Taminco N.v.

Taminco

Raf Loenders

Ivan Vanden Eynde

Piet Vanneste

Sabine Eeckhaoudt

The invention relates to the preparation of (meth)acrylate di-ammonium salts responding to formula (I) wherein Rrepresents hydrogen or methyl, each R, independently, represents an alkyl comprising from 1 to 4 carbon atoms, each R, independently, represents an alkyl or an aralkyl and each X, independently, represents an anion;having a high purity and their use as monomers for the synthesis of polymers useful as cationic flocculants.

Process for the preparation of (meth)acrylate di-ammonium salts and their use as monomers for the synthesis of polymers

Disclosed is a process for the preparation of primary, secondary and tertiary amines via a catalytic hydrogenation of unsubstituted, N-substituted, and N,N-disubstituted amides. The amide is led, together with an auxiliary amine, in vaporised form in a hydrogen containing gas flow over the catalyst. The process can be carried out at relatively low pressures, between 2 and 50 bars, using typical hydrogenation catalysts like CuCr-type catalysts. The amine is obtained with high yield and high selectivity. The process can be carried out in a continuous fixed bed reactor.

Growing community of inventors

Bierbeek, Belgium

Raf Loenders