Wacker Chemie Ag

Peter Schultheiss

Robert Braunsperger

Willibald Dafinger

Marc Eckert

Volker Hoellein

Brigitte Patsch

Friedrich Frank

Michael Angerer

The invention relates to a method for removing oxygen from hydrocarbon-containing gas mixtures, characterized in that a hydrocarbon-containing gas mixture containing 50 vol % of one or more hydrocarbons, 2 to 10 vol % of oxygen, and possibly one or more gases from the group comprising nitrogen, noble gases, hydrogen, carbon dioxide, carbon monoxide, and water is introduced into an isothermally operated reactor, in which the oxygen contained in the hydrocarbon-containing gas mixture is at least partially converted into carbon dioxide and water in the presence of one or more catalysts, wherein the specifications in vol % relate to the total volume of the hydrocarbon-containing gas mixture introduced into the reactor and add up to 100 vol % in total.

Removal of oxygen from hydrocarbon-containing gas mixtures

A carboxylic acid is transvinylated with vinyl ester to give a vinyl ester product and the corresponding acid of the vinyl ester in the presence of a catalyst, at a temperature of 100&#xb0; C. to 170&#xb0; C. and a pressure of 2 bar abs. to 15 bar abs., wherein the vinyl ester, the carboxylic acid and the catalyst are supplied to a reactor, the transvinylation reaction is conducted, and, on the completion of the transvinylation, the vinyl ester product is separated from the reaction mixture by distillation, characterized in that the reaction mixture is decompressed in a decompression vessel, the gaseous phase obtained is condensed and recycled into the reactor without further purification, and the liquid phase obtained is freed of vinyl ester and corresponding acid with a first distillation, and the vinyl ester product is separated from the reaction mixture in a further distillation step.

Process for catalytic transvinylation of carboxylic acids

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Burghausen, Germany

Peter Schultheiss