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Displaying 61 - 80 of 1612 stories.
September 1, 2013
Many chemical engineers study or employ distillation trays, gas-liquid separators and spray nozzles. Most of those engineers have studied or employed force balances around liquid droplets suspended in upward-flowing vapor streams. Considering a droplet of size “ d, ” for the droplet to be suspended motionless, the summed forces of drag and buoyancy must equal exactly the force of gravity. At...
http://www.che.com/extras/pdf/The-science-of-droplets_10949.html
September 1, 2013
Solid and serrated fins (Figure 1) are widely used as heat transfer surfaces in boilers and heaters. The use of finned tubes makes heat exchanger equipment compact. The fluegas pressure drop is also decreased relative to a comparable plain-tube design, resulting in lower operating costs. Fin geometry, such as fin density (fins/in.), fin height and fin thickness, should be selected with care as it impacts...
http://www.che.com/extras/pdf/Understanding-Finned-Heat-Exchangers_10954.html
August 1, 2013
North America Energy Storage North America. Messe Düsseldorf North America (Chicago, Ill.). Phone: 312-781-5185; Web: mdna.com San Jose, Calif. Sept. 10–12   Winding: Machines, Mechanics and Measurements. Assn. of International Metallizers, Coaters and Laminators (Fort Mill, S.C.). Phone: 803-948-9470; Web: aimcal.org Chicago, Ill. Sept. 19–20   The 2013 Polyurethanes Technical...
http://www.che.com/extras/pdf/Calendar-September-November_10772.html
August 1, 2013
As an industry sector, bio-based chemicals have seen significant expansion over the past year, with several commercial developments occurring in a group of four-carbon commodity chemicals, including succinic acid, butanols, butadiene and butanediol. While a host of technology-based companies have built new facilities and scaled up production capabilities, others have formed alliances with established...
http://www.che.com/extras/pdf/Bio-Based-Chemicals-Gain-Market-Acceptance_10786.html
August 1, 2013
Propylene has been established as an important part of the global olefins business, trailing only ethylene in terms of volume of product. Because inexpensive natural gas from shale in the U.S. is increasingly used as a feedstock for producing ethylene, lower quantities of three- and four-carbon olefins are available. For this reason, new chemical processes for on-purpose propylene using low-cost raw...
http://www.che.com/extras/pdf/Methanol-to-Propylene-Technology_10789.html
August 1, 2013
The management of process plants requires understanding and applying the fundamental tenets of safe design, construction and operation of facilities. This overview summarizes best practices that have been developed to ensure the safest possible use of DP:DPO (diphenyl–diphenyl oxide) eutectic heat-transfer fluids. A review of the concepts necessary for effectively maintaining a leak-tight...
http://www.che.com/extras/pdf/Detection-and-Prevention-of-DPDPO-Fluid-Leaks_10792.html
August 1, 2013
The fourth ChemInnovations Conference and Expo will be held September 25 and 26 in Galveston, Tex. at the Moody Gardens Convention Center. Programmed by chemical industry leaders and designed for professionals in the chemical process industries (CPI), the event aims to supply information that will help companies and individuals prepare for the future of the industry. The conference portion of...
http://www.che.com/extras/pdf/ChemInnovations-2013-Conference-and-Expo-Preview_10817.html
August 1, 2013
The scaleup of liquid mixing systems does not have to be a mystery. The principles are quite well understood, although knowing which principles apply is not always obvious. Follow this guidance to improve operation. 1. Liquid mixing scaleup. Liquid mixing is the most common use of scaleup methods in chemical engineering. The concept of scaleup is to take small-scale results and predict results in...
http://www.che.com/extras/pdf/Ten-Things-You-May-Not-Know-About-Liquid-Mixing-Scaleup_10818.html
August 1, 2013
Plant Watch Sasol awards integrated complex contract to WorleyParsons July 11, 2013 — WorleyParsons Ltd. (North Sydney, Australia; www.worleyparsons.com) has been awarded a contract by Sasol North America, Inc. (Sasol) for an integrated gas-to-liquids (GTL) and ethane-cracker complex, which includes an ethane cracker producing 1.5 million metric tons per year (m.t./yr) of ethylene with downstream...
http://www.che.com/extras/pdf/CNOOC-selects-Ineos-Technologies-process-and-more-business-news_10819.html
August 1, 2013
Spagnoletti Spiesshofer Evans Pepper Usuki Amato Spagnoletti becomes president of Taylor Wharton Cryogenics (Theodore, Ala.), a maker of cryogenic equipment for the industrial gases, life sciences, and liquefied natural gas markets. Ulrich Spiesshofer becomes CEO of ABB (Zurich, Switzerland). He was formerly the head of ABB’s discrete automation and motion division. Foth Infrastructure &...
