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

Patent metadata

Field	Value
Publication number	US-2019270682-A1
Application number	US-201916415024-A
Country	US
Kind code	A1
Filing date	May 17, 2019
Priority date	Jun 29, 2016
Publication date	Sep 5, 2019
Grant date	—

Abstract

An inhibitor composition contains alkyl thiophosphoric triamide (or a mixture of alkyl thiophosphoric triamide and dicyandiamide),dissolved in a liquid medium including 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

1 . A stable liquid agricultural composition comprising
N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor, wherein between 40 and 55 wt. % of the composition is N-(n-butyl)-thiophosphoric triamide (NBPT); dimethyl sulfoxide; 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 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 DMSO and the amine stabilizer is 2-amino-2-methyl-1-propanol, 2 amino-1-butanol or mixtures thereof.

3 . The liquid agricultural composition of claim 1 , wherein the amine stabilizer is present in an amount of from 1 wt % to about 10 wt %, by weight of composition.

4 . The liquid agricultural composition of claim 1 , wherein between 45 and 55 wt. % of the composition is the N-(n-butyl)-thiophosphoric triamide (NBPT) and 38 to 44 wt. % of the composition is dimethyl sulfoxide.

5 . The liquid agricultural composition of claim 1 , further comprising at least one nitrification inhibitor.

6 . The liquid agricultural composition of claim 5 , wherein the nitrification inhibitor is dicyandiamide (DCD).

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

8 . The liquid agricultural composition of claim 1 , further comprising 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, anisole, mint, oil Japanese cherry, or α-Ionone.

9 . The liquid agricultural composition of claim 1 , wherein between 45 and 55 wt. % of the composition is the N-(n-butyl)-thiophosphoric triamide (NBPT).

10 . A stable liquid agricultural composition comprising:
N-(n-butyl)-thiophosphoric triamide (NBPT) urease inhibitor, wherein between 40 and 55 wt. % of the composition is N-(n-butyl)-thiophosphoric triamide (NBPT); 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; 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, anisole, 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.

11 . The liquid agricultural composition of claim 10 , optionally further comprising dicyandiamide (DCD) as a nitrification inhibitor, wherein the composition contains 10 to 75% total urease inhibitor and nitrification inhibitor,
wherein between 25 and 55 wt. % of the composition is the at least one urease inhibitor.

12 . The liquid agricultural composition of claim 10 , wherein the amine stabilizer is 2-amino-2-methyl-1-propanol.

13 . The liquid agricultural composition of claim 10 , wherein the amine stabilizer is 2-amino-2-methyl-1-propanol, 2 amino-1-butanol or mixtures thereof.

14 . The liquid agricultural composition of claim 13 , wherein the amine stabilizer is the mixture of 2-amino-2-methyl-1-propanol and 2-amino-1-butanol.

15 . The liquid agricultural composition of claim 10 , wherein the at least one urease inhibitor is present in an amount between 45 and 55 wt %, by total weight of composition.

16 . The liquid agricultural composition of claim 1 , wherein the N-(n-butyl)-thiophosphoric triamide (NBPT) is present in an amount between 45 and 55 wt %, by total weight of composition, and wherein 38 to 44 wt. % of the composition is DMSO.

17 . The liquid agricultural composition of claim 10 , wherein the at least one a urease inhibitor is present in an amount between 50 and 55 wt %, by total weight of composition.

18 . The liquid agricultural composition of claim 1 , wherein the amine stabilizer is present in an amount less than 50% by total weight of the liquid fertilizer composition.

19 . The liquid agricultural composition of claim 1 , wherein the amine stabilizer is present in an amount from 1 to 10% by total weight of the liquid fertilizer composition.

20 . The liquid agricultural composition of claim 1 , wherein the amine stabilizer is present in an amount less than 4% by total weight of the liquid fertilizer composition

21 . The liquid agricultural composition of claim 10 , further comprising at least one nitrification inhibitor.

22 . The liquid agricultural composition of claim 21 , wherein the nitrification inhibitor is dicyandiamide (DCD).

23 . A method of making a solid or concentrated liquid fertilizer composition comprising contacting one or more nitrogenous fertilizer compounds with a liquid inhibitor composition of claim 1 that comprises between 40 and 55 wt. % N-(n-butyl)-thiophosphoric triamide (NBPT) as urease inhibitor, which is dissolved or dispersed in a liquid medium comprising:
dimethyl sulfoxide, wherein at least 38 wt. % of the composition is dimethyl sulfoxide;
and
an amine stabilizer selected from the group consisting of 2-amino-2-methyl-1-propanol, amino-2-propanol, 2-amino-1-butanol or any combination thereof, wherein the amine stabilizer is present in an amount of from 1 wt % to 15 wt %, by weight of composition,
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.

24 . The method of claim 23 , wherein the liquid medium further comprises 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, anisole, mint, oil Japanese cherry, or α-Ionone.

25 . (canceled)

26 . The liquid agricultural composition of claim 24 , wherein the amine stabilizer is selected from the group consisting of 2-amino-2-methyl-1-

Assignees

• Rhodia Operations

Inventors

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

Classifications

• C05G3/90 Primary

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

• C05C9/00 Primary

  Fertilisers containing urea or urea compounds · CPC title

• Y02P60/21

  Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures · CPC title

• C05C11/00

  Other nitrogenous fertilisers · CPC title

• C05B7/00

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