胜利减压渣油中钙的分布及特点

用吸附柱色谱法研究了胜利减压渣油中钙在4组分中的分布，结果表明大部分钙集中在柱残余质中，其余钙主要分布在芳香分、沥青质及苯不溶物中，通过阳离子交换、酸性水溶液萃取、乙醇萃取及红外分析考察了胜利减渣中钙化合物的某些特点。

Calcium Distribution and Chemical Aspects in Shengli Residue

The Shengli residue was separated into four fractions by column chromatography and the concentration of calcium in every fraction was determined. At the same time the nickel concentration in every fraction was determined too. A comparison of the distribution characteristics in fractions between calcium and nickel compounds was made. Some chemical aspects are showed through ion exchange, extraction in acid solution, extraction by ethanol and IR spectrum. The results show that the characteristics of calcium and nickel are quite different. Most of calcium compounds enrich in resin and were adsorbed in alumina firmly, so that it is difficult to be washed off. But almost all of nickel compounds could be washed off at the same condition. The rest calcium compounds are distributed in aromatics, asphaltene and benzene insoluble material and the rest of nickel compounds are distributed in aromatics and asphaltene. The possible calcium compound is carboxyl calcium. The ion exchange and extraction results show that the content of calcium ion or calcium compounds easy to ionize is less than thirty percent. Little calcium compounds is strong polar with small molecular weight.