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

Patent metadata

Field	Value
Publication number	US-10654760-B2
Application number	US-201816207755-A
Country	US
Kind code	B2
Filing date	Dec 3, 2018
Priority date	Oct 21, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

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 consisting of:
a urease inhibitor comprising N-butyl thiophosphoric triamide, wherein the N-(n-butyl)-thiophosphoric triamide is 30 to 60 wt %, by total weight of the composition;
an organophosphate solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each independently chosen from C 1 -C 4 alkyl group,

dimethylsulfoxide;
optionally, dicyandiamide;
optionally, water;
optionally, a dye; and
optionally, at least one organic co-solvent selected from:
at least one dibasic ester;
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;
at least one alkyldimethylamide;
ethyl levulinate;
at least one alkylene carbonate; or
any combination thereof
wherein for 100 parts by weight total N-butyl thiophosphoric triamide, organophosphate solvent, and dimethylsulfoxide there is greater than 40 up to 60 parts N-butyl thiophosphoric triamide.

2. The liquid agricultural composition of claim 1 , wherein the dicyandiamide is present.

3. The liquid agricultural composition of claim 1 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide;
optionally the water; and
optionally, the dye.

4. The liquid agricultural composition of claim 1 , wherein the organophosphate solvent is of formula (VIII):

wherein R 1 , R 2 and R 3 , are each independently chosen from C 2 -C 4 alkyl group,
wherein the dimethylsulfoxide is present in an amount of at least 39.7 wt %, by total weight of the composition, wherein the N-butyl thiophosphoric triamide is greater than 45 and up to 55 wt % by total weight of the composition.

5. The liquid agricultural composition of claim 4 , wherein the N-butyl thiophosphoric triamide is present at greater than 45 and up to 55 wt %, by total weight of the composition.

6. The liquid agricultural composition of claim 1 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide;
optionally the co-solvent; and
optionally, the dye.

7. The liquid agricultural composition of claim 1 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide; and
optionally, the dye.

8. A method of making a solid or concentrated liquid fertilizer composition comprising treating one or more nitrogenous fertilizer compounds with a liquid inhibitor composition consisting of:
N-(n-butyl)-thiophosphoric triamide dispersed in a liquid medium,
wherein the N-(n-butyl)-thiophosphoric triamide is 30 to 60 wt %, by total weight of the liquid inhibitor composition,
the liquid medium consisting of:
at least one organophosphate solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each independently chosen from a C 2 -C 4 alkyl group,
dimethylsulfoxide,
optionally, dicyandiamide;
optionally, water;
optionally, a dye; and
optionally a co-solvent selected from:
at least one dibasic ester selected from the group consisting of di(C 1 -C 12 )alkyl esters of saturated linear or branched (C 2 -C 8 )aliphatic dicarboxylic acids or mixtures thereof;
at least one compound of formula (IIa):
R 3 OOC-A-CONR 4 R 6   (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;
at least one alkyldimethylamide;
ethyl levulinate;
at least one alkylene carbonate;
wherein for 100 parts by weight total N-butyl thiophosphoric triamide, organophosphate solvent and dimethylsulfoxide there is greater than 40 up to 60 parts N-butyl thiophosphoric triamide.

9. The method of claim 8 ,
wherein N-butyl thiophosphoric triamide is present at greater than 45 and up to 55 wt %, by total weight of the composition, wherein the dimethylsulfoxide is present in an amount of at least 39.7 wt %, by total weight of the liquid inhibitor composition.

10. The method of claim 9 , wherein N-butyl thiophosphoric triamide is present at greater than 45 and up to 55 wt %, by total weight of the composition.

11. The method of claim 8 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide;
optionally the co-solvent; and
optionally, the dye.

12. The method of claim 8 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide;
optionally the water; and
optionally, the dye.

13. The method of claim 8 , wherein the liquid inhibitor composition consists of:
the N-(n-butyl)-thiophosphoric triamide;
the at least one organophosphate solvent;
the dimethylsulfoxide;
optionally, the dicyandiamide; and
optionally, the dye.

14. 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 liquid inhibitor composition that consists of N-(n-butyl)-thiophosphoric triamide dispersed in a liquid medium,
the liquid medium consists of:
at least one organophosphate solvent of formula (VIII):

wherein R 1 , R 2 and R 3 , are each independently chosen from a C 1 -C 4 alkyl group,
and

(d) dimethylsulfoxide, and
optionally, at least one co-solvent selected from:
at least one dibasic ester selected from the group consisting of di(C 1 -C 12 )alkyl esters of saturated linear or branched (C2-C8)aliphatic dicarboxylic acids and mixtures thereof;
at least one compound of formula (IIa):
R 3 OOC-A-CONR 4 R 6   (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;
at least one alkyldimethylamide;
ethyl levulinate; or
at least one alkylene carbonate;

optionally fertilizer, wherein at least one said fertilizer is a nitrogenous fertilizer;
optionally water;
optionally at least one dye; and
wherein the alkyl thiophosphoric triamide is 30 to 60 wt %, by total weight of:
the alkyl thiophosphoric triamide or the mixture compris

Assignees

• Rhodia Operations

Inventors

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

Classifications

• C05C9/00

  Fertilisers containing urea or urea compounds · CPC title

• C09K15/28

  containing nitrogen, oxygen and sulfur · CPC title

• C05G5/20

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

• C05C11/00 Primary

  Other nitrogenous fertilisers · CPC title

• C05G3/90

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