Arkema France

Stephane Denis

Serge Tretjak

Anne Moreliere

Michel Fauconet

Jean-Michel Paul

Roger L Roundy

Lionel Delais

Samuel Marc Daniel

Gilles Frimour

Samuel Daniel

The present invention relates to a method for producing a C-Calkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification reactor comprising a cationic resin as a catalyst. Said method is characterized in that the molar ratio of alcohol to acid at the inlet of the reactor is between 1.4 and 3, and in that the crude reaction mixture circulates in a recirculation loop joining the reactor and the water removal column, at a recirculation rate of between 6 and 25, expressed by the mass ratio between the flow fed into the loop and the flow sent to a purification treatment.

Method for producing alkyl (meth)acrylates

The subject matter of the present invention is an improvement in the continuous production of methyl (meth)acrylate or of ethyl (meth)acrylate by direct esterification of (meth)acrylic acid with methanol or ethanol, under reaction conditions for which the acid is in excess relative to the alcohol, in particular with an acid/alcohol molar ratio of between 1.0 and 4, and under a pressure ranging from atmospheric pressure to 5 bar. The process of the invention makes it possible to minimize the formation of ethyl ethoxypropionate during the esterification reaction, and results in an improvement in the material balance, simplification of the purification train for the desired ester, and optimization of the energy balance.

Process for producing light (meth)acrylic esters

The present invention relates to methods by which the thermal dissociation of Michael adducts present in a stream of crude acrylic acid, called 'crude ester grade', and the esterification reaction of acrylic acid present in the stream of crude acrylic acid, or generated in situ by thermal dissociation, with a light alcohol, are carried out simultaneously.

Method for continuous production of light acrylates by esterification of a raw ester-grade acrylic acid

The invention relates to a liquid-liquid extraction process, comprising: The invention also relates to a process for the production of acrylic ester in which the production stream is treated by means of the above liquid-liquid extraction process.

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Leyviller, France

Stephane Denis