Chemical Processing - April 2008 - (Page 5)

April 2008 • Volume 71, issue 4 28 Better understanding boosts mixer scale-up Design and Optimization Despite an ever growing number of theories and equations, there isn’t a golden rule to successful scale-up of rotor/stator devices. The diverse range of issues and the multitude of variables mean that experience and trials still must play a crucial role. 36 Don’t err with air compressors Maintenance and Operations Providing a suitable supply of compressed air requires understanding the differences in pressure and air-quality requirements for various processes, plus instrument air. Segregation of some systems may enable more efficient operation. The cost of loss of production, due to an interruption of air supply, also must be considered. 20 Columns 7 9 is it a tragedy or comedy for engineers? Cover Story Chemical Processing’s 2008 Job Satisfaction and Salary Survey shows chemical engineers appear to be more inclined to don the mask of happiness over their economic situations. depArtments 13 In Process • ybrid membrane aims to H displace distillation • dsorbent breaks CO2 A barrier From the editor Vendors should see the light. 41 Control performance supervision enhances revamp Making it Work An upgraded ethylene cracker achieved targeted production rates in record time. Better control system performance was crucial. With almost 1,000 control loops in the ethylene cracker and only a few control engineers, the plant needed to focus efforts on the most important areas. ChemicalProcessing.com O nline resources can make your life easier. A n alert operator is a safe operator. H ow do you know your plant is efficient? This issue carries big stakes. A void exchanger errors. U.K. rolls out DICE. 11 Field notes 45 Process Puzzler S ucceed through thick and thin. 17 energy saver 49 equipment & services 52 product spotlight/ Classifieds 57 Ad Index 19 Compliance Advisor 48 plant insites 58 end point Chemical Processing (ISSN 0009-2630) is published monthly by Putman Media Inc., 555 West Pierce Road, Suite 301, Itasca, IL 60143. Phone (630) 467-1300. Fax (630) 467-1109. Periodicals postage paid at Itasca, IL, and additional mailing offices. POSTMASTER: Send address changes to Chemical Processing, P.O. Box 3434, Northbrook, IL 60065-3434. SUBSCRIPTIONS: Qualified reader subscriptions are accepted from operating management in the chemical processing industries at no charge. To apply for a qualified subscription, fill in the subscription card. To nonqualified subscribers in the United States, subscriptions are $68 per year. Single copies are $14. Canadian and foreign annual subscriptions are accepted at $115 surface per year. Single copies are $16. Canada Post International Publications Mail Product Sales Agreement No. 40028661. Canadian Mail Distributor information: Frontier/BWI, PO Box 1051, Fort Erie, Ontario, Canada, L2A 5N8. Copyright 2008 Putman Media Inc. All rights reserved. The contents of this publication may not be reproduced in whole or in part without the consent of the copyright owner. REPRINTS: Reprints are available on a custom basis. For price quotation, contact Foster Reprints, (866) 879-9144, www.fostereprints.com also publishes Control, Control Design, Food Processing, Pharmaceutical Manufacturing and Plant Services. Chemical Processing assumes no responsibility for validity of claims in items reported. www.chemicalprocessing.com April 2008 • 5 http://www.fostereprints.com http://www.chemicalprocessing.com

Table of Contents Feed for the Digital Edition of Chemical Processing - April 2008

Chemical Processing - April 2008 Contents From the Editor ChemicalProcessing.com Field Notes In Process Energy Saver Compliance Advisor Is It a Tragedy or Comedy for Engineers? Better Understanding Boosts Mixer Scale-up Don't Err With Air Compressors Control Performance Supervision Enhances Revamp Process Puzzler Plant InSites Equipment & Services Product Spotlight/Classifieds Ad Index End Point

Chemical Processing - April 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.