Modified crystalline aluminosilicate zeolites and process for their preparation
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United States of America Patent
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Feb 14, 1995
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N/A
app pub date -
Jun 1, 1994
filing date -
Apr 11, 1990
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Expired
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Abstract
A process for the manufacture of a modified aluminosilicate zeolite is disclosed which includes contacting a starting zeolite in an aqueous phase with a dealuminating agent at a pH value of lower than 4 in the presence of a soluble silica. A novel zeolite composition is also disclosed which has increased acid and thermal stability.
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