### Abstract

A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, Pi(s) = [Si(OH)(4)][Al(OH4-][Na+] = 1.2 x 10(-8) M-3, from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M less than or equal to [Na] less than or equal to 4 M, 353 K less than or equal to T less than or equal to 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.

Language | English |
---|---|

Pages | 173-179 |

Number of pages | 7 |

Journal | Microporous Materials |

Volume | 10 |

Issue number | 4-6 |

DOIs | |

Publication status | Published - Jul 1997 |

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### Keywords

- aqueous aluminosilicate solution
- solubility product
- supersaturation
- thermodynamic equilibrium model
- Zeolite A

### Cite this

*Microporous Materials*,

*10*(4-6), 173-179. https://doi.org/10.1016/S0927-6513(97)00007-2

}

*Microporous Materials*, vol. 10, no. 4-6, pp. 173-179. https://doi.org/10.1016/S0927-6513(97)00007-2

**What is the solubility of zeolite A?** / Sefcik, J ; McCormick, A V .

Research output: Contribution to journal › Article

TY - JOUR

T1 - What is the solubility of zeolite A?

AU - Sefcik, J

AU - McCormick, A V

PY - 1997/7

Y1 - 1997/7

N2 - A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, Pi(s) = [Si(OH)(4)][Al(OH4-][Na+] = 1.2 x 10(-8) M-3, from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M less than or equal to [Na] less than or equal to 4 M, 353 K less than or equal to T less than or equal to 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.

AB - A meaningful solubility product of a zeolite should remain constant as composition of zeolite mother liquors varies at a given temperature. We identify a solubility product of zeolite A, Pi(s) = [Si(OH)(4)][Al(OH4-][Na+] = 1.2 x 10(-8) M-3, from experimental data in highly alkaline aqueous solutions under conditions typical for zeolite A synthesis (1 M less than or equal to [Na] less than or equal to 4 M, 353 K less than or equal to T less than or equal to 363 K). To accomplish this we develop a thermodynamic model of dilute sodium aluminosilicate solutions representing mother liquors in equilibrium with zeolite A. Proper modeling of the liquid phase adjacent to a growing zeolite is necessary to obtain meaningful supersaturation values and solubility products. Further quantitative modeling of solution mediated zeolite growth and dissolution should include a physically relevant model of aluminosilicate speciation in the liquid phase.

KW - aqueous aluminosilicate solution

KW - solubility product

KW - supersaturation

KW - thermodynamic equilibrium model

KW - Zeolite A

U2 - 10.1016/S0927-6513(97)00007-2

DO - 10.1016/S0927-6513(97)00007-2

M3 - Article

VL - 10

SP - 173

EP - 179

JO - Microporous Materials

T2 - Microporous Materials

JF - Microporous Materials

SN - 0927-6513

IS - 4-6

ER -