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

Displaying 41 - 49 of 49 stories.
September 1, 2007
Mitsubishi Materials Corp. (edlinks.che.com/6899-535), with the project support of Petroleum Energy Center, Japan, (both Tokyo), has developed a new thermal process that uses supercritical (SC) water to crack vacuum distillation residue oil (VR) into clean, lighter oil with a high yield. The lighter oil products from the new process have less metal impurities than alternative cracking processes and the...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Supercritical-water-cracks-residue-oil_3360.html
August 1, 2007
    In multicomponent systems, equation-of-state (EOS) methods generally do a good job of determining vapor-phase properties. But accurate determination of properties for the liquid phase is much more difficult, especially when the liquid contains dissimilar molecules, polar molecules such as alcohols and glycols, or acid gasses such as H2S and CO2.   In this article, a multicomponent system...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/VLE-Calculations-in-Multicomponent-Systems_3138.html
July 1, 2007
    Most columns shut down without fires. Yet most refineries and chemical plants at some time or another have experienced spontaneous or hot work ignitions in at least one column. When this occurs inside a column during or after shutdown, the results can be devastating and dangerous. This paper concentrates on the fires related to packing in columns.   Many refineries and chemical plants...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Causes-and-Prevention-of-Packing-Fires_3124.html
February 1, 2007
    The equilibrium phase distribution ratio (K value) is necessary for designing and assessing the performance of distillation columns. This paper proposes a simplified approach to calculate the K value that is suitable for preliminary design work and for checking the performance of existing columns. The article also explains the first principles for calculation of K values from the fugacity of...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Estimating-Equilibrium-Phase-Distribution-Ratios_3129.html
September 1, 2006
    Distillation, based on differences in the volatility of components, is the most common unit operation for separating homogeneous mixtures. In simple distillation columns, a single feed stream is separated into two product streams. Complex columns are those that involve either two feed streams or three product streams - a side-stream in addition to the top and bottom products. These complex...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Optimization-of-Complex-Distillation-Columns_2821.html
April 1, 2006
    Cartridge trays, defined below, can be the perfect hardware solution for distillation columns that are less than 3 feet (0.9m) in diameter and have a unique need for trays. Packing is usually the preferred choice for small-diameter columns, but there are several circumstances in which trays are advantageous. Examples include fouling systems, certain foaming systems, high-pressure applications...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-How-to-Specify-and-Install-Cartridge-Trays_3090.html
March 1, 2006
    Minor components trapped in distillation columns can react to form solids that cause major problems. The conventional responses to this situation focus upon dealing with the solids after they have become formed. A better strategy consists of preventing or minimizing the solids formation in the first place, by changing the column operating conditions.   Understanding the situation The...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Minimize-Trapped-Components-in-Distillation-Columns_3089.html
January 1, 2006
Ultrasound Brewery Co. (Naruto, Japan; edlinks.che.com/5825-535) has developed a process that separates the water from dilute solutions of alcohol to achieve 99.5%, without using conventional evaporation or distillation. The company has tested the process in a pilot plant that produces 600–700 L/d of 99.5% ethanol from a 10–15% solution. The process, which combines irradiation with ultrasound...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Chementator-Purifying-ethanol-without-distillation_2879.html
January 1, 2006
Process System Enterprise Ltd. (PSE; London, U.K.; edlinks.che.com/5825-542) has launched the latest of a series of gPROMS Advanced Model Libraries (AMLs) for Gas-Liquid Contactors (GLCs). This “open model” library of high-fidelity, non-equilibrium-component models covers a wide range of gas-liquid-separation operations, including conventional packed columns for...
http://www.chemengonline.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Modeling-gas-liquid-separation_2883.html
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