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

Displaying 21 - 40 of 263 stories.
August 1, 2012
New RO membranes with high salt rejection
Five new types of Lewabrane membrane-separation elements for reverse osmosis (RO) are now available. As of July, high-rejection (HR) types with membrane surface areas of 370 and 440 ft2, and high-flow (HF) types, with membrane surface areas of 370, 400 and...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/New-RO-membranes-with-high-salt-rejection_9544.html
July 1, 2012
Design practices committee
Where do middle boilers go? If you answered, “Nobody knows”, then you’re wrong. FRI’s Design Practices Committee (DPC) knows — and they’re willing to share. The DPC was formed in 1975. It originally contained just six members. Neil Yeoman was one of the original members. He still participates on the DPC today — as a consultant. Dan Summers, of Sulzer Chemtech, is...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Design-practices-committee_9458.html
June 1, 2012
Distillation: Avoid Problems During Tower Startup
A variety of performance problems can arise in distillation towers during startup. Many are caused by equipment, hardware or process conditions. Hardware issues may be related to instrumentation, tower internals or ancillaries. Instrumentation malfunctions are also common during startup and are predominantly related to liquid level indicators, online analysis of key components and in some cases...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-Avoid-Problems-During-Tower-Startup_9389.html
May 1, 2012
Magic trays, brown solvent
Every five years or so, a call would come in and once again I would be troubleshooting a certain extraction unit in Canada — usually in the dead of winter. This particular unit had a liquid-liquid extractor, a stripper, a vacuum regenerator and the usual complement of pumps, pipes, valves, vessels, heat exchangers, raccoons and crows. Some of you might remember the extractor from my Crow’s Nest...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Magic-trays-brown-solvent_9297.html
April 1, 2012
Thermal Integration Of Reboilers
The approaches currently used by process integration specialists to assess the opportunities for the integration of reboilers are frequently erroneous and lead to proposals that have to be rejected at the detailed engineering stages or worse, to commissioned reboilers that do not perform properly. This article examines the integration of both vertical and horizontal thermosiphon reboilers, and covers the...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Thermal-Integration-Of-Reboilers_9180.html
April 1, 2012
Acid gas absorption expert
I will bet that many readers are familiar with a Teddy Roosevelt quote that includes the following: “It is not the critic who counts…the credit belongs to the man who is actually in the arena...” Ralph Weiland has been in the arena for many years, doing chemical engineering work that has benefitted many people. At the Spring AIChE meeting this month (Houston; April 1–5), the...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/absorption/Acid-gas-absorption-expert_9156.html
March 1, 2012
Packing must fail
For the first half of my career, I worked in a group that developed, designed and sold distillation trays. Late during the 1970s, half of that group’s business disappeared — almost overnight — when structured packing replaced trays in very large ethylbenzene-styrene vacuum columns. Even the best of trays could not compete with the low pressure drops of structured packings. In 1985, Norton...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/Packing-must-fail_9031.html
March 1, 2012
Distillation Optimization By Vapor Recompression
Distillation is one of the most extensively used operations in the chemical process industries (CPI). It is a highly energy-intensive unit operation, and continuously rising energy costs make it imperative to look for ways to reduce energy requirements. Some energy-saving configurations can increase capital investment costs, so the benefits need to be weighed carefully. Various techniques, such as heat...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/distillation/Distillation-Optimization-By-Vapor-Recompression_9064.html
March 1, 2012
This filter media performs sterilizing-grade bacteria retention
Sterilizing-grade filters from this company have all-metal construction, and can perform filtration that meets the requirements of ASTM standard F838-05 for bacterial retention. The sintered, porous-metal filter...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/This-filter-media-performs-sterilizing-grade-bacteria-retention_9047.html
March 1, 2012
Hollow-fiber membrane modules for ultrafiltration applications
Introduced to the Spanish market last month, the Targa II hollow-fiber ultrafiltration cartridge is suitable for a wide range of ultrafiltration applications, including industrial water...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/Hollow-fiber-membrane-modules-for-ultrafiltration-applications_9049.html
February 28, 2012
How to Disperse Gases in Liquids
Click here for full pdf version of this article...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/How-to-Disperse-Gases-in-Liquids_9085.html
February 1, 2012
A large pressure filter for the alumina industry
The Larox VPF (vertical pressure filter) is used for the pregnant liquor polishing stage in the alumina process, producing both a high-quality product and a high throughput. Low impurity in pregnant...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/A-large-pressure-filter-for-the-alumina-industry_8970.html
February 1, 2012
A system to safely charge, filter, dry and discharge potent APIs
The GFD (glass filter dryer) FilterBox containment system is a small-scale solution to this company’s larger FilterBox products. The FilterBox consists of an agitated nutsche filter dryer (ANFD) or GFD completely integrated within a PSL...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/A-system-to-safely-charge-filter-dry-and-discharge-potent-APIs_8973.html
February 1, 2012
Membranes for gas Separation
Limited budgets and the need for high performing operations are causing chemical processors and petroleum and gas refiners to seek out the best bang for their capital dollar. And when it comes to gas processing operations, such as carbon-dioxide removal, hydrogen purification and air separation, experts say today’s membrane technologies compare favorably to other available systems and will continue...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/membranes/Membranes-for-gas-Separation_8939.html
January 1, 2012
A neighborly research organization
At the Chicago AIChE meeting last spring, Henry Kister and Mike Pritchett named the distillation symposium in honor of James R. Fair, who had recently passed away. Fair was probably best known for his leadership of the Separations Research Program (SRP) of the University of Texas at Austin. Fair and Jimmy Humphrey founded SRP in 1984, and a significant part of Fair’s legacy is continued through the...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/A-neighborly-research-organization_8826.html
December 1, 2011
This GC column has a longer lifetime
The TraceGold gas-chromatography (GC) column is equipped with SafeGuard, a system which combines an analytical GC column with a built-in guard column. GC columns are routinely cut to remove contaminant...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/This-GC-column-has-a-longer-lifetime_8762.html
December 1, 2011
This mercury removal powder contains no carbon
Amended Silicates is the name of powder designed for removing mercury from the fluegas of coal-fired power plants. The reagent, which is fully compatible with most...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/adsorption/This-mercury-removal-powder-contains-no-carbon_8744.html
December 1, 2011
A new, easy-to-install filter system
This weighing and feeding specialist has extended its range of equipment with the introduction of the MCF filter system, which is suitable for applications in the animal feed, processed foods...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/A-new-easy-to-install-filter-system_8739.html
November 1, 2011
Collecting dust
One of the biggest issues related to dust collection is compliance with U.S. Occupational Safety Health Administration (OSHA) and U.S. Environmental Protection Agency (EPA) regulations regarding combustible dusts and air quality. And as both agencies up the ante with tighter regulations and more scrutinizing inspections, it is imperative that processors make sure their facilities are meeting the standards...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/Collecting-dust_8622.html
November 1, 2011
Extend air-filtration lifetimes with these filters
The Tri-Flow MERV 16 (minimum efficiency reporting value) filter lifetimes are three to five times longer than that of conventional bag or...
http://www.che.com/processing_and_handling/sep_liquid_liquid_and_gas_liquid/filtration/Extend-air-filtration-lifetimes-with-these-filters_8637.html
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