Process for the continuous production of...

Details Process for the continuous production of... Process for the continuous production of...

C - Chemistry, Metallurgy

07

F

260/501.4

C07F 9/38 (2006.01)

Patent

CA 1331627

A PROCESS FOR THE CONTINUOUS PRODUCTION OF 2-PHOSPHONO- TANE-1,2,4-TRICARBOXYLIC ACID AND ALKALI METAL SALTS THEREOF ABSTRACT OF THE DISCLOSURE This invention relates to an improved process for the continuous production of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and alkali metal salts thereof, in which dialkylphosphite, and ethene-1,2-dicarboxylic acid dialkyl ester, are reacted in the presence of a basic catalyst to form phosphonosuccinic acid tetraalkyl ester, the ester thus obtained is directly reacted with alkyl-acrylate, in the presence of an alkaline catalyst and the reaction product thus obtained is directly hydrolyzed to PBTC or alkali metal salts thereof.

610139

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