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http://dx.doi.org/10.9713/kcer.2017.55.1.54

Process Design for Recovery of Unreacted Styrene Monomer for Utility Saving  

Bong, Jooyoung (Yeosu plant, Lotte Advanced Materials)
Na, Sujin (Department of Chemical & Biomolecular Engineering, Sogang University)
Lee, Kwang soon (Department of Chemical & Biomolecular Engineering, Sogang University)
Publication Information
Korean Chemical Engineering Research / v.55, no.1, 2017 , pp. 54-59 More about this Journal
Abstract
A study for process design to curtail the utility consumption during residual styrene monomer recovery in an ABS polymerization process was carried out. Among different techniques for residual monomer recovery, the steam stripping is dominantly employed in industries. The existing process, however, consumes a large amount of utility (steam and cooling water), and this study focused on the design of a new process that can substantially spare the utility consumption. A new process was configured to utilize the latent heat of the stripping steam, which is condensed with the monomer using cooling water after exiting the stripper. The condenser was modified to use vacuum state water as coolant and to generate vacuum state steam using the latent heat of the stripping steam. The steam is injected to the stripper as the stripping steam after upgrading using a compressor. Through this modification, consumption of steam and also cooling water could be significantly reduced at some expense of electricity for compressor operation.
Keywords
ABS polymerization; Steam stripping; Styrene monomer recovery; Heat integration; Utility saving;
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