第 38 卷第 3 期 |  | Vol. 38 No. 3 | 2008 年 6 月 | Jun 2008 |
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所屬欄目:有機合成原料
葡萄糖氧化制草酸 |
李鳳飛
(株洲選礦藥劑廠(chǎng),湖南 株洲 412005) |
摘 要:針對目前國內草酸生產(chǎn)成本高、工藝復雜等缺點(diǎn),開(kāi)展了葡萄糖氧化制草酸的工藝研究。以蔗糖、葡萄糖等碳水化合物為原料,在硫酸、硝酸和水的混合物為氧化介質(zhì)的反應體系中氧化為草酸。在優(yōu)化工藝條件下:硫酸的濃度為50%,反應溫度60~65℃,m(葡萄糖) ∶ m(硝酸)=1 ∶ 3.2,催化劑的加入量為0.05%(以葡萄糖計,m/m),加料時(shí)間6 h,母液循環(huán)使用。每噸葡萄糖可產(chǎn)草酸1.65~1.75 t,收率達90%以上。 |
關(guān)鍵詞:氧化;葡萄糖;草酸 |
中圖分類(lèi)號:TQ225.14+2 文獻標識碼:B 文章編號:1009-9212(2008)03- 0054-03 |
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Preparation of Oxalic Acid through Glucose Oxidation |
LI Feng-fei
(Zhuzhou Flotation Reagents Factory,Zhuzhou 412005,China) |
Abstract:To solve the problems such as high production cost and complicated process of oxalic acid,preparation of oxalic acid via glucose oxidation was investigated. Oxalic acid was prepared via oxidation from the carbohydrates such as cane sugarand glucose in reaction mixing medium of sulfuric acid,nitric acid and water. The best process conditions were obtained as follow:sulfuric acid concentration 50%,reaction temperature 60~65℃,m(glucose) : m(nitric acid)=1 : 3.2,amount of catalyst 0.05%(glucose,m/m),charge time 6 h and cycling use of mother liquid. 1.65~1.75 ton of oxalic acid can be produced per ton of glucose with more than 90% of yield. |
Key words:oxidation;glucose;oxalic acid |
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作者簡(jiǎn)介:李鳳飛(1968-),女,湖南邵陽(yáng)人,工程師,從事化工產(chǎn)品研發(fā)和設計工作。(E-mail:lff950216@126.com)
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收稿日期:2008-01-04
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