3A,4A,5A,10X,13X molecular sieve as catalyst for air separation industry 1. ... 1/16 inch 1/8 inc 3A,4A,5A,10X,13X molecular sieve as catalyst for air separation industryMolecular Sieve 3A ... present, and on the conditions of the process. Size 3A – zeolite are available in beads of 1-2 mm, (10x18 mesh ... , or must to be reactivated. 3A,4A,5A,10X,13X molecular sieve as catalyst for air separation industry