第 33 卷第 3 期 | | Vol. 33 No. 3 | 2003 年 6 月 | Jun 2003 |
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所属栏目:其它
低压氧法合成乙醛酸的改进 |
张友恭; 张昭; 樊国栋; 杨林(陕西科技大学化工系; 陕西咸阳; 712081) |
摘 要:用少量复合催化剂SA ,使用低压氧氧化乙二醛 ,合成乙醛酸 ,乙二醛转化率≥98% ,乙醛酸收率≥ 93%。电位滴定监控反应。研究了 pH及乙二醛对合成的影响 ,得到优惠工艺条件 :介质pH <1,反应液中乙二醛含量 (起始 )≥ 16 % ,催化剂SA适量 ,氧等气体总压0 12MPa ,反应温度 4 0~ 6 0℃ ,时间 2~ 3h。 |
关键词:乙醛酸; 乙二醛; 氧气; 氧化 |
中图分类号:O623.671 文献标识码:A 文章编号:1009-9212(2003)03-0056-02 |
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The improve of Synthesis for Glyoxylic Acid by Oxugen |
ZHANG You gong etc.(Department of Chemical Engineering; Shanxi science and technology University; Shanxi Xianyan 712081; China) |
Abstract:Glyoxylic acid was satisfyingly synthesiaed by controlling oxidation of glyoxal with oxygen and using substituti on of multifunctional material as catalyst. Percentage conversion of glyoxal is ≥98%,yield of glyoxylic acid 93%. The method using new catalyst avoids producing salts. The optimun condition of synthesis follow:pH of medium <1, w(OHCCHO)≥16%,total pressure of oxygen and other gas 0 12MPa,reaction temperature 40~60?℃ and reacting time 2~3h. |
Key words:glyoxulic acid; glyoxal; oxugen; oxidation |
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收稿日期:2002-10-18
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