Study On The Synthesis Of The Three Urea Derivatives

In this paper,three reaction products of urea have been studied:Cyanuric acid,Phthalocyanine blue and biuret.Influnence factors and reaction conditions of the synthesi reaction have been studied from the molar ratio of reactants,reaction temperature and reaction time. By a series of analysis and detection methods,the purity of ptoducts has been verified.1,The reaction that urea was heated by microwave to prepare cyanuric acid was chosen to investigate the effect of the mass ratio of reactants, power of microwave and reaction time on itself, through which came into being the best reaction condition that the mixture of urea and ammonium chloridethe, with the mass ratio of the former to the latter of 36:1, was heated by high power microwave for ten minutes and then refined by boiling in acid solution, with the productive rate of 70%. Industrial amplification reaction carried out the same results with the laboratory small scale, there is the potential for industrial scale.2,The reaction that reactants was heated by microwave to prepare CuPc was chosen to investigate the effect of the mass ratio of reactants, power of microwave and reaction time on itself, through which came into being the best reaction condition that the mixture of urea, phthalic anhydride and CuCl, Ammonium molybdatewith the malor ratio of the former to the latter of 15:5:1.The weight of ammonium molybdate was 15% of phthalic anhydride. Reaction triggered by the high fire,and then heated by high power microwave for 5 minutes.The reaction yield can reach 61.1%,and the product purity 90%.3,The reaction that urea was heated by solven to prepare biuret. The optimum reaction conditions of the reaction:the weight ratio of urea and ethylene glycol dimethyl ether was 1:1,the reaction temperature is 145℃,the time is 3.5h.The yield was 35.6%, and the product purity 64.1%.A new method was proposed to prepare the derivative of urea and simultaneously generate ammonia according to the characteristics of evolution of considerable ammonia in the preparaing of urea derivatives. The reaction of urea derivatives can replace the existing method of preparation of ammonia by ammonia or urea. The technology has solved the risk problem in transportation and storage of liquid ammonia,and the problem of high running costs of the method of urea.