In order to decrease the content of unstable components such as sulphur, nitrogen and so on in RFCC LCO, an approach to chemical refining agent FS is adopted in our experiment.

为了降低重油催化裂化柴油中硫、氮等不安定组分的含量，采取添加fs化学精制剂的方法。

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Steel and iron manufacturers also extensively use oxygen or oxygen-enriched air to affect chemical refining and heating associated with carbon removal and other oxidation reactions.

钢铁制造商还广泛使用氧或富氧空气来影响同除碳和其它氧化反应相联系的化学精炼和加热。

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Principal USES include ore processing, fertilizer manufacturing, oil refining, wastewater processing and chemical synthesis.

其主要用途包括矿石加工，化肥生产，石油炼制，废水处理和化学合成。

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Chemical manufacturing, petroleum refining, pulp and paper and iron and steel manufacturing dominate industrial energy use.

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Armed with a degree in chemical engineering, Fred invented a more efficient process for refining oil and built a prosperous company that Charles took over in the 1960s.

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