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钒催化剂选择性氧化乳酸乙酯制丙酮酸乙酯
引用本文:李康,葛欣,韩毓旺,沈俭一.钒催化剂选择性氧化乳酸乙酯制丙酮酸乙酯[J].无机化学学报,1999,15(6):826-830.
作者姓名:李康  葛欣  韩毓旺  沈俭一
作者单位:南京大学化学化工学院,南京,210093
摘    要:The structure and surface acidity of vanadium oxide supported on α-Al2O3、TiO2、SiO2 have been studied by XRD、IR、TPR and adsorption microcalorimetry. The catalytic performance of the catalysts for selective oxidation of ethyl lactate to ethyl pyruvate was determined in a continuous flow fix-bed reactor. The results showed that the dispersion of vanadium oxide on the supports weakened the V=O bond and actived the terminal oxygen, which increased the reaction activity. On the otherhand, The surface acidity is harmful to the selectivity of ethyl pyruvate. V/α-Al2O3 exhibited a lower conversion since its dispersion is low. The low selectivity on V/SiO2 is due to its fairly strong surface acidity. Addition of K+ weakened the surface acidty and enhanced selectivity of V/SiO2. V/TiO2 exhibited the best activity and selectivity among the catalysts studied because of its weak surface activity. The conversion of ethyl lactate and selectivity to ethyl pyruvate are 97% and 81%, respectively, over the V/TiO2 catalyst at 473K.

关 键 词:钒催化剂  乳酸乙酯  丙酮酸乙酯  选择性氧化
修稿时间:1999-04-25

SELECTIVE OXIDATION OF ETHYL LACTATE TO ETHYL PYRUVATE OVER SUPPORTED VANADIUM CATALYSTS
LI Kang,GE Xin,HAN Yu-Wang and SHEN Jian-Yi.SELECTIVE OXIDATION OF ETHYL LACTATE TO ETHYL PYRUVATE OVER SUPPORTED VANADIUM CATALYSTS[J].Chinese Journal of Inorganic Chemistry,1999,15(6):826-830.
Authors:LI Kang  GE Xin  HAN Yu-Wang and SHEN Jian-Yi
Institution:Department of Chemistry, Nanjing University, Nanjing 210093,Department of Chemistry, Nanjing University, Nanjing 210093,Department of Chemistry, Nanjing University, Nanjing 210093 and Department of Chemistry, Nanjing University, Nanjing 210093
Abstract:
Keywords:vanadium oxide      ethyl lactate      ethyl pyruvate      selective oxidation
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