Propane removes asphalts from crudes. [120 to 180/sup 0/F with propane-oil ratios from 4:1 to 16:1]

@inproceedings{Dunning1957PropaneRA,
  title={Propane removes asphalts from crudes. [120 to 180/sup 0/F with propane-oil ratios from 4:1 to 16:1]},
  author={H. Neal Dunning and John Walker Moore},
  year={1957}
}