Continuous process for production of methacrylic acid ester of C

Details Continuous process for production of methacrylic acid ester of C Continuous process for production of methacrylic acid ester of C

1986-07-31

1988-05-31

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

C07C 6708

Patent

active

047482680

ABSTRACT:
A continuous process for the production of methacrylic acid ester of a C.sub.1 to C.sub.4 saturated aliphatic alcohol in the presence of a catalyst is disclosed. This process contemplates continuously introducing into a plug-flow reactor a feed stream containing methacrylic acid, a C.sub.1 to C.sub.4 saturated aliphatic alcohol in stoichiometric exesss relative to the methacrylic acid present, an esterification catalyst, and a liquid organic substance having a volatility no greater than that of methacrylic acid. The feed stream thus introduced into the plug-flow reactor is preferably maintained at substantially atmospheric pressure, while the contained methacrylic acid reactant is held at an esterification temperature and for a time period sufficient to esterify at least a portion of the introduced methacrylic acid. The admixture thus produced is continuously fractionated, preferably in a distillation zone or column, into a vaporized distillate stream and a liquid bottoms stream. The distillate stream has a relatively greater methacrylic acid ester content than the bottoms stream. A portion of the bottoms stream, constituted primarily by the liquid organic substance and the esterification catalyst, is recycled to the reactor while the remainder is purged.

REFERENCES:
patent: 3821286 (1974-06-01), Pai et al.
patent: 4329492 (1982-05-01), Andoh et al.
patent: 4435594 (1984-03-01), Matsumura et al.
patent: 4474981 (1984-10-01), Katoh et al.
Levenspiel, Octave Chemical Reaction Engineering, 2nd Ed. (1972) John Wiley & Sons, Publ. pp. 97, 98, 144 and 145.

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