A Trend to the Production of Calcium Hydroxide and Precipitated Calcium Carbonate with Defined Properties

✍ Scribed by Hilja Lõhmus; Ahto Räni; Urve Kallavus; Rein Reiska

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 541 KB
• Volume: 80
• Category: Article
• ISSN: 0008-4034
• DOI: 10.1002/cjce.5450800514

✦ Synopsis

Abstract

In this paper, production of precipitated calcium carbonate (PCC) with required particle size and morphological structure, along with its dependence on technological parameters and the properties of Ca(OH)~2~, is discussed. The effect of the reaction environment on the kinetics of CaO hydration and the formation of crystals in water suspension was established. A remarkable difference in the system's restoration ability after stirring was observed. The hydration process is initially controlled by a kinetic mechanism, followed by a diffusion‐controlled process. The dissolution speed of lime hydrated to suspension is eight times higher than that of lime hydrated to powder. Particles of hydrated lime appeared in various forms.