Patent ID: 7074951
Filing Date: 2006-07-11
Classification: C07C

Abstract:
1. A process for the production of dimethyl carbonate comprising the steps of: (a) feeding a stream containing urea, methanol, water and ammonium carbamate to a first reaction/distillation zone: (b) concurrently in said first reaction/distillation zone, (c) removing ammonia, carbon dioxide and methanol from said first reaction/distillation zone as a first overheads; (d) removing urea and methanol from said first reaction/distillation zone as a first bottoms; (e) feeding said first bottoms and methanol to a second reaction/distillation zone; (f) concurrently in said second reaction/distillation zone, (g) removing dimethyl carbonate and methanol from said second reaction/distillation zone as a second overheads; and (h) removing a second bottoms from said second reaction/distillation zone.