Solubility Characteristics and Crystallization Behavior of Oxalic Acid in the Presence of Sulfuric Acid

Naoko Imura*, Izumi Hirasawa

*この研究の対応する著者

研究成果: Article査読

抄録

Acidic wastewater from industrial discharge is generally treated by neutralization. Before neutralization or water treatment, selective recovery of valuable compounds is necessary to reduce the environmental impact of this acid waste. As a contribution to the development of a novel acidic wastewater treatment, oxalic acid is set as target material which is found in acid waste from the metalworking industry. Crystallization of oxalic acid in the presence of sulfuric acid has rarely been reported. Since this acid waste also contains aluminum ions, the effect of sulfuric acid and aluminum ions on oxalic acid solubility and crystallization was clarified. As a result, sulfuric acid concentration affected the oxalic acid solubility, but aluminum ions had no influence. Oxalic acid was precipitated in columnar shape by cooling crystallization from sulfuric acid aqueous solution with aluminum ions.

本文言語English
ページ(範囲)1042-1046
ページ数5
ジャーナルChemical Engineering and Technology
38
6
DOI
出版ステータスPublished - 2015 6月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学

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