Basf Aktiengesellschaft

Basf Se Corporation

Stephan Schlitter

Michael Hesse

Alexander Weck

Rolf-Hartmuth Fischer

Holger Borchert

Rolf Pinkos

Markus Rösch

Gunther Windecker

Nils Bottke

Steffen Maas

Stefan Rittinger

Martin Haubner

Michael Steiniger

Ralf-Thomas Rahn

Markus Schubert

Gunnar Heydrich

Frank Stein

Tilman Sirch

Christoph Sigwart

Olga Schubert

Stefan Käshammer

Markus Roesch

Guenter Scherr

Heiko Urtel

Stephan Hatscher

Klaus-Peter Pfaff

Dieter Rodewald

Felix Alexander Westerhaus

Todd C Spengeman

Sabine Borchers

Markus R&ouml;sch

Gerd Kaibel

Peter Zehner

Ortmund Lang

Michael Koch

Thorsten Johann

Volkmar Menger

Michael Jolyon Sprague

Henrik Junicke

Miran Yu

Peter Groll

Maria Guixa Guardia

Olivier Fleischel

Ulrich Abel

Frank Reuter

Fritz Nimtz

Jeffrey T Andress

Achim Gerstlauer

Stefan Kaeshammer

Martin Voelkert

Thomas Graβler

Timan Sirch

Maria Guixa

Walter Dörflinger

Process for the removal of volatile compounds from a tackifier comprising a resin with repeating units of formula I wherein Ris a linear or branched alkylen group with 1 to 10 carbon atoms and Ris a linear or branched, saturated or unsaturated N aliphatic hydrocarbon group with up to 20 carbon atoms, and optionally a plasticizer, wherein the tackifier is passed through at least one evaporator as film and the volatile compounds are removed from the film. 

Process for removal of volatile compounds from tackifiers

A tackifier comprising a resin with repeating units of formula (I) wherein Ris a linear or branched alkylen group with 1 to 10 carbon atoms and Ris a linear or branched, saturated or unsaturated aliphatic hydrocarbon group with up to 20 carbon atoms and a non-aromatic compound which consists to at least 50% by weight of one or more linear or branched, saturated or unsaturated aliphatic hydrocarbon groups with at least 4 carbon atoms. 

Tackifier for rubber compositions

A process is provided for recovering components from a low boiler mixture which is obtained in the distillation of hydrogenation effluents from the preparation of polymethylols, by multistage distillation of the low boiler mixture having a tertiary amine, water, methanol, a polymethylol, a methylolalkanal, an alcohol and an alkanal with a methylene group in the alpha position to the carbonyl group. A first distillation stage involves separating the low boiler mixture into a higher-boiling, predominantly water-rich fraction and into a lower-boiling aqueous organic fraction having the tertiary amine. A second distillation stage involves separating the aqueous organic fraction from the first distillation stage into a predominantly amine-containing fraction and a further amine-depleted fraction. The tertiary amine is trimethylamine or triethylamine and the bottom temperature in the second distillation stage is at least 110&#xb0; C.

Process for preparing polymethylols

The present invention relates to a process for distilling an aqueous polymethylol mixture which comprises a polymethylol of the formula (I)(HOCH)&#x2014;C&#x2014;R&#x2003;&#x2003;(I)in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a tertiary amine, water and the adduct of tertiary amine and formic acid (amine formate), which comprises performing the distillation in a distillation column which is connected at the bottom to an evaporator, the bottom temperature being above the evaporation temperature of the monoester of formic acid and polymethylol (polymethylol formate) which forms during distillation. The present invention further relates to a composition comprising polymethylol and 1 to 10 000 ppm by weight of polymethylol formate, and to the use thereof.

Method for preparing polymethylols

Carbon monoxide is removed from streams by adsorption on an adsorption composition which comprises copper, zinc and zirconium oxides and whose copper-comprising component has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 45% and not more than 75%.

Adsorption composition and process for removal of CO from material streams

The invention relates to a catalyst provided in the form of an extrudate, which contains 5 to 85% by weight of copper oxide and comprises, in the active material and as binders, the same oxidic carrier material. The invention also relates to the use of the catalyst for hydrogenating carbonyl compounds.

Catalyst extrudates based on copper oxide and their use for hydrogenating carbonyl compounds

Adsorption composition and method of removing CO from streams

The preparation of hydroxypivalaldehyde is effected by aldolizing isobutyraldehyde with formaldehyde and subsequently working up the resulting reaction effluent by distillation, wherein the reaction effluent is fed to a distillation column which is operated at a top pressure in the range from 0.5 to 1.5 bar and in which a two-stage condensation is provided in the top region, in which the vapors are first conducted into a partial condenser operated at a temperature in the range from 50 to 80&#xb0; C., whose condensate is recycled at least partly into the distillation column, and in which the vapors uncondensed in the partial condenser are fed to a downstream condenser operated at a temperature in the range from &#x2212;40 to +30&#xb0; C., whose condensate is at least partly discharged.

Method for producing hydroxypivalaldehyde and neopentyl glycol

The present invention relates to a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymer, diester or monoester by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer and of an acidic heterogeneous catalyst based on activated sheet silicates or mixed metal oxides in a fluidized bed.

Method for the polymerization of cyclic ethers

The invention relates to a process for preparing polymethylol compounds of the formula (I) where the radicals R are each, independently of one another, a further methylol group or an alkyl group having from 1 to 22 carbon atoms or an aryl or aralkyl group having from 6 to 22 carbon atoms, by condensation of aldehydes having from 2 to 24 carbon atoms with formaldehyde in an aldol reaction using tertiary amines as catalyst to form alkanals of the formula (II) where the radicals R each independently have one of the abovementioned meanings, and subsequent hydrogenation of the latter. The particular inventive feature of this process is that the aldol reaction is carried out using an aqueous formaldehyde solution having a formic acid content of &#x3c;150 ppm and preferably &#x3c;100 ppm. In this way of carrying out the process, the formation of by-products can advantageously be prevented in a targeted manner and the yield of the desired polymethylol compound can thereby be increased.

Process for preparing polyalcohols from formaldehyde having a low formic acid content

Catalyst in the form of an extrudate which comprises from 5 to 85% by weight of copper oxide and in which the same oxidic support material is present in the active composition and as binder, and the use of the catalyst for the hydrogenation of carbonyl compounds.

The present invention relates to a solid, acid catalyst for the preparation of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which has a BET surface area of at least 160 m/g and an acid center density of at least 0.05 mmol/g for pKvalues of from 1 to 6, to a process for preparing it and to a process for the polymerization of cyclic ethers over this catalyst.

Catalyst, its preparation and the polymerization of cyclic ethers over this catalyst

A process for variably preparing mixtures of optionally alkyl-substituted BDO, GBL and THF by two-stage hydrogenation in the gas phase of Cdicarboxylic acids and/or derivatives thereof, which comprises

Method for the production of defined mixtures of THF, BDO and GBL by gas phase hydrogenation

Process for the catalytic hydrogenation of methylolalkanals of the general formula where Rand Rare each, independently of one another, a further methylol group or an alkyl group having from 1 to 22 carbon atoms or an aryl or aralkyl group having from 6 to 33 carbon atoms, in the liquid phase by means of hydrogen over a hydrogenation catalyst, wherein hydrogen is used in a molar ratio to methylolalkanal of greater than 1.

Hydrogenation of methylolalkanals

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Limburgerhof, Germany

Stephan Schlitter