Post-synthetic amine functionalized SAPO-5 & SAPO-34 molecular sieves for epoxide ring opening reactions

SAPO-5 and SAPO-34 molecular sieves were synthesized by hydrothermal method and modified via postsynthetic amine functionalization using aminopropyltriethoxysilane (APTES). Functionalized materials were thoroughly characterized using powder XRD, N2 adsorption, FT-IR, FE-SEM, TGA and 13C-CP MAS NMR. Syntheses of 0-phenoxy and 0-amino alcohols were studied via the ring opening of epoxide with nitrogen containing (amines) or oxygen containing (alcohols) nucleophiles, respectively. Amine functionalized SAPO-5 and SAPO-34 molecular sieves were found to be active in epoxide ring opening reaction of propylene oxide with phenol for the major production of 1-phenoxy-2-propanol. Reaction conditions were optimized to achieve higher conversion and selectivity. SAPO-5-NH2 was also found to be efficient with higher selectivity and conversion for other ring opening reactions using various epoxides and amines for the synthesis of 0-amino alcohols. The experimental studies were compared with and complemented by the theoretical parameters. (c) 2020 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Second International Symposium Functional Nanomaterials in Industrial Applications: Academy - Industry Meet.

Automated summary

SAPO-5 and SAPO-34 molecular sieves were synthesized and modified with amine functionalization, showing high activity and selectivity in epoxide ring opening reactions. Optimization of reaction conditions led to higher conversion and selectivity. Experimental results were compared and complemented with theoretical parameters.