Solid herbicidal concentrate compositions

Patent metadata

Field	Value
Publication number	US-11129388-B2
Application number	US-201716324440-A
Country	US
Kind code	B2
Filing date	Aug 9, 2017
Priority date	Aug 9, 2016
Publication date	Sep 28, 2021
Grant date	Sep 28, 2021

Abstract

The present invention generally relates to solid herbicidal concentrate compositions comprising one or more herbicide salts, particularly salts of acidic herbicides such as glyphosate salts, glufosinate salts, and/or various auxin herbicide salts. The present invention further relates to various processes for preparing the solid herbicidal concentrate compositions as well as methods of using the solid herbicidal concentrate compositions to prepare herbicidal application mixtures.

First claim

What is claimed is:

1. A solid herbicidal concentrate composition comprising a glyphosate salt component and a monocarboxylic acid salt,
wherein the glyphosate salt component comprises glyphosate anions and a monovalent salt-forming cation,
wherein the molar ratio of the monovalent salt-forming cation to total glyphosate anions is from about 1.2:1 to about 1.75:1, and the glyphosate salt component concentration on an acid equivalent basis is at least about 20 wt. %, and
wherein the monocarboxylic acid salt has the formula R 1 —C(O)OM, wherein R 1 is substituted or unsubstituted C 1 -C 5 alkyl or substituted or unsubstituted C 2 -C 5 alkenyl and M is an agriculturally acceptable cation.

2. The solid herbicidal concentrate composition of claim 1 wherein the molar ratio of the monovalent salt-forming cation to total glyphosate anions is from about 1.25:1 to about 1.6:1.

3. The solid herbicidal concentrate composition of claim 1 wherein the monovalent salt-forming cation of the glyphosate salt component is selected from the group consisting of potassium, sodium, ammonium, isopropylammonium, monoethanolammonium, diethanolammonium, triethanolammonium, dimethylammonium, and mixtures thereof.

4. The solid herbicidal concentrate composition of claim 1 wherein the monovalent salt-forming cation of the glyphosate salt component consists essentially of potassium.

5. The solid herbicidal concentrate composition of claim 1 wherein the composition contains no more than about 1 wt. % of ammonium and/or diammonium glyphosate salts.

6. The solid herbicidal concentrate composition of claim 1 wherein the glyphosate salt component concentration on an acid equivalent basis is from about 20 wt. % to about 80 wt. %.

7. The solid herbicidal concentrate composition of claim 1 wherein M is an alkali metal cation selected from the group consisting of sodium, potassium, and mixtures thereof.

8. The solid herbicidal concentrate composition of claim 1 wherein the monocarboxylic acid salt comprises a salt-forming cation that is the same as the monovalent salt-forming cation of the glyphosate salt component.

9. The solid herbicidal concentrate composition of claim 7 wherein the monocarboxylic acid salt comprises a salt of an acid selected from the group consisting of formic acid, acetic acid, propionic acid, and mixtures thereof.

10. The solid herbicidal concentrate composition of claim 1 wherein the monocarboxylic acid salt comprises sodium acetate and/or potassium acetate.

11. The solid herbicidal concentrate composition of claim 1 , wherein the concentration of the monocarboxylic acid salt is from about 0.25 wt. % to about 10 wt. % and further comprises an auxin herbicide salt component wherein the auxin herbicide salt component comprises a salt of one or more auxin herbicides selected from the group consisting of 3,6-dichloro-2-methoxybenzoic acid (dicamba); 2,4-dichlorophenoxyacetic acid (2,4-D); 4-(2,4-dichlorophenoxy)butyric acid (2,4-DB); dichloroprop; 2-methyl-4-chlorophenoxyvacetic acid (MCPA); 4-(4-chloro-2-methylphenoxy)butanoic acid (MCPB); 4-chlorophenoxyacetic acid; 2,4,5-trichlorophenoxyacetic acid (2,4,5-T); mecoprop; and mixtures thereof.

12. The solid herbicidal concentrate composition of claim 11 wherein the auxin herbicide salt component comprises a dicamba salt.

13. The solid herbicidal concentrate composition of claim 12 wherein the dicamba salt is selected from the group consisting of the sodium salt of dicamba, the potassium salt of dicamba, the monoethanolamine salt of dicamba, the diglycolamine salt of dicamba, the dimethylamine salt of dicamba, and combinations thereof.

