Basf Aktiengesellschaft

Basf Se Corporation

Andreas Ansmann

Hermann Luyken

Frank Ohlbach

Peter Bassler

Johann-Peter Melder

Rolf-Hartmuth Fischer

Martin Merger

Rolf Hartmuth Fischer

Stefan Maixner

Christoph Benisch

Guido Voit

Alwin Rehfinger

Peter Baβler

Michael Hesse

Ekkehard Schwab

Frank Funke

Manfred Stroezel

Bernhard Bockstiegel

Heinz Etzrodt

Andrea Frenzel

Klaus Reimer

G&uuml;nther Achhammer

Jochem Henkelmann

Gerd Kaibel

Klemens Flick

Alois Kindler

Walter Dobler

Matthias Eiermann

Carsten Oost

Mathias Haake

Christian Miller

Susanne Stutz

Helmut Winterling

Christian Tragut

Franz Josef Br&ouml;cker

Lothar Laupichler

Matthias Müller

Ulrich Kammel

Günther Achhammer

Henning-Peter Gehrken

Rolf Hartmut Fischer

Peter Basler

The iron-containing catalyst suitable for use as a catalyst contains a) iron or a mixture containing iron and an iron-based compound. The iron has an average crystallite size ranging from 1-35 nm measured by X-ray diffraction.

Iron-containing material suitable for use as hydrogenation catalyst

The invention relates to a process for the selective hydrogenation of alkynes and dienes in C2-C5-olefin mixtures,&#x2014;in C2- or C3-streams of the olefin preparation by cracking. The method comprises conducting the hydrogenation in the presence of a catalyst particle comprising (a) a metal of the tenth group of the Periodic Table, (b) a metal of the eleventh group of the Periodic Table and (c) optionally a compound of a metal of the first or second group of the Periodic Table. Components (a) and (b), and optionally (c), are applied to a support selected from the group consisting of silica, titanium dioxide, zirconium oxides, spinels, zinc aluminates, zinc titanate, aluminosilicates and mixtures thereof. The metal of the eleventh group is distributed homogeneously over the cross-section of the catalyst particle, and the metal of the tenth group is present in an edge layer close to the surface of the catalyst particle.

Supported catalyst for the selective hydrogenation of alkynes and dienes

The disclosure relates to a process for purifying crude caprolactam. The process involves converting a first mixture of 6-amino capronitrile and water to a second mixture of caprolactam ammonia, water, high boilers and low boilers using a catalyst. The ammonia is removed from the second mixture to obtain a third mixture. Water is removed from the third mixture to give crude caprolactam, high boiler and low boilers. Purified caprolactam is then obtained by a series of distillation steps.

Method for purifying caprolactam

A process for reducing the level of an aliphatic monounsaturated amine (IV) in a mixture (V) containing an aminonitrile (I) or a diamine (II) or a dinitrile (III) or mixtures thereof as well as said mine (IV) by

Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof

A catalyst for the selective hydrogenation of alkynes and dienes in C2-C5-olefin mixtures is described. These catalysts contain

Carrier catalytic converter for the selective hydrogenation of alkines and dienes

A process for removing high boilers from crude caprolactam which comprises high boilers, caprolactam and in some cases low boilers, and which has been obtained by

Purification of caprolactam

An oxidic composition which is suitable as a catalyst having divalent and trivalent iron in an atomic ratio of divalent to trivalent iron in the range from greater than 0.5 to 5.5 and oxygen as a counterion to the divalent and trivalent iron. The catalyst composition is useful in the hydrogenation of nitriles to amines.

Iron-containing oxidic material suitable for use as hydrogenation catalyst precursor

A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises

Hydrogenation catalyst

The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that has a hexamethylenediamine content of less than 1 wt. -%, b) removing completely or partially the 6-aminocapronitrile from mixture (I) while obtaining a mixture (II) whose content in substances that have a higher boiling point as 6-aminocapronitrile under distillation conditions and that cannot be formed by dimerization reactions when 6-aminocapronitrile is thermally treated is less than 1 wt. -%, and c) completely or partially removing from mixture (II) the hexamethylenediamine that might be present while obtaining a mixture (IV) whose hexamethylenediamine content is higher than that of mixture (II), and a mixture (V) whose hexamethylenediamine content is lower than that of mixture (II).

Method for removing 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine

A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NHgroups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein

Method for generating catalysts

A process for distillative removal of ammonia from solutions (I) which include a lactam and ammonia comprises effecting said removal in a distillation apparatus (a) at an absolute pressure of less than 10 bar.

Method for separating ammonia from solutions containing caprolactam and ammonia

A process for preparing a polymer, which comprises

Method for producing a polymer, using caprolactam

A material useful as catalyst for the hydrogenation of alpha, omega-dinitriles comprises (a) iron or a compound based on iron or mixtures thereof, (b) from 0.001 to 0.3% by weight based on (a) of a promoter based on 2, 3, 4 or 5 elements selected from the group consisting of aluminum, silicon, zirconium, titanium and vanadium, (c) from 0 to 0.3% by weight based on (a) of a compound based on an alkali and/or alkaline earth metal, and also (d) from 0.001 to 1% by weight based on (a) of manganese.

Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile

Higher &agr;,&bgr;-unsaturated alcohols are prepared by monoethynylation of a ketone by the NH /KOH method, if desired hydrogenation of the acetylene alcohol in the presence of hydrogen over a Pd-containing thin layer catalyst, purifying distillation of the hydrogenation product, preferably in a dividing wall column with recirculation of the unreacted ketone to the ethynylation step, and, if desired, preparation of higher alcohols having in each case 5 more carbon atoms in the chain by reacting the alcohols prepared by monoethynylation and, if desired, partial hydrogenation with alkyl acetoacetates diketene in a Carroll reaction to form ketones and using these as starting materials for the steps ethynylation, optional hydrogenation and fractional distillation.

Preparation of higher &agr;, &bgr;-unsaturated alcohols

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Wiesloch, Germany

Andreas Ansmann