摘要
在氧气辅助下,硝酸选择性氧化乙二醛制备了乙醛酸。在单因素试验基础上,通过高效液相色谱法,考察了通氧速率、保温反应温度、硝酸用量等因素对乙二醛转化率和乙醛酸收率的影响。研究结果表明:制备乙醛酸的最佳反应条件为通氧速率50 m L/min,保温反应温度60℃,硝酸与乙二醛物质的量比0. 59。在此条件下,乙二醛转化率为99. 00%,乙醛酸收率为84. 00%。与传统的硝酸氧化生产工艺相比,硝酸物质的量降低近10%,乙醛酸收率提高了5%以上。
Glyoxylic acid was prepared by selective oxidation of glyoxal with nitric acid and oxygen.Using single factor experiments,the effects of the oxygen delivery rate,reaction temperature,and nitric acid consumption on the conversion of glyoxal and the yield of glyoxylic acid were investigated by high performance liquid chromatography.The results show that the optimal reaction conditions for the glyoxylic acid are oxygen delivery rate of50mL/min,reaction temperature of60℃,and nitric acid to glyoxal ratio of0.59.Under these conditions,the conversion of glyoxal is99.00%and the yield of glyoxylic acid is84.00%.Compared with the traditional nitric acid oxidation process,the amount of nitric acid is reduced by nearly10%,and the yield of glyoxylic acid is increased by more than5%.
作者
李光要
程正载
王涵鼎
丁玲
Mario Gauthier
LI Guangyao;CHENG Zhengzai;WANG Handing;DING Ling;MARIO Gauthier(School of Chemistry & Chemical Engineering,Wuhan University of Science & Technology,Wuhan 430081,China;Department of Chemistry,University of Waterloo,Waterloo,Ontario,N2L3G1,Canada)
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2019年第2期100-104,111,共6页
Journal of Henan University of Science And Technology:Natural Science
基金
湖北省自然科学基金项目(2017CFB680)
国家级大学生创新创业训练计划基金项目(201510488004)
关键词
乙醛酸
氧气辅助
乙二醛
高效液相色谱
glyoxylate
oxygen-assisted
glyoxal
high performance liquid chromatography
