文献类型：期刊文献

英文题名：Catalytic synthesis of propylene glycol to pyruvic acid and methyl pyruvate

作者：Jin, Hongxuan; Bai, Zilong; Zhang, Yi

机构：[1] Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China

年份：2008

卷号：24

期号：2

起止页码：163

外文期刊名：Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology

收录：EI(收录号：20082411313406)

语种：英文

摘要：Pyruvic acid (PA) and methyl pyruvate (MP) were synthesized from propylene glycol by two-step reaction method at normal pressure. In the first step reaction, methyl glyoxal (MG) was prepared by propylene glycol (PG) oxided by O2 over silver catalysts in a fixed bed reactor. In the second step reaction, pyruvic acid and methyl pyruvate were prepared from MG, methanol and O2 by oxidative esterification over self-prepared NbFeAPSO-5 binary catalysts in a fixed bed reactor. Effects of reaction temperature, molar ratio of O2 to reactant (PG or MG) and reactant (PG or MG) liquid-volume hourly space velocity (LHSV) on the two-step reaction were investigated. The optimal reaction conditions were obtained as following: in the oxidation of PG, reaction temperature was 320°C, the molar ratio of O2 to PG was 1.2, and the PG LHSV was 1.0 mL/(g · h). In the oxidative esterification of MG, reaction temperature was 140°C, methanol LHSV was 1.1 mL/(g · h), and the molar ratio of O2 to MG was 2.2. Under the optimal conditions, the conversion of PG was 67.27%, the selectivity of MG was 78.61% and the total yield of PA and MP was 53.52%.