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Which synthetic products can be made from coal chemicals?
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coal utilization
Cross-regenerative coke oven. (A) Cross section, showing the alternating arrangement of flue walls and ovens; (B) longitudinal section, showing (left) a series of combustion flues in a single flue wall and (right) part of a long, slotlike oven.
Coal serves as a vital feedstock for the chemical industry, where its complex structure is broken down to produce a variety of synthetic products. Through processes such as carbonization, gasification, and liquefaction, coal is converted into essential chemical building blocks.123
Key Synthetic Products and Derivatives
- Coal Tar Derivatives: The carbonization of coal produces coal tar, which contains numerous commercially important compounds. These include tar acids and tar bases, such as pyridine, which is used to create various pharmaceutical derivatives.4
- Synthetic Dyes: Many synthetic organic dyes, historically known as coal-tar dyes, are manufactured from derivatives found in coal tar.5
- Liquid Hydrocarbons: Through coal liquefaction, coal can be converted into liquid products that resemble crude oil. These processes, whether direct or indirect, allow for the production of liquid fuels and chemical feedstocks.32
- Synthesis Gas: Indirect liquefaction and gasification break coal down into synthesis gas—a mixture of carbon monoxide and hydrogen—which serves as a precursor for rebuilding desired liquid hydrocarbons and other industrial chemicals.23
Additionally, many chemicals traditionally associated with petroleum can be produced from coal, as the resulting substances are often identical regardless of the source material.6