N-Methylpyrrolidone is an important polar solvent with strong selectivity and good stability.
13X Molecular sieve , also called zeolite 13X , is one type of aluminosilicate crystal with average pores measuring of 9 angstrom (0.9 nm). Molecular with kinetic diameter smaller than 9 angstrom will be adsorbed by zeolite 13X, otherwise be excluded.
5A molecular sieve, generally also known as zeolite 5A ,it is a kind of molecular sieve with an effective pore opening of 5 angstroms, can absorb any molecule with kinetic diameter smaller than 5 Angstrom and exclude those larger. In addition to the functions of 3A and 4A molecular sieves, it can also adsorb C3-C4 normal alkanes, chloroethane, bromoethane, butanol, etc., and can also be used for the separation of normal isomers, pressure swing adsorption separation and the co-adsorption of water and carbon dioxide.
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