothermal conditions, and the liquefied products were effectively separated into four main types of substances: benzenediols, monophenolic hydroxyl products, weak-polar products, and water-soluble products (low-molecular-weight organic acids, alcohols, etc.). The production process and yield of each classified products are discussed. More than half of the yields of the oil products consisted of phenolics. A mechanism for phenolic production from lignin liquefaction is proposed. It suggests that the decomposition of lignin under hydrothermal conditions occurs mainly by three steps: hydrolysis and cleavage of the ether bond and the C鈥揅 bond, demethoxylation, and alkylation.