Abstract The contribution of the amorphous phase in aluminum hydroxide and alumina to their properties was investigated in this work. It was shown that the amorphous phase in aluminum hydroxide is stabilized by alumoxanes, and it is a source of a finely porous component and capable of increasing the surface area by ~78%. In γ-Al2O3, amorphous alumina raises the surface area and the acidity. It was established that the method of chemical modification does not change the phase inhomogeneity but allows adjusting the acid properties while maintaining the high specific surface area. It was shown that the amorphous phase is more reactive when processing phase-inhomogeneous aluminum hydroxide with acetic acid. Crystallization of amorphous alumina as a result of high-temperature treatment of phase-inhomogeneous aluminum hydroxide is accompanied by significant decrease in specific surface area and acidity.

中文翻译：

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钯催化剂的相不均匀氧化铝载体的改性。第 I 部分：无定形相对氧化铝质构和酸性特性的影响以及控制其相均匀性的方法

摘要 本文研究了氢氧化铝和氧化铝中的非晶相对其性能的贡献。结果表明，氢氧化铝中的无定形相被铝氧烷稳定，它是细孔组分的来源，能够将表面积增加约 78%。在γ-Al2O3 中，无定形氧化铝提高了表面积和酸度。已确定化学改性方法不会改变相的不均匀性，但允许在保持高比表面积的同时调整酸性质。结果表明，当用乙酸处理非均相氢氧化铝时，无定形相更具反应性。