Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 84: Issue 2
Hydration of medium reactive magnesium oxide using hydration agents
Authors:
E. van der Merwe Department of Chemistry UNISA South Africa 392 0003 UNISA South Africa 392 0003

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C. Strydom University of Pretoria Department of Chemistry Pretoria South Africa 0002 Pretoria South Africa 0002

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Pages:
467–471
Online Publication Date:
09 May 2006
Publication Date:
01 May 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-7291-6
Keywords:
acetic acid; hydration; hydrochloric acid; magnesium acetate; magnesium chloride; magnesium oxide; pH; temperature
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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 60C, while at temperatures above 60C Mg(CH3COO)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.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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