Process for the production of triaryl-organo borates of the formula 1 / m A m + R 1 BR 3 3 − obtainable or obtained by reacting a boronic ester of formula B(OR 2) 3 with an organolithium- or Grignard-reagent of formula R 1 -E in a solvent or solvent mixture S1, adding a previously formed organometallic reagent of the formula R 3 -M-X in a solvent or solvent mixture S2, further adding a salt of the formula 1/m A m+ Y - (VIII) and isolating the precipitated triaryl-alkyl borate product of formula 1 / m A m + R 1 BR 3 3 − in which A stands for a substituted organic cation with the charge m on the basis of nitrogen, phosphorus, oxygen, sulfur and/or iodine, B stands for boron E stands for lithium or magnesium-monohalide, M stands for a metal selected from magnesium, calcium, aluminum, tin, zinc or cadmium, X stands for chlorine, bromine or iodine, preferably chlorine or bromine, Y stands for halide, alkoxyde, or sulfide, preferably for halide, R 1 stands for a C 1 - to C 22 -alkyl-, C 3 - to C 22 -alkenyl-, C 3 - to C 22 -alkynyl-, C 5 - to C 7 -cycloalkyl- or C 7 - to C 15 -aralkyl-residue, which can be optionally substituted by oxygen or nitrogen or halogen, R 2 stands for an optionally branched C 1 - to C 22 -alkyl-residue or an optionally alkyl-substituted C 3 - to C 7 -cycloalkyl-residue or an optionally aryl- or hetaryl substituted C 2 - to C 22 -alkyl-residue or R 2 may form a 2-8-membered bicyclic ring optionally substituted by alkyl residues and/or by oxygen atoms or R 2 may form 4-14-membered tricyclic ring an optionally substituted by alkyl residues and/or by oxygen atoms, R 3 stands for a C 6 - to C 14 -aryl residue optionally substituted by at least one residue selected from halogen, C 1 -to C 4 -alkyl, trifluoromethyl, C 1 - to C 4 -alkoxy, trifluoromethoxy, phenyl and/or phenoxy, m stands for 1, 2 or 3, preferably for 1 or 2, most preferably for 1, S1 and S2 independently from one another stand for an aprotic organic solvent or a mixture of aprotic organic solvents, A stands for a substituted organic cation with the charge m on the basis of nitrogen, phosphorus, oxygen, sulfur and/or iodine, B stands for boron E stands for lithium or magnesium-monohalide, M stands for a metal selected from magnesium, calcium, aluminum, tin, zinc or cadmium, X stands for chlorine, bromine or iodine, preferably chlorine or bromine, Y stands for halide, alkoxyde, or sulfide, preferably for halide, R 1 stands for a C 1 - to C 22 -alkyl-, C 3 - to C 22 -alkenyl-, C 3 - to C 22 -alkynyl-, C 5 - to C 7 -cycloalkyl- or C 7 - to C 15 -aralkyl-residue, which can be optionally substituted by oxygen or nitrogen or halogen, R 2 stands for an optionally branched C 1 - to C 22 -alkyl-residue or an optionally alkyl-substituted C 3 - to C 7 -cycloalkyl-residue or an optionally aryl- or hetaryl substituted C 2 - to C 22 -alkyl-residue or R 2 may form a 2-8-membered bicyclic ring optionally substituted by alkyl residues and/or by oxygen atoms or R 2 may form 4-14-membered tricyclic ring an optionally substituted by alkyl residues and/or by oxygen atoms, R 3 stands for a C 6 - to C 14 -aryl residue optionally substituted by at least one residue selected from halogen, C 1 -to C 4 -alkyl, trifluoromethyl, C 1 - to C 4 -alkoxy, trifluoromethoxy, phenyl and/or phenoxy, m stands for 1, 2 or 3, preferably for 1 or 2, most preferably for 1, S1 and S2 independently from one another stand for an aprotic organic solvent or a mixture of aprotic organic solvents,