METHOD OF REUSING SPENT PETROLEUM DERIVATIVES Russian patent published in 2000 - IPC

FIELD: petroleum processing. SUBSTANCE: initial spent petroleum derivatives (spent mineral and synthetic lubrication oils, greases, low-grade petroleum products) are preliminarily treated to remove suspended impurities and water and the subjected to electrical cracking. Gas cracking products (acetylene-containing gas) are additionally freed from carbon black and corrosive components, and liquid cracking products (carbon black suspension) are separated on vacuum centrifuge into carbon black concentrate (graphite grease) and liquid hydrocarbons, which are returned into cracking stage and/or for being mixed with initial material. All liquid organic products can also be reused according to invention, including those containing sulfur, oxygen , nitrogen, chlorine. and other heteroatoms. EFFECT: enabled unified collection and storage of spent combustive and lubricating materials and enabled efficient utilization of processing products, in particular as gas for flame treatment of metals and as graphite grease for coarse pinion transmissions. 3 tbl, 1 dwg