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Separation Processes

Separation: More, More, More

“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.).…

Advanced Membrane Technologies and Applications, reviewed by Peter S. Cartwright

Advanced Membrane Technologies and Applications Edited by Norman N. Li. Wiley. 111 River St., Hoboken, NJ 07030. Web: wiley.com. 2008. 994 pages. $150.00. Reviewed by Peter S. Cartwright, Cartwright Consulting Co., Minneapolis, Minn. The crossflow-pressure-driven membrane separation technologies of microfiltration,…

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Scaleup is set for an air-separation membrane

The Electric Power Research Institute (EPRI, Palo Alto, Calif.; www.epri.com) has signed an agreement with Air Products (Allentown, Penn.; www.airproducts.com) to support the company’s development of a ceramic ion transport membrane (ITM) for air separation. The membrane is being tested…

Dry Tray Pressure Drop Of Sieve Trays

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…

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Chementator: This new crystallizer reduces damage to larger crystals

With the exception of Oslo-type crystallizers, the main commercial crystallizers are agitated systems that use an agitator [agitated tank or draft-tube baffle (DTB)] or a circulation pump [forced circulation (FC) crystallizers]. In such systems, however, large crystals become damaged by…

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Reduce process consumables with this new separator

Aqueous Recovery Resources, Inc. (ARR; Bedford Hill, NY; www.suparator.com), has developed the Suparator, an oil/water separation system that involves no moving parts or media, for low operational costs and minimal maintenance. The separator (diagram) is based on the Bernoulli effect,…

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Membrane Configurations

  Membrane polymers are packaged into a configuration, commonly called a device or an element. The most-common element configurations (figure) are tubular, capillary fiber, spiral wound, and plate and frame. Tubular Made from ceramic, carbon, stainless steel or a number…

Operate under harsh conditions with ceramic membranes

CeraMem ceramic membranes are a proprietary technology platform provides ceramic membrane performance at comparable lifecycle costs to polymeric membranes. The design, which is a combination of unique materials of construction and novel membrane chemistry, allows the utilization of large-diameter ceramic…

This EDI module also has a membrane stage

Septron Bio-Safe is said to be the world’s first electro-deionization (EDI) module with an integrated membrane stage. It is based on proven and patented spiral-wound technology and has an additional membrane stage for removal of particles and bacteria. The EDI…

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Chementator: Progress on a promising separation technology

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…