| 摘要 |
Process for the preparation of a very pure tertiary olefin, for example isobutene, by decomposition of the corresponding ether, for example tert-butyl methyl ether, in the presence of a catalyst consisting of silica modified by the addition of at least one element or compound of an element chosen preferably from the group consisting of rubidium, caesium, magnesium, calcium, strontium, barium, gallium, lanthanum, cerium, praseodymium, neodymium and uranium, and, optionally, by the addition of at least one element or compound of an element chosen from the group consisting of aluminium, titanium and zirconium.
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