微波辐照下麦草碱木质素三甲基季铵盐的合成  

Synthesis of a trimethy quaternary ammonium salt of wheat-alkali-lignin under microwave irradiation.

作　　者：任世学[1,2] 方桂珍[1] 王鹏[2] 姜贵全[3] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室 [2]哈尔滨工业大学市政环境工程学院 [3]北华大学林学院

出　　处：《北京林业大学学报》2012年第2期141-145,共5页Journal of Beijing Forestry University

基　　金：国家自然科学基金项目(30901135);中国博士后基金项目(20060400828);吉林省科技厅项目(20080705)

摘　　要：为研究微波辐照下碱木质素的反应活性,以造纸黑液中提取的麦草碱木质素为原料,在微波辐照下合成麦草碱木质素三甲基季铵盐,并研究了反应温度、反应时间及催化剂等因素对合成的影响。初步确定合成条件为:温度75℃,反应时间25min,不加催化剂(微波可替代催化剂)。并用酸性黑ATT染料溶液对麦草碱木质素三甲基季铵盐的絮凝性能进行了研究。结果表明:当麦草碱木质素三甲基季铵盐投加量为600mg/L、pH值在1～2.5之间时,其对0.15g/L酸性黑ATT的脱色率超过90%。Alkali lignin has low reaction activity because of its chemical structure, but its reactivity can be improved under microwave irradiation. The trimethyl quaternary ammonium salt was synthesized under microwave irradiation with wheat-alkali-lignin as raw material, which was extracted from black liquor from the kraft process. Effects of reaction temperature, reaction time and catalyst on the synthesis were investigated. The optimal synthesis conditions were determined： reaction temperature 75℃, reaction time 25 min, and catalyst was not necessary because the microwave irradiation played a similar role as a catalyst. The flocculation of trimethy quaternary ammonium salt prepared from wheat-alkali-lignin was examined by acid black ATT dye in an aqueous solution, and the results showed that over 90% acid black ATT dye solution could be flocculated when the trimethyl quaternary ammonium salt at a concentration of 600 mg/L with pH values of 1-2.5 was added into the acid black ATT dye with a concentration of 0.15 g/L.

关 键 词：微波 麦草碱木质素三甲基季铵盐 反应活性 

分 类 号：X793[环境科学与工程—环境工程]