Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1988-04-11
1989-08-01
Caldarola, Glenn
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208111, 502 52, C10G 4564, C10G 4500
Patent
active
048531030
ABSTRACT:
A catalytically dewaxed lubricating oil of improved oxidation stability is produced by catalytically dewaxing and hydrotreating the dewaxed product with a hydrotreating catalyst which has been oxidatively regenerated. The use of oxidative regeneration provides a hydrotreating catalyst which effectively sorbs aromatic components, especially the polycyclic aromatic liquids formed during the hydrogen activation of the dewaxing catalyst which pass out of the dewaxing reactor during the initial stages of each dewaxing cycle.
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Caldarola Glenn
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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