Solvent composition for a urease inhibitor, application and use thereof

1 . A solvent composition, the solvent composition comprising:

(A) an alkyl glycol ester-type solvent of the formula (I)

wherein

R is hydrogen or a linear or branched C1 to C5 alkyl group,

R2 is hydrogen or a methyl group,

R3 is hydrogen or a methyl group,

X is from 1 to 4,

R6 is a linear or branched C1 to C6 alkyl group,

wherein R2 and R3 may be different for each X, and wherein X is the alkoxylation degree and a number average; and

(B) a glycol-type solvent of the formula (II)

wherein

R4 is hydrogen or a C1 to C3 alkyl group,

R5 is hydrogen or a C1 to C3 alkyl group, and

Z is an integer from 0 to 4;

and wherein the glycol-type solvent of the formula (II) and the alkyl glycol ester-type solvent of the formula (I) are in a mass ratio in the range of from 3:1 to 9:1.

2 . The solvent composition of claim 1 , wherein

(A) the alkyl glycol ester-type solvent of the formula (I) and

(B) the glycol-type solvent of the formula (II) together form greater than 70 wt % of the solvent composition.

3 . The solvent composition of claim 1 , wherein independent from each other

a) R is a C1 to C4 alkyl group; and

b) R6 is a linear or branched C1 to C4 alkyl group.

4 . The solvent composition of claim 1 , wherein R2 and R3 are selected such that the alkylene glycol group (AG)

represents an ethylene oxide (EO) unit or a propylene oxide (PO) unit or both.

5 . The solvent composition of claim 1 , wherein independent from each other

a) R4 is hydrogen or a C1 to C2 alkyl group;

b) R5 is hydrogen or a C1 to C2 alkyl group; and

c) Z is an integer from 0 to 3.

6 . The solvent composition of claim 1 , wherein the solvent composition does not comprise N-methyl-2-pyrrolidone.

7 . The solvent composition of claim 1 , wherein;

a) R is a methyl group,

b) R2 is hydrogen,

c) R3 is hydrogen,

d) X is from 1 to 2.2,

e) R4 is a methyl group and R5 is hydrogen, or R4 is hydrogen and R5 is a methyl group,

f) R6 is n-butyl, and

g) Z is 0.

8 . A non-aqueous solvent delivery formulation comprising:

the solvent composition claim 1 ; and

a urease inhibitor dissolved in the solvent composition,

wherein the concentration of the urease inhibitor in the non-aqueous solvent delivery formulation is up to 40 wt % based on the total mass of the non-aqueous solvent delivery formulation.

9 . The non-aqueous solvent delivery formulation of claim 8 , wherein the urease inhibitor comprises or consists of an N-alkyl thiophosphoric triamide.

10 . The non-aqueous solvent delivery formulation of claim 8 wherein the concentration of the solvent composition is at least 50 wt. % based on the total mass of the non-aqueous solvent delivery formulation.

11 . The non-aqueous solvent delivery formulation of claim 8 , wherein the non-aqueous solvent delivery formulation further comprises one or more nitrification inhibitors.

12 . The non-aqueous solvent delivery formulation of claim 8 , wherein the non-aqueous solvent delivery formulation further comprises one or more pesticide actives.

13 . The non-aqueous solvent delivery of formulation claim 8 , wherein the non-aqueous solvent delivery formulation further comprises additives.

14 . A fertiliser comprising at least

a urea-based component and

the non-aqueous solvent delivery formulation of claim 8 .

15 . The fertiliser of claim 14 , wherein the fertiliser is a solid fertiliser.

16 . A method for obtaining a fertiliser, the method comprising:

providing a urea component; and

treating the urea component with the non-aqueous solvent delivery formulation of claim 8 to produce a fertilizer.

17 . The solvent composition of claim 1 , wherein

(A) the alkyl glycol ester-type solvent of the formula (I) and

(B) the glycol-type solvent of the formula (II)

together form greater than 90 wt % of the solvent composition.

18 . The solvent composition of claim 1 , wherein

(A) the alkyl glycol ester-type solvent of the formula (I) and

(B) the glycol-type solvent of the formula (II)

together form greater than 95 wt % of the solvent composition.

19 . The solvent composition of claim 1 , wherein the solvent composition exclusively consists of (A) and (B).

20 . The non-aqueous solvent delivery formulation of claim 11 , wherein said nitrification inhibitors comprise dicyandiamide, nitrapyrin, pronitridine, allylthiourea, 3,4-dimethylpyrazole phosphate, or mixtures thereof.

21 . The non-aqueous solvent delivery formulation of claim 12 , wherein said pesticide actives comprise herbicides, fungicides, insecticides, or mixtures thereof.

22 . The non-aqueous solvent delivery formulation of claim 13 , wherein said additives comprise micronutrients, biostimulants, plant growth regulators, or mixtures thereof.