The preliminary study about the composition of Daqing heavy fraction oil

The family composition of Daqing heavy fraction oil and the latent content of lubricating oil by mass spectrography and slovent dewaxing methods were determined! and then compared with document data. The change of Daqing heav y distillate is discussed. The results show Daqing crude oil and its distil lates have the trend to be heavier,but its heavy distillates are still suit able for catalytic stocks of heavy catalytic cracking and its residuum can be also used for the feed stocks and other wide uses. We hope the analysis results can provide scientific basis for refineries.