Multistage removal of heteroatoms and wax from distillate fuel

Details Multistage removal of heteroatoms and wax from distillate fuel Multistage removal of heteroatoms and wax from distillate fuel

2007-10-16

2007-10-16

Caldarola, Glenn (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

C208S027000

Reexamination Certificate

active

10938301

ABSTRACT:
A distillate fuel feed is hydrotreated to remove heteroatoms and then separated into light and heavy hydrotreated fractions, with the heavy fraction catalytically dewaxed to improve low temperature properties. The hydrotreating and dewaxing are conducted in separate stages, which may be in the same reactor vessel. Fresh hydrogen may be passed into the dewaxing stage, with the dewaxing stage gaseous effluent then passed into the hydrotreating stage to provide hydrogen for the hydrotreating. Existing hydrotreating reaction vessels and facilities may be retrofitted to add one or more dewaxing stages.

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