Method for improving vermiculite's intake of ammonium ions, absorption material, its uses and method of removing ammonium from environment
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United States of America Patent
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Apr 19, 2011
Grant Date -
Jun 3, 2010
app pub date -
Jun 30, 2006
filing date -
Jul 1, 2005
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Abstract
The invention relates to a method for improving vermiculite's intake of ammonium, in which method heating of the crude vermiculite is conducted to a temperature where vermiculite's third dehydration step takes place, the temperature being lower than the temperature where vermiculite's fourth dehydration/dehydroxylation step takes place. The invention relates also to use of the obtained vermiculite and to an absorption material, comprising vermiculite material and additives, where at least 50% of the vermiculite material comprises vermiculite, which has undergone the third dehydration step but not the fourth dehydration/dehydroxylation step. The invention relates also to use of thermally treated and ammonium doped vermiculite as fertilizer/soil conditioner.
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