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How are petrochemicals made from petroleum and natural gas?
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chemical industry
Dow Chemical plant in South Charleston, West Virginia.
Petrochemicals are chemical products derived from petroleum and natural gas that serve as essential raw materials for manufacturing plastics, synthetic fibers, fertilizers, and other commercial goods. The production process relies on converting hydrocarbons into reactive feedstocks, primarily through thermal and catalytic processes.1
Key Manufacturing Processes
- Fractional Distillation: Crude oil is first separated into various components, such as naphtha and gas oils, using fractional distillation. These fractions serve as the starting materials for further chemical processing.2
- Cracking: This process breaks down larger hydrocarbon molecules into smaller, more reactive ones. Steam cracking is widely used to produce olefins like ethylene and propylene, often using ethane from natural gas or naphtha as a feedstock. Catalytic cracking is another method used to generate these olefins.13
- Catalytic Reforming: This process is used to produce aromatic compounds—such as benzene, toluene, and xylene—from naphtha fractions.4