Effect of pH Control with Acetic Acid/Sodium Acetate Buffer on Hot-water Extraction of Poplar Wood  

作　　者：Yanru Liua Yingjuan Fu Zhiyong Shao Fengshan Zhang Menghua Qin 

机构地区：[1]Key Laboratory of Pulp&Paper Science and Technology of the Ministry of Education,Qilu University of Technology,Jinan 250353,Shandong,China [2]Huatai Group Corp.Ltd.,Dongying,Shandong,257335,China [3]Organic Chemistry Laboratory,Taishan University,Taian 271021,Shandong,China

出　　处：《Journal of Bioresources and Bioproducts》2018年第1期9-13,共5页生物质资源与工程（英文）

基　　金：the National Natural Science Foundation of China(31540009 and 31370581);the Independent Innovation and Achievements Transformation Project of Shandong Province(2014CGZH0302);the Yellow River Mouth Scholar Program(DYRC20120105).

摘　　要：Poplar wood chips were extracted in an acetic acid/sodium acetate(SA/AA)buffer solution at 180ºC for 60 minutes,with a solid-to-liquid ratio of 1:6,to investigate the effect of pH on the extraction performance in terms of chemical compositions of the extract.The pH was controlled by varying the concentrations of sodium acetate and acetic acid in the buffer system.Results showed that the SA/AA system could promote the dissolution of hemicellulose,obtaining more oligosaccharides and monosaccharides,and could also inhibit the excessive decomposition of monosaccharides.When extracting poplar wood chips in a SA/AA system of pH=3.7,the yield of oligosaccharides was the highest,while the contents of furfural and hydroxymethyl furfural decreased by 25%and 30%,respectively,compared to conventional water extraction systems.Moreover,the amount of lignin extracted in the S/AA process was also higher than that in a conventional hot water extraction process.

关 键 词：Hot-water extraction Acetic acid/sodium acetate buffer POPLAR OLIGOSACCHARIDE Degraded by-products 

分 类 号：O62[理学—有机化学]