Petroleum refining

{
  "id": "MLC-T-ENV-020805",
  "term": "Petroleum refining",
  "field": "Environment",
  "term_source": "Petroleum Refining",
  "definition": "Petroleum refining processes and operations can be separated into five basic areas: Petroleum refining begins with the distillation, or fractionation, of crude oils into separate hydrocarbon groups. The resultant products are directly related to the characteristics of the crude processed. Most distillation products are further converted into more usable products by changing the size and structure of the hydrocarbon molecules through cracking, reforming, and other conversion processes. These converted products are then subjected to various treatment and separation processes such as extraction, hydrotreating, and sweetening to remove undesirable constituents and improve product quality. Integrated refineries incorporate fractionation, conversion, treatment, and blending operations and may also include petrochemical processing.",
  "subject": "Commercial processes",
  "references": [
    "DOL Occupational Safety and Health Administration Petroleum Refining Process at https://www.osha.gov/dts/osta/otm/otm_iv/otm_iv_2.html#3"
  ],
  "url": "https://mlchart.com/terminology/environment/petroleum-refining/"
}