| 摘要 |
The invention relates to a process for dewaxing an atomspheric or a vacuum gas oil in the presence of at least one catalyst comprising: a/ 2 to 99.4% by weight of a synthetic crystalline zeolite of the ferrisilicate type, the approximate chemical formula of the zeolite being M2/nO, Fe2O3, xSiO2 where M represents a proton and/or a metal cation, n is the valence of M and x is a number ranging from 40 to 1,000, the zeolite having been synthetized in a fluoride medium and showing a fluorine content ranging from about 0.01 to 1.6% by weight, the zeolite having an X-ray diffraction diagram represented in Table 1 of the description; b/ 0.1 to 97.5% by weight of a matrix; and c/ at least one promoter selected from the group consisting of Pd, Pt, NiO, CoO, MoO3 and WO3.
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