Reactions of metakaolinite with NaOH and colloidal silica - Comparison of different samples (part 2)

I. Lapides; L. Heller-Kallai

doi:10.1016/j.clay.2006.06.007

Reactions of metakaolinite with NaOH and colloidal silica - Comparison of different samples (part 2)

I. Lapides
, L. Heller-Kallai^*

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

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

35 Scopus citations

Abstract

The eight metakaolinites studied in Part 1 were reacted hydrothermally with NaOH and silica gel. After induction periods that were much longer than in the absence of additional silica the main products formed were zeolite A and X in different proportions, associated with minor amounts of zeolite P. The ratio of zeolite X to A formed after 120 h was greater in samples with longer induction periods. In samples with shorter induction periods crystals of zeolite X coated crystals of zeolite A, evidently shielding them from further reaction. No correlation could be established between any observed feature of the starting kaolinite and the product assemblages.

Original language	English
Pages (from-to)	94-98
Number of pages	5
Journal	Applied Clay Science
Volume	35
Issue number	1-2
DOIs	https://doi.org/10.1016/j.clay.2006.06.007
State	Published - Jan 2007

Keywords

Metakaolinite
Silica gel
Zeolite A
Zeolite P
Zeolite X

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10.1016/j.clay.2006.06.007

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abstract = "The eight metakaolinites studied in Part 1 were reacted hydrothermally with NaOH and silica gel. After induction periods that were much longer than in the absence of additional silica the main products formed were zeolite A and X in different proportions, associated with minor amounts of zeolite P. The ratio of zeolite X to A formed after 120 h was greater in samples with longer induction periods. In samples with shorter induction periods crystals of zeolite X coated crystals of zeolite A, evidently shielding them from further reaction. No correlation could be established between any observed feature of the starting kaolinite and the product assemblages.",

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author = "I. Lapides and L. Heller-Kallai",

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N2 - The eight metakaolinites studied in Part 1 were reacted hydrothermally with NaOH and silica gel. After induction periods that were much longer than in the absence of additional silica the main products formed were zeolite A and X in different proportions, associated with minor amounts of zeolite P. The ratio of zeolite X to A formed after 120 h was greater in samples with longer induction periods. In samples with shorter induction periods crystals of zeolite X coated crystals of zeolite A, evidently shielding them from further reaction. No correlation could be established between any observed feature of the starting kaolinite and the product assemblages.

AB - The eight metakaolinites studied in Part 1 were reacted hydrothermally with NaOH and silica gel. After induction periods that were much longer than in the absence of additional silica the main products formed were zeolite A and X in different proportions, associated with minor amounts of zeolite P. The ratio of zeolite X to A formed after 120 h was greater in samples with longer induction periods. In samples with shorter induction periods crystals of zeolite X coated crystals of zeolite A, evidently shielding them from further reaction. No correlation could be established between any observed feature of the starting kaolinite and the product assemblages.

KW - Metakaolinite

KW - Silica gel

KW - Zeolite A

KW - Zeolite P

KW - Zeolite X

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JO - Applied Clay Science

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ER -

Reactions of metakaolinite with NaOH and colloidal silica - Comparison of different samples (part 2)

Abstract

Keywords

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