催化温度滴定法测定石油及石油产品酸值的影响因素  

AFFECTING FACTORS OF ACID NUMBER DETERMINATION OF PETROLEUM AND PETROLEUM PRODUCTS BY CATALYTIC THERMOMETRIC TITRATION

作　　者：杨孟智 蔺玉贵[1] 史军歌[1] Yang Mengzhi;Lin Yugui;Shi Junge(SINOPEC Research Institute of Petroleum Processing,Beijing 100083)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2021年第12期96-101,共6页Petroleum Processing and Petrochemicals

摘　　要：采用催化温度滴定法对石油及石油产品的酸值进行测定,考察了可能影响其测试结果的各种因素,包括催化指示剂多聚甲醛的粒径和用量、滴定速率、过滤因子、溶剂空白值、环境温度等。结果表明:当多聚甲醛的粒径小于75μm、滴定速率为2 mL/min、过滤因子为45时,在考虑溶剂空白值的情况下可以获得较好的数据精确度;测试环境温度与多聚甲醛的用量对滴定分析结果影响较小。另外,鉴于目前使用的溶剂空白值测定方法繁琐且耗时长,开发了一种简便易行的溶剂空白值测定方法。Acid number of petroleum and petroleum products was determined by catalytic thermometric titration,and various factors that might affect the test results were investigated,including particle size of paraformaldehyde,amount of paraformaldehyde,titration rate,filter factor,ambient temperature,solvent blank and so on.The results show that when particle size of paraformaldehyde is less than 75μm,titration rate is 2 mL/min,filter factor is 45,the data precision is better when the blank value of solvent is taken into account.The environmental temperature and amount of paraformaldehyde have little influence on the results of titration analysis.In addition,a simple and feasible method for determine solvent blank value was developed.

关 键 词：催化温度滴定法 酸值 石油产品 多聚甲醛 

分 类 号：O65[理学—分析化学]