Solid−Liquid Phase Diagram for the System MgCl2−NH3−CH3OH at 298 K
| Autor: | Roman Ruzbacky, David H. Jenkins, Mark I. Pownceby |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Journal of Chemical & Engineering Data. 55:2428-2433 |
| ISSN: | 1520-5134 0021-9568 |
| DOI: | 10.1021/je9008359 |
| Popis: | The ammoniated magnesium chloride compounds MgCl2·nNH3, where n is 2, 4, or 6, are potentially usable as materials for producing anhydrous magnesium chloride. The MgCl2−NH3−CH3OH system was investigated at 298 K to determine phase stability regions for hexammoniate (HEX), tetrammoniate (TET), and diammoniate (DI). Five phase regions were determined. These were: HEX+Liq, HEX+T+TLiq, T+TLiq, MgCl2·6CH3OH+T+TLiq, and a ternary liquid phase, TLiq. The phase represented by the symbol T is a previously unknown ternary compound of composition MgCl2·4NH3·2CH3OH, and Liq refers to the liquid phase with a composition along, or very close to, the NH3−CH3OH binary. An additional five phase regions were also predicted based on the existence of known crystalline phases. These were: HEX+Liq(17.45 %NH3/MeOH)+NH3, HEX+TET+T, TET+DI+T, DI+T+MgCl2, and MgCl2·6CH3OH+T+MgCl2. The ternary phase was unstable, breaking down to produce ammonium chloride, ammonia, and magnesium methoxide (Mg(CH3O)2). These were all partially solub... |
| Databáze: | OpenAIRE |
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