Substrate for soil improvement having a water-storing property, method for producing same, and use thereof
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jun 25, 2015
app pub date -
Jan 14, 2015
filing date -
Feb 10, 2010
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Abstract
In a method for producing a substrate for soil improvement with water-storing property on the basis of lignin, lignin is provided and oxidized alternatively in an aqueous alkaline or a pH-neutral aqueous suspension, wherein the pH-neutral aqueous suspension after oxidation of the lignin is converted into an alkaline medium. The lignin is cross-linked in an aqueous alkaline medium by multi-functional compounds. Subsequently, the lignin is neutralized, dried, and comminuted. The produced lignin is used as a substrate for improvement of soil properties in that the substrate is used as a water storage that, compared to water storages of non-modified technical lignins, exhibits a significantly higher water adsorption capacity or swelling capacity.
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