Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

High Purity Magnesium Hydroxide Preparation from Tachyhydrite

Document Type : Research Note

Authors
Majzob Hosseini Seyed Alborz 1
Fereydoun Moattar Tehrani 2
Mina Eshtad 3
1 Abadgaran Construction Chemicals Co., Tehran, I.R. IRAN
2 Chemistry Department, Sharif University of Technology, Tehran, I.R. IRAN
3 Abadgaran Chemical Technology Developement Research Group, Tehran, I.R. IRAN
Abstract
In this research, sedimentation of magnesium hydroxide with high purity by Tachyhydrite was tested. For this aim Tachyhydrite solution and calcium hydroxide solution were mixed. This reaction involves the evolution of pH. At the end of experiment the slurry was filtered and washed with water and dried at 100°C. In order to increase filtration rate of Mg(OH)2 an agglomeration system by an anionic polyelectrolyte was applied. The product was then characterized by a complexometric titration to find the total calcium and magnesium content of sediment. Purity of magnesium hydroxide is important because of its use in preparation of magnesium oxide. Magnesium oxid should be high pure because it is used in production of refractories.
Keywords
Tachyhydrite
Magnesium hydroxide
Calcium Hydroxide
Anionic polyelectrolyte
Flocculation process

Subjects

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