催化裂化汽油铜片腐蚀原因分析及新型铜片腐蚀抑制剂的研究

催化裂化汽油铜片腐蚀合格是重要的国标之一 ,但由于将重油作为催化裂化原料而使部分催化裂化汽油铜片腐蚀不合格。采用国标试验方法和现代仪器分析方法 ,探讨了单一硫化物及汽油的铜片腐蚀现象并对腐蚀产物进行了分析。试验表明 ,油品中某些活性硫化物可产生铜片腐蚀 ,但不同的硫化物产生腐蚀的程度不同 ;汽油中由于存在某些活性硫化物 ,如元素硫或多硫化物 ,从而产生铜片腐蚀。在此基础上开发出了新一代的汽油铜片腐蚀抑制剂UNOP 2 ,并对其抑制汽油腐蚀性能进行了试验。结果表明 ,UNOP 2油溶性好 ,抑制汽油铜片腐蚀性能优良 ,且不影响催化裂化汽油的理化性质

Analysis of copper strip corrosion and application of anti-corrosion additive used for copper strip corrosion test for FCC gasoline

The copper strip corrosion qualification for FCC gasoline is one of the national standards. Since more AGO or VGO as the feed of FCC unit, the copper strip corrosion of FCC naphtha is becoming one thorny problem. According to the national standard test method and the modern equipment analysis, an approach to the copper strip corrosion of some independent sulfides and corrosive gasoline was carried out, and the products formed on the copper strip were analyzed. The results demonstrate that the different active sulfides can induce the different corrosion degrees for copper strip. The existence of active sulfides in gasoline is the reason resulting in copper strip corrosion. An anti corrosion additive UNOP 2 for FCC gasoline was developed. The copper strip corrosion test for sulfides and gasoline were made. The anti corrosion characteristic tests demonstrate that UNOP 2 has the good solubility in gasoline and strong ability to prevent the copper strip corrosion.