I'm looking to remove trace amounts of water from both materials in order to study them without said water contamination.
Molecular sieves 3A, thus with about 3 ångström pore size, can seemingly be used for drying n-butanol or n-heptane. However, being potassium aluminosilicate based, they can be generally expected to be more reactive than the sodium aluminosilicate based of type 4A. Type 4A molecular sieves could also remove other impurities besides water, such as ethane, traces of which might possibly accompany n-heptane. On the other hand, 3A sieves may be expected to be somewhat more efficient than 4A for drying both compounds. Both types can be expected to reduce the water content to less than about 10 ppm. Little information is available comparing the possible effects of using either 3A or 4A molecular sieves for drying n-butanol or n-heptane. Alternatively; n-butanol could also be also dried with CaO, CaSO4, MgSO4, K2CO3, or NaOH; while n-heptane could be dried with P2O5, CaSO4, MgSO4, CaCl2, or silica gel. Metallic Na could also be complementarily used, to eliminate the last traces of water from both the compounds.
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