Total synthesis and natural products Al2O3 for sorbent
In what cases should you use Al2O3 instead of SiO2? I've never worked with it. Is it any better than silica?
@chaoticgood A variety of aluminum oxide modifications, high activity of aluminum oxide, thermodynamic stability. An important positive ability of aluminum oxide is its water resistance, as well as its production in large volume.
@damiryagudin So it is cheaper and more active? Why then SiO2 is more abandoned?
@chaoticgood Yes, but silica gel is also one of the most common mineral adsorbents in industrial practice, which has a well-developed porosity.
Everyone has their own advantages and disadvantages.
One common disadvantage is instability in alkaline media
@chaoticgood Aluminum oxide Al2O3 is used with a high moisture content of the drained gas, it is used as a protective layer for silica gel SiO2 when drying very wet gas in order to prevent cracking of the main layer of the desiccant - silica gel SiO2.
@damiryagudin Thank you! So it is used for gas chromatography as well as column one?
@damiryagudin Interestingly, it turns out that aluminum oxide absorbs moisture more efficiently than silicon dioxide?
@argentum Yes, it is the active aluminum oxide, which is more often used as an adsorbent.
I can definitely say the absorption capacity depends on the porous structure of the adsorbent, the adsorption conditions, and the shape of the adsorbent.
@damiryagudin thanks, well, on average, the sorption capacity of these two sorbents is the same?