Arkema France

Sandeep Jain

Michel Fauconet

Christian Lacroix

Jean-Francois Devaux

Stephen Tlatlik

Leonel Gomes

Alexandre Terrigeol

The present invention concerns a method of decarbonating a gas stream containing from 15% to 60% carbon dioxide, by passage of the said gas stream over a zeolitic agglomerate comprising at least one binder and at at least one zeolite, and having a mesoporous volume of between 0.02 cm·gand 0.15 cm·gand a mesoporous volume fraction of between 0.1 and 0.5, preferably between 0.15 and 0.45.

Method of decarbonating gas streams

A process for the recovery of polymer-grade (meth)acrylic acid, in the absence of organic solvent, from a gaseous reaction mixture comprising (meth)acrylic acid obtained by gas-phase oxidation of a precursor of the (meth)acrylic acid, the process carried out in a plant comprising at least one dehydration column and one finishing column, being characterized by the presence of at least one chemical treatment agent targeted at reducing the content of residual aldehydes. (Meth)acrylic acid obtained according to the invention meets criteria of high quality allowing it to be used in the manufacture of acrylic polymers, in particular for superabsorbents. This grade is also known as glacial acrylic acid GAA.

Process for producing polymer-grade (meth)acrylic acid

The invention is directed to a process for recovering/purifying (meth)acrylic acid which does not use azeotropic solvent and is based on the use of two columns for purifying a reaction mixture comprising (meth)acrylic acid. The process according to the invention includes a dry vacuum pump condensation system, which makes it possible to reduce the amount of final aqueous discharges.

Process for producing (meth)acrylic acid

The present invention relates to the manufacture of biobased acrylic acid from glycerol as starting material, the term 'biobased acid' indicating that the acrylic acid is essentially based on a carbon source of natural origin.

Method for the production of bio-sourced acrylic acid

The invention relates to the production of (meth)acrylic acid, and to implementation of a step of condensing water contained in a recycled gas effluent and/or in the air feed in a (meth)acrylic acid production process, which further includes a process for purifying a reaction mixture comprising (meth)acrylic acid without using azeotropic solvent and based on the use of two distillation columns.

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Paris, France

Sandeep Jain