in kerosene) and stripped with 2 mol L-1 NH4OH (25 ºC, one stage, aqueous/organic ratio = 1 v/v). Tungsten was isolated as ammonium paratungstate at very high yield (> 97.5%). The elements were better ...

Department of Chemistry and Biochemistry, Brooklyn College of the City University of New York, 2900 Bedford Ave., Brooklyn, New York 11210, United States Department of Chemistry, The Graduate Center ...

Coatings have significantly improved tungsten carbide tool performance. The first significant advancement came with the development of a thin titanium carbide coating, approximately 5 µm thick, ...

Chemical Engineering is concerned with the design and operation of processes which convert materials and energy into the higher value products we use every day. It understands the processes which ...

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Institute of Sustainability for Chemicals, Energy and Environment (ISCE 2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Singapore 627833, Republic of Singapore ...