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New Findings from M.A. Reus and Co-Authors in the Area of Chemical Engineering Reported (Concomitant crystallization for in situ encapsulation of...

July 23, 2014

New Findings from M.A. Reus and Co-Authors in the Area of Chemical Engineering Reported (Concomitant crystallization for in situ encapsulation of organic materials)

By a News Reporter-Staff News Editor at Journal of Engineering -- A new study on Chemical Engineering is now available. According to news reporting out of Rijswijk, Netherlands, by VerticalNews editors, research stated, "Concomitant crystallization leads to process intensification through the synergistic combination of the partial processes of particle formation and encapsulation within a single process step. Both cooling and electrospray crystallization in multi-component solutions were used to create (sub-)micron sized particles of different crystalline materials."

Our news journalists obtained a quote from the research, "Concentrations were varied to control core and shell material. Depending on the relative initial concentrations used, concomitant electrospray crystallization of isonicotinamide and caffeine leads to encapsulated particles. Only limited encapsulation was achieved during concomitant cooling crystallization. Concomitant cooling crystallization of cyclotrimethylenetrinitramine (RDX)-2,4,6-trinitrotoluene (TNT) resulted in separate RDX and TNT particles. Using electrospray crystallization, spherical nano-particles were produced, for which the component distribution within the particles could not be determined. Whereas crystallization from bulk solvent starts with a nucleus that grows gradually outward, whereby heterogeneous growth of a coating material on this core particle is not guaranteed, it appears that crystallization from evaporating solvent droplets starts at the surface of the droplets, and moves gradually inward. The resulting RDX-TNT powders have been tested for impact and friction sensitivity."

According to the news editors, the research concluded: "The impact sensitivity has decreased compared to the raw materials, and the friction sensitivity did not change."

For more information on this research see: Concomitant crystallization for in situ encapsulation of organic materials. Chemical Engineering and Processing, 2014;80():11-20. Chemical Engineering and Processing can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier -; Chemical Engineering and Processing -

Our news journalists report that additional information may be obtained by contacting M.A. Reus, TNO Def Secur & Safety, Dept. of Energet Mat, NL-2280 AA Rijswijk, Netherlands. Additional authors for this research include G. Hoetmer, A. van der Heijden and J.H. ter Horst.

Keywords for this news article include: Europe, Rijswijk, Netherlands, Chemical Engineering

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Source: Journal of Engineering

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