Title: Preparation of Oxalic Acid by Using Liquid Waste of Gulonic Acid
Abstract: Using the liquid waste of gulonic acid as raw material,nitric acid as oxidant,vanadium pentoxide and ferric salt as Composite catalyst,and sulfuric acid as a catalyst,the oxalic acid was synthesized.Effect of reaction temperature,reaction time,the amount of sulfuric acid and nitric acid,catalyst ratio was investigated.By orthogonal test,the best reaction conditions were determined:reaction temperature was 55 ℃;reaction time was 7 h;the amount of nitric acid was 16.2 mL,the amount of sulfuric acid was 6.0 mL and catalyst ratio of vanadium pentaoxide to ferric salt was 1∶20.The average yield of oxalic acid was 84.09 % and the purity was 99.50 %.The quality reached levels of the first grade product specified in the National Standard.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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