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Zeolite synthesis using novel structure directing agents

Publisher
Elsevier Science
Year
2009
Weight
59 KB
Volume
2009
Category
Article
ISSN
1351-4180

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โœฆ Synopsis

US labour union seeks end to HF in refineries

The United Steelworkers union is appealing for a phaseout of hydrogen fluoride (HF) alkylation units in the USA for safety reasons. The National Petrochemical & Refiners Association opposed the call, arguing that HF is safe like other catalysts and is an important production component.

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Alkylammonium polycations as structure-d
Alkylammonium polycations as structure-directing agents in MFI zeolite synthesis
โœ Larry W Beck; Mark E Davis ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 427 KB

Silicate and aluminosilicate MFI-type zeolites are synthesized with di-and triquaternary ammonium cations as structure-directing agents (SDA). Solid-state NMR spectra show that polycations are intact in the as-synthesized zeolites. Materials synthesized with polycationic molecules are compared to ze