http://www.che.com Chemical Engineering en-us 2010 Tue, 16 Mar 2010 17:26:48 EDT Many reactions, extractions, separations and other operations in the chemical process industries (CPI) involve the use of organic solvents. In addition to handling and disposal issues, organic solvents can pose a number of environmental concerns, such as atmospheric and land toxicity. In many cases, conventional organic solvents are regulated as volatile organic compounds (VOCs). In addition, certain organic solvents are under restriction due to their ozone-layer-depletion potential. Supercritical carbon dioxide is an attractive alternative in place of traditional organic solvents.... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/5449.html Mon, 1 Feb 2010 0:00:00 EST A survey of tower failures [ 1 ] ranks kettle reboilers as the most troublesome reboiler type in the chemical process industries (CPI). Excessive pressure drop in kettle reboiler circuits is the... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/5453.html Mon, 1 Feb 2010 0:00:00 EST Researchers from the Center for Membrane Technology, Beijing University of Technology (China; www.bjut.edu.cn) have developed a new spiral-wound membrane module for use in oxygen-enriched... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/5441.html Mon, 1 Feb 2010 0:00:00 EST The special group "Water and Wastewater Technology" of the German Process Plant and Equipment Association (VDMA; Frankfurt, Germany; www.vdma.org) has released a new VDMA Specification... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/5171.html Tue, 6 Oct 2009 0:00:00 EDT Besides the capital costs of a filter, there are additional factors that affect overall filtration economics, namely: (a) design considerations and options, (b) process requirements, (c) maintenance requirements, (d) maintenance procedures, (e) mean-time-between-changeout (MTBC) costs, and (f) disposal costs. This article outlines basic design issues, discusses selection considerations, and presents a cradle-to-grave cost analysis of bag and cartridge filtration.... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/5161.html Thu, 1 Oct 2009 0:00:00 EDT In an agreement with Raschig GmbH (Ludwigshafen, Germany) announced Sept. 16, UOP (Des Plaines, Ill.) has acquired exclusive rights to offer Super-Pak equipment for all UOP process units... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/5074.html Thu, 17 Sep 2009 0:00:00 EDT Successful adsorber design requires information about certain adsorbent properties, including: adsorbent densities and void fractions; isotherms or other equilibrium data; and data on mass-transfer kinetics and fixed-bed dynamics. This one-page reference sheet explains adsorbent properties and provides commonly used equations.... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/adsorption/4990.html Sat, 1 Aug 2009 0:00:00 EDT A team from the School of Chemical Sciences and Engineering, at the University of New South Wales (Sydney, Australia; www.unsw.edu.au), has developed a process for the micronization of insulin... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/crystalization/4962.html Sat, 1 Aug 2009 0:00:00 EDT “When you improve the efficiency or capacity of a product, it almost always can be used to improve the process economics with respect to investment costs or operating costs,” says... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/4928.html Wed, 1 Jul 2009 0:00:00 EDT Advanced Membrane Technologies and Applications Edited by Norman N. Li. Wiley. 111 River St., Hoboken, NJ 07030. Web: wiley.com. 2008. 994 pages. $150.00. Reviewed by Peter S. Cartwright... http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/4909.html Wed, 1 Jul 2009 0:00:00 EDT