Lube catalytic dewaxing-hydrotreating process
This patent describes a method of producing a catalytically dewaxed, hydrotreated lubricating oil of improved quality. It comprises: catalytically dewaxing a hydrocarbon lubricating oil fraction by contacting the fraction during a dewaxing/hydrotreating cycle with a zeolitic dewaxing catalyst in the presence of hydrogen under dewaxing conditions, to produce a dewaxed effluent, hydrotreating the dewaxed effluent by contacting the effluent during the dewaxing/hydrotreating cycle with a hydrotreating catalyst. The catalyst comprising a metal hydrogen component on a porous non-acidic support in the presence of hydrogen under hydrotreating conditions, to produce a hydrotreated, dewaxed effluent, reactivating the dewaxing catalyst at the end of the dewaxing/hydrotreating cycle contacting the dewaxing catalyst with hydrogen at an elevated temperature to restore dewaxing activity to the catalyst, oxidatively regenerating the hydrotreating catalyst at the end of the dewaxing/hydrotreating cycle by contacting the hydrotreating catalyst with an oxygen containing gas at an elevated temperature to restore hydrotreating activity to the catalyst, repeating the first two steps with the reactivated dewaxing and regenerated hydrotreating catalyst in a new dewaxing/hydrotreating cycle in which aromatic components formed by the hydrogenative reactivation of the dewaxing catalyst in the third step and sorbed on the dewaxing catalyst pass with the dewaxed effluent form the dewaxing catalyst to the hydrotreating catalyst on which they are sorbed during the initial stages of the dewaxing/hydrotreating cycle.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4853103
- Application Number:
- PPN: US 7179727A
- OSTI ID:
- 5393597
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stabilizing and dewaxing lube oils
Catalytic dewaxing-hydrotreating process
Related Subjects
020400* -- Petroleum-- Processing
AROMATICS
CATALYSTS
CHEMICAL REACTIONS
DEWAXING
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGENATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LUBRICANTS
LUBRICATING OILS
MATERIALS
MINERALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PRODUCTION
REGENERATION
SEPARATION PROCESSES
ZEOLITES