ZENG Mei;DAI Aijun;ZHAO Meng;DU Yanxue;GE Qiming;

• 1:Xi'an Origin Chemical Technologies Co.
• 2:Ltd.
• 3:Northwest Research Institute of Chemical Industry

Abstract：

To improve the stability and dispersion of lignin additive,the separation,purification,distribution and chemical modification methods were used to modify lignin. Discussed the advantages and disadvantages of the methods,mainly analyzed four chemical modification methods which were oxidation,sulfonation,condensation,graft copolymerization. Finally,the trends of development of lignin modified coal water mixture additives were prospected. The results show that separation-purification technology,compound technology which have no effects on the surface adsorption of coal,can not change the structure and surface properties of lignin. The above two methods also lack market competitiveness because of high cost. The chemical modification method by introducing favorable functional groups or removing unfavorable functional groups in the lignin molecules,changes the molecular structure,improves disperstiveness,and modified product prepares coal water mixture with excellent performance. The reaction characteristics of lignin should be adjusted based on the coal properties.A series of additives can be compounded by controlling the reaction process. So the usable range of lignin can be expanded.

Key Words： lignin;coal water mixture;additive,separation-purification;compound technology;chemical modification

Abstract:

Keywords:

Foundation: 陕西省科技统筹创新工程计划资助项目(2012KTCG04-14)

Authors: ZENG Mei;DAI Aijun;ZHAO Meng;DU Yanxue;GE Qiming;

DOI: 10.13226/j.issn.1006-6772.2014.05.012

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