Selective disproportionation of olefins using thallium treated molybdenum-alumina catalysts

Autor:	T.P. Kobylinski, H.E. Swift
Rok vydání:	1972
Předmět:	Olefin fiber Ionic radius Inorganic chemistry chemistry.chemical_element Disproportionation Catalysis chemistry Molybdenum cardiovascular system Thallium cardiovascular diseases Physical and Theoretical Chemistry Selectivity Isomerization
Zdroj:	Journal of Catalysis. 26:416-426
ISSN:	0021-9517
DOI:	10.1016/0021-9517(72)90102-9
Popis:	Addition of thallium to alumina results in a reduction of surface acidity (as measured by ammonia adsorption) and the inhibition of double-bond isomerization. Adding thallium to molybdenum-alumina results in the promotion of high selectivity for olefin disproportionation. There are numerous reports of the addition of Group Ia and Ha metals to molybdenum-alumina to promote this selectivity. It has been found that thallium is equivalent to rubidium on a molar basis in its effectiveness for promoting olefin disproportionation selectivity. There is a linear relationship between this selectivity and the ionic radius of monovalent thallium and Group Ia ions. It is suggested that the polarizability of the cation is important for reducing surface acidity. At reaction temperature, there is a linear correlation between ammonia adsorption and disproportionation selectivity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1b2630ee44e1a0d1f9593d2fd1267e72 https://doi.org/10.1016/0021-9517(72)90102-9 Zobrazit plný text záznamu