Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Faujasite type
Patent
1992-10-20
1993-08-10
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Faujasite type
502 60, B01J 2914, B01J 3730
Patent
active
052348768
ABSTRACT:
Thermally stable Cr-zeolites and Cu-Cr-zeolites, and methods of making same are disclosed. The zeolites have a SiO.sub.2 to Al.sub.2 O.sub.3 mole ratio of about 3 to about 200, and an initial alkali content of less than about about 0.5% by weight based on the alkali oxide. Chromium ions are exchanged into the zeolite to produce Cr-zeolite in which the Cr level is greater than about 0.5% by weight. Copper and chromium ions are provided exchanged on a zeolite to produce Cu-Cr-zeolite. The respective Cr-exchanged zeolites are heat-treated to produce the thermally stable zeolites wherein the BET surface area upon exposure to temperatures of up to about 1000.degree. C. is at least about 50% of the BET surface area of the respective thermally stable zeolites at about room temperature, prior to the exposure to temperatures of up to about 1000.degree. C.
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Swaroop Srinivas H.
Wusirika Raja R.
Corning Incorporated
Dees Carl F.
Quatrini L. Rita
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