Variables in the synthesis of unusually high pore volume aluminas

Conference · Thu Sep 01 04:00:00 EDT 1988 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5069350

Armor, J N ^[1]; Carlson, E J

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1. Air Products and Chemicals, Inc., Allentown, PA (USA)

Aerogels are unique, high porous solids prepared by the removal of solvent from a wet gel at a temperature above the critical temperature of the solvent. This paper summarizes their successful efforts to obtain high pore volume aluminas (> 50 cm{sup 3}g{sup {minus}1}). The pore volumes of these aerogels, prepared by the hydrolysis of aluminum isopropoxide (AIP) in alcoholic media, are very sensitive to the amounts of water and alcohol employed in the synthesis. An unexpectedly large ratio of water to alkoxide yields the highest pore volumes. By suitable selection of initial levels of aluminum alkoxides, methanol and water, one obtains high surface area aluminas with average pore volumes of 8.6 cm{sup 3}/g{sup {minus}1}. A two-step formulation of AIP, methanol, and water followed by hypercritical solvent removal to form the alumina aerogel yields the highest pore volumes. Such materials have utility as catalyst supports, especially for polymerization reactions.

• OSTI ID: 5069350
• Report Number(s): CONF-880939--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 33:4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DECOMPOSITION
EXPERIMENTAL DATA
HYDROLYSIS
INFORMATION
LYSIS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POROSITY
SOLVOLYSIS
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
VOLUME