Pilot Experimental Statistics for Preparation of p-Cymene from Industrial Dipentene by Catalytic Dehydrogenation
A 20 t/a scale pilot experimental device for continuous gas-phase catalytic dehydrogenation of dipentene was designed and tested. The catalytic dehydrogenation could be continuously carried out at the conditions of temperature 280-300℃, nitrogen flow rate 2.0 L/min, industrial dipentene flow rate 4.0 L/h. The average mass ratio of crude product (kg/kg) to industrial dipentene was 0.90. The crude product of dehydrogenation was easily purified by the glass vacuum rectification apparatus. The mass ratios of industrial dipentene to p-cymene product (kg/kg) were 1.81 (over 99.0 ％), 1.69 (over 98.0 ％), 1.54 (over 96.0 ％) and 1.45 (over 90.0 ％), respectively. The boiling point, relative density and refractive index of p-cymene product with 99.5 ％ purity were 177.1℃, 0.857 g/mL and 1.490, respectively. The pilot experimental statistics could provide services for engineering or industrialization development of p-cymene manufacture from industrial dipentene.
dipentene catalytic dehydrogenation p-cymene pilot experimental statistics
Liang-wu BI Qiu-ge ZHANG Zhen-dong ZHAO Da-wei LI LI Dong-mei GU Yan CHEN Yu-xiang CHEN Yu-xiang LIU Xian-zhang
Institute of Chemical Industry of Forest Products, CAF National Engineering Lab. for Biomass Chemical Utilization Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, China
国际会议
南京
英文
382-386
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）