| 摘要 |
In a hydrodewaxing process wherein wax-containing hydrocarbon feedstock is passed over a zeolite dewaxing catalyst in the presence of hydrogen under dewaxing conditions of elevated temperature and pressure, said catalyst comprising alkali metal zeolites having a silica to alumina greater than about 12, a constraint index of about 1 to 12, and an initial alpha value less than about 2; the improvement which comprises: forming a mixture of the alkali metal zeolite with alumina and steaming the mixture at a temperature of at least about 300 DEG C. for at least two hours to increase alpha value.
|
