Akzo Nobel N.v.

Akzo Nobel Chemicals International B.v.

Johan Lif

Per Anders Restorp

Boris Kuzmanovic

Anders Törncrona

Joakim Erik Patrik Högblom

Kristina Ekenberg

Martin Stefan Hanson

Leif Kenny Christian Gustafson

Ulf Schröder

The present invention relates to a particle of modified silica which comprises a particle of silica which is covalently linked to at least one halohydrin moiety. Furthermore, the present invention relates to a method of preparing the particle of modified silica, a particle of modified silica obtained by such method, use of the particle of modified silica as a stationary phase for chromatography, as well as a separation column for chromatography comprising the particle of modified silica.

Particle of modified silica

The present invention relates to a process to prepare ethylene amines by the amination of ethylene oxide, ethylene glycol or ethanolamine in the presence of a catalyst, comprising a step wherein methylamine and/or ethylamine are removed from the reaction effluents.

Process to prepare ethylene amines

The invention relates to a process for the manufacture of diethylenetriamine and higher polyethylenepolyamines by a transamination of ethylenediamine. The transamination is performed at a temperature from 135&#xb0; C. to 180&#xb0; C. at a pressure from 5 Mpa to 40 Mpa in the presence of hydrogen and a particulate catalysts containing 26 to 65% by weight of nickel on an oxide carrier. A high conversion degree of ethylenediamine and a high selectivity to form acyclic polyethylenepolyamines, such as diethylenetriamine are obtained by the process. The formation of cyclic amine compounds, e.g. piperazine, is low.

Process for the manufacture of diethylenetriamine and higher polyethylenepolyamines

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Skärhamn, Sweden

Johan Lif