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Archives :: Processing & Handling :: Separation (Liquid-Liquid & Gas-Liquid)

Displaying 201 - 220 of 284 stories.
September 15, 2008
The need to conserve water is becoming a common concern throughout the world. Whether this is due to the cost of water, availability of water, or environmental concerns, water conservation is becoming a major focal point, both in the public and private sector. In those areas where renewable water resources are limited, and in regions where there are significant environmental concerns and costs associated...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Feature-Report-Water-Reuse-and-Conservation-in-the-CPI_4171.html
September 15, 2008
Vogelbusch GmbH (Vienna, Austria; www.vogelbusch.com) has developed a patent-pending distributor system that it claims makes possible the adaption of simulated moving bed (SMB) chromatography for use in the pharmaceutical industry. Prior to this, SMB use has been limited to the commodity sector, says the firm (see CE, August 1994, p. 30). The...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Chementator-Single-column-SMB_4195.html
September 15, 2008
Crystallization is a method of solid-fluid separation in which pure chemical crystals are formed. Crystallization kinetics consists of three major phenomena: nucleation (the birth of a crystal), transfer of the solute from the supersaturated solution to the crystal surface, and a reaction during which the solute becomes incorporated into the crystal. Supersaturation In order to drive the process of...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/crystalization/Facts-at-Your-Fingertips-Crystallization_4172.html
August 15, 2008
A Filter Bag for Food, Drug and Beverage Applications Introduced by the manufacturer as the first series of filter bags specifically designed for the food, beverage, and pharmaceutical industries, Cleargaf filter bags (photo) promise full compliance with U.S. and European food contact requirements and are independently certified. The filter bags meet the EU’s more stringent regulations on low...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Focus-On-Filtration_4086.html
August 15, 2008
Market demand for water purification is driving reverse osmosis forward Increasingly, water has become one of the hottest topics of the decade. Estimates indicate that water usage has increased tenfold in the last ten years. A recent United Nations report noted that one third of the world’s population lives in areas suffering from water shortages. Furthermore, industrial demands for water are...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Technology-Showcase-Reverse-Osmosis_4096.html
July 15, 2008
Monitoring Our Atmosphere Please refer to the Editor’s Page, April 2008: Mr. Gerald Ondrey’s last sentence sums it up. "Ultimately, the only truly green solution is to reduce consumption — the second law of thermodynamics says so." Rep. Roscoe Bartlett (R, Md.) speaks out plain and clear regarding energy policy, but colleagues respond politically and not...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/July-2008-Letters_3999.html
June 15, 2008
ExxonMobil Corp. (Irving, Tex.; edlinks.che.com/7373-537) plans to spend more than $100 million on a commercial demonstration of its Controlled Freeze Zone (CFZ) technology for removing carbon dioxide from natural gas. The plant, to be located at the company’s Shute Creek Treating Facility near LaBarge, Wyo., will...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Chementator-Scaleup-is-set-for-a-natural-gas-treating-process-that-freezes-out-CO2_3960.html
June 15, 2008
After several years of proven operation in the food- and nutritional-products industry, a patented drying technology is now ready to be applied for any liquid or slurry product. Developed by MCD Technologies, Inc. (Tacoma, Wash.; edlinks.che.com/7373-535), the Refractance Window (RW) system is said to cost about one third as much as freeze drying equipment, and consumes about one third to half the energy...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/evaporation/Chementator-Drying-at-the-speed-of-light_3958.html
May 15, 2008
Carbone Lorraine (CL; Paris, France; edlinks.che.com/7372-538) is launching a new welded-plate heat exchanger, dubbed Heatex, which features plates made of tantalum CL-Clad. The patented CL-Clad technology involves the brazing of steel onto "reactive" metals, such as tantalum, titanium and zirconium, in order to fabricate columns, reactors and (now) heat exchangers used in corrosive service. Such...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/absorption/Chementator-These-Heat-Exchangers-Feature-Tantalum-as-an-Alternative-to-Graphite_3880.html
May 15, 2008
  FIGURE 1. In a typical system for wastewater treatment, the liquid feed is introduced at the top of the column and steam is introduced at the bottom In recent years, steam strippers have become integral parts of industrial plant operations. The goal when designing these types of columns is to have reliable operation for as long as possible. This article details the methodology used when designing...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Engineering-Practice-Designing-Steam-Stripping-Columns-for-Wastewater_3863.html
