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Section:	Main.ORGANIC CHEMICALS.Aliphatics.Carbonate..ACyclic Carbonates.Di-Alkyl Carbonates.Patent.Claims.Claim 1: Urea+1-2C Alkanol Reaction.in pres.: Quat. Ammonium Compd..Catalyst under Pressure & Temp.=.100-250C. Claim 2: Catalyst Select:.TetraMethylAmmonium Carbonate.Etc. Claims 3,4: Ammonia ByProdt..Removed from the Reaction System.Patent Assignees
Code:	55829
Product:	Japan. USA. MT
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