Chemical Engineering :: Article Archives :: Processing & Handling

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October 1, 2010

As demand for rare-earth metals in a wide range of technology applications continues to increase, efforts to reestablish mining and production of rare-earth elements (REEs) is underway outside China, currently the dominant force in REE production. Future supplies of REEs and the myriad products in which they appear will depend less on absolute geological reserves and global trade politics and more on...
http://www.che.com/processing_and_handling/engineering_materials/Rare-Earth-Metals-For-the-Future_6032.html

April 1, 2010

Commercial production of carbon nanotubes

This month, Showa Denko K. K. (Tokyo, Japan; www.sdk.co.jp) will begin marketing its carbon-nanotube (CNT) product, tradenamed...
http://www.che.com/processing_and_handling/engineering_materials/Commercial-production-of-carbon-nanotubes_5554.html

September 1, 2009

Measuring Dust and Fines In Polymer Pellets

Plastics are most commonly produced and sold in pellet form due to the superior handling characteristics of pellets in downstream applications. From the moment the polymer is pelletized from its molten state, the pellets or granules undergo a series of handling steps as they move from the producer to the consumer. For instance, post-pelletization steps include: • Hydraulic conveying • Drying...
http://www.che.com/processing_and_handling/engineering_materials/Measuring-Dust-and-Fines-In-Polymer-Pellets_5028.html

September 1, 2009

ISA Show Preview

The Instrument Society of America (ISA) 2009 exhibitor show Expo 2009 will be held October 6–8 at the Reliant Center in Houston. Over 300 exhibitors are expected to display automation-and-control technology products and services. The show is organized into six different tracks, including categories for safety, process automation and control, as well as a new section on energy and the environment. In...
http://www.che.com/processing_and_handling/engineering_materials/ISA-Show-Preview_5055.html

August 1, 2009

A replacement for Cr+6

Aculon, Inc. (San Diego, Calif.; www.aculon.com) has developed a formulation of its proprietary SAMP technology (Self-Assembled Monolayer of Phosphate) that can be used as an alternative to hexavalent chromium used in primers and conversion coatings to increase the adhesion of coatings to surfaces. The new...
http://www.che.com/processing_and_handling/engineering_materials/A-replacement-for-Cr+6_4957.html

August 1, 2009

Diamond lubricant cuts friction and increases equipment life

The lifetime of steel bearings can be extended by up to eight times by a new synthetic diamond lubricant, according to its developer, NanoLube, Inc. (Lombard, Ill.; www.diamondlube.com). The lubricant consists of 0.1–4-nm diamond spheres that are dispersed in a light carrier oil (about 5 wt.%) and coated onto the bearings and other friction-prone surfaces of a machine. When the machine is activated...
http://www.che.com/processing_and_handling/engineering_materials/Diamond-lubricant-cuts-friction-and-increases-equipment-life_4961.html

July 1, 2009

Making solar panels even greener

Last month, Malibu GmbH & Co, KG (Bielefeld, Germany; www.malibu-solar.de) started up a thin-film photovoltaic-module fabrication facility that is claimed to be the world’s first to eliminate the use of nitrogen trifluoride...
http://www.che.com/processing_and_handling/engineering_materials/Making-solar-panels-even-greener_4911.html

June 1, 2009

Specialty Metals

One of the most important factors to consider when evaluating a specialty metal for use in valves, fittings and instrumentation is its corrosion resistance or corrosion rate of the metal in the target media. Each material discussed here has its own niche, and depending on the processing environment and the needs of the application, the metal’s strengths and weaknesses may or may not be suitable. In...
http://www.che.com/processing_and_handling/engineering_materials/Specialty-Metals_4813.html

May 1, 2009

Reducing foundry emissions

Cast parts, such as engine blocks, are typically made by pouring molten metal into so-called cores — sand-based molds that have internal passages for the component to be cast. Such casting cores are typically made by reacting sand with organic binders in a curing process. In recent years, industry has been seeking alternatives to organic binders to avoid releasing toxic emissions during curing. Last...
http://www.che.com/processing_and_handling/engineering_materials/Reducing-foundry-emissions_4778.html

May 1, 2009

Spinning yarns of CNTs

The exceptional properties of carbon nanotubes (CNTs), such as high tensile strength and high thermal and electrical conductivities, have suggested a number of applications, including lightweight materials for ballistics protection, actuators for muscles or artificial muscles, filaments for light sources, electrodes, super-capacitors, and flow sensors. So, many researchers have tried to prepare macroscopic...
http://www.che.com/processing_and_handling/engineering_materials/Spinning-yarns-of-CNTs_4783.html

April 1, 2009

Chementator: Sonopolymerization as a means to manufacture composite nanoparticles

