Molecular sieve with point-sieving structure, its preparation method, and application in adsorptive separation of propylene and propane thereof

Abstract

The present invention discloses a molecular sieve with a point-sieving structure, its preparation method, and its application in the adsorptive separation of propylene and propane. The molecular sieve is formed through coordination bonds among 1,2-ethanedisulfonate anions, 4,4′-dipyridyl sulfide, and Cu2+, with the chemical formula [MSL2]∞, where M represents Cu2+, S denotes the 1,2-ethanedisulfonate anion, L denotes 4,4′-dipyridyl sulfide, and ∞ indicates that the molecular sieve is spatially extended from multiple MSL2 structural units. The molecular sieve features localized point-like pore constrictions. Preparation Method: A Cu2+ source, 1,2-ethanedisulfonate salt, and 4,4′-dipyridyl sulfide are mixed and reacted in a reaction solvent to obtain the molecular sieve. The present invention exhibits outstanding advantages, including excellent material stability, high adsorption selectivity, large adsorption capacity, rapid adsorption kinetics, and ease of regeneration, demonstrating significant industrial application.

Dependencies are inferred from the claim text.