Solvent systems for dicyandiamide and/or alkyl thiophosphoric triamide and use in agricultural applications

Patent metadata

Field	Value
Publication number	US-10196322-B2
Application number	US-201514918941-A
Country	US
Kind code	B2
Filing date	Oct 21, 2015
Priority date	Oct 21, 2014
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

An inhibitor composition contains dicyandiamide as a nitrification inhibitor, alkyl thiophosphoric triamide as a urease inhibitor, or a combination thereof, dissolved in a liquid medium comprising an organic solvent selected from, among others, one or more polar aprotic solvents, including one or more organophosphates, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, is useful in making fertilizer compositions and in a method of fertilizing target plants.

First claim

What is claimed is:

1. A liquid agricultural composition comprising
a urease inhibitor comprising N-butyl thiophosphoric triamide or a mixture comprising the urease inhibitor and a nitrification inhibitor;
an organophosphate solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each a C 2 alkyl group;

dimethylsulfoxide; and
optionally, at least one organic co-solvent selected from:
(a) at least one dioxolane compound of formula (III):

wherein R 6 and R 7 individually comprises a hydrogen, an alkyl group, an alkenyl group, or a phenyl group, wherein n is an integer of from 1 to 10;
b) at least one dibasic ester;
c) at least one compound of formula (IIa):
R 3 OOC-A-CONR 4 R 5   (IIa),

wherein R 3 comprises a C 1 -C 36 alkyl group; wherein R 4 and R 5 individually comprise a C 1 -C 36 alkyl group, wherein R 4 and R 5 can optionally together form a ring; and wherein A is a linear or a branched divalent C 2 -C 6 alkyl group;
d) at least one alkyldimethylamide;
e) at least one alkyl lactate;
f) ethyl levulinate;
g) at least one alkyoxyalcohol, ether alcohol, amine alcohol, amino alcohol or alcohol;
h) at least one glycerine or glycerine derivative; or
i) at least one alkylene carbonate,
wherein the urease inhibitor or the mixture comprising the urease inhibitor and the nitrification inhibitor is 0.5 to 60 wt %, by total weight of the composition.

2. The liquid agricultural composition of claim 1 , wherein the nitrification inhibitor is present and comprises dicyandiamide.

3. The liquid agricultural composition of claim 1 , wherein the at least one co-solvent is present and comprises at least one dioxolane compound of formula (III):

wherein R 6 and R 7 individually comprises a hydrogen, an alkyl group, an alkenyl group, or a phenyl group, wherein n is an integer of from 1 to 10.

4. The liquid agricultural composition of claim 1 , wherein the urease inhibitor is 14 to 60 wt by total weight of the composition, %, wherein the organophosphate solvent comprises triethyl phosphate, wherein for 100 parts by weight total N-butyl thiophosphoric triamide, organophosphate solvent, dimethylsulfoxide and organic co-solvent there is 30 to 60 parts N-butyl thiophosphoric triamide.

5. The liquid agricultural composition of claim 1 , wherein the urease inhibitor or the mixture comprising the urease inhibitor and the nitrification inhibitor is present up to 55 wt %, by total weight of the composition.

6. The liquid agricultural composition of claim 1 , wherein the urease inhibitor or the mixture comprising the urease inhibitor and the nitrification inhibitor is present at greater than 45 and up to 55 wt %, by total weight of the composition,
wherein the organophosphate solvent comprises triethyl phosphate, wherein for 100 parts by weight total N-butyl thiophosphoric triamide, organophosphate solvent, dimethylsulfoxide and organic co-solvent there is 30 to 55 parts N-butyl thiophosphoric triamide.

7. The composition of claim 1 , wherein triethyl phosphate is the organophosphate solvent, wherein the urease inhibitor is N-butyl thiophosphoric triamide and is 30 to 60 wt %, by total weight of the composition, wherein for 100 parts by weight total N-butyl thiophosphoric triamide, organophosphate solvent and dimethylsulfoxide there is greater than 40 and up to 60 parts N-butyl thiophosphoric triamide.

