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Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes

This work describes the synthesis and characterization of pillared clays using a new pillaring method: the reuse of the pillaring solution. First, an Al pillared clay (PILC) was synthesized, and after filtration, the pillaring agent was stored and reused for an additional three pillaring procedures...

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Detalles Bibliográficos
Autores principales: Bertella, Francine, Pergher, Sibele B. C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5551748/
https://www.ncbi.nlm.nih.gov/pubmed/28773068
http://dx.doi.org/10.3390/ma10070705
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author Bertella, Francine
Pergher, Sibele B. C.
author_facet Bertella, Francine
Pergher, Sibele B. C.
author_sort Bertella, Francine
collection PubMed
description This work describes the synthesis and characterization of pillared clays using a new pillaring method: the reuse of the pillaring solution. First, an Al pillared clay (PILC) was synthesized, and after filtration, the pillaring agent was stored and reused for an additional three pillaring procedures (P1, P2, and P3). The filtered pillaring solution was stored for one year and then reused for one additional pillaring procedure (P4). The samples were analyzed using XRD, N(2) physisorption measurements and chemical analysis (EDX). All of the samples exhibited basal spacings larger than 17 Å and BET surface areas greater than 160 m(2)/g. After the P4 pillaring, the pillaring agent was precipitated with a Na(2)SO(4) solution, and the resulting solid was analyzed using XRD and SEM. The results indicated that even after a total of five pillaring procedures, Al(13) ions were still present in solution. Therefore, it is possible to reuse the pillaring solution four times and to even store the solution for one year, which is important from an industrial perspective.
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spelling pubmed-55517482017-08-11 Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes Bertella, Francine Pergher, Sibele B. C. Materials (Basel) Article This work describes the synthesis and characterization of pillared clays using a new pillaring method: the reuse of the pillaring solution. First, an Al pillared clay (PILC) was synthesized, and after filtration, the pillaring agent was stored and reused for an additional three pillaring procedures (P1, P2, and P3). The filtered pillaring solution was stored for one year and then reused for one additional pillaring procedure (P4). The samples were analyzed using XRD, N(2) physisorption measurements and chemical analysis (EDX). All of the samples exhibited basal spacings larger than 17 Å and BET surface areas greater than 160 m(2)/g. After the P4 pillaring, the pillaring agent was precipitated with a Na(2)SO(4) solution, and the resulting solid was analyzed using XRD and SEM. The results indicated that even after a total of five pillaring procedures, Al(13) ions were still present in solution. Therefore, it is possible to reuse the pillaring solution four times and to even store the solution for one year, which is important from an industrial perspective. MDPI 2017-06-27 /pmc/articles/PMC5551748/ /pubmed/28773068 http://dx.doi.org/10.3390/ma10070705 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bertella, Francine
Pergher, Sibele B. C.
Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title_full Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title_fullStr Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title_full_unstemmed Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title_short Reuse of Pillaring Agent in Sequential Bentonite Pillaring Processes
title_sort reuse of pillaring agent in sequential bentonite pillaring processes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5551748/
https://www.ncbi.nlm.nih.gov/pubmed/28773068
http://dx.doi.org/10.3390/ma10070705
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