Hydration of medium reactive magnesium oxide using hydration agents
No Thumbnail Available
Authors
Van Der Merwe E.M.
Strydom C.A.
Issue Date
2006
Type
Article
Language
en
Keywords
Acetic acid; Hydration; Hydrochloric acid; Magnesium acetate; Magnesium chloride; Magnesium oxide; pH; Temperature Acetic acid; Hydration; Mixtures; pH effects; Positive ions; Hydrating agents; Hydrating solution; Hydration reaction; Magnesia
Alternative Title
Abstract
Water, magnesium acetate, magnesium chloride, acetic acid and hydrochloric acid were used as hydrating agents for an industrially obtained MgO sample. The influence of these different hydrating agents on the pH of the hydrating solution, degree of hydration to Mg(OH)2, and product surface area was studied as a function of the temperature of hydration. When compared to the hydration in water, all hydrating agents improved the degree of hydration between 5 and 50% at all temperatures. MgCl2 and a mixture of HCl and Mg(CH3COO)2 seemed to be the most effective hydrating agents below 60°C, while at temperatures above 60°C Mg(CH 3COO)2 formed the largest percentage Mg(OH)2. Mg(CH3COO)2 was the hydrating agent that showed the strongest temperature dependence. The mechanism of the hydration reaction seems to be dependent of the availability of Mg2+ ions and the increased formation of Mg(OH)2 as temperature increases. © 2006 Akadémiai Kiadó,.
Description
Citation
Journal of Thermal Analysis and Calorimetry
84
2
84
2
Publisher
License
Journal
Volume
Issue
PubMed ID
DOI
ISSN
13886150