由成都齐达科技开发公司与四川院合作开发成功碳酸氢铵改产尿素联产三聚氰胺新工艺,已获国家专利,并先后通过四川省化工厅和化工部组织的技术鉴定和评审。 该工艺采用碳酸氢铵制尿素,尿素用于制三聚氰胺。三聚氰胺的尾气又回收制碳酸氢胺,此法较常规碳酸氢铵改产尿素建设项目节省建设投资1/4～1/2,与水溶液全循环法尿素生产相比,产品成本及总能耗较低,而且不需扩建合成氨生产装置,建设周期短。联产三聚氰胺时, By the Chengdu Zida Technology Development Corporation and Sichuan Institute of cooperation in the successful development of ammonium bicarbonate to urea urea production of melamine new technology, has won the national patent, and has passed through the Sichuan Provincial Department of Chemical and Chemical Engineering Organization of the technical appraisal and review. The process uses ammonium bicarbonate urea, urea for the system of melamine. The tail gas of melamine is recycled into the bicarbonate amine. Compared with conventional ammonium bicarbonate conversion urea production project, this method saves construction investment by 1/4 ~ 1/2. Compared with the urea solution produced by the full cycle urea solution, the product cost and total energy consumption Low, but without the need to expand the ammonia plant, the construction period is short. When melamine is produced,