Basf Se Corporation

Basf Aktiengesellschaft

Mirko Kreitschmann

Johann-Peter Melder

Jan Kurt Eberhardt

Thomas Krug

Maxim Peretolchin

Jörg Pastre

Wolfgang Reif

Frank-Friedrich Pape

Thilo Hahn

Udo Rotermund

Wolfgang Mägerlein

Anton Meier

Alfred Krause

Hauke Malz

Thomas Flug

Lionel Gehringer

Ulrike Mahn

Franz Borgel

Ulrich Köhler

Dominik Herbrecht

Sylvia Rybicki

Jörn Duwenhorst

Michael Salla

Jean-François Stumbe

Dietmar Häring

Jan Eberhardt

Peter Fritsch

A method for reliably avoiding backflow in the transport of a liquid under pressure via a transport pipe (), in which a shut-off device () with differential pressure switching is arranged, into a container () which is under pressure and which comprises the liquid to be transported and/or another liquid is proposed, wherein a pressure accumulator () which is filled with the liquid to be transported up to a certain level and above the liquid level, in direct contact with the liquid to be transported, with an inert gas is arranged in the transport pipe () upstream from the shut-off device () in the transport direction, the inert gas being provided in the pressure accumulator () under an excess pressure and in an amount relative to the container () to be filled which are designed so that, in the case of a drop in the pressure in the transport pipe (), the inert gas ensures a positive pressure difference in the transport pipe () to the container () over a period which is at least as long as the reaction time of the shut-off device () and the shut-off device () has an emptying pipe () with emptying valve ().

Method for safely preventing backflowing in the conveying of a fluid

The present invention relates to a process for reacting glycolaldehyde with an aminating agent in the presence of hydrogen and of a catalyst, the catalyst being activated by reducing a catalyst precursor or by reducing a passivated catalyst, which comprises effecting the reaction in the presence of a solvent and contacting the glycolaldehyde with the activated catalyst.

Reaction of glycolaldehyde with an aminating agent

The present invention relates to a process for preparing ethanolamines by reacting glycolaldehyde with monoethanolamine and/or diethanolamine in the presence of a catalyst.

Method for preparing higher ethanolamines

The present invention relates to a process for preparing 3-dimethylaminopropylamine (DMAPA) by reacting 3-dimethylaminopropionitrile (DMAPN) with hydrogen in the presence of a catalyst, wherein the DMAPN used has a content of 2-(dimethylaminomethyl)glutaronitrile (DGN) of 300 ppm by weight or less, based on the DMAPN used. Furthermore, the present invention relates to mixtures of DMAPN and DGN, wherein the weight ratio of DMAPN to DGN is in the range from 1 000 000:5 to 1 000 000:250.

DMAPN having a low DGN content and a process for preparing DMAPA having a low DGN content

Plastics comprise sterically hindered, esterified amine (I) which contains less than 100 ppm, based on the weight of (I), of titanium.

Plastic, particularly a sterically hindered esterified amine containing polyurethane

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Mannheim, Germany

Mirko Kreitschmann