Oil and Petroleum Industry
From London's Ghost Acres
What else did the early petroleum industry produce? I don't think they were producing petrol in this time period.
This mentions products made by WWII but I'm not sure when they started being manufactured:
"By World War II, petrochemicals were being used in the United States to produce plastics and fibers. Petrochemicals are chemical products derived from oil or natural gas. Polymer science and chemical engineering were becoming the driving forces of the industry. Polymer science uses petrochemicals to make products such as plastics, resins, paints, and adhesives. Chemical engineering made the production of such products possible, and at a low enough cost to be profitable. After World War II, the industry experienced a shift in production from organic chemicals, such as coal, to petrochemicals." http://www.technofunc.com/index.php/domain-knowledge-2/chemicals-industry/item/history-of-chemicals-industry