Dealumination of faujasite-type zeolites using ion exchange resins
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United States of America Patent
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Apr 23, 1985
Grant Date -
N/A
app pub date -
Aug 22, 1983
filing date -
Aug 22, 1983
priority date (Note) -
Expired
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Abstract
Faujasite-type zeolites of high catalytic activity, low coke-forming property and stable crystalline structure are prepared by using a combination of hydrothermal treatment and ion exchange resin removal of aluminum from the crystalline structure of the zeolites. The process allows for a substantial increase of the silica-to-alumina ratio in the zeolite without detrimentally affecting the strength of the structure.
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