摘要
中试结果表明 ,在复合催化剂作用下 ,用低压氧气氧化乙二醛水溶液 ,可成功合成乙醛酸。电位滴定跟踪反应过程 ,可满意监控乙二醛反应程度。此反应乙二醛转化率 99% ,乙醛酸收率(以乙二醛为基准 ) 94 %。优化工艺为 :介质 pH <1,釜内氧气、水气等混合气体总压 0 12～ 0 13MPa ,w(乙二醛 ) =15 5 6 % ,反应温度 4 5～ 6 0℃ ,时间 4h。
The results of trial production showed that glyoxylic acid(Ⅰ) was successfully synthesized by controlled oxidation of glyoxal(Ⅱ) with low pressure oxygen under the effect of catalysts.Percentage conversion of Ⅱ was 99%,yield of I was 94%.The optimum reaction conditions were:pH of medium<1,totol pressure of oxygen and other gas in reactor 0 12-0 13 MPa, w (Ⅱ)=15 56%,reaction temperature 45-60 ℃ and reaction time 4 h.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2002年第8期479-481,共3页
Fine Chemicals
