A multiple recycle-loop problem, formulated by Cavett2 and shown in Figure 10.36, has been used to test

Question:

A multiple recycle-loop problem, formulated by Cavett2 and shown in Figure 10.36, has been used to test tearing, sequencing, and convergence procedures. The flowsheet is the equivalent of a four-theoretical-stage, near-isothermal distillation (rather than the conventional near-isobaric type), for which a patent by Gunther3 exists. The flowsheet does not include necessary mixers, compressors, pumps, valves, or heat exchangers to make it a practical system. For the specifications shown in Figure 10.36, determine the component flow rates for all streams in the process.