燃料化学学报2011，Vol.39Issue(8)：621-626,6.
Ni-Sn-Cr/AC催化剂上乙酸甲酯气相羰基化合成醋酐反应的研究
Vapor phase carbonylation of methyl acetate to acetic anhydride over Ni-Sn-Cr/AC catalyst
摘要
Abstract
Ni-Sn-Cr/AC catalyst was prepared through impregnation with Ni(NO3)2·6H2O, SnCl4·5H2O and Cr(NO3)3·9H2O as precursors and activated carbon as support; it was used in vapor phase carbonylation of methyl acetate to proroduce acetic anhydride in a continuous flow type fixed-bed reactor. The effects of each metal loading on the catalytic activity as well as the influence of reaction temperature, pressure, and time on the reaction behavior were investigated. The results showed that the Ni9%-Snl2%-Cr6%/AC catalyst calcined at 600 ℃ for 4 h exhibits excellent performance in the carbonylation; over it under the optimized reaction conditions of 5.5 Mpa and 205 ℃, the conversion of methyl acetate and the selectivity to acetic anhydride reach 38. 8% and 81. 1% , respectively. The fresh catalyst and spent catalysts after reaction for different times on stream were characterized by means of X-ray diffraction and element analysis; the results suggested that Ni° is main active sites. During the test, the activity of the catalyst is decreased dramatically with the time on stream, which could be ascribed to the loss of active component Ni, carbonaceous deposition and destruction of activated carbon framework.关键词
乙酸甲酯/气相羰基化/醋酐/镍Key words
methyl acetate/vapor phase carbonylation/acetic anhydride/nickel分类
化学化工引用本文复制引用
贾庆龙,谭猗生,韩怡卓..Ni-Sn-Cr/AC催化剂上乙酸甲酯气相羰基化合成醋酐反应的研究[J].燃料化学学报,2011,39(8):621-626,6.基金项目
科技部国际合作项目(2007DFC60110). （2007DFC60110）
