C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
260/458.8
C07F 9/32 (2006.01)
Patent
CA 1204446
PROCESS FOR THE CONTINUOUS PRODUCTION OF 2-CARBOXYETHYL- ALKYL-PHOSPHINIC ACID DIALKYLESTERS ABSTRACT OF THE DISCLOSURE The disclosure relates to a process for the continuous production of 2-carboxyethyl-alkyl-phosphinic acid dial- kylesters by reacting an alkanephosphonous acid monoalkyl- ester with an acrylic acid ester in the presence of a me- tal alcoholate, To this end, the disclosure provides: a) for a quantity by volume (corresponding to the reactor volume) of 2-carboxyethyl-alkyl-phosphinic acid dialkyl- ester which is to be produced, to be introduced into a reactor adapted to circulate reaction mixture therein, closed in itself and provided with cooling means and an overflow, and circulated in the reactor; b) for the alkanephosphonous acid monoalkylester, acrylic acid alkylester and an alcoholic solution of the metal alcoholate to be continuously introduced into the reac- tor while cooling the material circulated therein, and for the whole to be reacted at a temperature of about O to 80°C; and c) for a mixture containing final product to be continuously removed through the overflow of the reactor and for 2-carb- oxyethyl-alkyl-phosphinic acid dialkylester to be distilla- tively separated from the mixture.
441216
Gehrmann Klaus
Ohorodnik Alexander
Rosenthal Johannes
Clariant Gmbh
Fetherstonhaugh & Co.
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