
第46卷第2期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
石油产品酸含量测定标准的有效性研究
黄风林王迪李荣春
西安石油大学石油炼化工程技术研究中心
摘要针对不同馅分石油酸的组成分布,利用基团贡献法对石油酸和酸含量测定标准中醇类、芳香类溶剂的溶解度参数等进行估算,混合溶剂与溶质具有相似的溶解度参数构成是改善测定有效性的基础。应用溶解度参数理论分析了溶质、溶剂、滴定剂间相互关系及对测定结果的影响,在满足国家标准使用基础上,明确了汽油、柴油、润滑油、原油的酸含量测定方法分别用GB/T258一2016、GB/T 4945一2002、GB/T7304一2000、GB/T18609一2011,溶剂与溶质良好互溶,终点确定迅速、准确,酸含量测定更加科学、有效。
关键词酸含量标准溶解度参数非水滴定中图分类号:TE626
文献标志码:A
D0I:10.3969/i.issn.1007-3426.2017.02.018
Studyonthealidityofthestandardfordeterminationof
acidcontentinpetroleumproducts
Huang Fenglin,Wang Di, Li Rongchun
Research Center of Refining and Chemical Technology of Xi'an Shiyou University , Xi' an, Shaanxi, Chind
Abstract : Regarding to petroleum acids distribution in different fraction oils , solubility parameters of petroleum acids and solvents (alcohols, aromatics ) in acid content determining standard were estimated by using the group contribution method, and mixed solvents and solutes with similar solubility parameters are the basis for improving the validity of determination . Solubility parameters theory was applied to analyze the relationship between solutes and solvents and the effect on the determination results,GB/T 258—2016,GB/T 4945—2002,GB/T 7304—2000,GB/T18609—2011 were respectively demonstrated to determine the acid content of gasoline , diesel oil , lubricating oil and crude oil on the basis of meeting the national standards . The solvents and solutes were mutually soluble, and the end point was determined rapidly and accurately , so that determination of acid content was more scientific and effective .
Key words : acid content , standard, solubility parameter , non-aqueous titration
石油产品酸含量反映了石油产品中酸性物质的含量,与石油商品的贸易、加工,石油产品使用质量、发动机寿命、大气污染等关系密切。目前,我国测定石油及
89
产品酸含量的标准方法多,同一样品采用可适用的不同标准分析数据的一致性不足。随着石油二次加工工艺的推广、煤基石油产品的不断推出,分析数据不一
基金项目:陕西省教育厅服务地方专项计划"化工过程多杂质资源集成耦合技术研究与应用”(14JF021)陕西省科学技术研究发展计划项目"石油化工过程多目标资源集成耦合关键技术的开发与研究”(2014K15-01-06)。
((896 flhuang@xy.n