Flexible process for the production of oil bases and middle...

Details Flexible process for the production of oil bases and middle... Flexible process for the production of oil bases and middle...

2007-07-31

2007-07-31

Caldarola, Glenn A. (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C208S028000, C208S058000, C502S066000, C585S264000

Reexamination Certificate

active

10696548

ABSTRACT:
For the production of high quality base oils with production of high quality middle distillates, feedstocks are obtained from the distillation of crude or from units for transformation and refining of the latter, there are provided a converting pretreatment stage of the feedstock and a catalytic dewaxing stage. The converting pretreatment stage occurs in the presence of a catalyst containing at least one noble metal deposited on an acid substrate in particular silica-alumina, to effect hydrocracking and hydroisomerization reactions. The catalytic dewaxing occurs in the presence of a catalyst with a zeolite base that is preferably selected from zeolites of the TON-structural type (theta-1, ISI-1, ZSM-22, KZ-2, NU-10), and the zeolites ZSM-48, ZBM-30, EU-2, EU-11, ferrierite, EU-1 and EU-13, and the catalyst also contains at least one hydro-dehydrogenating element.

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