Basf Se Corporation

Roland Bou Chedid

Johann-Peter Melder

Roman Dostalek

Bernd Stein

Ulrich Abel

Frank-Friedrich Pape

Markus Christian Biel

Christian Gruenanger

Alfred Oftring

Torsten Katz

Gabriele Iffland

Jörg Pastre

Alfred Krause

Martin Rudloff

Wolfgang Staffel

Jürgen Ciprian

Michael Jödecke

Nina Challand

Steven Brughmans

Aik Meam Tan

Christian GRÜNANGER

Process for the preparation of racemic &#x3b1;-amino acids or of glycine, wherein the corresponding &#x3b1;-hydroxycarboxylic acid, selected from hydroxyacetic acid, lactic acid, malic acid, &#x3b1;-hydroxyglutamic acid, isocitric acid, tartronic acid and tartaric acid, or at least one salt of the corresponding &#x3b1;-hydroxycarboxylic acid is reacted in the presence of at least one heterogeneous catalyst which comprises at least one transition metal, in the presence of hydrogen with at least one nitrogen compound (c), where the nitrogen compound (c) is selected from primary and secondary amines and ammonia.

Process for the preparation of racemic alpha-amino acids

Process for the preparation of alkali metal salts of glycine or of racemic &#x3b1;-amino acids of the general formula (I)R&#x2014;CH(NH)&#x2014;COOH&#x2003;&#x2003;(I) in which Ris selected from hydrogen, CH, CH, CH(CH), (CH)COOH and CHOH, wherein an alkali metal salt of the corresponding &#x3b1;-ketocarboxylic acid or glyoxalic acid is reacted in the presence of at least one heterogeneous catalyst, which comprises at least one transition metal, in the presence of hydrogen with at least one nitrogen compound at temperatures in the range from 50 to 200&#xb0; C., where the nitrogen compound is selected from primary and secondary amines and ammonia.

Method for producing amino acids

Process for preparing pyrrolidine of the formula I by reacting 1,4-butanediol (BDO) of the formula II with ammonia in the presence of hydrogen and a supported, metal-containing catalyst, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and in the range from 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 160 to 230&#xb0; C., using ammonia in a molar ratio to BDO used of from 5 to 50 and in the presence of 1.0 to 4.5% by weight of hydrogen, based on the amount of BDO used.

Process for preparing pyrrolidine

Process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia in the presence of hydrogen and a supported, metal-containing catalyst has been found, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and in the range from 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220&#xb0; C., using ammonia in a molar ratio to DEOA used of from 5 to 25 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia.

Process for preparing piperazine

Process for the preparation of a mono-N-alkylpiperazine of the formula I in which Ris C- to C-alkyl or 2-(2-hydroxyethoxy)ethyl,by reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula HN&#x2014;R(III) in the presence of hydrogen and a catalyst molding, where the reaction is carried out in the liquid phase at an absolute pressure in the range from 150 to 250 bar and the amination is carried out by means of a catalyst molding, the precursor of which can be prepared according to a process in which

Process for the preparation of a mono-N-alkylpiperazine

Process for the preparation of a mono-N-alkylpiperazine of the formula I in which Ris C- to C-alkyl or 2-(2-hydroxyethoxy)ethyl,by reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula HN&#x2014;R(III) in the presence of hydrogen and a supported, metal-containing catalyst, where the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and, in the range from 0.2 to 5.0% by weight, oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 95 to 145 bar.

Process for the preparation of a mono-N-alkypiperazine

A process for preparing an N,N-dialkylethanolamine of the formula I having high color stability where Rand Rare each independently a C- to C-alkyl group, by reacting ethylene oxide (EO) with a corresponding dialkylamine (RRNH) in the presence of water, wherein the reaction is effected continuously in a reactor, the reaction temperature is in the range from 90 to 180&#xb0; C. and the residence time (RT) in the reactor is in the range from 1 to 7 min, the reactor output is treated thermally at a temperature in the range from 80 to 160&#xb0; C. over a period in the range from 20 to 1000 min, and then the N,N-dialkylethanolamine is removed by distillation.

Process for preparing an N,N-dialky-ethanolamine having high color stability

A method for depleting halide ions from liquid ammonia, which comprises bringing the liquid ammonia into contact with a strongly basic ion exchanger, where the basic structure of the strongly basic ion exchanger is a covalently crosslinked polymer matrix and the content of ammonia in the liquid ammonia is more than 98% by weight.

Method for removing halogen from liquid ammonia

A process for preparing 2-(2-tert-butylaminoethoxy)ethanol (tert-butylaminodiglycol, TBADG) by reacting diethylene glycol (DG) with tert-butylamine (TBA) in the presence of hydrogen and of a copper catalyst, by effecting the reaction at a temperature in the range from 160 to 220&#xb0; C. in the presence of a copper- and aluminum oxide-containing catalyst, where the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises

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Mannheim, Germany

Roland Bou Chedid