Stabilized DCD and/or alkyl thiophosphoric triamide solvent systems and use in agricultural applications

Patent metadata

Field	Value
Publication number	US-11795119-B2
Application number	US-202117199516-A
Country	US
Kind code	B2
Filing date	Mar 12, 2021
Priority date	Jun 29, 2016
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

An inhibitor composition contains alkyl thiophosphoric triamide (or a mixture of alkyl thiophosphoric triamide and dicyandiamide), dissolved in a liquid medium comprising at least one organic solvent, at least one amine stabilizer and, optionally, at least one dye and/or at least one odor masking agent, is useful in making fertilizer compositions and in a method of fertilizing target plants.

First claim

What is claimed is:

1. A stable liquid agricultural composition comprising
N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor and dicyandiamide, wherein the NBPT and dicyandiamide are present at 5-75 wt. % of the composition;
dimethyl sulfoxide;
an odor masking agent comprising at least one of terpineol, 4-allylanisole, limonene4-(2,6,6-Trimethyl-2-cyclohexenyl)-3-buten-2-one, isoamyl butyrate, benzaldehyde, diethyl malonate, cyclohexyl acetate, mint, oil Japanese cherry, or α-Ionone,
and
an amine stabilizer selected from the group consisting of 2-amino-2-methyl-1-propanol, amino-2-propanol, 2-amino-1-butanol and mixtures thereof,
wherein the amine stabilizer is present in an amount of from 1 wt % to about 15 wt %, by total weight of the composition, and
wherein there is an absence of each and every compound according to formula (I.a):

wherein R 1 , R 2 and R 3 , are each independently chosen from H, a C 1 -C 16 alkyl group, a C 1 -C 16 alkenyl, group, a C 1 -C 16 alkoxyalkyl group, a C 7 -C 30 alkylarylalkyl group, a C 7 -C 30 arylalkyl group, or an aryl group, provided that at least one of R 1 , R 2 and R 3 is not H.

2. The liquid agricultural composition of claim 1 , wherein at least 38 wt. % of the composition is dimethyl sulfoxide and the amine stabilizer is present in an amount of from 1 wt % to about 10 wt %, by weight of composition.

3. The liquid agricultural composition of claim 2 , wherein 38 to 49 wt. % of the composition is dimethyl sulfoxide.

4. The liquid agricultural composition of claim 3 , wherein the amine stabilizer is 2-amino-2-methyl-1-propanol, amino-2-propanol, or mixtures thereof.

5. The liquid agricultural composition of claim 4 , wherein the amine stabilizer is present in an amount of from 1 to 5 wt. % by total weight of the liquid agricultural composition.

6. The liquid agricultural composition of claim 1 wherein the amine stabilizer is 2-amino-2-methyl-1-propanol, amino-2-propanol, or mixtures thereof.

7. The liquid agricultural composition of claim 1 , further comprising at least one dye.

8. A method of making a solid or concentrated liquid fertilizer composition comprising contacting one or more nitrogenous fertilizer compounds with a liquid agricultural composition of claim 1 .

9. A stable liquid agricultural composition comprising:
N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor and dicyandiamide, wherein the NBPT and dicyandiamide are present at 5-75 wt. % of the composition;
dimethyl sulfoxide;
an amine stabilizer selected from the group consisting of 2-amino-2-methyl-1-propanol, amino-2-propanol, 2-amino-1-butanol and mixtures thereof,
wherein the amine stabilizer is present in an amount of from 1 to 15 wt. %, by total weight of the composition;

optionally, at least one co-solvent selected from the group consisting of:
(a) at least one dioxolane compound of formula (II.b):

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 compound of formula (III):
R 3 OOC-A-CONR 4 R 5   (III),

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 12 alkyl group; and
c) a glycol or glycol derivative; and
an odor masking agent comprising at least one of terpineol, 4-allylanisole, limonene4-(2,6,6-Trimethyl-2-cyclohexenyl)-3-buten-2-one, isoamyl butyrate, benzaldehyde, diethyl malonate, cyclohexyl acetate, mint, oil Japanese cherry, or α-Ionone,
wherein there is an absence of each and every compound according to formula (I.a):

wherein R 1 , R 2 and R 3 , are each independently chosen from H, a C 1 -C 16 alkyl group, a C 1 -C 16 alkenyl, group, a C 1 -C 16 alkoxyalkyl group, a C 7 -C 30 alkylarylalkyl group, a C 7 -C 30 arylalkyl group, or an aryl group, provided that at least one of R 1 , R 2 and R 3 is not H.

10. The liquid agricultural composition of claim 9 , wherein the N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor and dicyandiamide is present in an amount between 14 and 55 wt %, by total weight of composition.

11. The liquid agricultural composition of claim 10 , wherein 38 to 49 wt. % of the composition is dimethylsulfoxide.

12. The liquid agricultural composition of claim 9 , wherein the composition contains 10 to 75% total urease inhibitor and nitrification inhibitor.

13. The liquid agricultural composition of claim 9 wherein the amine stabilizer is 2-amino-2-methyl-1-propanol, amino-2-propanol or mixtures thereof present in an amount of from 1 wt % to about 5 wt %, by weight of composition.

14. The liquid agricultural composition of claim 9 , wherein the amine stabilizer is present in an amount of from 1 to 5 wt. % by total weight of the liquid agricultural composition.

15. A stable liquid agricultural composition consisting of:
N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor and dicyandiamide, wherein the NBPT and dicyandiamide are present at 5-75 wt. % of the composition;
dimethyl sulfoxide, wherein at least 38 wt. % of the composition is dimethyl sulfoxide;
an amine stabilizer selected from the group consisting of 2-amino-2-methyl-1-propanol, amino-2-propanol, 2-amino-1-butanol and mixtures thereof, wherein the amine stabilizer is present in an amount of from 1 wt % to 15 wt %, by weight of composition;
optionally, at least one co-solvent selected from the group consisting of:
(a) at least one dioxolane compound of formula (II.b):

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

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 one or more selected from the group consisting of a linear and a branched divalent C 2 -C 12 alkyl group; and
c) one or more selected from the group consisting of a glycol, and glycol derivative; and

optionally, at least one dye;
at least one odor masking agent selected from the group consisting of terpineol, 4-allylanisole, limonene4-(2,6,6-Trimethyl-2-cyclohexenyl)-3-buten-2-one, isoamyl butyrate, benzaldehyde, diethyl malonate, cyclohexyl acetate, mint, oil Japanese cherry, and α-Ionone.

Assignees

• Rhodia Operations

Inventors

• Liu Hong
• Wu Jiamin
• Gomes Andre
• Shanmuga Krish
• Chen Zhiyun

Classifications

• C05C9/00 Primary

  Fertilisers containing urea or urea compounds · CPC title

• C05B7/00

  Fertilisers based essentially on alkali or ammonium orthophosphates (C05B11/00 takes precedence) · CPC title

• C05C1/00

  Ammonium nitrate fertilisers · CPC title

• C05C9/02

  containing urea-formaldehyde condensates · CPC title

• C05C11/00

  Other nitrogenous fertilisers · CPC title