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Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang: (Fr) Procede de preparation d’acide acrylique a partir de glycerol, (En) Method for producing acrylic acid from glycerol. Arkema France, Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang, BONNEL Claudine, November 2, 2006: WO/2006/114506 (25 worldwide citation)

(EN) The invention relates to a method for producing acrylic acid in one step by an oxydehydration reaction of glycerol in the presence of molecular oxygen. The reaction is preferably carried out in gaseous phase in the presence of a suitable catalyst.(FR) La présente invention concerne un procédé d ...


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Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang, Kervennal Jacques: Process for dehydrating glycerol to acrolein. Arkema France, Dubois Jean Luc, Duquenne Christophe, Hölderich Wolfgang, Kervennal Jacques, BONNEL Claudine, August 24, 2006: WO/2006/087084 (14 worldwide citation)

The present invention relates to a process for manufacturing acrolein by gas-phase dehydration of glycerol in the presence of strongly acidic solid catalysts with a Hammett acidity H0 of between -9 and -18 and preferably between -10 and -16.


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Bonrath Werner, Eckhardt Jean Francois, Eggersdorfer Manfred L, Hinze Ramona, Hölderich Wolfgang F: New reaction with primary allylic alcohols. Dsm Ip Assets, Bonrath Werner, Eckhardt Jean Francois, Eggersdorfer Manfred L, Hinze Ramona, Hölderich Wolfgang F, PRESSNER Dietmar, August 21, 2008: WO/2008/098774 (4 worldwide citation)

The invention relates to a process of reacting a primary allylic alcohol with a compound containing a) a metal selected from the group consisting of Ag, Au, Ce, Mn, Ni, Ru, Re, Zn and Co preferably Ag and b) an oxidant like TEMPO (2,2',6,6'-tetra-methylpiperidin- 1-oxyl) or its derivates and c) a co ...


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Kief Horst, Hölderich Wolfgang F: Glyoxal as fuel additive. Kief Horst, Hölderich Wolfgang F, GRUSSDORF Jürgen, March 30, 2000: WO/2000/017290

Glyoxal in an aqueous solution is used in a fuel additive in order to reduce pollutants in the exhaust gases of gasoline and diesel engines. It is sufficient to add glyoxal in aqueous solution to gasoline in the dilution in the ratio of 1:1.000 to 1:20.000 and higher in order to obtain a reduction o ...


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Hölderich Wolfgang, Sachtler Wolfgang, Buhl Dieter, Weyrich Peter: (De) Verfahren zur herstellung von alkylbenzolen, (En) Method for producing alkylbenzenes. Aventis Research & Technologies & Co Kg, Hölderich Wolfgang, Sachtler Wolfgang, Buhl Dieter, Weyrich Peter, June 18, 1998: WO/1998/025873

(EN) The invention relates to a method for producing an alkylbenzene from alkyl-, alkylidene- or alkenylcyclohexenes, alkyl- or alkenylcyclohexadienes and their compounds, or from cineoles or turpentine oils, by reaction in the presence of a catalyzer, which is characterized in that one applies, as ...


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Hölderich Wolfgang, Wissler Monika Cornelia: (De) Verfahren zur synthese von cumarin und seinen derivaten, (En) Method for synthesizing coumarin and the derivatives thereof. Grünenthal, Hölderich Wolfgang, Wissler Monika Cornelia, January 8, 2004: WO/2004/002980

(EN) The invention relates to an environmentally friendly, heterocatalytic method for synthesizing coumarins based on phenols and carboxylic acids/carboxylic acid derivatives or ß-keto carboxylic acids/carboxylic acid derivatives. Alkylation of the aromatic phenol ring is assisted by an additional f ...


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