Urease inhibitor formulations
AssigneeIncitec Pivot Limited
InventorsArpad T. Phillip, Roydon Hildebrand, Rohan Davies, Charlie Walker
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Abstract
There is provided a liquid urease inhibitor formulation comprising an urease inhibitor and a primary solvent selected from the group consisting of dialkyl sulfones, polymethylene cyclic sulfones, and mixtures thereof. A method for inhibiting urease hydrolysis of urea containing fertilizer or waste using said liquid urease inhibitor formulation is also described.
Claims23
A liquid urease inhibitor formulation for application to urea-based fertilizers and waste containing urea compounds comprising:
- (a) a urease inhibitor selected from the group consisting of N-substituted thiophosphoric triamides and N-substituted phosphoric triamides represented by Structure I and mixtures thereof,
- wherein X=O or S, R1=unsubstituted and substituted C4-C6 alkyl, unsubstituted and substituted C5-C8 cyclo alkyl, phenyl and substituted phenyl having a nitro, amino, alkyl, or halide substituent;
- and Y=H, NO2, halide, NH2 or C1 to C8 alkyl;
- and
- (b) a primary solvent selected from the group consisting of dialkyl sulfones according to Structure II, polymethylene cyclic sulfones according to Structure III, and mixtures thereof;
- wherein the urease inhibitor is soluble in the primary solvent.
A method for inhibiting the urease hydrolysis of urea-containing fertilizer, soil or waste containing urea compounds, the method comprising the step of applying a liquid urease inhibitor formulation to the urea-containing fertilizer, soil or waste containing urea compounds, the liquid urease inhibitor formulation comprising:
- (a) a urease inhibitor selected from the group consisting of N-substituted thiophosphoric triamides and N-substituted phosphoric triamides represented by Structure I and mixtures thereof,
- wherein X=O or S, R1=unsubstituted and substituted C3-C6 alkyl, unsubstituted and substituted C5-C8 cyclo alkyl, phenyl and substituted phenyl having a nitro, amino, alkyl, or halide substituent;
- and Y=H, NO2, halide, NH2 or C1 to C8 alkyl;
- and
- (b) a primary solvent selected from the group consisting of dialkyl sulfones according to Structure II, polymethylene cyclic sulfones according to Structure III, and mixtures thereof;
- wherein the urease inhibitor is soluble in the primary solvent.
The method of 17, wherein the amount of buffering agent and stabilizer is in the range from 1 to 50% by weight of the total formulation.
A liquid urease inhibitor formulation for application to urea-based fertilizers and waste containing urea compounds comprising:
- (a) a urease inhibitor selected from the group consisting of N-substituted thiophosphoric triamides and N-substituted phosphoric triamides represented by Structure I and mixtures thereof,
- wherein X=O or S, R1=unsubstituted and substituted C3-C6 alkyl, unsubstituted and substituted C5-C8 cyclo alkyl, phenyl and substituted phenyl having a nitro, amino, alkyl, or halide substituent;
- and Y=H, NO2, halide, NH2 or C1 to C8 alkyl;
- (b) a primary solvent selected from the group consisting of dialkyl sulfones according to Structure II, polymethylene cyclic sulfones according to Structure III, and mixtures thereof;
- wherein the urease inhibitor is soluble in the primary solvent;
- and
- (c) a buffering agent and stabilizer selected from the group consisting of hydroxyethyl and hydroxypropyl amines according to Structure IV, in which the amine can be a primary, secondary or tertiary amine and the number of hydroxyethyl or hydroxypropyl groups can be 1, 2 or 3,
Dependencies are inferred from the claim text.