尾叶桉KP法制浆黑液中小分子酚类化合物的分离与GC-MS分析  

Separation and GC-MS Analysis of Low-molecular-weight Phenolic Compounds from Black Liquor of Eucalyptus urophylla Kraft Pulping

作　　者：罗小林[1] 詹怀宇[1] 付时雨[1] 詹瑶[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510641

出　　处：《林产化学与工业》2009年第4期53-58,共6页Chemistry and Industry of Forest Products

基　　金：国家973计划资助(2007CB210201)

摘　　要：用单一pH值萃取法、有机溶剂-无机溶剂交替萃取法和不同pH值分级萃取法从尾叶桉KP法制浆黑液中分离得到18种小分子酚类化合物。采用不同pH值分级萃取法,即分别在pH值为12、7和2时分级萃取,可获得相对量为2 379.7 mg/L的小分子酚类化合物。此方法避免了单一pH值萃取法所造成的较为严重的共沉现象,也减少了有机溶剂-无机溶剂交替萃取法复杂的分离手段所产生的小分子酚类化合物的损失。此外,对于可作为漆酶天然介体的紫丁香醛和乙酰丁香酮以及可用于合成高分子材料、生物杀虫剂和除草剂的愈创木酚和紫丁香酚,单一pH值萃取法的共沉率分别达38.65%、43.31%和12.25%、14.81%,而不同pH值分级萃取法几乎没有发生共沉。Three methods, namely extraction at constant pH value, alternative extraction using organic and inorganic solvents, and sequential extraction at different pH value, were adopted to separate 18 low-molecular-weight phenolic compounds from Eucalyptus urophylla kraft pulping black liquor. Using the method of sequential extraction at different pH value, i.e. sequentiM extraction at pH value 12, 7 and 2, total relative yield of low-molecular-weight phenolic compounds is 2 379.7 mg/L. The method not only avoids serious co-precipitation caused by the method of extraction at constant pH value, but also reduces loss of low-molecular-weight phenolic compounds caused by eomplieated procedures of the method of ahernative extraction using organic and inorganic solvents. Moreover, co-precipitation rates of syringaldehyde, with acetosyringone （which can be used as natural mediators of laccase） , and guaiacol with syringol （which can be used to synthesize polymers, phenoxyherbicides and biocides） are 38.65 % , 43.31% and 12.25 % , 14.81% for the method of extraction at constant pH value, but there is almost no co-precipitation for the method of sequential extraction at different pH values.

关 键 词：尾叶桉 KP法制浆 黑液 小分子酚类化合物 

分 类 号：TQ351.0[化学工程]