三聚氰酸制备方法综述

Review of preparation methods of pyrouric acid

随着生态文明建设的推进,国内对绿色环保的要求也越来越高。三聚氰酸作为一种重要的化工中间体,其传统制备方法存在环境污染等问题,研究和推广应用新兴制备方法迫在眉睫。系统综述了三聚氰酸制备中固相法和液相法的工艺过程及特点,指出了传统制备方法存在操作环境恶劣、能耗较高和环保不达标等问题,并对其发展前景进行了展望。指出今后可以在以下方面对三聚氰酸的制备开展深入研究:1)开展回转窑及流化床技术装备研究,逐步取代隧道窑,实现技术装备的升级改造,克服传统固相法的缺点;2)深入探索液相法溶剂体系的筛选及回收套用问题,加强液相法小试技术的研究及中试放大研究,为实现工业化生产提供理论基础;3)对新兴制备方法原料的来源、产品收率及生产成本问题进行系统、深入研究,以期实现规模化生产。

With the advance of ecological civilization construction,the domestic demand for green environmental protection is also higher and higher.As an important chemical intermediate,the traditional preparation method of pyrouric acid has some problems such as environmental pollution,so it is urgent to study and popularize the new preparation method.The process and characteristics of solid phase and liquid phase methods for the preparation of pyrouric acid were systematically reviewed.The problems of traditional preparation methods such as bad operating environment,high energy consumption and not up to the standard of environmental protection were elucidated.The development prospect of preparation methods of pyrouric acid was also prospected.It is pointed out that further research on the preparation of pyrouric acid can be carried out in the following aspects.1)It is necessary to carry out research on rotary kiln and fluidized bed equipment,gradually replace tunnel kiln,realize the upgrading of technical equipment,and overcome the shortcomings of traditional solid phase method;2)In order to lay a foundation for industrial production,the selection and recovery of solvent system in liquid phase method should be deeply explored,and the research of liquid phase method in small scale and scale up in pilot scale should be strengthened;3)The raw material source,product yield and production cost of the new preparation method should be systematically and deeply studied in order to realize large-scale production.