Basf Aktiengesellschaft

Basf Se Corporation

Joachim Pfeffinger

Johann-Peter Melder

Eckhard Stroefer

Arthur H&ouml;hn

Frank Funke

Markus Weber

Frank Ohlbach

Till Gerlach

Carsten Knoesche

Andreas Woelfert

Christian Mueller

Rolf Pinkos

Peter Neumann

Gerd Kaibel

Ralf Pelzer

Robert Baumann

Bernd Leutner

Manfred Stroezel

Holger Friedrich

Ulrich Penzel

Peter Pfab

Miriam Bru Roig

Otto Watzenberger

Florian Garlichs

Christoph Benisch

Michael Bock

Roman Dostalek

Andreas Wölfert

Eckhard Ströfer

Filip Nevejans

Andreas Johann Schmidt

Hans Volkmar Schwarz

Axel Franzke

Frank Poplow

Manfred Heilig

Christian Müller

Joerg Pastre

Eva Koch

Oliver Bussmann

Michael H&uuml;llmann

Christoph Stock

Gerhard Laqua

Eckhard Str&ouml;fer

Stephan Goettke

Peter Van Den Abeel

Stephanie Renz

Stefan Ruedenauer

Anja Vinckier

Nicolas Marion

Volker Krase

Volker Scharr

Carsten Knösche

Margarethe Klos

Jan Jacobs

Dieter Starosta

Daniela Malkowsky

Willy Van Pee

Willi Gilcher

Willi Doell

Fritz N&auml;umann

Hilmar Boesel

J&uuml;rgen Dosch

Matthias Kl&ouml;tzer

Juergen Morell

Regina-Margareta Berg

Margerethe Klos

Jürgen Morell

Daniela Malkowski

The present invention relates to aroma chemical compositions containing 3,5-diethyl-2-propyl-tetrahydropyran, a 3,5-diethyl-2-propyl-dihydropyran or a 3,5-diethyl-2-propyl-pyran, a mixture of such compounds, a stereoisomer of one of these compounds, or a mixture of stereoisomers of one or more of these compounds. The invention further relates to a method for preparing such compounds, stereoisomers or mixtures thereof, to the composition obtainable by this method, to the use of such compounds as an aroma chemical or for modifying the scent character of a fragranced composition; and to a method for preparing a fragranced composition or for modifying the scent character of a fragranced composition using said compounds. Moreover, the invention relates to 3,5-diethyl-2-propyl-tetrahydropyran, to its stereoisomers and to mixtures of these stereoisomers.

Aroma chemical compositions containing 3,5-diethyl-2-propyl-tetrahydropyran and/or unsaturated derivatives thereof

A process for the continuous distillative separation of mixtures comprising morpholine (MO), monoaminodiglycol (ADG), ammonia, water and methoxyethanol (MOE), obtained by reacting diethylene glycol (DEG) with ammonia, wherein ammonia, water, ADG and DEG are removed by distillation and the resulting stream comprising MO and MOE is supplied to a distillation column Kin which at a top pressure of from 20 to 2000 mbar MO, MOE and organic products having a boiling point 128&#xb0; C. (1.013 bar) are removed via the bottom and organic products having a boiling point 128&#xb0; C. are removed overhead, and also MO is removed via a side draw, where Kis equipped with an evaporator for heating the bottoms, into which is fed heating vapor having a pressure of from 1 to 10 bar.

Method for the continuous separation by distillation of mixtures that contain morpholine (MO), monoaminodiglycol (ADG), ammonia, water and methoxyethanol (MOE)

A process for the depletion of 2-methoxyethanol (MOE) from a mixture comprising predominantly morpholine (MO) (crude morpholine), wherein crude morpholine is distilled in a distillation column in the presence of an alkali metal compound of the general formula M[RO] (Mis alkali metal cation and R is hydrogen (H), methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, sec-butyl or tert-butyl), where MO and a compound of the general formula R&#x2014;OH are distilled off and an alkali metal methoxyethoxide of the general formula M[MeOEtO] is obtained in the bottom of the column.

Method for depleting 2-methoxyethanol (MOE)

A process for preparing cycloaliphatic amines by hydrogenating the corresponding aromatic compounds with hydrogen-comprising gas at a temperature of from 30 to 280&#xb0; C. and a pressure of 50-350 bar, in the presence of ruthenium catalysts. The hydrogenation is performed in the presence of from 1% by weight to 500% by weight, based on the catalyst calculated as elemental ruthenium (Ru), of suspended inorganic additives, and to the use of the cycloaliphatic amines as a synthesis unit.

Process for preparing cycloaliphatic amines

The present invention relates to a method of continuously conveying a liquid which is used as starting material in a chemical reaction by means of a displacement pump having physically separate forward-transport valves and a liquid-filled bidirectional flow line between displacement pump and forward-transport valves, wherein an auxiliary liquid which is a product or a starting material of the chemical reaction and has a melting point which is below the melting point or below the saturation temperature of the liquid to be conveyed is present in the bidirectional flow line. The present invention additionally provides for the use of a product formed by hydrogenation of an aromatic compound as auxiliary liquid for conveying an aromatic compound and also the use of an alcohol or an ester derived from alcohol and carboxylic acid as auxiliary liquid for conveying carboxylic acids or carboxylic acid derivatives.

Method of conveying liquids

The present invention provides a composition which comprises at least one epoxy resin and a mixture comprising the 7 stereoisomers of diaminomethylcyclohexane in very specific ratios relative to one another, a process for preparing the composition, the use of the composition for producing hardened epoxides, adhesives, composite materials and moldings, a mixture comprising the 7 stereoisomers of diaminomethylcyclohexane in the specific ratios, and the use of this mixture for producing the composition.

Use of a stereoisomer mixture of diaminomethylcyclohexane as a hardener for epoxy resins

A process is proposed for preparing isocyanates by thermally cleaving carbamates to obtain a carbamate cleavage gas comprising the corresponding isocyanate and the corresponding alcohol, which comprises quenching the carbamate cleavage gas in the presence of an ether which functions as an inhibitor for the reverse reaction of the isocyanate with the alcohol.

Process for preparing isocyanates by thermally cleaving carbamates

The invention relates to a process for preparing aromatic diisocyanates by reaction of phosgene with diamines in the gas phase, in which the reaction is carried out in a reaction zone at moderate pressures, i.e. the pressure in this reaction zone is more than 3 bar and less than 20 bar.

Moderate-pressure gas phase phosgenation

The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.

Production of isocyanates in the gaseous phase

Preparation of primary and secondary amines from nitriles

The present invention relates to a process for the dissociation of allophanates, in which a thermal dissociation is carried out in a reaction vessel and the gaseous dissociation products obtained are removed from the reaction vessel using an inert carrier gas or the vapor of a liquid as stripping medium and are condensed.

Thermal dissociation of allophanates

Preparation of secondary amines from primary amines

Method for producing highly pure lithium salts

In a process for preparing mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced content of chlorinated by-products and a reduced iodine color number by two-stage reaction of the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, separation of the excess phosgene and solvent after the phosgenation is complete and thermal treatment of the reaction product, the mass ratios of phosgene to hydrogen chloride in the residence time apparatus of the second stage of the phosgenation are at the same time 10-30:1 in the liquid phase and 1-10:1 in the gas phase.

METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX

Preparation of secondary amines from nitriles

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Ludwigshafen, Germany

Joachim Pfeffinger