Thermal analysis of sepiolite and palygorskite treated with butylamine

U. Shuali; M. Steinberg; S. Yariv; M. Muller-Vonmoos; G. Kahr; A. Rub

doi:10.1180/claymin.1990.025.1.12

Thermal analysis of sepiolite and palygorskite treated with butylamine

U. Shuali, M. Steinberg, S. Yariv, M. Muller-Vonmoos, G. Kahr, A. Rub

Institute of Chemistry

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Abstract

The thermal behaviour of sepiolite and palygorskite treated with butylamine was investigated by DTA, TG and EGA-MS under a flow of air and N₂. It was shown that the amine was adsorbed by the clays, penetrating into the pores and replacing zeolitic and bound water. The presence of amine in the pores shifted the dehydroxylation peak to temperatures higher than for the untreated clays. In addition to desorption, reactions of pyrolysis and condensation to charcoal were detected by the evolution of NH₃, CH₄ or H₂, respectively. -from Authors

Original language	English
Pages (from-to)	107-119
Number of pages	13
Journal	Clay Minerals
Volume	25
Issue number	1
DOIs	https://doi.org/10.1180/claymin.1990.025.1.12
State	Published - 1990

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10.1180/claymin.1990.025.1.12

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abstract = "The thermal behaviour of sepiolite and palygorskite treated with butylamine was investigated by DTA, TG and EGA-MS under a flow of air and N2. It was shown that the amine was adsorbed by the clays, penetrating into the pores and replacing zeolitic and bound water. The presence of amine in the pores shifted the dehydroxylation peak to temperatures higher than for the untreated clays. In addition to desorption, reactions of pyrolysis and condensation to charcoal were detected by the evolution of NH3, CH4 or H2, respectively. -from Authors",

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AU - Kahr, G.

AU - Rub, A.

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N2 - The thermal behaviour of sepiolite and palygorskite treated with butylamine was investigated by DTA, TG and EGA-MS under a flow of air and N2. It was shown that the amine was adsorbed by the clays, penetrating into the pores and replacing zeolitic and bound water. The presence of amine in the pores shifted the dehydroxylation peak to temperatures higher than for the untreated clays. In addition to desorption, reactions of pyrolysis and condensation to charcoal were detected by the evolution of NH3, CH4 or H2, respectively. -from Authors

AB - The thermal behaviour of sepiolite and palygorskite treated with butylamine was investigated by DTA, TG and EGA-MS under a flow of air and N2. It was shown that the amine was adsorbed by the clays, penetrating into the pores and replacing zeolitic and bound water. The presence of amine in the pores shifted the dehydroxylation peak to temperatures higher than for the untreated clays. In addition to desorption, reactions of pyrolysis and condensation to charcoal were detected by the evolution of NH3, CH4 or H2, respectively. -from Authors

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Thermal analysis of sepiolite and palygorskite treated with butylamine

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