1,721,013 research outputs found
Trattamento della dipendenza da alcol e oppiacei in donne in gravidanza: una mini-review
No full textEAF SLAG TREATMENT FOR INERT MATERIALS PRODUCTION
Full text linkDanieli & C. in collaboration with Politecnico di Milano, designed an innovative, patent pending, treatment plant to solve some issues associated to metals leaching (i.e., Ba, V, and Cr), and high free lime concentration for carbon steel EAF slag, for the production of artificial aggregates featured by mechanical properties suitable for the building purposes. The plant is featured by an innovative pneumatic transport system to convey the stabilizing agent to intercept the molten slag flux during the deslagging operation. The new system promotes stable microstructural phases’ formation, able to retain metallic ions leaching, maintaining the same mechanical properties of the as-cast slag. The main advantages of the new implemented stabilization plant are a simple installation and an easy process operation
Thermal stability and catalytic properties of the Wells-Dawson K6P2W18O62 center dot 10H(2)O heteropoly compound in the oxidative dehydrogenation of isobutane to isobutene (vol 3, pg 387, 1996)
No full textThe thermal stability of the Wells-Dawson heteropoly compound K6P2W18O62. 10H(2)O was examined under both reducing and oxidizing conditions, and its structural and morphological evolution was characterized by several complementary solid state techniques. It is shown that the primary structure of the title compound remains intact up to 770 K, while at higher temperature structural changes and rearrangements are observed. These modifications depend considerably on the treatment conditions and catalyst composition. Under oxidizing conditions the Wells-Dawson compound rearranges with formation of a mixed phase containing the Keggin-type unit K3PW12O40 and the hexatungstate K2W6O19. Furthermore, the catalytic activity in the oxidation of isobutane is affected considerably by these changes. The best catalytic performance was shown by the rearranged Wells-Dawson compound
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