Many methods have been developed for the encapsulation of "active" materials within a carrier nanoparticle, such as a polymer. These composite structures can be used in many biomedical, cosmetics, and food processing applications for the controlled release of pharmaceuticals, neutraceuticals, and flavors. However, most of the proposed encapsulation methods developed so far involve multiple steps...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Sonopolymerization-as-a-means-to-manufacture-composite-nanoparticles_4671.html

April 1, 2009

Chementator: A less expensive way to make conductive coatings

Cambrios Technologies Corp. (Sunnyvale, Calif.; www.cambrios.com) has formed a strategic partnership with Chisso Corp. (www.chisso.co.jp) and Sumitomo Corp. (both Tokyo; www.sumitomocorp.co.jp) for commercialization of Cambrios’ first product, ClearOhm coating material. Targeted for the liquid crystal display (LCD) market, ClearOhm is seen as a solution to some of the problems with the currently...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-less-expensive-way-to-make-conductive-coatings_4673.html

March 1, 2009

Chementator: A new feedstock for carbon and graphite electrodes: coal

A less-expensive way of making the raw materials for carbon anodes (for aluminum smelting) and graphite electrodes (used to make steel in electric arc furnaces) has been developed by West Virginia University (UWV; Morgantown, W.Va.; www.wvu.edu). The conventional starting materials for making electrodes are needle-grade coke (from petroleum) and binder pitch, which comes from petroleum distillation residue...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-new-feedstock-for-carbon-and-graphite-electrodes-coal_4596.html

January 1, 2009

Mechanical Carbon In Chemical Processing Equipment

Frequently, in chemical processing equipment it is possible to place the shaft support bearings in the chemical that is being processed. In some cases, this precludes the use of oil- or grease-lubricated bearings because the operating conditions are not conducive to the use of such materials. For example, bearings that are lubricated with oil or grease can be problematic when submerged in liquids such as...
http://www.che.com/processing_and_handling/engineering_materials/Mechanical-Carbon-In-Chemical-Processing-Equipment_4447.html

January 1, 2009

Chementator: Mass-production technology for making functionalized organic nanotubes

Researchers at the Nanotube Research Center of the National Institute of Advanced Industrial Science and Technology (AIST; Tokyo; www.aist.go.jp) have developed a process for making organic nanotubes of metal complexes (photo, left). The scientists have produced organic nanotubes with metal ions (Zn+2, Cu+2, Co+2, Ni+2, Fe+2 and Mg+2) complexed at the inner and outer surfaces of organic nanotubes (diagram...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Mass-production-technology-for-making-functionalized-organic-nanotubes_4458.html

January 1, 2009

Chementator: A new PFSA polymer for membrane and other applications

Solvay Solexis S.p.A. (Bollate, Italy; www.solvaysolexis.com) has commercialized a new perfluorosulfinic acid (PFSA) polymer, tradenamed Aquivion, which was specifically designed for polymer electrolyte membrane (PEM) fuel cells. Aquivion ionomer...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-new-PFSA-polymer-for-membrane-and-other-applications_4460.html

January 1, 2009

Chementator: A hard coating promises to reduce wear and power use in rotating equipment

Researchers at the U.S. Dept. of Energy’s (DOE; Washington, D.C.) Ames Laboratory (www.ameslab.gov) and Iowa State University (both of Ames, Iowa) have developed a hard, smooth coating that can be applied to industrial equipment, such as pumps, gears and cutting tools, to reduce friction and extend the life of the equipment. Ames has been working with various companies, including Eaton Corp...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-hard-coating-promises-to-reduce-wear-and-power-use-in-rotating-equipment_4461.html

December 1, 2008

Chementator: Nanocomposite

AkzoNobel Polymer Chemicals LLC (Chigago, Ill.; www.akzonobel.com/polymer) has launched Perkalite, a new range of synthetic, layered double-hydroxide (LDH) organoclays. With proper compounding, the LDH organoclays delaminate to nanoscale...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Nanocomposite_4397.html

November 13, 2008

DuPont opens new facility to serve growing titanium metals industry

Yesterday, DuPont announced that a new titanium tetrachloride purification unit has begun operations at the New Johnsonville, Tenn., titanium dioxide site. Most of the production of the high purity chemical will be used in the growing titanium metal manufacturing industry. Plans for the $30 million facility were announced in October 2006. Titanium metal increasingly is being used in everything...
http://www.che.com/processing_and_handling/engineering_materials/DuPont-opens-new-facility-to-serve-growing-titanium-metals-industry_4352.html

November 1, 2008

Chementator: Bringing the corrosion resistance of tantalum to off-the-shelf stainless-steel parts

Tantaline (Lyngby, Demnark; www.tantaline.com) has developed a process that creates a surface alloy of tantalum on a metal substrate (typically stainless steel). As a result, the surface acquires the corrosion resistance of tantalum — the most corrosion resistant metal commercially available — without having to fabricate complicated parts from the expensive metal. Unlike alternative...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Bringing-the-corrosion-resistance-of-tantalum-to-off-the-shelf-stainless-steel-parts-_4336.html

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