April 28, 2008
Caloric Anlagenbau GmbH (Gräfelfing , Germany; www.caloric.com) has signed its first contract for the supply of a carbon dioxide recovery unit using aMDEA-solvent (activated methyl diethanolamine). The plant was ordered by a German engineering company and is part of a syngas treatment facility to be located in Spain. The recovery unit is...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/absorption/Calorics-1st-aMDEA-based-CO2-recovery-plant_3833.html
April 15, 2008
Last month, the first pilot project that used chilled ammonia to capture carbon dioxide from the fluegas (FG) of a coal-fired power plant started operating at the 1,210-MW We Energies’ Pleasant Prairie power plant in Wisconsin. Alstom (Windsor, Conn.; edlinks.che.com/7371-531) designed, built and will operate the 1.7-MW pilot system, which is part of a cost-sharing partnership of 35 utilities...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Chementator-An-ammonia-based-CO2-capture-process-moves-several-steps-closer-to-commercialization_3807.html
April 15, 2008
Packed Columns [1] A packed column is a vertical, cylindrical pressure vessel containing one or more sections of a packing material over whose surface the liquid flows downward by gravity, as a film or as droplets, between packing elements. Vapor flows upward through the wetted packing, contacting the liquid and facilitating absorption of the vapor into the liquid. Packings are offered in either random or...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/absorption/Facts-at-your-Fingertips-Random-Tower-Packing_3792.html
March 15, 2008
Although nanoporous silica membranes are promising systems for the molecular separation of gases and liquids, they lack microstructural stability in the presence of water at temperatures as low as 60°C. Prolonged exposure to water causes hydrolysis, resulting in the formation of large, non-selective pores and cracks in the membrane. On the other hand, polymeric membranes are less prone to damage by...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Chementator-A-promising-nanosieve-for-dehydrating-solvents-and-biofuels_3739.html
March 15, 2008
Alstom Power, Inc. (Windsor, Conn.; edlinks.che.com/7370-571) and The Dow Chemical Co. (Midland, Mich.; edlinks.che.com/7370-572) have established a joint development and...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Chementator-Amine-scrubbing_3743.html
March 15, 2008
An understanding of instrumentation is valuable in evaluating and troubleshooting column performance Instrumentation is critical to understanding and troubleshooting all processes. Very few engineers specialize in this field, and many learn about instrumentation through experience, myth and rumor. A good understanding of the various types of instrumentation used on columns is a valuable tool for engineers...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Feature-Report-Column-Instrumentation-Basics_3729.html
March 15, 2008
Rohm and Haas Co. (Philadelphia, Pa.; edlinks.che.com/7370-578)and Novasep (Nancy, France; edlinks.che.com/7370-579) are forming an exclusive alliance to market and sell...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/ion_exchange/Chementator-Purifying-glycerol_3747.html
March 15, 2008
Separation by a membrane is achieved by creating a boundary between different bulk gas or liquid mixtures. As different solvents and solutes flow through a membrane at different rates, separation is achieved. Here, we will focus on three filtration techniques: microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). These processes are characterized by the size of the particle that can be...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/Facts-at-Your-Fingertips-Membranes_3722.html
March 15, 2008
Ateam of researchers at the U.S. Department of Energy’s Argonne National Laboratory (ANL, Argonne, Ill.; edlinks.che.com/7370-568) has developed a membrane capable of producing olefins from alkanes, and reducing wasted energy and pollutants while improving selectivity and yield. Steam cracking, or pyrolysis, has long been the widespread production method for olefins including ethylene, propylene, and...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/Chementator-Ceramic-ethane-to-ethylene-membrane-could-replace-pyrolysis_3740.html
February 15, 2008
Hitachi Zosen Corp. (Hitz; Tokyo, Japan; edlinks.che.com/7369-531) is commercializing a new membrane for a hybrid-distillation system (HDS) that is especially suitable for dehydrating ethanol and isopropanol. The HDS can produce 99.7 vol.% ethanol from ethanol-water mixtures with 10 vol.% H2O at a dehydration rate of 50 kg/m2/h/atm (at 130°C), which is more than two times higher than conventional...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/Chementator-New-ceramic-membrane-system-doubles-rate-and-slashes-cost-for-dehydrating-ethanol_3682.html
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