Sabic Innovative Plastics IP B.v.

Sabic Global Technologies B.v.

Mario Perez Collado

Ignacio Vic Fernandez

Vinod Sankaran Nair

Thodla Ramgopal

Benoit Fillion

Vutukuru Murthy

Vijaya Kumar Narasaiah

Thodia Ramgopal

The present invention provides methods of forming dialkyl carbonate wherein catalyst buildup in the reaction equipment, the separation equipment, and transfer lines there between is reduced and even eliminated. In one embodiment, the method includes introducing alkanol, carbon monoxide, oxygen, and a catalyst to a reactor having a gaseous head space and a liquid body space. The reactor is operated under conditions to form dialkyl carbonate and water. A product stream containing dialkyl carbonate, water, and residual reactants is removed from the head space of the reactor and introduced to a cyclone with a flushing stream. A liquid bottom stream is captured from the cyclone and introduced to the reactor. The gaseous top stream contains product dialkyl carbonate.

Process for manufacturing dimethyl carbonate

A method of making a dialkyl carbonate comprises: reacting, in a reactor comprising tantalum, an alkanol, oxygen, and carbon monoxide, in the presence of a catalyst. The reaction occurs in a mixture comprising a liquid phase wherein the liquid phase comprises about 4 to about 12 weight percent water based on the total weight of the liquid phase.

Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates

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Murcia, Spain

Mario Perez Collado