摘要
以辽河油田稠油为研究对象,通过原子吸收光谱、实沸点蒸馏等手段,研究了辽河油田稠油中Au、Ag、Pt和Pd等贵金属在不同馏分中的分布特征。结果表明,经过实沸点蒸馏后,贵金属不同沸程温度的原油馏分中含量和分布存在很大差异,Au、Ag、Pt、Pd主要集中在渣油馏分中,在沸点>508℃的渣油馏分中Au、Ag、Pt、Pd的比例分别是93.4%、76.9%、73.4%和68.0%;采用选择性萃取的方法对金在稠油中的存在形态的初步研究发现,金在稠油中主要以有机配合物和少量无机配合物形式存在。
The abundance and distribution characteristics of precious metals including Au, Ag, Pt and Pd in heavy oils from the Liaohe oilfield in China have been investigated by means of graphite furnace atomic adsorption spectrometry (GFAAS), true boiling point distillation (TBP) and partial extraction, back extraction etc. The results show that contents of precious metal in different distillation fractions vary greatly with temperature ranges, and that precious metals in heavy oils are mainly concentrated in residue, and the amounts of Au, Ag, Pt and Pd in residue respectively account for 93.4%, 76.9%, 73.4%and 68.0%of total amounts of Au, Ag, Pt and Pd in heavy crude oil. The gold in heavy oil exists mainly in the form of Au+organic complexes and partly in the form of Au3+organic complex and aqueous soluble compounds.
出处
《地球化学》
CAS
CSCD
北大核心
2004年第5期521-527,共7页
Geochimica
基金
中国石油天然气集团公司石油中青年创新基金资助项目
关键词
稠油
贵金属
分布
赋存状态
辽河油田
heavy oil
precious metal
distribution
occurrence
Liaohe oilfield
