Basf Aktiengesellschaft

Basf Se Corporation

Basfaktiengesellschaft

Detlef Kratz

Gerhard Schulz

Michael Hesse

Achim Stammer

Matthias Dernbach

Tom Witzel

Marc Walter

Andreas Henne

Roman Dostalek

Joachim Simon

Manfred Sauerwald

Cristina Freire Erdbrugger

Harald Rust

Frank-Friedrich Pape

Roland Krokoszinski

Ulrich Kohler

Hans Jochen Mercker

Rolf Hartmuth Fischer

Franz Merger

Rolf Pinkos

Rainer Becker

Dieter Hannu Boeckh

Hans-Josef Sterzel

Boris Breitscheidel

Matthias Kroner

Johannes Perner

Guido Voit

Frank Funke

Christoph Sigwart

Peter Schwab

Matthias Irgang

Michael Koch

Arthur Hohn

J&ouml;rg Breitenbach

Siegfried Lang

Martin Schmidt-Radde

Mathias Haake

Herbert Vogel

Ferdinand Lippert

Herbert Exner

Gerald Meyer

Uwe Pressler

Arnold Wittwer

Eckehard Danz

Rolf Lebkucher

Martin Schafer

Heinz Lingk

Cristina Freire Erdbr&uuml;gger

Rudolf Bazner

Martin Bruderm&uuml;ller

Siegmar Maassen

Martin Brudermuller

Brudermuller

Volker Helf

Process for the treatment of wastewater from an aldolization process which is contaminated with water-soluble and/or dispersed organic impurities by means of single-stage or multistage extraction with an organic liquid of the aldolization process wastewater which has been set to a pH of from 0 to 6, in which an organic liquid obtained by stripping of the acidified aldolization process wastewater or of the acidified and extracted aldolization process wastewater, condensation of the stripped compounds and phase separation of the condensate is used as extractant for the extraction of organic impurities from the acidified aldolization process wastewater and wastewater having a lower content of organic impurities than the aldolization process wastewater fed to the extraction is taken off from the stripping apparatus.

Process for the treatment of wastewater from aldolization processes

Formaldehyde is removed by distillation from reaction solutions containing a methlolated alkanal which was obtained from the reaction of formaldehyde with an alkanal which has at least one acidic hydrogen atom &agr; to the carbonyl function or from the reaction of a 2-alkylacrolein or acrolein with water and formaldehyde, by a process in which this reaction was carried out in the presence of catalytic amounts of organic amine. The process permits the improved removal of formaldehyde from the reaction mixture and furthermore facilitates the hydrogenation of the alkanals thus obtained to give polyols.

Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation

Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation

A process for greatly improving the color index of polyhydric alcohols, especially trimethylolpropane, by hydrogenation comprises using, in the hydrogenation, an alcohol which has already been purified by distillation. The catalysts used are those conventionally employed in hydrogenations, preferably copper, nickel, palladium or ruthenium catalysts.

Color number improvement in polyhydric alcohols by hydrogenation

A process is provided for increasing the yield in the preparation of polyhydric alcohols obtained from methylolated alkanals by hydrogenation, wherein derivatives of these alcohols are decomposed by adding 5 ppm to 1% by weight, preferably 100 to 1000 ppm, of a suitable acid to an anhydrous mixture containing these derivatives, heating the mixture to temperatures of 100 to 300&deg; C. and then separating off the polyhydric alcohol by distillation. This process makes it possible simply and efficiently to decompose compounds which boil above the polyhydric alcohol and are unwanted by-products of its synthesis.

Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols

The present invention relates to a 1,3-bis-(N-lactamyl)propane of general formula (I), wherein radicals R , R , R , R , R and R independently stand for hydrogen, alkyl, cycloalkyl, aryl or aralkyl and at least one of said radicals does not stand for hydrogen, (NLac) and (NLac&prime;) are the same or different and stand for N-lactamyl radicals. The invention also relates to the use of said substances as a solvent in pharmaceutical and cosmetic agents. Disclosed are novel compounds of formula (I), wherein R and methyl and R -R stand for hydrogen.

1,3-bis-(N-lactamyl) propane and the pharmaceutical and cosmetic use thereof

A process for the catalytic hydrogenation of a carbonyl compound or of a mixture of two or more carbonyl compounds in the presence of a catalyst which comprises an inorganic support containing TiO , and as active component copper or a mixture of copper and at least one of the metals selected from the group of zinc, aluminum, cerium, a noble metal and a group VIII metal, wherein the copper surface area does not exceed 10 m /g.

Method for hydrogenating carbonyl compounds

Preparation of 1,3-diols

Formic ester is transesterified with a hydroxyl-containing compound in the presence of a tertiary amine as transesterification catalyst to form a formic ester which differs from the formic ester used as reactant, and of a hydroxyl-containing compound which is different from the hydroxyl-containing compound used as reactant.

Process for preparing hydroxy-containing compounds from formic acid esters

A carbonyl compound or a mixture of two or more carbonyl compounds is catalytically hydrogenated in the presence of a Raney copper catalyst in the form of nuggets.

Method for the hydrogenation of carbonyl compounds

Alcohols are prepared by the catalytic hydrogenation of the corresponding carbonyl compounds at elevated temperatures and at superatmospheric pressure in the liquid phase by a process in which the catalyst used contains copper on an SiO,-containing carrier in the presence or absence of one or more of the elements magnesium, barium, zinc and chromium.

Preparation of alcohols

Method for producing polyalcohols

Amines are prepared by reacting primary or secondary alcohols, aldehydes or ketones with nitrogen compounds selected from the group consisting of ammonia and primary and secondary amines at elevated temperatures and superatmospheric pressures in the presence of hydrogen and of a catalyst containing copper and oxygen-containing compounds of titanium by a process in which the catalyst is used in the form of moldings which have been prepared with the addition of metallic copper powder.

Preparation of amines

A process for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone in the gas phase in the presence of a copper-containing catalyst, wherein the catalyst contains 4-40% by weight of copper and 0-5% by weight of Na.sub.2 O, based on the total weight of the catalyst, on a carrier consisting of 80-100% by weight of SiO.sub.2 and 0-20% by weight of CaO.

Catalyst for dehydrogenating 1,4-butanediol to .gamma.-butyrolactone

Process for the preparation of polyalcohols

Growing community of inventors

Heidelberg, Germany

Detlef Kratz