Method for producing fertilizer from a biopolymer, and fertilizer
AssigneeS2P AG Straw - Pulp & Paper
InventorKarl-Heinz HORNLEIN
Life of this patent
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Abstract
The invention relates to a method for producing a nitrogen-containing fertilizer from a liquid black liquor, wherein a black liquor is formed from lignocellulose-containing biomass. A majority of contained lignin constituents are decomposed into monomeric, dimeric to trimeric compounds, and at least one free alkanolamine, in particular monoethanolamine, is removed from the liquid black liquor. The black liquor is cooled to room temperature and combined with water, a defined flowable state of the black liquor being set. The flowable black liquor is supplied to a mixing device and combined with powder solids so as to form a pasty mixture which is formed into granules.
Claims14
Method for producing a nitrogenous fertilizer, in which
- a black liquor is formed of lignocellulose-containing biomass, wherein contained lignin constituents are broken down to a major part into monomeric, dimeric to trimeric compounds,
- from the liquid black liquor at least free alkanolamine is removed as a noxious substance, wherein bonded alkanolamine remains in the black liquor,
- the black liquor with the bonded alkanolamine is cooled to room temperature and mixed with water, wherein a defined flowable state of the black liquor is set,
- the flowable black liquor is supplied to a mixing device and mixed with powdery solids, which comprise organic and/or inorganic fertilizer components, into a pasty fertilizer mixture and
- the pasty fertilizer mixture is shaped into fertilizer granules.
Dependencies are inferred from the claim text.