氢氧化铝相平衡关系的热化学计算

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2023-01-01 DOI:10.36807/1998-9849-2023-65-91-3-8

Ivan I. Torlopov, N. Pakhomov

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引用次数: 0

摘要

为了进一步研究氢氧化铝的平衡关系，对从酸性盐溶液中析出氢氧化铝过程中形成的相的热力学数据进行了检索和分析。通过对低温量热法得到的各种氢氧化铝改性物热力学性质的文献研究，发现薄水铝石的量热数据存在矛盾，其原因是晶体薄水铝石与凝胶薄水铝石(薄水铝石与拟薄水铝石)相的热化学性质存在差异。绘制了氢氧化铝相的饱和指数，从而可以比较这些相的稳定性，并确定了表征沉淀条件的某些规律

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THERMOCHEMICAL CALCULATIONS OF EQUIULIBRIUM RELATIONS OF ALUMINIUM HYDROXIDE PHASES

A search and analysis of thermodynamic data on the phases formed during the precipitation of aluminium hydroxide from acidic salts’ solutions was carried out in order to further study the equilibrium relations of aluminium hydroxide. The study of literature on the thermodynamic properties of various aluminium hydroxides modifications obtained by low-temperature calorimetry revealed a contradiction in the calorimetric data on boehmite, which is explained by the difference in thermochemical properties between the phases of crystalline and gelatinous boehmite (boehmite and pseudoboehmite). Saturation indices of aluminium hydroxide phases were plotted, which, in turn, made it possible to compare these phases in terms of their stability and confirm certain regularities characterizing the precipitation conditions

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Bulletin of the Saint Petersburg State Institute of Technology (Technical University)

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