没食子酸生产废炭渣的处理  

Treatment of Waste Carbon Residue in Gallic Acid Production

作　　者：刘扬林[1] 刘文剑[2] 蒋新元[2] 刘淑云[1] 

机构地区：[1]长沙环境保护职业技术学院环境工程系,湖南长沙410004 [2]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《化工环保》2010年第4期332-335,共4页Environmental Protection of Chemical Industry

基　　金：湖南省环保厅环境科技发展项目(湘财建指2007-185)

摘　　要：采用热水洗涤法回收没食子酸生产废炭渣中的没食子酸,过滤炭渣经热再生处理得到热再生活性炭。研究了热水洗涤法回收没食子酸和热再生法再生活性炭的最佳工艺条件。实验结果表明,热水洗涤法回收没食子酸的优化工艺条件:废炭渣质量与热水体积比为0.15g/mL,热水洗涤时间为60min,热水洗涤温度为60℃。在此最佳工艺条件下,没食子酸回收量达52mg/g。热再生法再生活性炭的最佳工艺条件为:热再生温度500℃,热再生时间120min。在此条件下制备的热再生活性炭对亚甲基蓝的吸附量达168mg/g,热再生活性炭平均得率为57.1%。Gallic acid in the waste carbon residue in gallic acid production was recovered by hot water washing process,and the carbon residue after filtration was regenerated by thermal process.The optimum process conditions for hot water washing process are as follows: ratio of waste carbon residue mass to hot water volume 0.15 g/mL,hot water washing time 60 min,hot water washing temperature 60 ℃.Under these conditions,the rewvery of gallic acid is 52 mg/g.The optimum process conditions for thermal regeneration are as follows: regeneration temperature 500 ℃,regeneration time 120 min.Under these conditions,the adsorption capacity of the thermal-regenerated activated carbon for methylene blue is up to 168 mg/g,and the average yield of the thermal-regenerated activated carbon is 57.1%.

关 键 词：废炭渣 没食子酸 活性炭 热水洗涤 热再生 

分 类 号：X783[环境科学与工程—环境工程]