STRUCTURE OF ALUMINUM HYDROXIDE GEL .1. INITIAL PRECIPITATE
STRUCTURE OF ALUMINUM HYDROXIDE GEL .1. INITIAL PRECIPITATE
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DOI：
10.1002/jps.2600650814
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发表时间：
1976-01-01
影响因子：
3.8
通讯作者：
HEM, SL
中科院分区：
文献类型：
--
作者：
NAIL, SL;WHITE, JL;HEM, SL
由氯化铝或硫酸铝与氢氧化铵的反应产生的初始氢氧化铝凝胶沉淀通过电位滴定、化学分析和结合的氢氧化物与铝的比率来显示，以拟合先前描述的聚合物模型。多核羟基铝颗粒的形成被视为涉及去质子化-脱水机制的逐步过程，这导致六元环的形成;这些环可以通过相同的机制进一步聚结。从氯化铝中沉淀的氢氧化铝凝胶可以由式Al（OH）2.55（Cl）0.45表示，并且可能以10个稠合六元环的聚合物形式存在。从硫酸铝中沉淀的氢氧化铝凝胶可由式Al（OH）2.30（SO 4）0.35表示。该物种可能以三个稠合六元环的聚合物形式存在。
The initial aluminum hydroxide gel precipitate resulting from the reaction of aluminum chloride or aluminum sulfate with ammonium hydroxide is shown by potentiometric titration, chemical analysis, and the ratio of bound hydroxide to aluminum to fit a polymer model described previously. The formation of polynuclear hydroxyaluminum particles is treated as a stepwise process involving a deprotonation–dehydration mechanism, which results in the formation of six‐membered rings; these rings may further coalesce by the same mechanism. The aluminum hydroxide gel precipitated from aluminum chloride can be represented by the formula Al(OH)2.55(Cl)0.45and probably exists as a polymer of 10 fused six‐membered rings. The aluminum hydroxide gel precipitated from aluminum sulfate can be represented by the formula Al(OH)2.30(SO4)0.35. This species probably exists as a polymer of three fused six‐membered rings.