微量加碱法制备聚合氯化铝

Synthesis of polyaluminium chloride with microinjection of base method

采用微量加碱法制备聚合氯化铝絮凝剂,使用Al-Ferron逐时络合比色法对制得的样品进行表征。探讨了制备方法、碱化度、制备温度、AlCl3和NaOH浓度对制备产品的影响。结果表明:当碱化度为2.5,反应温度为70℃左右,参与反应的AlCl3和NaOH溶液浓度均为2 mol/L时,可获得Al13的质量分数为85%左右的产品。

The polyaluminium chloride was prepared by microinjection of base method, and the prepared sample was characterized by Al-Ferron complex timed colorimetric method, the effects of preparation method, alkalization degree, reaction temperature, concentration of AlCl3 and NaOH on the product were discussed. The results showed that： when the alkalization degree was 2.5, the reaction temperature was about 70℃, the concentration of AlCl3 and NaOH were both 2 mol/L, the product with Al13 mass fraction about 85% could be obtained.