使用基离子液有效回收酸.
Alexandra Cristina Blaga1, Oana Cristina Parvulescu2, Dan Cascaval1
1"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 67 Dimitrie Mangeron Av., 700050 Iasi, Romania.
基于的离子液 (ILs) 通过液-液提取有效地分离酸 (VA). 优化的条件产生了高的提取效率,证明了ILs.
科学领域:
- 绿色化学 绿色化学
- 分离科学 分离科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 炭酸和瓦列里克酸 (VA) 一样是有价值的化学物质,但难以分离.
- 液体-液体提取是一种关键的分离技术,但通常需要高效和选择性的提取剂.
- 离子液体 (ILs) 为先进的分离工艺提供可调节的特性.
研究的目的:
- 为了研究基于的离子液体 (ILs) 进行高效的酸 (VA) 分离.
- 评估过程参数 (pH,IL度,温度) 对提取效率的影响.
- 通过响应表面方法和可取性函数优化提取过程.
主要方法:
- 使用两个基于的ILs (C103和C104) 与乙烯作为稀释剂进行反应性液体-液体提取.
- 在不同的水相pH,IL度和温度中实验确定提取效率.
- 开发响应表面回归模型,用于预测提取效率.
- 使用可取性函数方法优化过程因素.
主要成果:
- 两种C103和C104IL都显示出高的VA提取效率.
- 在最佳条件下实现了98.61% (C103) 和99.24% (C104) 的提取效率.
- 提取效率在特定的pH值 (3.8对于C103,4对于C104),60g/LIL度和25°C时得到了优化.
- 机械分析表明,VA提取通过IL-酸复合体形成,具有1:1和2:1的石化比.
结论:
- 基于的ILs,特别是C103和C104在赫中稀释,对于酸分离非常有效.
- 开发的模型和优化条件为高效的碳酸回收提供了途径.
- 这项研究强调了ILs作为化学分离过程中可持续和高性能提取剂的潜力.
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