Offshore Communications
AccountGuest Edition My Account My Che.com Log In

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

Displaying 21 - 40 of 43 stories.
October 1, 2010
Every distillation engineer west of the River Neretva is familiar with the work of Professor Zarko Olujic. His distillation laboratory at the Technical University of Delft (The Netherlands; www.tudelft.nl) is one of the largest and best facilities in the history of distillation. His work is typically funded by a consortium of companies that, most recently, included Bayer, BASF, Evonik, DSM, Montz...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Zarkos-challenge_6030.html
July 1, 2010
In 1952, 37 companies established Fractionation Research, Inc. (FRI). Most of those original members are now gone or absorbed by other companies. Nevertheless, their goal was to study distillation in columns having diameters and heights that were similar to industrial columns. The columns of the world were getting larger and more numerous and were too often being designed using bench-top apparatuses and...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Seeking-out-difficult-situations_5800.html
June 1, 2010
In a distillation column tray, vapor passes upward through liquid that is flowing across a horizontal perforated plate. Vapor passing through the perforated plate forms a two-phase mixture with the liquid and enables mass transfer contacting. This mixture is typically quite turbulent. Tray design must allow the turbulent liquid to fall away from the rising vapor in the space above the tray, while also...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-Tray-Design_5719.html
June 1, 2010
I have 70 supervisors. It sometimes feels like I am pulled in 70 different directions — north, south, east, west, up, down and inside-out. But even after two years at this job, I can still hold my hand steady — if I put it in a vice. Nevertheless, I feel that I have the best job in the distillation world; I am technical director at Fractionation Research, Inc. (FRI; Stillwater, Okla....
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Propelling-distillation-research_5720.html
May 1, 2010
On March 24, at the American Institute of Chemical Engineers’ (AIChE; New York; http://www.aiche.org) Spring Meeting in San Antonio, Tex., the Separations Division honored the myriad contributions of Dr. Karl T. Chuang. Given the scope and impact of his contributions, we are likewise proud to recognize him here. “Very few chemical engineers have spent as much time at as many chemical...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Recognizing-a-distillation-icon_5616.html
May 1, 2010
A new approach to the design of the downcomer portion of distillation column trays — presented at the recent American Institute of Chemical Engineers (AIChE) Spring 2010 meeting (San Antonio, Tex.; March 21–25) — promotes a uniform fluid flow pattern, which improves mass transfer efficiency. The Downcomer Distributor was developed through a joint research program between AMT International...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-tray-downcomer-design-improves-mass-transfer-efficiency_5627.html
April 1, 2010
I read with great interest your article, Kettle Troubleshooting (February, pp. 26–33). The authors are to be congratulated on a very in-depth and timely presentation on the effects of boiling two-phase flow in kettle type reboilers. For over 45 years, I have been engaged in the refrigeration industry where refrigeration engineers are often challenged in designing evaporators to avoid liquid...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Kettle-troubleshooting-Discussions-with-the-author_5557.html
September 17, 2009
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 worldwide, as well as...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/UOP-to-offer-Raschig-Super-Pak-structured-packing-equipment_5074.html
July 1, 2009
“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 Mark Pilling, manager of technology with Sulzer Chemtech (Tulsa, Okla.). To help processors do this, separation-technology providers strive to maintain a strong base of engineering expertise to assist customers in...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Separation-More-More-More_4928.html
June 1, 2009
A new correlation that matches most commercial trays The sieve tray has been in the distillation market place for many decades. It has been used extensively in distillation columns worldwide as a highly efficient vapor-liquid-contacting device. Many people have examined dry tray pressure-drop data for sieve tray decks and there have been several attempts to correlate these data. But the error of such...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Dry-Tray-Pressure-Drop-Of-Sieve-Trays_4816.html
February 1, 2009
For separating two components with similar volatilities, extractive distillation is typically used, whereby a high-boiling, non-volatile solvent is added to "break the azeotrope" — a process that is both energy intensive and often involves the use of hazardous solvents. In an effort to reduce the energy requirements and avoid the use of hazardous solvents used in extractive distillation, an...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Chementator-Progress-on-a-promising-separation-technology_4520.html
January 1, 2009
Here, we present criteria needed for the intelligent, effective specification of trays for a distillation or stripping column. Among the key parameters and accessories during specification are column diameter, tray spacing, number of trays, number of passes, type of downcomers, weir heights, provision of downcomer backups, tray pressure drops, design of bottom seal pan, column bottom arrangement, and...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Tray-Column-Design_4443.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
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
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.che.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.che.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.che.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.che.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.che.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.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-How-to-Specify-and-Install-Cartridge-Trays_3090.html
Pages: « Previous  1 [2] 3 Next »

Get more from Che.com
Get email updates in your inbox

 

Subscribe to:
Chemical Engineering Magazine

Chemical Engineering Magazine and Archives

Plant Cost Index

Join us on... Twitter LinkedIn

LinkedIn Groups

Our LinkedIn group is now over 21,000 members strong!

  1. Join other CPI professionals from all over the globe and share best practices, expertise, concerns and more.
  2. Provide feedback to Chemical Engineering Editors


Current members represent Worley Parsons, DuPont, SABIC, Fluor, Air Products, LyondellBasell, Nalco, Dow Chemical, Dow Corning, BASF, Jacobs Engineering, ExxonMobil, Shell, Chevron and more.

Join Now



We also offer the following subgroup for more targeted discussions:

Tools
Search the Buyers' Guide

Plant Cost Index

Facts at Your Fingertips (archive)

Ask the Experts

Back Issues
X
To access this area, please log in or create an account.
Username:
Password:
Forgot your password?
Request it now.
Processing...