8. The composition of claim 7 , wherein the urease inhibitor is N-butyl thiophosphoric triamide and is 40 to 55 w t%, by total weight of the composition, wherein for 100 parts by weight total N-butyl thiophosphoric triamide, triethyl phosphate and dimethylsulfoxide there is greater than 45 and up to 55 parts N-butyl thiophosphoric triamide.

9. A method of making a solid or concentrated liquid fertilizer composition comprising treating one or more nitrogenous fertilizer compounds with a liquid inhibitor composition that comprises a urease inhibitor, comprising N-butyl thiophosphoric triamide, dispersed in a liquid medium comprising at least one solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each independently a C 2 alkyl group and
dimethylsulfoxide and optionally a co-solvent, and
optionally a nitrification inhibitor,
wherein the urease inhibitor or a mixture comprising the urease inhibitor and the nitrification inhibitor is 0.5 to 60 wt %, by total weight of the composition.

10. The method of claim 9 , wherein the nitrification inhibitor is present, wherein the nitrification inhibitor comprises dicyandiamide.

11. The method of claim 9 , wherein the liquid inhibitor composition further comprises monoethanolamine as a stabilizer.

12. A concentrated liquid fertilizer composition comprising, based on 100 parts by weight of the composition:
(a) up to about 99 parts by weight of one or more nitrogenous fertilizer compounds,
(b) a urease inhibitor comprising N-butyl thiophosphoric triamide,
(c) organophosphate solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each a C 2 alkyl group, and

(d) dimethylsulfoxide and optionally at least one co-solvent, and
(e) optionally a nitrification inhibitor,
wherein the urease inhibitor or a mixture comprising the urease inhibitor and the nitrification inhibitor is 0.5 to 60 wt %, by total weight of the urease inhibitor, the organophosphate solvent, the dimethylsulfoxide, if present the co-solvent and, if present the nitrification inhibitor.

13. The concentrated liquid fertilizer composition of claim 12 , wherein the nitrification inhibitor is present and comprises dicyandiamide.

14. The concentrated liquid fertilizer composition of claim 12 , wherein the at least one co-solvent is present and comprises at least one member of the group consisting of:
(a) at least one dioxolane compound of formula (III):

wherein R 6 and R 7 individually comprises a hydrogen, an alkyl group, an alkenyl group, or a phenyl group, wherein n is an integer of from 1 to 10;
b) at least one dibasic ester;
c) at least one compound of formula (IIa):
R 3 OOC-A-CONR 4 R 5   (IIa),

wherein R 3 comprises a C 1 -C 36 alkyl group; wherein R 4 and R 5 individually comprise a C 1 -C 36 alkyl group, wherein R 4 and R 5 can optionally together form a ring; and wherein A is a linear or a branched divalent C 2 -C 6 alkyl group;
d) at least one alkyldimethylamide;
e) at least one alkyl lactate;
f) ethyl levulinate;
g) at least one alkyoxyalcohol, ether alcohol, amine alcohol, amino alcohol or alcohol;
h) at least one glycerine or glycerine derivative;
i) at least one alkylene carbonate; and
k) any combination thereof.

15. A method of making an aqueous end use fertilizer composition compr

Assignees

• Rhodia Operations

Inventors

• Mcknight Michelle
• Vielliard Antoine
• Ortiz-Suarez Marivi
• Armisen Samantha
• Moreau Chloe

Classifications

• C05G5/20

  Liquid fertilisers (layered or coated C05G5/30; incorporated into a matrix C05G5/40) · CPC title

• C05G3/90

  for affecting the nitrification of ammonium compounds or urea in the soil · CPC title

• C05C11/00 Primary

  Other nitrogenous fertilisers · CPC title

• C09K15/28

  containing nitrogen, oxygen and sulfur · CPC title

• C05C9/00

  Fertilisers containing urea or urea compounds · CPC title