ThePennsylvania Petroleum Corporation was a North American business founded in 1870 by Edgar Van Dant and financed by John Rockefeller. Van Dant was a chemical engineer who studied petroleum in the 1860s, working out a process for distilling various useful products, including lubricating oil, grease, kerosene, and vulcazine. Under Van Dant and Rockefeller, Pennsylvania Petroleum was soon the largest company in the C.N.A.'s oil industry. Five years later, Rockefeller created a petroleum consortium, Consolidated Petroleum of North America, that included Pennsylvania Petroleum. By 1880, Consolidated Petroleum controlled over ninety percent of the C.N.A.'s petroleum supply.