Basf Se Corporation

Basf Aktiengesellschaft

Gunther Van Cauwenberge

Johann-Peter Melder

Bram Willem Hoffer

Ekkehard Schwab

Thomas Krug

Frank-Friedrich Pape

Karin Pickenäcker

Bernd Stein

Thilo Hahn

Holger Evers

Michael Jödecke

Jürgen Moors

Tom Fremau

Klemens Massonne

Till Gerlach

Matthias Frauenkron

Ortmund Lang

Kirsten Dahmen

Steffen Oehlenschlaeger

Jan Nouwen

Kai Michael Exner

Frank Kiesslich

A process for preparing pure triethanolamine (TEOA) by continuously distillatively separating an ethanolamine mixture comprising TEOA and diethanolamine (DEOA), by distilling off DEOA in a distillation column (DEOA column) and supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is &#x3c;20 minutes.

Process for preparing pure triethanolamine (TEOA)

Processes comprising: providing a mixture comprising monoethylene glycol and diethylenetriamine; and subjecting the mixture to extractive distillation with a diethylenetriamine-selective solvent comprising triethylene glycol to provide a first stream comprising monoethylene glycol and a second stream comprising diethylenetriamine; wherein the first stream is substantially free of diethylenetriamine, and wherein the second stream is substantially free of monoethylene glycol.

Process for the distillative separation of mixtures comprising monoethylene glycol and diethylentriamine

The present invention relates to a process for improving the color stability by postpurifying piperazine, the steps comprising The invention further provides a rapid test of aging for checking the improvement in the color stability.

Method for improving a piperazine colour stability

A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein the process is carried out in two process stages in which

Method for producing ethylene amines ethanol amines from monoethylene glycol (MEG)

Processes comprising: providing a starting material comprising monoethanolamine; and reacting the starting material with ammonia in the presence of a heterogeneous transition metal catalyst to form a reaction product comprising one or more ethylene amines; wherein the catalyst comprises a catalytically active composition, which prior to treatment with hydrogen, comprises a mixture of oxygen-containing compounds of aluminum, copper, nickel and cobalt; and wherein the catalyst is present as one or more shaped catalyst particles selected from spheres, extrudates, pellets and other geometries, wherein the sphere or extrudate has a diameter of &#x3c;3 mm, the pellet has a height of &#x3c;3 mm, and the other geometries have an equivalent diameter L=1/a' of &#x3c;0.70 mm, where a&#x2032; is the external surface area per unit volume (mm/mm), as defined by where Ais the external surface area of the catalyst particle (mm) and Vis the volume of the catalyst particle (mm).

Process for producing ethyleneamines

A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein a catalyst having an active composition comprising ruthenium and cobalt and no further additional metal of group VIII and also no metal of group IB is used in the form of shaped catalyst bodies which in the case of a spherical shape or rod shape in each case have a diameter of &#x3c;3 mm, in the case of a pellet shape have a height of &#x3c;3 mm and in the case of all other geometries in each case have an equivalent diameter L=1/a' of &#x3c;0.70 mm, where a&#x2032; is the external surface area per unit volume (mm/mm) and: where Ais the external surface area of the shaped catalyst body (mm) and Vis the volume of the shaped catalyst body (mm), is proposed.

Method for producing ethylene amines and ethanol amines by the hydrogenating amination of monoethylene glycol and ammonia in the presence of a catalyst

Processes are described comprising: (i) providing a reactant comprising 1,2-dichloroethane; and (ii) reacting the reactant with ammonia to form a reaction product comprising one or more ethylene amines and hydrogen chloride, wherein the reaction is carried out in the presence of an organic, nitrogen- or phosphorus-containing compound which reacts with the hydrogen chloride to form an ionic liquid.

Processes for producing ethylene amines

The invention relates to a process for continuously, distillatively removing piperazine from an ethylenediamine-piperazine mixture under pressure at elevated temperature, by discharging the ethylenediamine at the top and the piperazine at the bottom of a distillation column. For the purpose of improving the quality of the piperazine, especially its color and color stability, the piperazine is subjected directly to circulation conveying it through an evaporator unit operated at a temperature of from about 160&#xb0; C. to about 170&#xb0; C. and returning it into the distillation column. After a residence time of from about 30 min to about 60 min in the circulation system, the piperazine is discharged in vapor form from a side draw in the lower section of the distillation column.

Process for distillatively removing piperazine from an ethylenediamine-piperazine mixture

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Temse, Belgium

Gunther Van Cauwenberge