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Introduction
Chemical engineering deals with the transformation of chemicals from one form (raw
materials which are renewable and non-renewable resources) to another form (products),
which is useful to man for meeting the requirements of comfortable living. This process
of accomplishing the transformation from raw material form to product form invariably
leads to the generation of some unwanted side products (pollutants) and depletion of
renewable and non-renewable resources. The demand for useful chemical products (such
as cement, sugar, pulp and paper, pharmaceuticals, petroleum and petrochemicals, etc.) is
ever growing with a rising population ...