http://www.che.com/extras/pdf/Ulrich-Spiesshofer-becomes-CEO-of-ABB-_10821.html
August 1, 2013
Raw materials and energy represent two of the largest expenses in the chemical process industries (CPI). Energy reduction is necessary to sustain cost-effective production and manage capacity in the ever-changing CPI marketplace. Process simulation software can prove extremely valuable in evaluating energy reduction potential. This article discusses the successful application of process simulation software...
http://www.che.com/extras/pdf/Absorber-Optimization-Employing-Process-Simulation-Software_10822.html
July 1, 2013
Plant Watch Uhde Inventa-Fischer to build commercial-scale Nofia plant June 12, 2013 — Uhde Inventa-Fischer AG (Berlin, Germany and Domat/Ems, Switzerland; www.uhde-inventa-fischer.com) has won a contract to build the world’s first commercial-scale plant for production of Nofia, a flame retardant polymer, for the Belgian subsidiary of FRX Polymers, Inc. (Chelmsford, Mass.; www.frxpolymers.com)...
http://www.che.com/extras/pdf/Linde-to-build-large-ammonia-plant-in-Russia-and-more-business-news_10694.html
July 1, 2013
Security of SCADA (supervisory control and data acquisition) and other industrial control systems (ICSs) is a complex subject, and one that has received much attention in recent years. While modern industrial control systems use many of the same computers, operating systems and networking components as conventional business networks, the two kinds of networks are managed very differently. As a result, what...
http://www.che.com/extras/pdf/Securing-Industrial-Control-Systems_10695.html
July 1, 2013
  Hughey Joy Iafigliola Rochas Yuille Hovione (Loures, Portugal), a developer of active pharmaceutical ingredients and drug-product intermediates, appoints Justin Hughey , to lead the particle-design sciences team at its New Jersey site.   Bayer MaterialScience LLC (Pittsburgh, Pa.) names Christine Bryant as head of commercial operations for its coatings, adhesives and...
http://www.che.com/extras/pdf/Douglas-Joy-becomes-general-manager-of-Heraeus-Sensor-Technology-USA-_10696.html
July 1, 2013
Rotary valves are used almost universally in pneumatic conveying systems. They serve three main functions: 1) to provide a pressure-seal (airlock) between two adjacent processes, 2) to provide solids metering (feeding) and 3) to provide a combination of solids metering and a pressure-seal for feeding solids into a pneumatic conveying system. Rotary valves are common devices for feeding solids into a...
http://www.che.com/extras/pdf/Rotary-Valves-in-Pneumatic-Conveying-Systems_10698.html
July 1, 2013
For most engineering-procurement-construction (EPC) projects in the chemical process industries (CPI), the data sheets developed at the beginning of the process provide the “shopping lists” that guide the procurement group on the purchase of equipment, system packages, instruments and more. Data sheets should function as the central document, into which all final result of design or...
http://www.che.com/extras/pdf/Getting-the-Most-Out-of-Data-Sheets_10699.html
June 1, 2013
There is an emerging crisis brewing for the chemical processing industries (CPI) in many regions of the world. Those regions include China, the world’s manufacturing powerhouse; swaths of the U.S., including large parts of its South; and chunks of Europe. For once, the crisis has nothing to do with energy costs. The emergence of cheap shale gas in the U.S., and the identification of exploitable...
http://www.che.com/extras/pdf/The-pending-water-shortage_10553.html
June 1, 2013
North America Risk Management of Corrodible Systems. National Assn. of Corrosion Engineers (Houston). Phone: 281-228-6200; Web: event.nace.org Orlando, Fla. June 18–20 Valve World Americas Expo & Conference. Messe Düsseldorf North America (Chicago, Ill.). Phone: 312-781-5185; Web: mdna.com Houston June 25–26 Elastomer Technology & Seal Design for the Oil & Gas Industry...
http://www.che.com/extras/pdf/Calendar-June-to-November-2013_10563.html
June 1, 2013
Dry, granular solids can be conveyed in a number of ways. Two common devices for transporting granular solids are the angular-pitch vibrating conveyor and the horizontal differential-motion conveyor. The variability in the design and performance between the two types stems from the differences in the kind of motion required to move the mass in one direction. The most significant difference between the two...
http://www.che.com/extras/pdf/Solids-Conveying_10572.html
June 1, 2013
Calculating the volume of a liquid in a vessel of a complex shape is a common task for chemical engineers. However, there are several difficulties associated with accurately carrying out this calculation. In my own experience as a chemical engineer, I have become familiar with the complexities of calculations related to determining the volume of a liquid contained in a vessel with an irregular shape...
http://www.che.com/extras/pdf/Solving-Vessel-Equations-A-Better-Way_10573.html
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