Method for preparation of an aqueous glyphosate concentrate composition having mixture of amine salts
AssigneeNufarm Australia Limited
InventorsAllan Spencer, Aristos Panayi, Chad Richard Ord Sayer
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Abstract
A method for preparing a glyphosate herbicidal aqueous concentrate to improve the handling of the concentrate, the method comprising forming a mixture of at least two nitrogen bases, and reacting the mixture of the at least two bases with glyphosate acid to provide an aqueous mixture of glyphosate salts wherein the concentration of glyphosate (based on glyphosate acid equivalent) is at least 200-gae/L.
Claims22
A method for preparing a glyphosate herbicidal aqueous concentrate to improve the handling of the concentrate, the method comprising forming a mixture of at least two nitrogen bases, and reacting the mixture of the at least two bases with glyphosate acid to provide an aqueous mixture of glyphosate salts wherein the concentration of glyphosate (based on glyphosate acid equivalent) is at least 200 gae/L.
A method according to any one of the previous claims wherein the concentrate of glyphosate salts is at least 500 gae/liter (based on acid equivalent) still more preferably more than 550 gae/liter.
A method according to any one of the previous claims wherein the concentration of the glyphosate is at least 600 gae per liter (still more preferably more than 650 gae/liter).
A method according to any one of the previous claims wherein the mixture of bases include at least one base other than ammonia and isopropylamine.
A method according to any one of the previous claims wherein the nitrogen bases comprise at least two selected from the group consisting of ammonia, mono-(C1 to C10)alkyl amines, di-(C1 to C4) alkyl amines and tri-(C1 to C4 alkyl) amines and more preferably from the group consisting of ammonia, mono-(C1 to C4) alkyl amines, di-(C1 to C4) alkyl amines and tri-(C1 to C4 alkyl) amines.
A method according to any one of the previous claims wherein the nitrogen bases comprise at least two selected from the group consisting of ammonia, methylamine, dimethylamine, diethylamine, isopropylamine, diisopropylamine, triethylamine.
A method according to any one of the previous claims wherein the mixture of bases includes at least three bases.
A method according to any one of the previous claims wherein the mixture of bases further include at least one of potassium hydroxide and sodium hydroxide.
A method according to any one of the previous claims comprising loading the aqueous mixture of glyphosate salts into containers of volume in the range of 0.1 to 10000 liters to substantially fill the containers, transporting the filled containers and dispensing the aqueous mixture of glyphosate salts from the containers.
A method according to any one of the previous claims wherein mole ratio of nitrogen bases:glyphosate acid is in the range of from 0.9:1 to 1:1.3.
A method according to any one of the previous claims wherein the reaction between the glyphosate acid and nitrogen bases is carried out at a temperature in the range of from 5° C. to 60° C.
A method according to any one of the previous claims wherein the method further comprises forming a mixture of at least one further acid herbicide with glyphosate acid and reacting the mixture of the at least two bases with the mixture of glyphosate acid and at least one other acid herbicide.
A method according to claim 18 wherein the at least one acid herbicide is selected from the group consisting of dicamba, clopyralid, 2,4-D, MCPA and mecaprop.
A method according to claim 18 or claim 19 wherein the glyphosate acid comprises at least 80% by weight of the total acid herbicide including glyphosate acid.
A method according to any one of claims 18 to 20 wherein the molar ratio of total nitrogen bases:total acid herbicides is in the range of from 0.9:1 to 1.3:1.
A method according to any one of the previous claims further comprising addition of a surfactant.
Dependencies are inferred from the claim text.