Electric Literature of Al2H8O13S3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Aluminum(III) sulfate xhydrate, is researched, Molecular Al2H8O13S3, CAS is 17927-65-0, about Preparation of Ba-doped γ-Al2O3 from kaolin and its characteristics. Author is Lee, H..
The synthesis of γ-Al2O3 powder for catalytic support from kaolin-derived Al sulfate solution was described. Al sulfate hydrate[Al2(SO4)3·nH2O] was precipitated by dropping it into Et alc. The γ-Al2O3 power was prepared by calcination of the precipitate The powder showed thermal stability after calcination at 1000° for 2 h. However, the powder calcined at 1200° for 2 h was fully transformed into γ-Al2O3. Ba-doped γ-Al2O3 samples were prepared by impregnation of γ-Al2O3 with appropriate solution concentrations(mol%) of Ba chloride [Ba]/([Ba]+[Al]). The effect of Ba addition on the thermal stability of the Ba-doped γ-Al2O3 was studied. The amount of the additive was 2-10 mol% with respect to the γ-Al2O3. The additions of 4 mol% and 8 mol% Ba were effective at 1250° and 1450° in retarding the γ-Al2O3 transition due to the formation of Ba hexaaluminate(BaAl12O19). The activation energies of the γ-Al2O3 → α-Al2O3 transition in samples with and without 4 mol% Ba-doped were calculated in accordance with the Arrhenius equation and resulted in 114.5 Kcal/mol and 137.8 Kcal/mol, resp.
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Reference:
Isothiazole – Wikipedia,
Isothiazole – ScienceDirect.com