| 摘要 |
Catalytic system for dehydrogenating ethylbenzene to styrene, containing chromium oxide, tin oxide, at least one oxide of an alkaline metal (M) and an alumina carrier, in delta or theta phase or in a mixture of delta+theta or theta+alpha or delta+theta+alpha phases, modified with silica, and characterized in that: the chromium, expressed as Cr2O3, is in a quantity of between 6 and 30% by weight; the tin, expressed as SnO, is in a quantity of between 0.1 and 3.5% by weight; the alkaline metal, expressed as M2O, is in a quantity of between 0.4 and 3% by weight, the silica is in a quantity of between 0.08 and 3% by weight, the complement to 100 being alumina.
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