In Figure 1, we can see the main characteristic peate of the Y-type zeolite
molecular sieves. The external and internal stretching vibration absorption peaks of tetrahedron Si[O.sub.4] appeared at 1,140, 1,036, 792, and 696 [cm.sup.-1], respectively.
Molecular sieves coated with silver particles were prepared using a modificatory method described by Saito and coworkers [32].
The roots of
molecular sieves go back to 1756, when a Swedish mineralogist by the name of Cronstedt first discovered intriguing crystals in nature that seemed to froth or boil when heated in a blowpipe flame.
The relatively low level of hydrolysis suggests that the use of
molecular sieves is an effective way to control such undesirable process.
To improve on nature's
molecular sieves, many researchers are developing synthetic varieties whose properties they can tailor (SN: 6/23/01, p.
Monomers must be purified and dried by
molecular sieves.
He was the main organizer of numerous conferences including the 9th Canadian Symposium on Catalysis (Quebec 1984), a post congress symposium (Quebec 1988), the 35th Canadian Chemical Engineering Conference (1995), an International Zeolite Symposium (Quebec 1995), the 15th Canadian Symposium on Catalysis (Quebec 1998) and the first International Symposium on Mesoporous
Molecular Sieves (Baltimore 1998).
Summary: The Zeolite
Molecular Sieves Market is projected to have the highest growth during the forecast period.