Preparation and evaluation of lignosulfonates as a dispersant for gypsum paste from acid hydrolysis lignin

被引：147

作者：

Matsushita, Y ^{[1
]}

Yasuda, S ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Bioagr Sci, Dept Biosphere Resources Sci, Div Biol Mat Sci,Chikusa Ku, Nagoya, Aichi 4648601, Japan

来源：

BIORESOURCE TECHNOLOGY | 2005年 / 96卷 / 04期

关键词：

lignosulfonate; saccharification; acid hydrolysis lignin; sulfuric acid lignin; gypsum; dispersibility;

D O I：

10.1016/j.biortech.2004.05.023

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In order to effectively utilize a by-product of the acid saccharification process of woody materials, the chemical conversion of guaiacyl sulfuric acid lignin (SAL), one of the acid hydrolysis lignins, into water-soluble sulfonated products with high dispersibitity was investigated. At first, SAL was phenolated (P-SAL) to enhance the solubility and reactivity. Lignosuffortates were prepared from P-SAL by three methods of hydroxymethylation followed by neutral sulfonation (two-step method), sulfomethylation (one-step method) and arylsulfonation. Surprisingly, all prepared lignosulfonates possessed 30 to 70% higher dispersibility for gypsum paste than the commercial lignosulfonate. Evaluation of the preparations for gypsum paste suggested that the higher molecular weights and sulfur contents of the preparations increased their dispersibility. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：465 / 470

页数：6

共 20 条

[1] Research and development on the utilization of alcohol fuels at the National Renewable Energy Laboratory [J].