Silica-stabilized alumina

Details Silica-stabilized alumina Silica-stabilized alumina

1992-05-13

1993-12-28

Dees, Carl F.

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

Catalyst or precursor therefor

Silicon containing or process of making

502263, B01J 2112

Patent

active

052739490

ABSTRACT:
Thermally stable alumina having a high specific surface at elevated temperatures, well suited as a catalyst support material, e.g., as the support substrate of catalysts useful for the conversion of exhaust gases emanating from internal combustion engines, contain an effective heat stabilizing amount of silica, such silica essentially being distributed within the crystalline network/structure of the alumina, and such silica-stabilized alumina having an isoelectric point above 7 and a reduced capacity for the isomerization of olefins.

REFERENCES:
patent: 2394796 (1946-02-01), Marisic
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patent: 4438219 (1984-03-01), Brandenburg et al.
patent: 4722920 (1988-02-01), Kimura et al.
patent: 4959338 (1990-09-01), Miura et al.
Chemical Abstracts, vol. 95, No. 20, p. 467, Nov. 16, 1981, No. 176314f, Columbus, Ohio, U.S.; K. Jiratova, "Isoelectric Point of Modified Aluminia", Appl. Catal. (1981), vol. 1, Nos. 3, 4, pp. 165-167.
Chemical Abstracts, vol. 84, No. 26, 28, Jun. 1976, p. 345, No. 185386f, Columbus, Ohio, U.S.; B. E. Yoldas, "Thermal Stabilization of an Active Alumina and Effect of Dopants on the Surface Area", J. Mater. Sci. (1976), vol. 11, No. 3, pp. 465-470.

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