【摘要】 本文采用吸附柱色谱浓集和GPC分离、紫外-可见分光光度法定量,研究了胜利渣油各组份中卟啉镍的分布和卟啉浓缩物的分子量分布。色谱分析结果表明,胜利渣油中约有一半的卟啉镍存在于重芳烃和胶质中,而且卟啉镍化合物比非卟啉镍化合物具有较大的正戊烷可溶性。这是溶剂脱沥青过程中卟啉镍比非卟啉镍难以除去的原因。GPC研究表明,胜利渣油镍卟啉化合物存在较宽的分子量范围(1280～400),但90％的镍卟啉化合物集中在分子量小于820的GPC组份中,约有一半的镍卟啉化合物集中在分子量小于660的GPC组份中。更多还原

【Abstract】 In this paper Shengli vacuum residue was chromatographed into several fractions on alumina. The nickel petroporphyrin compounds were concentrated by silica column chromatography and the concentrate was further separated into four fractions by preparative gel permeation chromatography (GPC). The distributions of nickel porphyrins in adsorption chromatography fractions and GPC fractions were studied with the determinations of porphyrin-nickel by atomic absorption spectrometry and nickel-porphyrin by ultroviolet-visible light spectrometry. The results show that a great part of nickel porphyrins are in polyaromatics and light-resins.Their molecular weights are in the range of 400-1300, most being less than 800. The data show that it is difficult to remove pet roporphyrins by solvent deasphalting. This is mainly due to their good solubility in solvents and the similarity of structures between polyaromatics and petrporophyrins.更多还原