Sustainable and cost-efficient approach to obtain hierarchical MWW-type zeolites was developed through the use of silica extracted from rice husk ash; which is the largest agro-industrial waste product in the word. The effect of the concentration of OHions was determined in the synthesis of MWW-type zeolites with various chemical compositions. In addition, procedures to achieve hierarchical pillared and desilicated materials were assessed in order to obtain nano-architectures featuring intercrystalline or intracrystalline mesoporores. Nature and strength of acidity of materials was investigated through pyridine chemisorptions followed by IR. The impact of texture and acidity was evaluated on the acetalization reactions to produce bulky products. Synthesis of MWW zeolites with hierarchical pore architectures was realized using silica extracted from an agro-industrial residue, rice husk ash
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