The　synthesis　of　diethyl　carbonate　using　dimethyl　carbonate　and　ethanol　and　catalyzed　by　sodium　methoxide　was　studied　experimentally　in　a　batch　stirred　tank　reactor.　The　effects　of　catalyst　dosage,　temperature,　and　molar　ratio　of　ethanol　to　dimethyl　carbonate　on　trans-esterification　were　investigated.　A　kinetic　mathematical　model　was　built　to　describe　the　reaction.　It　is　found　that　the　reaction　consists　two　parts,　and　the　intermediate　product　is　methyl　ethyl　carbonate.　The　reaction　heat　is　(1.595kJ·mol-1　for　the　first　trans-esterification　reaction　and　0.809　kJ·mol-1　for　the　second　one.　Both　of　them　are　reversible.　The　forward　and　reverse　activation　energies　of　the　first　reaction　are　45.633　kJ·mol-1　and　47.228　kJ·mol-1,　respectively,　while　the　second　one　shows　that　of　55.058　kJ·mol-1　and　54.249　kJ·mol-1,　respectively.