Basf Aktiengesellschaft

Basf Se Corporation

Alexander Wartini

Matthias Dernbach

Tilman Sirch

Johann-Peter Melder

Klaus Ebel

Gerd Kaibel

Steffen Maas

Michael Koch

Hagen Weigl

Gerlinde Tischer

Gisela Hieber

Disclosed is a method for the catalytic hydrogenation of methylol alkanals of general formula (I), where Rand Rindependently represent an additional methylol group or an alkyl group having with 1 to 22 carbon atoms, or an alkyl group with 1 to 22 C atoms, or an aryl group or aralkyl group with 6 to 33 carbon atoms, in the liquid phase on a hydrogenation catalyst. The inventive method is characterized in that a pH value ranging between 6.3 and 7.8 is adjusted in the hydrogenation feed by adding at least one tertiary amine 

Method for hydrogenating methylol alkanals

The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture (high-boiling fraction) that is obtained by reprocessing, contains derivatives of said alcohols and has a higher boiling point than the respective alcohol, and the polyvalent alcohol is recovered from the acid-treated high-boiling fraction. The inventive method is characterised in that the water content of the high-boiling fraction amounts to between 20 and 90 wt. % in relation to the entire mixture of the high-boiling fraction and water.

Method for increasing yield in the production of polyvalent alcohols by splitting by-products containing acetal

The invention relates to a method for producing macrocyclic ketones of general formula (I) by direct cyclisation of compounds of general formula (II) in the gas phase on a heterogeneous catalyst. In general formula (I), X represents a monounsaturated or polyunsaturated or saturated C&#x2013;Calkyl radical which can be optionally substituted by a C&#x2013;Calkyl radical, and in general formula (II), R, Rcan respectively be the same or different and represent hydrogen or C&#x2013;Calkyl, and has the above-mentioned designation. 

Method for producing macrocyclic ketones by means of dieckmann codensation in the gas phase

The invention provides a process for preparing polyester polyols of polyhydric alcohols by mono- or polyesterification of at least one carboxylic acid having at least two acid groups and/or at least one derivative of a dicarboxylic acid with polyhydric alcohols, optionally with the addition of a catalyst, while removing the water of reaction, wherein the polyhydric alcohol used has a formaldehyde acetal content of less than 500 ppm.

Method for producing polyesterpolyols of polyvalent alcohols

Trimethylolpropane is isolated from a reaction mixture which has been obtained by reaction of n-butyraldehyde with formaldehyde in the presence of a base and, if appropriate, hydrogenation of the resulting mixture by distilling the mixture by means of a dividing wall column or a distillation column with a precolumn or a distillation column with an after-column. The process has low capital costs and a low energy consumption and gives reduced formation of high-boiling by-products.

Method for the isolation of trimethylolpropane from a reaction mixture

A method for removing trialkyl ammonium formate from a methylol alkanes obtained by condensation of formaldehyde with a higher aldehyde. The invention is characterized in that trialkyl ammonium formate is decomposed at a high temperature using catalysts containing at least one metal from groups 8-12 of the classification of elements in the presence of gas containing hydrogen. The method makes it possible to separate trialkyl ammonium formate according to the organic Cannizzaro method and according to the hydrogenation method.

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Heidelberg, Germany

Alexander Wartini