Preparation of high concentration polyaluminum chloride by chemical synthesis-membrane distillation method with self-made hollow fiber membrane.
Preparation of high concentration polyaluminum chloride by chemical synthesis-membrane distillation method with self-made hollow fiber membrane.
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DOI：
10.1016/s1001-0742(11)60838-3
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发表时间：
2012-05
影响因子：
6.9
通讯作者：
Changwei Zhao;Yong Yan;D. Hou;Z. Luan;Zhiping Jia
中科院分区：
文献类型：
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作者：
Changwei Zhao;Yong Yan;D. Hou;Z. Luan;Zhiping Jia
采用自制的中空聚偏氟乙烯膜，采用直接接触膜蒸馏(DCMD)的方法，在化学合成的基础上制备了高白含量的高浓度聚合氯化铝(PACl)。考察了渗透通量和Al的形态分布。实验结果表明，在DCMD工艺结束时，膜的渗透通量从14 kg/(m2·hr)降至6 kg/(m2·hr)，这主要是由于膜表面形成了氯化钠沉积。当DCMD实验结束时，Alb含量略有下降，仅从86.3%降至84.4%，相应地，Alc含量从7.2%略升至8.5%，并在整个DCMD过程中保持在7%。采用化学合成-DCMD法制备了总铝浓度为2.2mol/L、AlB含量为84%的PACl。
A method of direct contact membrane distillation (DCMD) with a self-made hollow polyvinylidene fluoride membrane was applied to prepare high concentration polyaluminum chloride (PACl) with high Albcontent based on chemical synthesis. The permeate flux and Al species distribution were investigated. The experimental results showed that the permeate flux decreased from 14 to 6 kg/(m2·hr) at the end of the DCMD process, which can be mainly attributed to the formation of NaCl deposits on the membrane surface. The Alb content decreased slightly, only from 86.3% to 84.4%, when the DCMD experiment finished, correspondingly the Alccontent increased slightly from 7.2% to 8.5%, and the Alacontent remained at 7% during the whole DCMD process. A PACl with Albcontent of 84% at total aluminum concentration 2.2 mol/L was successfully prepared by the chemical synthesis-DCMD method.