石油化工2011，Vol.40Issue(1)：69-74,6.
二氧化硅负载磷钨酸催化合成蒽醌
Synthesis of Anthraquinone over HPW/SiO2 Catalyst
摘要
Abstract
A series of the supported phosphotungstic acid(HPW) catalysts were prepared through an isochoric impregnation method and were used in synthesis of anthraquinone (AQ) through dehydration of o-benzoylbenzoic acid( BBA), with SiO2, activated carbon, bentonite or γ-A12O3 as supports. The supported catalyst HPW/SiO2 was characterized by means of TG-DTG, XRD and FTIR. Effects of the support type, calcination temperature and HPW loading on the catalyst activity were investigated and the catalytic performance of HPW/SiO2 catalyst in the anthraquinone synthesis was evaluated. The results indicated that under the optimal conditions for the catalyst preparation: SiO2 as support,calcination temperature 250 ℃, calcination time 3 h and HPW loading 30％ ( mass fraction), and the optimal conditions for the synthesis: m (catalyst): m (BBA) 1.60, reaction temperature 220 ℃ and reaction time 2 h, the AQ yield could reach 99.6％. But the HPW/SiO2 catalyst stability in the AQ synthesis was not good. It was found by means of BET, UV-Vis and Py-IR that the catalyst deactivation was due to decrease of the Br(o)nsted acid sites, which was caused by coking on the catalyst surface.关键词
邻苯甲酰苯甲酸/脱水/蒽醌/磷钨酸催化剂/二氧化硅Key words
o-benzoylbenzoic acid/ dehydration/ anthraquinone/ phosphotungstic acid catalyst/silicon dioxide分类
化学化工引用本文复制引用
王桂荣,栾艳勤,郝苏霞,赵新强,王延吉..二氧化硅负载磷钨酸催化合成蒽醌[J].石油化工,2011,40(1):69-74,6.基金项目
河北省自然科学基金资助项目(B2007000016) （B2007000016）
河北省教育厅博士基金资助项目(B2003104). （B2003104）
