Patent · US Active

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

US8993735B2 · kind B2 · utility

1Cited by

20References

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	Feb 10, 2011
Grant date	Mar 31, 2015
Priority date	—
Expiry date	May 29, 2031

Classification

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

Abstract

The invention relates to a method for producing a lignin-based substrate for soil improvement having a water-storing property, characterized by the following steps: providing lignin, oxidizing the lignin in either an aqueous alkaline suspension or a pH-neutral aqueous suspension, the pH-neutral aqueous suspension being converted into an alkaline substance after the lignin has been oxidized, cross-linking the lignin in an aqueous alkaline medium using multifunctional compounds, and neutralizing, drying, and comminuting the lignin.

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