Basf Se Corporation

Andreas Lanver

Ulrich Mueller

Klaus Ebel

Ralf Pelzer

Stefan Rüdenauer

Rainer Klopsch

Ulrich Griesbach

Karl Beck

Thomas Fenlon

Jörg Botzem

Andrei-Nicolae Parvulescu

Ellen Dahlhoff

Helmut Kronemayer

Sumana Chaturvedula

Ulrich Müller

Aaron Flores-Figueroa

Verena Mormul

Volker Hickmann

Miran Yu

Christina Haaf

Mathieu Blanchot

Martine Weis

Marta Porta Garcia

Christian Sowa

Achim Kaffee

Olaf Kutzki

Christina Haaf-Kleinhubbert

A process for preparing an arylpropene from a diarylpropane by gas phase thermolysis in the presence of solid porous catalyst comprising silica having large pore volume and low acidity.

Process for preparing an arylpropene

A process for preparing an arylpropene from a diarylpropane by gas phase thermolysis in the presence of boron containing zeolitic material comprising a membered ring (MR) pore system greater than 10 MR.

Coating compositions comprising a compound having at least two cyclic carbonate groups and a siloxane group (called 'carbonate compound').

Coating compositions comprising a compound with at least two cyclic carbonate groups and a siloxane group

The present invention relates to a process for preparing arylpropenes, especially 1-methoxy-4-(1-propenyl)benzene (anethole), by means of thermolysis of the corresponding 1,1-diarylpropanes.

Method for producing arylpropenes

Polymerizable alkylidene-1,3-dioxolan-2-one monomers, a process for preparation of polymerizable alkylidene-1,3-dioxolan-2-one monomers, and the use thereof for preparation of polymers. The invention also relates to the homopolymers and copolymers obtained by homopolymerization or copolymerization of alkylidene-1,3-dioxolan-2-one monomers and to the use thereof as a component in 2K binder compositions.

Polymerizable alkylidene-1,3-dioxolane-2-one and use thereof

The present invention relates to the use of cyclic carbonates of the formula I or a mixture thereof in epoxy resin compositions and also to epoxy resin compositions which comprise such cyclic carbonates. 

Use of cyclic carbonates in epoxy resin compositions

The invention relates to a process for the preparation of m- or p-substituted phenylalkanols of the formula (I) in which Ris bonded to the phenyl ring in the m- or p-position and is C-C-alkyl, and R, R, Rand R, independently of one another, are hydrogen or methyl, wherein an unsubstituted phenylalkanol of the formula (II) in which R, R, Rand Rhave the meanings given under formula (I) is alkylated together with a C-C-alkyl halide of the formula (III)R-Hal&#x2003;&#x2003;(III),in which Rhas the meaning given under formula (I) and Hal is halogen, in the presence of a Friedel-Crafts catalyst to give an m- or p-alkyl-substituted phenylalkanol of the formula (I), then the reaction mixture is worked-up and the desired m- or p-alkyl-substituted phenylalkanol of the formula (I) is separated off, the other formed by-products are returned to the reaction mixture and these are isomerized in the presence of a Friedel-Crafts catalyst to give the desired m- or p-alkyl-substituted phenylalkanol. From the m- or p-alkyl-substituted phenylalkanols of the formula (I), it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which play an interesting role as fragrances and aroma chemicals.

Process for preparing M- or P-substituted phenylalkanols by alkylation

The invention relates to a process for the preparation of m-substituted phenylalkanols of the formula (I) in which Ris C-C-alkyl and R, R, Rand R, independently of one another, are hydrogen or methyl, wherein a p-substituted phenylalkanol of the formula (II) in which R, R, R, Rand Rhaving the meanings given under formula (I), is isomerized in the presence of a Friedel-Crafts catalyst to give an m-substituted phenylalkanol of the formula (I). From the m-substituted phenylalkanols of the formula (I) it is possible to form, by oxidation or dehydrogenation, as products of value, the corresponding aldehydes, which are known as fragrances and aroma chemicals.

Method for producing M-substituted phenylalkanols by means of isomerization

In a process for preparing carboxylic esters by transesterification, a first feed stream comprising a first carboxylic ester, e.g. methyl formate, is introduced laterally into a reaction column at least one first feed point located between top and bottom of the reaction column and a second feed stream comprising a first alcohol, e.g. ethanol, is introduced laterally into the reaction column at a second feed point located above the first feed point and are reacted in a reaction zone of the reaction column to form a second carboxylic ester and a second alcohol. The first alcohol has a higher molecular weight than the second alcohol. A product fraction comprising the second carboxylic ester and unreacted first carboxylic ester is taken off at an offtake point located above the second feed point. At the bottom of the reaction column, a bottom fraction comprising the second alcohol and unreacted first alcohol is taken off. The product fraction is separated by distillation at a pressure which is different from the pressure in the reaction column into second carboxylic ester and a fraction comprising unreacted first carboxylic ester and the fraction comprising unreacted first carboxylic ester is at least partly recirculated to the reaction zone.

Process for preparing carboxylic esters by reactive distillation

In a process for purifying carboxylic esters such as ethyl formate, a carboxylic ester to be purified is distilled in the presence of an extractant, preferably by (a) allowing vapor of the carboxylic ester to be purified to ascend in a distillation column; (b) conveying the extractant in countercurrent to the vapor in an extractive distillation column; (c) taking off pure carboxylic ester above the extractive distillation zone. The extractant is, for example, selected from among diols, polyols, open-chain or cyclic amides.

Purification of carboxylic esters by extractive distillation

The invention relates to a process for the preparation of m-substituted alkyltoluenes of the formula (I) in which Ris C-C-alkyl, wherein a p-substituted alkyltoluene of the formula (II) in which Rhas the meaning given under formula (I), is isomerized in the presence of ionic liquids to give an m-substituted alkyltoluene of the formula (I). The m-substituted alkyltoluenes obtainable according to the invention are starting compounds for the preparation of fragrances and aroma substances.

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Mannheim, Germany

Andreas Lanver