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December Chementator Briefs

By Edited by Gerald Ondrey |

Catalyst recycling A new process for selectively dissolving either palladium or gold from mixed-metal catalyst systems could offer a way to improve recycling of those materials. In traditional noble-metal recycling with aqua regia (mixture of nitric and hydrochloric acids), metals are often dissolved together, which introduces impurities into the recycled metals. Now scientists at the Georgia Institute of Technology (Atlanta, Ga.; www.gatech.edu) have developed a scheme that combines thionyl chloride with a variety of organic reagents, such as pyridine, N,N-dimethylformamide (DMF), pyrimidine and imidazole, to selectively dissolve either gold or palladium, depending on the solvents chosen and their concentrations. No combination of solvents dissolves platinum, giving the solvent system the ability to separate Au or Pd from Pt in mixed metal catalysts. So far, the researchers have used the solvent system to separate Au and Pd from Pt, and to remove Au from a mixture of Au and Pd. Fructose from fruit Nutritis (Toulouse; www.nutritis.com), in cooperation with Novasep Process (Pompey, both France; www.novasep.com), plans to scale up a new process for producing fructose from apple juice. Details about the process were not disclosed, but…
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Chementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com) launched its latest propane dehydrogenation (PDH) catalyst, Catofin 311, which…

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