Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique

Ruslan Kh Khamizov; Dmitri Muraviev; Nikolai A. Tikhonov; Anna N. Krachak; Tatyana I. Zhiguleva; Olga V. Fokina

doi:10.1021/ie9707735

Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique

Ruslan Kh Khamizov, Dmitri Muraviev, Nikolai A. Tikhonov, Anna N. Krachak, Tatyana I. Zhiguleva, Olga V. Fokina

Department of Chemistry

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Abstract

This paper reports the results obtained by studying the ion-exchange isothermal supersaturation (IXISS) of magnesium carbonate solutions which is observed during elution of Mg2+ from carboxylic resin equilibrated with decalcinated seawater (artificial or natural) with either 2 M NH4HCO3 or with the mixture of 1.5 M Na2CO3 and 0.6 M NaHCO3. Crystallization of supersaturated solution in the first case has been shown to lead to the formation of previously unknown complex ammonium-magnesium carbonate. The results of X-ray, chemical, and differential thermal analyses have allowed the proposal of the following formula for the new magnesium compound: (NH4)2Mg(CO3)2.5H2O. In the second case, crystallization of magnesium carbonate leads to the formation of a pure phase of nesquegonite: MgCO3.3H2O of 99.9% purity. Samples of MgO obtained after annealing ammonium-magnesium precipitates at 773 K contain less than 10-3% of impurities.

Original language	English
Pages (from-to)	2496-2501
Journal	Industrial & Engineering Chemistry Research
Volume	37
Issue number	6
DOIs	https://doi.org/10.1021/ie9707735
Publication status	Published - 1 Jan 1998

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@article{5403c6efcb7243f5a527a69e195ef882,

title = "Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique",

abstract = "This paper reports the results obtained by studying the ion-exchange isothermal supersaturation (IXISS) of magnesium carbonate solutions which is observed during elution of Mg2+ from carboxylic resin equilibrated with decalcinated seawater (artificial or natural) with either 2 M NH4HCO3 or with the mixture of 1.5 M Na2CO3 and 0.6 M NaHCO3. Crystallization of supersaturated solution in the first case has been shown to lead to the formation of previously unknown complex ammonium-magnesium carbonate. The results of X-ray, chemical, and differential thermal analyses have allowed the proposal of the following formula for the new magnesium compound: (NH4)2Mg(CO3)2.5H2O. In the second case, crystallization of magnesium carbonate leads to the formation of a pure phase of nesquegonite: MgCO3.3H2O of 99.9% purity. Samples of MgO obtained after annealing ammonium-magnesium precipitates at 773 K contain less than 10-3% of impurities.",

author = "Khamizov, {Ruslan Kh} and Dmitri Muraviev and Tikhonov, {Nikolai A.} and Krachak, {Anna N.} and Zhiguleva, {Tatyana I.} and Fokina, {Olga V.}",

year = "1998",

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doi = "10.1021/ie9707735",

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Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique. / Khamizov, Ruslan Kh; Muraviev, Dmitri; Tikhonov, Nikolai A.; Krachak, Anna N.; Zhiguleva, Tatyana I.; Fokina, Olga V.

In: Industrial & Engineering Chemistry Research, Vol. 37, No. 6, 01.01.1998, p. 2496-2501.

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

TY - JOUR

T1 - Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique

AU - Khamizov, Ruslan Kh

AU - Muraviev, Dmitri

AU - Tikhonov, Nikolai A.

AU - Krachak, Anna N.

AU - Zhiguleva, Tatyana I.

AU - Fokina, Olga V.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - This paper reports the results obtained by studying the ion-exchange isothermal supersaturation (IXISS) of magnesium carbonate solutions which is observed during elution of Mg2+ from carboxylic resin equilibrated with decalcinated seawater (artificial or natural) with either 2 M NH4HCO3 or with the mixture of 1.5 M Na2CO3 and 0.6 M NaHCO3. Crystallization of supersaturated solution in the first case has been shown to lead to the formation of previously unknown complex ammonium-magnesium carbonate. The results of X-ray, chemical, and differential thermal analyses have allowed the proposal of the following formula for the new magnesium compound: (NH4)2Mg(CO3)2.5H2O. In the second case, crystallization of magnesium carbonate leads to the formation of a pure phase of nesquegonite: MgCO3.3H2O of 99.9% purity. Samples of MgO obtained after annealing ammonium-magnesium precipitates at 773 K contain less than 10-3% of impurities.

AB - This paper reports the results obtained by studying the ion-exchange isothermal supersaturation (IXISS) of magnesium carbonate solutions which is observed during elution of Mg2+ from carboxylic resin equilibrated with decalcinated seawater (artificial or natural) with either 2 M NH4HCO3 or with the mixture of 1.5 M Na2CO3 and 0.6 M NaHCO3. Crystallization of supersaturated solution in the first case has been shown to lead to the formation of previously unknown complex ammonium-magnesium carbonate. The results of X-ray, chemical, and differential thermal analyses have allowed the proposal of the following formula for the new magnesium compound: (NH4)2Mg(CO3)2.5H2O. In the second case, crystallization of magnesium carbonate leads to the formation of a pure phase of nesquegonite: MgCO3.3H2O of 99.9% purity. Samples of MgO obtained after annealing ammonium-magnesium precipitates at 773 K contain less than 10-3% of impurities.

U2 - 10.1021/ie9707735

DO - 10.1021/ie9707735

M3 - Article

VL - 37

SP - 2496

EP - 2501

IS - 6

ER -

Clean ion-exchange technologies. 2. Recovery of high-purity magnesium compounds from seawater by an ion-exchange isothermal supersaturation technique

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