Patent · US Active

Invention relates to a method for producing an organic fertilizer with humic properties

US11319258B2 · kind B2 · utility

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1References

18Claims

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Assignee

Novihum Technologies GmbH · DE

Inventors

Horst NINNEMANN · Dortmund, DE
Reinhard SORGE · Bitterfeld-Wolfen, DE
Peter Langer · Hasbergen, DE

Key dates

Filing date	Apr 27, 2017
Grant date	May 3, 2022
Priority date	—
Expiry date	Dec 11, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC05G3/00
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a method for producing an organic fertilizer with humic substance properties by oxidizing and ammonifying lignite, wherein the organic fertilizer has a nitrogen content of up to 8 wt. %, based on the dry weight of the fertilizer, and a C/N ratio of 7 to 15, which is characterized in that the method is carried out as a continuous method and comprises the following steps: a) dispersing the lignite and aqueous ammonia solution in a dispersing circuit having a dispersing device, a recirculation container, and a recirculation pump; b) oxidizing the suspension from step a) with an oxygen-containing oxidizing agent at a temperature of <100° C. in an oxidation reactor; c) drying the product suspension obtained in step b) at a temperature of >50° C.; and d) cooling the dried product obtained in step c).

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