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Macmillan Learning The cumene process is used to convert benzene and propene in the presence of oxygen to phenol and acetone via the reaction

  

Macmillan Learning The cumene process is used to convert benzene and propene in the presence of oxygen to phenol and acetone via the reaction CH+CH+0,CH,OH+CHO This reaction is carried out with excess benzene and excess oxygen to ensure that no side reactions occur. A 1.15 ratio of benzene to propene is fed to a reactor in the presence of 29.5% excess air (N2 and O2). The first pass conversion of propene is 100%. The products leave the reactor and enter a condenser where the gaseous nitrogen and oxygen leave the process and the liquid organic products are fed to a distillation column. The distillation column separates the products from the reactants. Any unreacted reactants are fed into the fresh feed stream. The products are directed to a second distillation column that separates the acetone from the phenol. If 23.3 kg/hr of phenol is produced from this process, answer each of the questions. First, label the process flow diagram, putting either a given numeric value or the words "unknown" or "none" in each space. Do not leave any spaces blank. Variable names are shown for reference later. n mol/hr mol C H/mol mol CH/mol Fresh feed Reactor feed n = n = n= mol/hr mol/hr mol/hr mol/hr Distillation Reactor Condenser column 1 x = x= mol C.H/mol mol C. Ho/mol mol gas/hr mol C,H/mol mol CH/mol mol O/mol mol O/mol mol O/mol mol N/mol mol C,H,O/hr mol N/mol mol N/mol Answer Bank unknown 23.3 0.21 0.79 1.15 none 29.5 mol/hr mol C,HO/mol mol CHOH/mol Distillation column 2 n mol C HOH/hr kg CHOH/hr What is 1, the molar flow rate of fresh feed into the process? What are the mole fractions of CH (x1), CH, (x2), O (x3), and N2 (x4) in the fresh feed stream? x= x2= x3= x4= What is no n = the molar flow rate of the recycle stream? mol/hr mol CH/mol mol CH/mol mol O/mol mol N/mol mol/hr

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