Method for preparation of an aqueous glyphosate concentrate composition having mixture of amine salts

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.

1 . 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,   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 an aqueous mixture of herbicide salts,   wherein the concentration of glyphosate (based on glyphosate acid equivalent) is at least 200 gae/L, wherein the total acid herbicide salts, including glyphosate is at least 360 gae/L, at least two bases are selected from the group consisting of ammonia, C 1  to C 10  alkylamine, di-(C 1  to C 6  alkyl)amine, tri-(C 1  to C 6  alkyl)amine, C 1  to C 10  alkanolamine, C 1  to C 6  alkyl(C 1  to C 6  alkanol)amines and di-(C 1  to C 6  alkyl)C 1  to C 6  alkanolamines, and wherein the mole ratio of the at least two nitrogen bases:total acid herbicides is in the range of from 0.9:1 to 1.3:1.   
     
     
         2 . The method according to  claim 1 , wherein the at least one acid herbicide is selected from the group consisting of dicamba, aminopyralid, clopyralid, picloram, 2,4-D, MCPA, 2,4-DB, mecoprop, mecoprop-P, glufosinate, diclofop and fluazifop. 
     
     
         3 . The method according to  claim 2 , wherein the at least one acid herbicide is selected from the group consisting of dicamba, clopyralid, 2,4-D, MCPA and mecoprop. 
     
     
         4 . The method according to  claim 1 , comprising forming a premix of bases by mixing the bases to form a homogeneous mixture and reacting the premix with mixture of glyphosate acid and at least one other acid herbicide in an aqueous reaction medium. 
     
     
         5 . The method according to  claim 1 , wherein the concentration of acid herbicide salts, including glyphosate, is at least 450 gae/liter. 
     
     
         6 . The method according to  claim 1 , wherein the concentration of the acid herbicide salts, including glyphosate, is at least 600 gae per liter. 
     
     
         7 . The method according to  claim 1 , wherein the concentration of glyphosate salts is at least 360 gae/L. 
     
     
         8 . The method according to  claim 1 , wherein the at least one other acid herbicide comprises 2,4-D present in an amount of at least 200 g/L. 
     
     
         9 . The method according to  claim 1 , wherein the mixture of bases include at least one nitrogen base other than ammonia and isopropylamine. 
     
     
         10 . The method according to  claim 1 , wherein the nitrogen bases comprise at least two selected from the group consisting of ammonia, mono-(C 1  to C 10 )alkyl amines, di-(C 1  to C 4 )alkyl amines and tri-(C 1  to C 4  alkyl)amines. 
     
     
         11 . The method according to  claim 1 , wherein the nitrogen bases comprise at least two selected from the group consisting of ammonia, methylamine, dimethylamine, diethylamine, isopropylamine, diisopropylamine, triethylamine and triisopropylamine. 
     
     
         12 . The method according to  claim 1 , wherein the mixture of bases includes at least three nitrogen bases. 
     
     
         13 . The method according to  claim 1 , wherein the reaction between the glyphosate acid and nitrogen bases is carried out at a temperature in the range of from 5° C. to 90° C. 
     
     
         14 . The method according to  claim 1 , further comprising addition of a surfactant. 
     
     
         15 . The method according to  claim 14 , wherein the concentration of the surfactant is in the range of from 0.1 to 20% by weight of the aqueous glyphosate concentrate composition. 
     
     
         16 . The method according to  claim 14 , wherein the surfactant comprises one or more selected from the group consisting of quaternary ammonium surfactant; etheramine surfactants; alkylether and amine surfactant combinations; acetylenic diol and alkyl(poly)glycoside surfactant combinations; lipophilic fatty amine ethoxylate surfactants; alkoxylated amine surfactants; betaine surfactants; alkyl polyglycoside agents; secondary or tertiary alcohol surfactants; silicone copolymer wetting agents and trialkylamine oxide or quaternary amine or trialkylbetaine surfactant combinations; sorbitan fatty acid ester and amine, quaternary ammonium or alkylglycoside surfactant combinations; surfactants derived from alkanethiols; polyoxyalkylene trisiloxane surfactants; super-wetting agents selected from silicone-based and fluorocarbon-based surfactants; supra-molecular aggregates comprising one or more amphiphilic salts having a glyphosate anion and cation derived by protonation of secondary or tertiary oily amines; alkoxylated primary alcohol surfactants; alkyl polysaccharide derivates; alkyl polyglycoside and ethoxylated alcohol combinations; alkylglucosides; surfactants comprising polyhydroxyhydrocarbyl and amine functionality; alkylglycoside and alkoxylated alkylamine surfactant combinations; alkyldiamine tetraalkoxylate surfactants; succinic acid derivatives; alkoxylated amido amines; sugar glycerides; diamine surfactants; widely-bridged alcohol polyethoxylates; water-soluble long-chain hydrocarbyl dimethylamine oxides and quaternary ammonium halide combinations; hydroxyalkylammonium adjuvants; polyether diamine surfactants; cationic, anionic, nonionic or zwitterionic silicone adjuvants; organosilicone surfactants and diphenyl oxide sulfonate surfactant combinations; ether phosphate adjuvants; phosphorous surfactant adjuvants; polyglycerol and polyglycerol derivatives; C 8 -C 22  sarcosinate or sarcosinate salts; ethoxylated vegetable oils; polyethoxylated dialkylamine surfactants; C 10 -C 18  alkylpolyglycol ether sulfates; Sucrose & Sorbital Surfactants; Sorbitan Esters; Ethoxylated Saccahrose Esters; Coco Amido Propyl Dimethylamine Akyldimethylamines; Phosphated Esters Tallow Amine Surfactants; Trisiloxanes; TEA and MDEA Esterquats; Dimethylethanolamine based Esterquats; Alkyl Polysaccharide; Glucosides; Alkyl Polypentosides (APP); Polyglycerines; Etheramine Alkoxylates; Sorbitan Monolaurate; Pine Terpinic compounds; Cocoamine ethoxylates; Acrylates & Latex compounds; (Ethoxylated) Oleyl Alcohols; Alkylamine Alkoxylates; Etheramine Alkoxylates/Alkyl Etheramine; Quaternary Ammonium Salts/Ammonium Quaternary Derivatives; Quat Amines; Amine Oxides; Dialkoxylates Amines; Alkyl Alkoxylated Phosphates; Aminated Alkoxylated Alcohols; Dialkoxylated Amines; Carboxylates; Alkylethersulfates; Disodium sulfosuccinates/Succinates; Polyether Amines; Cocoamidopropyl betaines and salts of fatty acids.