酸促进的氨基甲酸酯醇解合成碳酸酯

Several carbonates are synthesized from carbamates either with hydrochloride as coreactant or with zeolites as catalysts under low temperature and pressure, whereas high yield is achieved through either the formation of ammonium chloride as precipitate or the adsorption of ammonia in zeolites. With hydrochloride as coreactant, the yield reaches 58% at 60 ℃, while the highest yield is 19% at 140 ℃ with zeolites as catalysts. Carbonates are considered as environmentally compatible reagents, solvents and gasoline additives, and the new processes may be potential for the substitution of the phosgene routes of pollution hazards.