The Evolving Refinery Flowscheme

The flowscheme of the typical refinery during the period 1950-1970 was essentially focused on the production of gasoline, diesel oil, domestic heating oil and industrial fuel-oil. Except for heavy naphtha, the product streams underwent no deep conversion. 

Purification of refinery gases by elimination of hydrogen sulfide as well as Claus units for sulfur recovery began to make their appearance. 

The treatment of aqueous wastes was also taken in account. 

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