• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >The formation mechanism of Al_(13) and its purification with an ethanol-acetone fractional precipitation method
【24h】

The formation mechanism of Al_(13) and its purification with an ethanol-acetone fractional precipitation method

机译：Al_（13）的形成机理及其乙醇-丙酮分级沉淀法纯化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The formation mechanism of Al_(13) is discussed via the investigation of the distribution and transformation of Al_(13) in the precipitate and in the solution during the preparation of polyaluminum chloride (PACl). After the NaOH is injected into the AlCl3 solution, the monomeric Al_a species reacts with OH~- immediately to form the high-molecular-weight Al_c species, which may exist either in the solution or in the precipitate, depending on the system temperature and the rate of base injection. Subsequently, the Al_c species reacts with Al_a to generate the medium-molecular-weight Al_b species, i.e., Al_(13). The Al_(13) species can be separated and purified from PAC1 solutions with an ethanol-acetone fractional precipitation method. The results from ferron assay and liquid- and solid-state ~(27)Al NMR show that the purity and the extraction yield of the extracted Al_(13) depend on the initial Al_(13) concentration. A higher Al_(13) content in the initial PAC1 solution leads to higher Al_(13) purity and to a higher extraction yield. A maximum purity of 99.5% for Al_(13) can be achieved by the described ethanol-acetone precipitation method.
机译：通过研究制备聚氯化铝（PACl）期间沉淀物中和溶液中Al_（13）的分布和转变，探讨了Al_（13）的形成机理。将NaOH注入AlCl3溶液后，单体Al_a物种立即与OH〜-反应形成高分子量Al_c物种，取决于系统温度和温度，它们可能存在于溶液或沉淀物中。基础注射速率。随后，Al_c物质与Al_a反应以产生中等分子量的Al_b物质，即Al_（13）。可以使用乙醇-丙酮分级沉淀法从PAC1溶液中分离和纯化Al_（13）物种。铁氧体分析和液相和固态〜（27）Al NMR的结果表明，提取的Al_（13）的纯度和提取率取决于初始Al_（13）浓度。初始PAC1溶液中较高的Al_（13）含量会导致较高的Al_（13）纯度和较高的提取率。通过所述的乙醇-丙酮沉淀方法可以达到Al_（13）的最大纯度为99.5％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号