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US 10,106,469 B2Granted
Urea composition and method for producing same
AssigneesUhde Fertilizer Technology B.V., thyssenkrupp AG
InventorsThomas Krawczyk, Matthias Potthoff, Luc Vanmarcke, Erik Alexander Bijpost, Alexander Maslow
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Abstract
Disclosed is a particulate, urea-containing composition, to a method and apparatus for producing it, to the use thereof as fertilizer, as technical urea or as feed additive, and to the use of an additive for producing a particulate, urea-containing composition.
Claims13
A particulate composition comprising
- (i) urea;
- and an additive comprising component (ii) and at least one of components (iii) and (iv):
- (ii) a combination of polyethylenimine and polyvinyl alcohol or a combination of polyethylenimine and polyvinylamine;
- (iii) at least one aliphatic C2-C8 dialdehyde;
- and
- (iv) at least one compound selected from the group of aliphatic dixcarboxylic acids, their salts and anhydrides, aliphatic tricarboxylic acids, their salts and anhydrides, aromatic dicarboxylic acids, their salts and anhydrides, and aldehydic acids, their salts and anhydrides;
- where the weight fraction of component (i) is >60 wt % and the weight fraction of the sum of components (ii) and (iii) in the composition is <1 wt %.
4 more elements
Dependencies are inferred from the claim text.