摘要
以玉米芯为原料,大孔强酸型离子交换树脂为催化剂,在γ-戊内酯和水的混合溶剂中反应制备糠醛,考察了反应温度、反应时间、溶剂及催化剂用量对糠醛产率的影响,采用中心复合设计(CCD)和响应面法对反应条件进行了优化。结果表明,最优条件为0.5 g玉米芯,催化剂负载量0.55 g,温度153℃,反应时间66 min。随着反应的进行,催化剂逐渐失活,但经硫酸简单处理后,催化剂恢复了活性。酸性位点的浸出和酸密度降低是失活的主要原因。
Furfural was prepared in the mixed solution ofγ-valerolactone and water by using corncob as raw material and macroporous strong acid ion exchange resin as catalyst.The effects of reaction temperature,reaction time,solvent and catalyst amount on the yield of furfural were investigated.The central composite design(CCD)and response surface methodology(RSM)were used to optimize the catalytic reaction conditions of corncob.The results show that the optimal conditions are corncob 0.5 g,catalyst load 0.55 g,temperature 153℃,reaction time 66 min.In addition,deactivation of catalyst was also explored as the main reason.With the progress of the reaction,the catalyst showed a gradual deactivation behavior,but the catalyst recovered its activity after simple treatment with sulfuric acid.Acid titration analysis confirmed that leaching of acid sites and decrease of acid density were the main causes of inactivation.
作者
曹晓梅
王伟涛
郭海顺
马养民
杨秀芳
郭念文
CAO Xiao-mei;WANG Wei-tao;GUO Hai-shun;MA Yang-min;YANG Xiu-fang;GUO Nian-wen(College of Chemistry & Chemical Engineering,Key Laboratory of Chemical Additives forChina National Light Industry,Shaanxi University of Science & Technology,Xi’an 710021,China;Hanzhong City Pengyuan Biotechnology Co.,Ltd.,Hanzhong 723200,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第5期1314-1318,1323,共6页
Applied Chemical Industry
基金
陕西省教育厅服务地方专项科研计划项目(21JC007)
陕西省科技厅重点研发项目(2022NY-080,2021NY-127)。
关键词
糠醛制备
玉米芯
固体酸
多相反应
furfural preparation
corncob
solid acid
multiphase reaction
