Abstract

Conceptual design, steady state economic optimization, and decentralized plantwide control of a conventional “reaction followed by separation” process for continuous manufacture of monoisopropyl amine (MIPA) via the catalytic amination of isopropyl alcohol (IPA) is studied. A unique feature of the design is the recycle to extinction of the diisopropyl amine (DIPA) side product for a sustainable zero DIPA discharge process. The reactor effluent mixture separation is complicated by the presence of DIPA–water, IPA–water, and IPA–DIPA minimum boiling binary azeotropes. Using the residue curve map tool, two alternative designs, without a decanter (FS1) and with a decanter (FS2), are devised and optimized with respect to the dominant design variables. A high single-pass reactor conversion is necessary so that the reactor effluent composition is in the appropriate distillation region to guarantee feasibility of the separation scheme. Also, reactor oversizing is needed to ensure operability for a moderately large...

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