解吸水解废液中微量尿素分析方法讨论

中国石油宁夏石化公司的2套尿素装置先后采用甲醛法滴定分析、二乙酰一肟-氨基硫脲分光光度法、对二甲基氨基苯甲醛分光光度法进行解吸水解废液中微量尿素的分析.简述了上述3种分析方法的原理;对比了3种分析方法的优点和缺点;讨论了废液中的工艺介质对分析效果的影响程度.结果表明:①甲醛法滴定分析抗干扰能力强,是经典的分析方法;②若...

Discussion on Analysis Method of Trace Urea in WasteSolution from Desorption / Hydrolysis

Titration analysis with formaldehyde method,bi-acet mono-oximeamino-thiourea lighting separation power method,p-methyl benzaldehyde lighting separation power method were adopted early or late in the two sets of urea plants of China Petroleum Ningxia Petrochemical Company in order to make analysis of trace urea in waste solution from desorption/hydrolysis.Author has briefly described the principle for the above-mentioned 3 kinds of analytical methods;has compared the advantage and shortage for analytical methods;has discussed the effecting degree of process media in the waste solution on the analytical effect of the 3 kinds of analytical methods.Result indicates： ①Anti-interference capacity of the titration analysis with formaldehyde method is strong,it is the classical analysis method;②If there is no interference substance in the sample,colorimetric analysis method of p-methyl benzaldehyde is the fastest analysis method;③If there is a dispute for the analytical data of the 2 above-mentioned methods,so it can be confirmed by using the bi-acet mono-oxime lighting separation power method.