Process for the continuous production of 2-phosphone-butane-1,2,

Details Process for the continuous production of 2-phosphone-butane-1,2, Process for the continuous production of 2-phosphone-butane-1,2,

1989-08-16

1990-06-05

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

558126, C07F 938, C07F 940

Patent

active

049315862

ABSTRACT:
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.

REFERENCES:
patent: 3886204 (1975-05-01), Geffers et al.
patent: 3886205 (1975-05-01), Geffers et al.
patent: 3923876 (1975-12-01), Heins et al.
patent: 4020101 (1977-04-01), Geffers et al.

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