... propylene etc. for desiccant application. Properties Molecular Sieve 4A: Pore size of molecular sieve 4A, mainly for absorbing water, methanol, ... industrial applications, the adsorption rate of the 4A molecular sieve we produce is much faster with more regeneration times ... the separation of methane, ethane and propane. Conservation of molecular sieve 4A: 1. Room temperature, humidity <90%, non-expose ...