Zeolite containing cation exchangers methods for preparation and use
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United States of America Patent
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Nov 2, 1999
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app pub date -
May 26, 1998
filing date -
Jun 27, 1996
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Abstract
The present invention concerns zeolitic cation exchangers consisting of expanded ceramic, zeolitic pellets with macro- and microporosity, in the form of sintered, light, expanded clay aggregates which are partly transformed to zeolite by means of hydrothermal treatment with an alkaline solution for a period of at least 2 hours at a temperature of between 50 and 300 degrees C. The invention also concerns a procedure for producing said cation exchangers, and applications of the same as ion exchangers and adsorbents.
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