碱溶-电位滴定法测定重整催化剂中氯含量新标准的建立及应用

Establishment and application of a new standard for determination of chlorine content in reforming catalyst by alkaline solution digestion-potentiometric titration

建立了碱溶-电位滴定法测定重整催化剂中氯含量的方法,对催化剂样品消解条件、方法干扰、方法准确性进行了考察。通过实验,得到方法检测范围为0.60%~1.80%。称取样品的质量为0.15 g左右,采用30 mL质量浓度为30 g/L碱液进行消解,消解温度约为250℃,时间在10 min左右,调节抽提液pH小于7。制定了石化行业测定重整催化剂中氯含量的新标准,并在炼化企业得到应用。

A method is established for the determination of chlorine content in reforming catalyst by alkaline solution digestion-potentiometric titration.The digestion conditions for the catalyst samples,as well as the interference and accuracy of the method are investigated.It is obtained by experiments that the method has a detection range of 0.60%-1.80%.The catalyst sample with a weight of about 0.15 g is digested by 30 mL of alkali lye with a mass concentration of 30 g·L^(-1).The digestion has been carried out at a temperature of about 250℃for about 10 min.The pH of the extract liquid should not be greater than 7.According to this method,a new standard is established for the detection of chlorine content in the reforming catalyst in the petrochemical industry,and is applied in refineries.