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This method is for determining the free water content of either fresh or used molecular sieves down to a lower limit of 0.1 mass-%. Free water content of fresh sieves is defined as the loss in mass as the result of a prescribed period of heating at 350 C. The free water content, calculated on a hydrocarbon free basis, and the volatile hydrocarbon content of used sieves can also be determined.
ASTM UOP434-83, Free Water and Volatile Hydrocarbon Content of Molecular Sieves, ASTM International, West Conshohocken, PA, 2002, www.astm.orgBack to Top