The other, worth $100,000, went to Edith Flanigen for her pioneering work with zeolite Y, a molecular sieve used widely in petroleum refinement.
Bagshaw et al. prepared mesoporous silica molecular sieves using nonionic polyethylene oxide surfactants in a neutral condition [143].
The molecular sieves used were microporous zeolites such as HZSM-5, HY, Hβ and mesoporous MCM-41 material and the results are compared.
The objective of this work is modeling and experimental studies on the thermal regeneration of the 3A and 4A zeolite molecular sieves used for dewatering of liquid aliphatic alcohols: ethanol, propanol and butanol in temperature swing adsorption (TSA) process.
According to some producers of dehydrated ethanol, higher concentrations of pollutants in the raw spirit (unpurified ethyl alcohol) can cause fast deterioration of molecular sieves used in the process of ethanol dehydration [ 21].
The headspace gas was analyzed using an Agilent 7890 A GC equipped with a 5 Å molecular sieve column, using N2 carrier gas with a flow rate of approximately 3 mL min−1.
The expressed proteins were purified by Sephacryl S-300 HR size exclusion chromatography, the peak fractions collected were concentrated and repurified by molecular sieve HPLC using a 600 mm×7.8 mm BIOSEP-SEC 4000 column (Phenomenex).
A comparison was made for: kinetic separation using molecular sieve carbon, equilibrium separation using 5A zeolite, and membrane separation.
Type 3 Å molecular sieves were used to dry the CH3CN before use.
Molecular sieves are used for drying gases and liquids and for separating molecules on the basis of their sizes and shapes.
