Process for the preparation of alkali metal salts of...

Details Process for the preparation of alkali metal salts of... Process for the preparation of alkali metal salts of...

C - Chemistry, Metallurgy

07

F

C07F 9/38 (2006.01)

Patent

CA 2049769

ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the preparation of alkali metal salts of 2-phosphonobutane- 1,2,4-tricarboxylic acid, characterized in that 2-phosphonobutane-1,2,4-tricarboxylic acid penta-alkyl esters or partial esters are reacted with an aqueous alkali metal hydroxide solution in a ratio of from 0.5 to 0.76 mol, preferably from 0.6 to 0.7 mol of alkali metal hydroxide per mol of ester function at temperatures from 20 to 200°C in a one-shot process. Le A 27 533

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