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AssigneeHydro Agri Deutschland GmbH
InventorsHermann Kuhlmann, Paul Seward, Josef Christian Buhl, Kirstin Beavers, Manfred Schenk, Claus Bull
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Minerals that reversibly fix ions, in particular NO3—, i.e. that can exchange one anion for another anion can be used as fertilizers and soil conditioners, as well as for the purification and treatment of water, particularly for the elimination of nitrate. The minerals used are preferably natural or synthetic mixed value metal-metal-hydroxyl salts, e.g. layered double hydroxides (LDHs) that contain exchangeable fixed anions in the intermediary layers. A method for producing anion-exchanging minerals, particularly suitable LDHs, and their use as fertilizers and soil conditioners and for the purification and treatment of water.
A method of applying Layered Double Hydroxides (LDHs) that reversibly exchange nitrate as fertilizer and soil conditioner for the uniform supplying of arable land with nitrogen in the form of nitrate, wherein the LDHs contain anions exchangeably bound in the intermediate layer and are represented by the following formula:
A method of nitrate removal in purification of water, comprising exchanging anions from layered double hydroxides (LDHS) with nitrate in the water, wherein LDHs contain anions exchangeably bound in intermediate layers, and are represented by the following formula:
Dependencies are inferred from the claim text.