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US 10,752,559 B2Granted
Urea-containing fertilizers and process for production thereof
Assigneesthyssenkrupp Fertilizer Technology GmbH, thyssenkrupp AG
InventorsMatthias Potthoff, Thomas Krawczyk, Harald Franzrahe, Luc Albert Vanmarcke
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Abstract
A particulate, urea-containing composition and use of an additive for producing a particulate, urea-containing composition and methods of producing a particulate, urea-containing composition.
Claims18
A particulate composition comprising:
- (i) urea;
- and an additive comprising component (ii) and at least one of components (iii) or (vii):
- (ii) a combination of polyethyleneimine and polyvinyl alcohol, or a combination of polyethyleneimine and polyvinylamine;
- (iii) at least one aliphatic C2-C8 dialdehyde;
- (vii) at least one compound selected from the group consisting of aliphatic dicarboxylic 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,
- and an adjuvant comprising at least one of components (iv) or (v):
- (iv) sulfur;
- (v) ammonium sulfate;
- wherein the weight fraction of component (i) is greater than 50 wt % and the weight fraction of the sum of components (ii), (iii) and (vii) in the composition is less than 1 wt % and the weight fraction of the sum of components (iv) and (v) in the composition is less than 50 wt % and the weight ratio of components (ii) and (iii) or the weight ratio of components (ii) and (vii) is in the range from 1:20 to 20:1.
6 more elements
A method for producing a particulate composition comprising urea, comprising the steps of:
- providing a urea-containing solution;
- and
- granulating or prilling the urea-containing solution with addition of at least one of:
- an additive comprising component (ii), or
- at least one of components (iii) or (vii):
- (ii) a combination of polyethyleneimine and polyvinyl alcohol, or a combination of polyethyleneimine and polyvinylamine;
- (iii) at least one aliphatic C2-C8 dialdehyde;
- (vii) at least one compound selected from the group consisting of aliphatic dicarboxylic 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,
- and an adjuvant comprising at least one of components (iv) or (v):
- (iv) sulfur;
- (v) ammonium sulfate.
8 more elements
A fertilizer comprising:
- a particulate urea composition comprising:
- (i) urea;
- and an additive comprising component (ii) and at least one of components (iii) or (vii):
- (ii) a combination of polyethyleneimine and polyvinyl alcohol, or a combination of polyethyleneimine and polyvinylamine;
- (iii) at least one aliphatic C2-C8 dialdehyde;
- (vii) at least one compound selected from the group consisting of aliphatic dicarboxylic 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,
- and an adjuvant comprising at least one of components (iv) or (v):
- (iv) sulfur;
- (v) ammonium sulfate;
- wherein the weight fraction of component (i) is greater than 50 wt % and the weight fraction of the sum of components (ii), (iii) and (vii) in the composition is less than 1 wt % and the weight fraction of the sum of components (iv) and (v) in the composition is less than 50 wt % and the weight ratio of components (ii) and (iii) or the weight ratio of components (ii) and (vii) is in the range from 1:20 to 20:1.
7 more elements
Dependencies are inferred from the claim text.