Patent Number: 6,169,197

Title: Process for separation between dialkyl carbonate and alkyl carbamate

Abstract: A process for separation between dialkyl carbonate and alkyl carbamate which comprises adding an aromatic hydroxy compound to a liquid comprising alkyl carbamate having an alkyl group having 3 to 6 carbon atoms and dialkyl carbonate having alkyl group having 3 to 6 carbon atoms to obtain a mixed liquid, and distilling the mixed liquid thus obtained in a distillation column to obtain a mixture comprising the dialkyl carbonate and the aromatic hydroxy compound from a top section of the distillation column and a liquid comprising the alkyl carbamate from a bottom section of the distillation column.

Inventors: Ohshida; Takuo (Tsukuba, JP), Ohgi; Hiroaki (Tsukuba, JP), Arai; Yoshihisa (Tsukuba, JP), Mizukami; Masamichi (Tsukuba, JP)

Assignee: Mitsubishi Gas Chemical Company, Inc.

International Classification: C07C 68/00 (20060101); C07C 68/08 (20060101); C07C 068/08 (); C07C 068/06 ()

Expiration Date: 01/02/2018