A conceptual design for a cumene production process (250 ton/day of cumene) is to be performed. Cumene is produced from benzene and propylene by the following reaction: C6H6 + C3H6 C9H12 An undesired reaction of cumene and propylene to form p-diisopropylbenzene (p-DIPB) also occurs: C9H12 + C3H6 C12H18 Both reactions are irreversible. The following table summarises the Input Information for the process. Production rate (tons/day) 250 Raw materials 95% propylene 5% propane at 25C $ 900/ton Pure benzene at 25 C $ 750/ton Product Cumene $ 1300/ton By-product p-DIBP $ 600/ton (sold as fuel) Reaction conditions Benzene to propylene ratio (feed to reactor) 4:1 Selectivity: 85% Single-pass Conversion: 100% propylene Selectivity is define 4:1 Selectivity: 85% Single-pass Conversion: 100% propylene Selectivity is define Selectivity is define ST PDP3701 Assessment 1/2023 Page 3 of 3 UNISA 2023 5. Draw and label an input-output structure for the process. Explain your reasoning for the selected structure. (8) 6. Perform an overall material balance for the process, based on the input-output structure and the reaction information provided. Provide flowrates in kmol/h. (15) 7. Determine the economic potential (in $/annum) of the process. (10) TOTAL: 50