利用矾浆制取氢氧化铝

摘要

For increasing the low value-added of alumina slurry in alum, aluminum hydroxide has been synthesized from the alunite mineral. Acid-melting and alkaline lcaching methods were used to synthesis of AI（OH）3 materials, compared with the two different materials, both methods can prepare AI（OH）3. In addition, the bayerite [α-Al（OH）3] obtained by the acid-melting method while the boemhite （γ-AlOOH） obtained by the alkaline leaching method. The structure of the materials were characterized by using modern physical and chemical techniques, such as X-ray diffraction （XRD）, Thermal analyses （TG-DTA） and Scanning electron micrograph （SEM）.%以提高矾浆附加值为目的，拟用矾浆制备纳米氢氧化铝材料。利用酸熔法和碱浸法合成了Al（OH），材料，并针对两种不同制备方法的材料进行了比较，发现酸熔法得到的是拜耳石（d—Al（OH）3），而碱浸法得到的是勃姆石（γ-AlOOH）。并利用X射线衍射（xRD）、热重一差示热重（TG—DTA）和扫描电境分析（SEM）等现代测试手段对材料进行了表征。