A novel method of Al-pillared montmorillonite preparation for potential industrial up-scaling
Source abstract
Abstract
Abstract A novel method of preparing Al-pillared montmorillonite has been developed. The process uses a minimum amount of liquid and is simpler to operate than the conventional method of pillaring. Here, the pillaring agent (solid Al 13 nitrate) is ground together with the powdered raw montmorillonite (from Wyoming) and dialysed against a limited volume of deionised water. The resultant Al-intercalated clay is heated at 300 °C and characterized by X-ray diffraction, nitrogen sorption, and chemical analysis. The results are compared with those obtained for Al-pillared inter-layered clays (PILC) prepared by conventional procedure. Besides yielding a highly microporous and crystalline products, the new method offers the potential for extension to an industrial-scale process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Mesoporous Materials and Catalysis · Zeolite Catalysis and Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
1. CEC of clays: measurement by adsorption of a copper ethylenediamine complex10.1016/S0169-1317(97)00012-4 ↗
2. Preparation of PILC-Al through dialysis bags: a comparative study10.1016/0169-1317(94)90019-1 ↗
3. Synthesis of aluminum-pillared montmorillonites using highly concentrated clay suspensions10.1016/S0926-860X(97)00081-1 ↗
4. Preliminary results on the properties of pillared clays by mixed Al–Cu solutions10.1016/S0169-1317(97)00016-1 ↗
5. On the chemistry of the Keggin Al13 polymer acid–base properties10.1016/0021-9797(92)90391-X ↗
6. Hydroxy-Al pillaring of concentrated clay suspensions10.1346/CCMN.1992.0400413 ↗
7. Al-pillared clays: from lab syntheses to pilot scale production; characterisation and catalytic properties10.1016/S0926-860X(97)00194-4 ↗
8. Preparation of Al-pillared montmorillonite from concentrated dispersions10.1016/S0169-1317(02)00133-3 ↗
9. Influence of the preparation parameters (particle size and aluminium concentration) on the textural properties of Al-pillared clays for a scale-up process10.1016/S1387-1811(97)00057-7 ↗
10. Pillaring of saponite in concentrated medium10.1180/claymin.1992.027.2.09 ↗
11. The Al pillaring of clays: Part I. Pillaring with dilute and concentrated Al solutions10.1346/CCMN.1993.0410510 ↗
12. The Al pillaring of clays: Part II. Pillaring with [Al13O4(OH)24(H2O)12]7+10.1346/CCMN.1994.0420502 ↗
13. Preparation of hydroxyl Al and Al/Fe pillared bentonites from concentrated clay suspensions10.1016/0927-6513(95)00081-X ↗
14. Hydroxyl Al pillaring of concentrated suspensions of smectite clays10.1016/S1387-1811(97)00045-0 ↗
15. Pillared clays—a historical perspective10.1016/0920-5861(88)85002-8 ↗
16. Al-Pillaring of saponite with the Al polycation [Al13(OH)24(H2O)24]15+ using a new synthetic route10.1346/CCMN.2003.0510206 ↗