hydrocarbons, C5-8, houdry butadiene by-product

The complex residuum from the distillation of C5 to C8 by-products from the Houdry butadiene production. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C5 through C9 and boiling in the range of approximately 240.degree.C to 450.degree.C (464.degree.F to 842.degree.F).