HYDROTHERMAL TRANSFORMATION OF KAOLINITE IN THE SYSTEM K2O-SiO2-Al2O3-H2O
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional de Colombia
2010
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| _version_ | 1876434224277356544 |
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| author | CARLOS ALBERTO RIOS REYES |
| author_facet | CARLOS ALBERTO RIOS REYES |
| contents | HYDROTHERMAL TRANSFORMATION OF KAOLINITE IN THE SYSTEM K2O-SiO2-Al2O3-H2O CARLOS ALBERTO RIOS REYES CRAIG DENVER WILLIAMS Ingeniería zeolites Kaolinite dissolution precipitation potassium hydroxide A kaoliniterich raw material was treated hydrothermally with 1.33 and 3.99M KOH solutions at 100 and 175 °C during different reaction times ranging from 24 to 528 h. The synthesis products were characterized by Xray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, magic angle spinning nuclear magnetic resonance and thermogravimetric analysis in order to elucidate their physicochemical and mineralogical characteristics. The transformation of the starting material in KOH solutions can be explained by two different processes: (1) dissolution and (2) precipitation. A series of crystalline phases summarized by the reaction sequence kaolinite ® chabazite ® edingtonite ® unidentified potassium aluminosilicate phase ® kalsilite + leucite was identified in the system K2OSiO2Al2O3H2O. The solid products show, on the other hand, remarkable textural and structural differences with the starting material. 2010 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49615099007 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.163 Vol.77 |
| format | Artículo científico |
| id | redalyc_49615099007 |
| institution | Redalyc |
| language | en |
| publishDate | 2010 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | HYDROTHERMAL TRANSFORMATION OF KAOLINITE IN THE SYSTEM K2O-SiO2-Al2O3-H2O CARLOS ALBERTO RIOS REYES Ingeniería zeolites Kaolinite dissolution precipitation potassium hydroxide HYDROTHERMAL TRANSFORMATION OF KAOLINITE IN THE SYSTEM K2O-SiO2-Al2O3-H2O CARLOS ALBERTO RIOS REYES CRAIG DENVER WILLIAMS Ingeniería zeolites Kaolinite dissolution precipitation potassium hydroxide A kaoliniterich raw material was treated hydrothermally with 1.33 and 3.99M KOH solutions at 100 and 175 °C during different reaction times ranging from 24 to 528 h. The synthesis products were characterized by Xray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, magic angle spinning nuclear magnetic resonance and thermogravimetric analysis in order to elucidate their physicochemical and mineralogical characteristics. The transformation of the starting material in KOH solutions can be explained by two different processes: (1) dissolution and (2) precipitation. A series of crystalline phases summarized by the reaction sequence kaolinite ® chabazite ® edingtonite ® unidentified potassium aluminosilicate phase ® kalsilite + leucite was identified in the system K2OSiO2Al2O3H2O. The solid products show, on the other hand, remarkable textural and structural differences with the starting material. 2010 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49615099007 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.163 Vol.77 |
| title | HYDROTHERMAL TRANSFORMATION OF KAOLINITE IN THE SYSTEM K2O-SiO2-Al2O3-H2O |
| topic | Ingeniería zeolites Kaolinite dissolution precipitation potassium hydroxide |
| url | https://www.redalyc.org/articulo.oa?id=49615099007 |