伊敏湖底褐煤抽提物中有机氧化合物的组成特征

Compositional Characteristics of Organic Oxygen Compounds in Extract from Yimin Brown Coal

研究了海拉尔盆地伊敏湖底褐煤抽提物中３类有机氧化合物（酸、醇、酮）的组成特征。在酸性组分中，正构一元酸丰度最高，占２９．２％，其分布以ｎＣ２４为主峰，ＥＯＰ为１０．０；藿烷酸的丰度为２０．６９％，包括αβ，βα和ββ三种构型；相对丰度最高的是２０Ｒββ升藿烷酸。在中性非烃组分中，正构醇和甲基酮分别占２４．６％和５．７８％，其中正构醇的分布以ｎＣ２４为主峰，ＥＯＰ为１６．７，而甲基酮的分布以ｎＣ２９为主峰。此外，还检测出了藿烯酸、甲基藿烷酸和甾醇、甾酮及藿酮。对比化合物的分布特征可知，正构酸和醇都与正构烷烃具有生源联系。

The compositional characteristics of three types of organic oxygen compounds(acid,alchol and ketone) in the extract from Yimin brown coal of Hailaer basin have been studied.The main components of the acidic fraction are the normal acids and hopanic acids,constituting 29. 2% and 20. 69% respectively. The distribution of the former is characterized by nC24 acid as the richest compound, EOP of whom is 10. 0.The hopanic acids with αβ,βαorββconfiguration have all been found, the richest being 20Rββ homohopanic acid.The normal alchol and normal methyl ketone constitute 24. 6% and 5. 78% of the neutral non-hydrocarbon fraction respectively. The normal alchol distribution also has strong even-to-odd carbon number predominance with nC2 alchol as the most abundant one and EOP is 16. 7. The carbon number of the richest compound in the normal methyl ketone distribution is 29. In addition, hopanic acid, methyl hopanic acid, sterol, stenone and hopanic ketone have been determined in the non-hydrocarbon fractions.According to the characteristic of the compound distribution, both the normal acid and alchol have source association with n-alkane in the samples.