Adisseo Ireland Limited

Adisseo France Sas

Rhone-poulenc Agro

Aventis Animal Nutrition S.a.

Michel Garrait

Georges Gros

Patrick Rey

Claude Casse

Jacques R Taillades

George Gros

Fr&eacute;d&eacute;ric Carencotte

A process for purifying an aqueous solution to obtain purified gaseous acrolein by introducing the aqueous solution into a distillation column equipped at its base with at least one boiler and at its top with at least one condenser, withdrawing a liquid mixture essentially containing water at the base of the distillation column, withdrawing a gas essentially containing acrolein and water at the top of the distillation column, cooling the gas mixture withdrawn at the top of the distillation column in the condenser, to a temperature which makes it possible to obtain, on the one hand, an aqueous condensate and, on the other hand, an acrolein-rich gas mixture, and withdrawing the acrolein-rich gas mixture.

Method for the purification of acrolein

The invention relates to a new process for the preparation of hydroxymethylthiobutyric acid by sulphuric hydrolysis of hydroxymethylthiobutyronitrile.

Process for the preparation of hydroxymethylbutyric acid

The invention concerns an improved method for separating hydroxymethylthiobutyric acid by neutralising hydroxymethylthiobutyronitrile sulphuric hydrolysate, decanting and treating each phase with an organic solvent.

Method for separating hydroxymethylthiobutyric acid

A process for the production of an organic phosphorus-containing product, which comprises reacting a phosphorus-containing oxide with an unsaturated hydrocarbon in the presence of a boron-containing compound at a temperature of less than or equal to 50&deg; C.

Process for the production of a phosphorus-containing organic compound

A process, for the preparation of an ester of 2-hydroxy-4-methylthiobutyric acid which is substantially in the monomeric form, which process, being capable of industrial application and which comprises reacting 2-hydroxy-4-methylthiobutyric acid with an alcohol in the presence of water and an acid catalyst at a temperature of from 30 to 150&deg; C. wherein the acid is the direct product of the hydrolysis of 2-hydroxy-4-methylthiobutyronitrile.

Process for the preparation of hydroxy 4-methyl thiobutyric acid esters

A process for the preparation of 2-hydroxy-4-methylthiobutyric acid ester which comprises (a) a first step of reacting 2-hydroxy-4-methylthiobutyronitrile with sulphuric acid to produce 2-hydroxy-4-methylthiobutyramide, and (b) a second step of reacting the 2-hydroxy-4-methylthiobutyramide with an alcohol to produce a 2-hydroxy-4-methylthiobutyric acid ester, the two steps being carried out in the same reaction medium.

Growing community of inventors

Millery, France

Michel Garrait