Covestro Deutschland Ag

Bayer Materialscience Ag

Carsten Buchaly

Pieter Ooms

Johan Vanden Eynde

Georg Ronge

Ricarda Leiberich

Karl-Heinz Köhler

Andre Düx

Friedhelm Risse

Thomas Pancur

Wim Wuytack

Korbinian Krämer

Arthur Susanto

Ralph Schellen

Ronge Georg

The present invention relates to a continuous process for producing lower dialkyl carbonates as a main product and alkylene glycol as a by-product by transesterification of a cyclic alkylene carbonate (e.g. ethylene or propylene carbonate) with lower alkyl alcohols in the presence of a catalyst and also the necessary purification of the dialkyl carbonate in a subsequent process step. For optimization of the economic efficiency and energy efficiency of the process, additional devices are used for intermediate heating of the internal liquid streams within the apparatus.

Process for producing dialkyl carbonates

The present invention relates to a continuous process for preparing lower dialkyl carbonates as main product and alkylene glycol as by-product by transesterification of a cyclic alkylene carbonate (e.g. ethylene carbonate or propylene carbonate) with lower alkyl alcohols in the presence of a catalyst and also the required purification of the dialkyl carbonate in a subsequent process step. To optimize the economics and energy efficiency of the process, additional devices are used for intermediate heating of the liquid streams in the apparatus.

Process for preparing dialkyl carbonates

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Düsseldorf, Germany

Carsten Buchaly