Basf Aktiengesellschaft

Basf Se Corporation

Markus Rösch

Rolf-Hartmuth Fischer

Alexander Weck

Holger Borchert

Stephan Schlitter

Michael Hesse

Nils Bottke

Gunther Windecker

Markus Schubert

Gunnar Heydrich

Ralf-Thomas Rahn

Frank Stein

Rolf Pinkos

Reinhold J Leyrer

Marcus Guzmann

Klaus Harth

Norbert Götz

Thomas Ostrowski

Heiko Urtel

Roland Reichenbach-Klinke

Michael Steiniger

Stefan Friedrich

Björn Langlotz

Andrea Haunert

Kati Schmidt

Olga Schubert

Henrik Junicke

Manfred Schuhbeck

Thomas Pfeuffer

Peter Gaeberlein

Thomas Nöbel

Sylvia Huber-Dirr

Yulia Fogel

Sabine Borchers

Andrea Orleans

Jochen Pfeifer

Water-soluble, hydrophobically associating copolymers which comprise new types of hydrophobically associating monomers. The monomers comprise an ethylenically unsaturated group and a polyether group with block structure comprising a hydrophilic polyalkylene oxide block which consists essentially of ethylene oxide groups, and a terminal, hydrophobic polyalkylene oxide block which consists of alkylene oxides with at least 4, preferably at least 5 carbon atoms.

Hydrophobically associating copolymers

The invention relates to a method of controlling a hydrogenation of a starting material in a hydrogenation reactor, in which the amount of hydrogen reacted in the hydrogenation is firstly determined, the ratio of the amount of hydrogen reacted to the amount of starting material fed in is then derived, this ratio is compared with a prescribed value and, finally, at least one process parameter is altered if the ratio of the amount of hydrogen reacted to the amount of starting material fed in deviates by a prescribed amount from the prescribed value.

Method for controlling hydrogenation

The present invention relates to a process for preparing optically active hydroxy-, alkoxy-, amino-, alkyl-, aryl- or chlorine-substituted alcohols or hydroxy carboxylic acids having from 3 to 25 carbon atoms or their acid derivatives or cyclization products by hydrogenating the correspondingly substituted optically active mono- or dicarboxylic acids or their acid derivatives in the presence of a catalyst whose active component consists of rhenium or of rhenium and comprises at least one further element having an atomic number of from 22 to 83, with the provisos that

Method for producing optically active alcohols or carboxylic acids

Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

Method for purifying tetrahydrofuran by distillation

A catalyst for the hydrogenation of C-dicarboxylic acids and/or derivatives thereof, preferably maleic anhydride, in the gas phase comprises

Method for the selective production of tetrahydrofuran by hydrogenating maleic acid anhydride

Optionally alkyl-substituted 1,4-butanediol is prepared from C-dicarboxylic acids and/or of derivatives thereof by: The catalysts employed in each of the hydrogenation stages comprise &#x2266;95% by weight of CuO, and &#x2266;5% by weight of an oxidic support, and the second reactor has a higher pressure than the first reactor.

Two-stage method for producing butanediol with intermediated separation of succinic anhydride

A process for preparing toluene derivatives of the formula I, where R, Rand Rindependently of one another are hydrogen, halogen, C&#x2013;C-alkyl, hydroxyl or C&#x2013;C-alkoxy, by hydrogenating benzaldehydes and/or benzyl alcohols of the formula II, with hydrogen in the presence of a catalyst, which is described in more detail in the description.

Method for producing toluol derivatives

A catalyst for the hydrogenation of C-dicarboxylic acids and/or their derivatives, preferably maleic anhydride, in the gas phase comprises from 5 to 100% by weight, preferably from 40 to 90% by weight, of copper oxide and from 0 to 95% by weight, preferably from 10 to 60% by weight, of one or more metals or compounds thereof selected from the group consisting of Al, Si, Zn, Pd, La, Ce, the elements of groups III A to VIII A and groups I A and II A as active composition applied in the form of a thin layer to an inert support material.

Catalytic coating for the hydrogenation of maleic anhydride and related compounds to give &#x3b3;-butyrolactone, tetrahydrofuran and derivatives thereof

A process for coproducing alkyl-substituted or unsubstituted THF and pyrrolidones by catalytically hydrogenating C4-dicarboxylic acids and/or derivatives thereof in the gas phase in the presence of copper catalysts and reacting GBL with ammonia or primary amines to give pyrrolidones.

Method for the simultaneous production of tetrahydrofurans and pyrrolidones

The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C-dicarboxylic acids and/or of derivatives thereof having the following steps:

Method for the production of 1,4- butane-diol by combined gas-phase and liquid-phase hydrogenation

Method for the production of 1,4- butanediol

A process for preparing toluene derivatives of the formula Iwhere R, Rand Rare, independently of one another, hydrogen, alkyl radicals, hydroxyl groups and/or alkoxy groups, comprises reacting the corresponding benzoic acids, benzoic esters or benzoic anhydrides with hydrogen in the presence of a catalyst.

Single-stage method for producing toluene derivatives

C-dicarboxylic acids or derivatives thereof are hydrogenated in the gas phase in a fluidized-bed reactor. It is possible to use catalyst compositions known per se.

Method for the hydrogenation of maleic anhydride and related compounds in a fluid bed reactor

A hydrogenation catalyst which is suitable, in particular, for the hydrogenation of maleic anhydride and its derivatives to THF or its derivatives comprises copper oxide and at least one further metal or compound thereof, preferably an oxide, selected from the group consisting of Al, Si, Zn, La, Ce, the elements of groups IIIA to VIIIA and the elements of groups IA and IIA and having a pore volume of &#x2267;0.01 ml/g for pore diameters of &#x3e;50 nm and a ratio of the pore volume of macropores having a diameter of &#x3e;50 nm to the total pore volume for pores having a diameter of &#x3e;4 nm of &#x3e;10%.

Porous catalyst for the hydrogenation of maleic anhydride to tetrahydrofuran

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Oppenheim, Germany

Markus Rösch