| 摘要 |
Gamma alumina having a sodium content of less than 0.01 weight percent sodium calculated as Na2O and said alumina modified with silicon were found to be superior catalysts for the skeletal isomerization of alkenes having at least four carbon atoms, preferably with 0.01 to 1 mole of water per mole of alkene present during the isomerization. ???-alumina is modified by contact, after dehydration, with a vapourized disiloxane or 2,3-epoxyalkylsilane and then calcination at 300-700 DEG C. |
