Year: 2010
Type: conference-paper
Abstract: This paper deals with synthesizing zeolite A and P using kaolinite as starting material and zeolite HS from smectite. A specific hydrothermal reactor, (allowing the control pH>9, temperature and a continuous stirring of the sample in the NaOH solution) was used to achieve these syntheses. Zeolites A and P were synthesized using respectively a well crystallised kaolinite (KTM), a poorly crystallised kaolinite (KGa 2 ) and metakaolinites derived from them by heating kaolinites at 500°C and 900°C. Zeolite HS was synthesized using a 2:1 clay mineral (SWy). The synthesis is obtained by reacting heated-smectite at 900°C with NaOH solution at T=120°C and pH >9. HS was formed from the 6th day in the optimal conditions of crystallization corresponding to 120°C and pH=9. The intermediate phases and final products were characterized by X-ray diffraction and high-resolution 29 Si and 27 Al MAS NMR spectroscopy.
Authors: M Meftah, W Oueslati, A Ben Haj Amara
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2016138552