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Separation Processes

One-stage Filtration for Silicone Production

Presented here is a fast and flexible solution that removes solids, traces of water and gel in a single operation, therefore significantly reducing the time it takes to perform the process during silicone production Reliable silicone manufacturing operations depend on…

Global cement industry supports startups in drive to achieve ‘net zero’ by 2050

Last month, the Global Cement and Concrete Association (GCCA; London, U.K.; https://gccassociation.org) revealed the first six startups that will be backed by its member companies as part of the first ever Innovandi “Open Challenge” in the race to achieve “net…

New Membranes Support Sustainability Trends

Advances in membrane technologies allow processors to delve into gas- and water-separation applications more effectively and efficiently Conventional membranes have a reputation for being “finicky” and “high maintenance” because they don’t operate well under high pressures or temperatures, are subject…

PFAS separation-concentration system introduced in North America

A technology initially developed in Australia by OPEC Systems (Emu Plains, NSW, Australia; www.opecsystems.com) for separating and concentrating per- and polyfluoroalkyl substances (PFAS) in a range of water applications has now been introduced in North America. The technology, known as…

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Applying capacitive deionization for critical-metals recovery

Researchers at Argonne National Laboratory (Lemont, Ill.; www.anl.gov) are investigating an electrochemical separation process known as capacitive deionization (CDI; diagram) to extract and recover ions from liquid streams in wide-ranging applications, including battery recycling and biomanufacturing. CDI holds several advantages…

Facts At Your Fingertips: Physical Gas-Separation Methods

Industrial gases are critical for a wide range of applications throughout the chemical process industries (CPI). Many of these gases must be separated from others, such as nitrogen from air, or hydrogen from natural gas using physical gas-separation techniques that…

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Should the Doctor Believe a Flowmeter?

Henry Kister shares lessons learned from troubleshooting distillation towers Many cooling-water systems do not have flowmeters. This is a tale about a cooling-water flowmeter that made a difference. As a startup superintendent at ICI Australia in the late 1970s, the…

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Mixed-salt processes target lower-cost CO2 capture

A mixed-salt process (MSP) designed to reduce the costs and increase the energy efficiency of removing carbon dioxide from post-combustion fluegas is advancing in two related projects. In the first, a 10-MW engineering-scale demonstration plant for the MSP is under…

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Gas Trapping Can Unsettle Distillation Columns

Operational troubleshooting guidance is provided for several scenarios involving trapped non-condensable gases in distillation towers Non-condensable gases are often present in distillation towers, either expectedly or unexpectedly. When they do appear, or when the quantity of non-condensable gases varies from…

Selective separation of individual rare-earth elements using DGA-based ligands

Utilizing rare-earth elements (REEs), such as for permanent magnets in renewable energy applications, requires costly chemical separations that generate large volumes of waste. A process featuring new diglycolamide (DGA)-based ligands and liquid-liquid extraction exhibits more effective separation of individual REEs,…