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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Utilization of spent petrochemical sulfuric acid in the production of wet-process phosphoric acid
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Utilization of spent petrochemical sulfuric acid in the production of wet-process phosphoric acid

机译：石化废硫酸在湿法磷酸生产中的利用

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The possibility of the application of spent sulfuric acid from the petrochemical industry in wet-process phosphoric acid technology was investigated. The effect of organic impurities in sulfuric acid from benzol acidic refining on the solubility of calcium sulfate hydrates is discussed. Solubility isotherms and regression equations for CaSO4-H3PO4-H2SO4-H2O (pure and containing impurities) systems are presented. Phase transition temperatures between dihydrate and hemihydrate calcium sulfate were determined. The difference between pure and polluted sulfuric acid systems observed is negligible over the range of typical wet-process phosphoric acid technology parameters. It is concluded that the application of spent sulfuric acid from benzol acidic refining does not have a negative influence on the crystallization process of dihydrate calcium sulfate and therefore can be applied in wet-process phosphoric acid technology. (c) 2005 Society of Chemical Industry.
机译：研究了石化工业废硫酸在湿法磷酸技术中的应用可能性。讨论了苯甲酸酸性精制过程中硫酸中有机杂质对硫酸钙水合物溶解度的影响。给出了CaSO4-H3PO4-H2SO4-H2O（纯净且含杂质）系统的溶解度等温线和回归方程。确定了二水合物和半水合物硫酸钙之间的相变温度。在典型的湿法磷酸技术参数范围内，观察到的纯硫酸系统和受污染的硫酸系统之间的差异可以忽略不计。结论是，苯甲酸酸性精制过程中使用的废硫酸对二水合硫酸钙的结晶过程没有负面影响，因此可用于湿法磷酸技术中。 （c）2005年化学工业协会。

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