Title page for ETD etd-10312005-123006


Document Type Master's Dissertation
Author Van Staden, Karen
URN etd-10312005-123006
Document Title Treatment of phthalic anhydride residue for improved handling and disposal
Degree MEng (Environmental Engineering)
Department Chemical Engineering
Supervisor
Advisor Name Title
Mr J F C Friend Committee Chair
Keywords
  • factory and trade waste disposal
  • phthalic acids residues handling
Date 2002-08-01
Availability unrestricted
Abstract
The handling and disposal of hot tarry liquid residues can be problematic in industry, in this case, a phthalic anhydride plant using naphthalene as feed stock. The residue from the plant contains an appreciable amount of phthalic anhydride which desublimates from the residue during draining, resulting in an unsafe working environment. In addition, the residue is a hot liquid that solidifies upon cooling, causing additional risks to personnel during handling and various problems associated with disposal. Research was conducted into finding a treatment method to reduce or eliminate the desublimation of phthalic anhydride from the residue and addressing the hot liquid residue, making the residue safer to handle and easy to dispose of. Laboratory experiments showed that the addition of Dicalite 4151 (a filter aid) in a concentration of 0,3 kg Dicalite 4151 per kg phthalic anhydride residue, resulted in the formation of a powdered residue. This was confirmed during plant trials where using the same concentration proved that a powdered residue could be obtained, while at the same time desublimation of the phthalic anhydride from the residue was negated by distilling the product from the residue mixture. An opportunity exists to test the use of filter aid in other residue producing industries to determine if the same results can be achieved.

2001 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

Please cite as follows:

Van Staden, K 2001, Treatment of phthalic anhydride residue for improved handling and disposal, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-10312005-123006/ >

H1219/ag

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