摘要
采用常压固定床反应器,对6-叔丁基-3-甲基苯酚(6B3MP)脱叔丁基制间甲酚(MC)的反应进行了研究。考察了ZSM-5沸石、γ-Al2O3和浓硫酸改性γ-Al2O3等固体酸催化剂对该反应的催化性能,筛选出适宜的催化剂,并采用向反应体系中加入乙醇、环己烷和苯等溶剂的方法提高6B3MP的转化率;并考察了溶剂加入量和反应温度等因素对6B3MP脱烷基化反应的影响。实验结果表明,以γ-Al2O3为催化剂、环己烷为溶剂,在n(环己烷)∶n(6B3MP)=4.7~5.0、反应温度250~270℃、液态空速2.4~6.0 h-1的条件下,6B3MP的转化率可达到99.79%,MC的选择性为100.00%。
Dealkylation of 6-tert-butyl-3-methy-phenol(6B3MP) to m-cresol(MC) was studied in a fixed bed reactor under atmospheric pressure. The effects of catalysts, namely zeolite ZSM-5, γ-Al2O3 and concentrated sulfuric acid modified γ-Al2O3, solvents, namely ethanol, cyclohexane and benzene, and reaction temperature on the dealkylation were investigated. The results showed that under the conditions of γ-Al2O3 as the catalyst, cyclohexane as the solvent, mole ratio of cyclohexane to 6B3MP 4.7 - 5.0, reaction temperature 250 - 270 ℃ and LHSV 2.4 - 6.0 h-1, the conversion of 6B3MP and the selectivity to MC reached 99.79% and 100.00%, respectively.
出处
《石油化工》
CAS
CSCD
北大核心
2012年第1期62-65,共4页
Petrochemical Technology
基金
陕西省教育厅产业化自助项目(2005
05JC26)