Validation of analysers used for monitoring H2O at the outlet of molecular sieve
dryer vessels is important because under normal operating conditions no H2O will be present for extended periods of time.
The chemical activity of two kinds of molecular sieve
, AlPO4-5 molecular sieve
and SBA-15 molecular sieve
was tested in the specific reactor between 2-mercapto-[1, 3, 4] thiadiazde ( 1.32 g 10mmol ) and unsaturated acid oleic acid at 45 AdegC for 1 hour.
After doping with Ce, the acid density of the molecular sieve
The 4 A molecular sieves
and formaldehyde were used as a removable solid template and weak reductant in the process, respectively The virtue of this method is that we can avoid the use of nonvolatile surfactants and polymers.
Among the SAPO molecular sieves
, the SAPO-34 catalyst has high selectivity for light olefins production due to its shape selectivity during the methanol to light olefins (MTO) and DTO reactions; numerous studies have been conducted to improve the lifetime of this catalyst [9-22].
In 1956, I had the opportunity to join the molecular sieve
synthesis group working with Don Breck and leaped at the chance.
To improve on nature's molecular sieves
, many researchers are developing synthetic varieties whose properties they can tailor (SN: 6/23/01, p.
Indeed, a molecular sieve
enclosed in a polymer cage with void space between the two phases appears to be the picture (shown in a schematic representation in Fig.
Monomers must be purified and dried by molecular sieves
Summary: The Zeolite Molecular Sieves
Market is projected to have the highest growth during the forecast period.
Grace will increase the price of silica-based and molecular sieve
products sold through its Grace Materials Technologies business segment by 7% as contracts allow.