Mechanochemical Pretreatment for Efficient Solvent-Free Synthesis of SSZ-13 Zeolite

Chemistry. 2019 Sep 18;25(52):12068-12073. doi: 10.1002/chem.201902107. Epub 2019 Aug 5.

Abstract

The economical and environmentally benign synthesis of SSZ-13 zeolite was possible due to the mechanochemical activation of dry reagents by planetary mill. Contrary to manual grinding in a mortar, the proposed automatized approach is scalable and reproducible. This solvent-free process provided a huge gain in product/gel ratios, significantly minimized reaction space and organic structure-directing agent use, and allowed for the elimination of agitation. Obtained materials were comparable to the product of "classical" syntheses. The use of different silica sources resulted in SSZ-13 zeolites with various characteristics: different Si/Al ratio and crystal size.

Keywords: mechanochemistry; planetary mill; solvent-free; synthesis; zeolites.