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New Production Route of Magnesium Hydroxide and Related Environmental Impact

Author

Listed:
  • Andrzej Jarosinski

    (Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A Str., 31-261 Cracow, Poland)

  • Piotr Radomski

    (Institute of Chemistry and Inorganic Technology, Cracow University of Technology, 31-155 Cracow, Poland)

  • Lukasz Lelek

    (Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A Str., 31-261 Cracow, Poland)

  • Joanna Kulczycka

    (Faculty of Management, AGH University of Science and Technology, 30-067 Cracow, Poland)

Abstract

The paper presents research on a method of obtaining magnesium hydroxide from magnesium sulphate salts and NaOH. In order to acquire the desired and controlled properties, the method of precipitating in aqueous solutions by introducing a NaOH solution into a solution of MgSO 4 has been applied. To get as stable a product as possible with graining, the introduction of NaOH takes place at a constant flow rate. In order to identify the environmental impact of the developed process, a life cycle assessment (LCA) has been made. The use of the proposed method for the synthesis of Mg(OH) 2 incorporating washing with 25% ammonia solution and acetone enabled a product with a high specific surface area. The Mg(OH) 2 obtained was characterised by a higher specific surface area than commercially available magnesium hydroxides that are used as additives for flame retardants in polymeric materials. This allows the material to be used as an anti-pyrogen for a wider group of polymeric materials. For the LCA analysis, two scenarios were assumed, from which the basic one included recovery of ammonia and acetone. The environmental analysis carried out confirmed the validity of this assumption, as it was stated that the main part of the impact was connected with the supply chain for the process examined.

Suggested Citation

  • Andrzej Jarosinski & Piotr Radomski & Lukasz Lelek & Joanna Kulczycka, 2020. "New Production Route of Magnesium Hydroxide and Related Environmental Impact," Sustainability, MDPI, vol. 12(21), pages 1-14, October.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:21:p:8822-:d:433878
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