Quaternary ammonium based biocides have been used for microbiological control in industrial water systems for more than 40 years. While they have good activity versus algae, they can cause problems with foaming or react negatively with anionic additives. More recently, quaternary phosphonium based biocides have been introduced. While they overcome some of the issues with quaternary ammonium based biocides, they lack surface activity and are incompatible with halogens. We report here on a new quaternary phosphonium biocide based on tributyl tetradecyl phosphonium chloride (TTPC). TTPC is effective at low concentrations, is fast acting and is effective against a broad spectrum of microorganisms including Legionella pneumophila. It has excellent surface active properties which makes it highly effective at removing biofouling and regular use has been shown to reduce the level of biofouling in model cooling systems. It is very effective with halogen based biocides, low foaming and has good compatibility with anionic scale and corrosion inhibitors which makes it broadly applicable to industrial water systems.

Subject
Biofouling, Water, Tubes, Quaternary ammonium, Alkyls, Phosphonium, Efficacy, Bacteria, Chlorine, THPS, Biocides, Deposit corrosion, Risk reduction
Keywords:
biocide, algicide, quaternary phosphonium compound, tributyl tetradecyl phosphonium chloride, TTPC, biofouling, surface activity, compatibility
© 2006 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2006
Association for Materials Protection and Performance (AMPP)
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