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1 – As the demand for motor gasoline increased attention was directed to manufacture of gasoline of high-octane number via polymerization and alkylation processes. 2 – Sulphur compounds have bad effects on the different fractions of petroleum oil. So, sweetening and desulphurization are important treating processes for oil refinery 3 – Pesticides are chemical agents stop or kill pests and plant diseases 4 – Methanol is a chemical compound widely used for industrial purposes and prevalent in our everyday lives
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