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AssigneeNufarm Australia Limited
InventorsAllan Spencer, Aristos Panayi, Chad Richard Ord Sayer
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A method for preparing an aqueous mixture of glyphosate salts to improve the handling of the mixture, the method comprising forming a homogeneous mixture of at least two bases comprising at least one alkali metal hydroxide, and at least one further base selected from alkali metal hydroxides and nitrogen bases and reacting the mixture of the at least two bases with glyphosate acid in an aqueous reaction medium 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 for preparing an aqueous mixture of glyphosate salts to improve the handling of the mixture, the method comprising forming a homogeneous mixture of at least two bases comprising at least one alkali metal hydroxide, and at least one further base selected from alkali metal hydroxides and nitrogen bases and reacting the mixture of the at least two bases with glyphosate acid in an aqueous reaction medium 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 mixtures of bases include at least two alkali metal hydroxides selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.
A method according to any one of the previous claims wherein the concentrate of glyphosate salts is at least 360 gae/L and preferably at least 450 gae/L.
A method according to any one of the previous claims wherein the concentrate of glyphosate salts is at least 500 gae/L.
A method according to any one of the previous claims wherein the concentrate of glyphosate salts is at least 550 gae/L.
A method according to any one of the previous claims wherein the concentration of the glyphosate is at least 600 gae/L.
A method according to any one of the previous claims wherein at least one nitrogen base is present including at least one of ammonia, mono-(C1 to C10) 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 at least one of ammonia, methylamine, dimethylamine, isopropylamine, diisopropylamine, triethylamine.
A method according to any one of the previous claims wherein the mixture of at least two bases includes at least one selected from the group consisting of sodium hydroxide, ammonium, methylamine, dimethylamine and triethylamine.
A method according to any one of the previous claims wherein when the bases include potassium hydroxide and isopropylamine then at least one further base is present selected from the group consisting of alkali metal hydroxides, ammonia, C1 to C4 alkylamine, di-(C1 to C4alkyl)amine, tri-(C1 to C4 alkylamine and C1 to C4alkanolamine.
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 comprising loading the aqueous mixture of glyphosate salts into containers of volume in the range of 0.1 to 10,000 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 total of alkali metal and said nitrogen bases to 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 bases is carried out at a temperature in the range of from 5° C. to 80° 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 to provide a composition comprising a mixture of glyphosate salts and a mixture of the at least one further acid herbicide salt.
A method according to any one of the previous claims further comprising addition of a surfactant.
Dependencies are inferred from the claim text.