Basf Se Corporation

Nawid Kashani-Shirazi

Klaus Ebel

Markus Hansch

Gunnar Heydrich

Thomas Weiss

Wolfgang Krause

Matthias Rauls

Gabriele Gralla

Joachim Schmidt-Leithoff

Muriel Ecormier

Rocco Paciello

Ludwig Voelkel

Marc Walter

Thomas E Hayden

Thomas Weiβ

Steffen Oehlenschläger

Christoph Jäkel

Marko Friedrich

Eike Johannes Bergner

Claudia Fischer

Markus Scherer

Veronika Wloka

Wolfgang Gerlinger

Wolfgang Kollenberg

Ludwig Völkel

Kerstin Heinen

Christoph Jaekel

Christoph Jäkal

Andrea Schmidt

Thomas Weiß

Thomas Hayden

The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method has the following steps

Method for producing optically active, racemic menthol

The use of a polyalkylene glycol of formula HO-(A-O)&#x2014;(CHCH&#x2014;O)-(A-O)&#x2014;H wherein A is a C- to C-alkylene group or a mixture of such alkylene groups, m is a number of from 2 to 100 and p and q are each numbers of from 1 to 100, as an additive in a fuel.

Use of a polyalkylene glycol to reduce fuel consumption

The use of an alkoxylated polytetrahydrofurane of formula wherein m, m', n, n&#x2032;, p, p&#x2032; and k are integers in the range of &#x2265;1, Rdenotes an unsubstituted linear or branched alkyl radical, Rdenotes &#x2014;CH&#x2014;CH, and Rdenotes a hydrogen atom or &#x2014;CH, as an additive in a fuel for reducing fuel consumption in the operation of an internal combustion engine with this fuel. 

Use of an alkoxylated polytetrahydrofuran to reduce fuel consumption

Lubricating oil compositions comprise one or more polytetrahydrofuranes that are prepared by alkoxylating polytetrahydrofurane with at least one C8-C30 epoxy alkane.

Use of polytetrahydrofuranes in lubricating oil compositions

The presently claimed invention is directed to the use of polyethylene glycols that are prepared by alkoxylating polyethylene glycol with at least one C-Cepoxy alkane in lubricating oil compositions.

Use of alkoxylated polyethylene glycols in lubricating oil compositions

Provided are polyalkoxylates that are prepared by alkoxylating polytetrahydrofurane with butylene oxide for use in lubricant compositions and/or for reducing friction in a driveline.

Use of polyalkoxylates in lubricant compositions

The present invention relates to a continuous process for preparing racemic or optically active menthol in pure or enriched form by distillatively separating menthol from substance mixtures which comprise essentially menthol and diastereomers thereof. This distillatiive separation is performed in a dividing wall column with 50 to 300 theoretical plates and one or more side draw points at an absolute operating pressure of 5 to 500 mbar.

Continuous process for preparing menthol in pure or enriched form

The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps a) catalytic hydrogenation of neral and/or geranial to give citronellal, b) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c) purification of isopulegol by crystallization and d) catalytic hydrogenation of isopulegol to give menthol.

The present invention relates to a continuous process for preparing neral (cis-citral) in pure or enriched form by distillatively separating neral from substance mixtures comprising essentially neral and geranial (trans-citral). This distillative separation is performed in a dividing wall column or in a connection of two distillation columns in the form of a thermal coupling.

Continuous process for preparing neral in pure or enriched form

Shaped bodies having catalytic properties which can be obtained by a process comprising the steps:

Use of shaped bodies having catalytic properties as reactor internals

The present invention relates to a process for preparing enriched isopulegol by crystallization from a melt comprising isopulegol. The invention relates specifically to a process for preparing enantiomerically enriched n-isopulegol proceeding from optically active isopulegol having a relatively low enantiomeric excess by crystallization from the melt. The invention further relates to a process for preparing menthol proceeding from enantiomerically and/or diastereomerically enriched n-isopulegol prepared by crystallization from the melt.

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Mannheim, Germany

Nawid Kashani-Shirazi