C - Chemistry – Metallurgy – 05 – F
Patent
C - Chemistry, Metallurgy
05
F
C05F 11/02 (2006.01) C05G 3/00 (2006.01)
Patent
CA 2354423
The invention relates to a method for producing an organic fertilizer having humic properties by oxidation and ammonification of lignite. The method is characterized in that the lignite is suspended in an aqueous-ammoniacal medium with a pH of more than 9 to 12, partially dissolved in the process and oxidized at a temperature of between 20 and 100 ~C at normal pressure. The organic fertilizer is obtained as dispersion in the aqueous medium, by thickening or by drying, so that a C/N ratio of between 9 and 15 is achieved. The invention also relates to an organic fertilizer and its use. The above method makes it possible to produce an organic fertilizer having a humus-like structure and long-term fertilizing action from lignite and to use same as such a fertilizer or as additive in substrates improving crop yield and soil quality.
L'invention concerne un procédé de production d'un engrais organique à caractère de matières humiques par traitement oxydant et d'ammonisation de lignite brun. L'invention est caractérisée en ce que le lignite brun est en suspension dans un milieu aqueux-ammoniacal d'un pH supérieur à 9 à 12 et partiellement dissout et oxydé à une température de 20 à 100 ·C à une pression normale, et en ce que l'engrais organique est extrait comme dispersion dans un milieu aqueux, par concentration ou séchage, ce qui permet d'obtenir un rapport C/N de 9 à 15. L'invention concerne également un engrais organique et son utilisation. Ce procédé permet de produire un engrais organique à partir du lignite brun ayant une structure similaire à l'humus et une action d'engrais longue durée et de l'utiliser tel quel ou en apport à des substrats permettant d'améliorer le rendement et le sol.
Fischer Klaus
Katzur Joachim
Schiene Rainer
Fischer Klaus
Katzur Joachim
Kirby Eades Gale Baker
Schiene Rainer
Technische Universitat Dresden
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