14. The solid herbicidal concentrate composition of claim 11 wherein the auxin herbicide salt component concentration on an acid equivalent basis is from about 10 wt. % to about 60 wt. %.

15. The solid herbicidal concentrate composition of claim 11 wherein the weight ratio of the glyphosate salt component to the auxin herbicide salt component on an acid equivalent basis is from about 5:1 to about 1:10.

16. The solid herbicidal concentrate composition of claim 1 , further comprising an additive comprising sulfate ions and/or sulfite ions.

17. A solid herbicidal concentrate composition comprising:
an auxin herbicide salt component comprising an auxin herbicide selected from the group consisting of 3,6-dichloro-2-methoxybenzoic acid (dicamba); 2,4-dichlorophenoxyacetic acid (2,4-D); 4-(2,4-dichlorophenoxy)butyric acid (2,4-DB);
dichloroprop; 2-methyl-4-chlorophenoxyacetic acid (MCPA); 4-(4-chloro-2-methylphenoxy)butanoic acid (MCPB); 4-chlorophenoxyacetic acid; 2,4,5-trichlorophenoxyacetic acid (2,4,5-T); mecoprop; and mixtures thereof,
a co-herbicide salt component comprising glyphosate or glufosinate, and
a monocarboxylic acid salt, wherein the monocarboxvlic acid salt has the formula R 1 —C(O)OM, wherein R 1 is substituted or unsubstituted C 1 -C 5 alkyl or substituted or unsubstituted C 2 -C 5 alkenyl and M is an agriculturally acceptable cation,
wherein the co-herbicide salt component comprises one or more acidic co-herbicides comprising a first and a second ionizable acid groups and a monovalent salt-forming cation,
wherein the molar ratio of the monovalent salt-forming cation to the first ionizable acid group is at least about 1.1:1, and
wherein the auxin herbicide salt component concentration on an acid equivalent basis is at least about 10 wt. %.

18. A process for preparing a solid herbicidal concentrate composition of claim 17 , the process comprising:
mixing a co-herbicide acid, a base, and water to form a reaction mass comprising the co-herbicide salt, wherein the co-herbicide acid comprises a first and a second ionizable acid groups, the base comprises the monovalent salt-forming cation, and the molar ratio of the monovalent salt-forming cation to the first ionizable acid group is at least about 1.1:1;
reducing the water content of the reaction mass to produce a herbicidal paste;
mixing the monocarboxylic acid salt and the auxin herbicide salt with the herbicidal paste;
forming the herbicidal paste comprising the co-herbicide salt, monocarboxylic acid salt and auxin herbicide salt to form herbicidal granules; and
drying the herbicidal granules to produce the solid herbicidal concentrate composition.

19. A method of preparing an aqueous herbicidal mixture, the method comprising mixing the solid herbicidal concentrate composition of claim 1 with water.

20. A method of preparing an aqueous herbicidal mixture, the method comprising mixing the solid herbicidal concentrate composition of claim 1 with an auxin herbicide salt and water.

21. A process for preparing a solid herbicidal concentrate composition of claim 1 , the process comprising:
mixing glyphosate acid, a base, and water to form a reaction mass, wherein the base comprises a monovalent salt-forming cation and the molar ratio of the monovalent salt-forming cation to glyphosate acid in the reaction mass is from about 1.2 to about 1.75,
reducing the water content of the reaction mass to produce a herbicidal paste;
mixing the monocarboxylic acid salt with the herbicidal paste;
forming the herbicidal paste comprising the glyphosate salt and monocarboxylic acid salt to form herbicidal granules; and
drying the herbicidal granules to produce the solid herbicidal concentrate composition.

22. A process for preparing a solid herbicidal concentrate composition of claim 11 , the process comprising:
mixing glyphosate acid, an a

Assignees

• Monsanto Technology Llc

Inventors

• Dyszlewski Andrew D
• Friedman Todd C
• Lee Phillip K
• Macinnes Alison

Classifications

• A01N31/00

  Biocides, pest repellants or attractants, or plant growth regulators containing organic oxygen or sulfur compounds · CPC title

• A01N25/00

  Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application {, e.g. seed treatment or sequential application}; Substances for reducing the noxious effect of the active ingredients to organisms other than pests · CPC title

• A01N57/20 Primary

  containing acyclic or cycloaliphatic radicals · CPC title

• A01N37/40

  having at least one carboxylic group or a thio analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system · CPC title

• A01N25/22

  containing ingredients stabilising the active ingredients · CPC title