Versalis S.p.a.

Elena Novello

Maurizio Ghirardini

Laura De Nardo

A process for producing a high-purity dimethyl carbonate, which includes: (I) cooling a commercial grade dimethyl carbonate containing 1 ppm or more of chlorine to a temperature from +6&#xb0; C. to &#x2212;5&#xb0; C. at a rate from 0.5-2&#xb0; C./hour, to obtain a first solid dimethyl carbonate; (II) heating the first solid dimethyl carbonate to a temperature from &#x2212;5&#xb0; C. to +6&#xb0; C. at a rate of 1-5&#xb0; C./hour, to obtain a mixture comprising a second solid dimethyl carbonate and a predetermined amount of a first liquid dimethyl carbonate; (III) separating the first liquid dimethyl carbonate from the mixture, to obtain the second solid dimethyl carbonate; (IV) heating the second solid dimethyl carbonate to a temperature from 20&#xb0; C. to 40&#xb0; C., to obtain a second liquid dimethyl carbonate, wherein the second liquid dimethyl carbonate has a purity degree higher than 99.99% and a chlorine content lower than or equal to 1 ppm.

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Cernusco sul Naviglio, Italy

Elena Novello