Hydrothermally stable alumina

Details Hydrothermally stable alumina Hydrothermally stable alumina

2011-07-19

2011-07-19

Silverman, Stanley (Department: 1736)

Catalyst, solid sorbent, or support therefor: product or process

Miscellaneous

C423S600000, C423S327100, C423S230000, C423S245100, C423S219000, C502S407000, C502S415000, C210S660000, C095S090000

Reexamination Certificate

active

07981836

ABSTRACT:
The hydrothermal stability of transition aluminas used as adsorbents and catalyst carriers is improved through their treatment with a soluble silicon inorganic compound such as sodium silicate wherein the silicon compound is mixed with the alumina powder at the production stage of forming particulates by liquid addition. The silicon containing particulates are activated by heating at a temperature lower than 500° C. and treated, before or after the thermal activation, by a colloidal silica solution to produce a hydrothermally stable, low dust alumina. The total silica content of the final product is typically less than 5 mass-%.

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