Synthesis of reactive MgO from reject brine via the addition of NH4OH

Haoliang Dong; Cise Unluer; En Hua Yang; Abir Al-Tabbaa

doi:10.1016/j.hydromet.2017.01.010

Synthesis of reactive MgO from reject brine via the addition of NH₄OH

Haoliang Dong, Cise Unluer, En Hua Yang^*, Abir Al-Tabbaa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

Reactive magnesia (MgO) with a high purity and reactivity is used in several high-end applications. This study reports the feasibility of synthesizing high reactivity MgO from reject brine with the use of NH₄OH. The molar amount of NH₄OH was optimized at a NH₄OH/Mg^2 + molar ratio of 6 to provide maximum magnesium oxide yield and purity. This led to the synthesis of Mg(OH)₂ with a purity of 93.5%, which was further calcined at 500 °C for 2 h to produce reactive MgO with a SSA of 78.8 m²/g. This study shed light on the significant potential of reject brine in the recovery of Mg^2 + and the synthesis of reactive MgO with a wide range of potential applications.

Original language	English
Pages (from-to)	165-172
Number of pages	8
Journal	Hydrometallurgy
Volume	169
DOIs	https://doi.org/10.1016/j.hydromet.2017.01.010
Publication status	Published - May 1 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

ASJC Scopus Subject Areas

Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Keywords

Mg(OH)
MgO
Microstructure
NHOH
Reject brine
Synthesis

Access to Document

10.1016/j.hydromet.2017.01.010

Cite this

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title = "Synthesis of reactive MgO from reject brine via the addition of NH4OH",

abstract = "Reactive magnesia (MgO) with a high purity and reactivity is used in several high-end applications. This study reports the feasibility of synthesizing high reactivity MgO from reject brine with the use of NH4OH. The molar amount of NH4OH was optimized at a NH4OH/Mg2 + molar ratio of 6 to provide maximum magnesium oxide yield and purity. This led to the synthesis of Mg(OH)2 with a purity of 93.5%, which was further calcined at 500 °C for 2 h to produce reactive MgO with a SSA of 78.8 m2/g. This study shed light on the significant potential of reject brine in the recovery of Mg2 + and the synthesis of reactive MgO with a wide range of potential applications.",

keywords = "Mg(OH), MgO, Microstructure, NHOH, Reject brine, Synthesis",

author = "Haoliang Dong and Cise Unluer and Yang, {En Hua} and Abir Al-Tabbaa",

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doi = "10.1016/j.hydromet.2017.01.010",

language = "English",

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T1 - Synthesis of reactive MgO from reject brine via the addition of NH4OH

AU - Dong, Haoliang

AU - Unluer, Cise

AU - Yang, En Hua

AU - Al-Tabbaa, Abir

PY - 2017/5/1

Y1 - 2017/5/1

N2 - Reactive magnesia (MgO) with a high purity and reactivity is used in several high-end applications. This study reports the feasibility of synthesizing high reactivity MgO from reject brine with the use of NH4OH. The molar amount of NH4OH was optimized at a NH4OH/Mg2 + molar ratio of 6 to provide maximum magnesium oxide yield and purity. This led to the synthesis of Mg(OH)2 with a purity of 93.5%, which was further calcined at 500 °C for 2 h to produce reactive MgO with a SSA of 78.8 m2/g. This study shed light on the significant potential of reject brine in the recovery of Mg2 + and the synthesis of reactive MgO with a wide range of potential applications.

AB - Reactive magnesia (MgO) with a high purity and reactivity is used in several high-end applications. This study reports the feasibility of synthesizing high reactivity MgO from reject brine with the use of NH4OH. The molar amount of NH4OH was optimized at a NH4OH/Mg2 + molar ratio of 6 to provide maximum magnesium oxide yield and purity. This led to the synthesis of Mg(OH)2 with a purity of 93.5%, which was further calcined at 500 °C for 2 h to produce reactive MgO with a SSA of 78.8 m2/g. This study shed light on the significant potential of reject brine in the recovery of Mg2 + and the synthesis of reactive MgO with a wide range of potential applications.

KW - Mg(OH)

KW - MgO

KW - Microstructure

KW - NHOH

KW - Reject brine

KW - Synthesis

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