摘要
一个直接接触膜蒸馏(DCMD ) 过程被使用与高 Alc 内容准备高集中 polyaluminum 氯化物(PACl ) 。在彻底的艾尔集中(中高音) 和艾尔种类分发的变化被调查。结果证明中高音增加了，但是流动与在 DCMD 过程期间操作时间减少了。当白长袍的内容从 34% ～ 18% 减少了时， Alc 内容从 65% ～ 81% 增加了，并且翼内容在这个过程是几乎 1% 。2.1 摩尔瑣潲档浥捩污栠摹潲敧 ? 瑳牯条 ? 数晲牯慭据獥漠 ? 桴 ? 污潬獹? 湩潶癬湩 ? 桴 ? 楤' 湛?慣慰楣祴愠摮琠敨攠敬瑣潲档浥捩污挠 ' 倬椽 e 慴楢楬祴 ? 楗桴愠 ? 湩牣慥敳椠 ? 桴 ? 浡畯瑮漠 ? 鰐?鰐？？
A direct contact membrane distillation（DCMD）process was applied to prepare high concentration polyaluminum chloride（PACl）with high Alc content.The changes in total Al concentration（AlT）and Al species distribution were investigated.The results showed that AlT increased but the flux decreased with operating time during the DCMD process.The Alc content increased from 65%to 81%while the Alb content decreased from 34% to 18%,and the Ala content was almost 1%in the process.2.1 mol·L 1PACl with 81%Alc was successfully prepared by DCMD method.Thus the DCMD is an effective method for preparing high concentration PACl with high Alc content.
基金
Supported by National Natural Science Foundation of China（50708109 21076219）
the National High Technology Research and Development Key Program of China（2007AA06Z339 2009AA062901）
