Patent · US Active

Substrate for soil improvement having a water-storing property, method for producing same, and use thereof

US9528046B2 · kind B2 · utility

0Cited by

29References

5Claims

0Family size

Assignee

Technische Universitaet Dresden · DE

Inventors

Lars Passauer · Dresden, DE
Falk Liebner · Fürstenwalde/Spree, DE
Klaus Fischer · Speyer, DE
Joachim Katzur

Key dates

Filing date	Jan 14, 2015
Grant date	Dec 27, 2016
Priority date	—
Expiry date	Jan 14, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K17/16
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.