Catalytic dewaxing of lubes in reactor fractionator

Patent · Tue Jul 22 00:00:00 EDT 1980

OSTI ID:5114632

Chen, N; Wang, I

A process is described for catalytic, shape selective hydrodewaxing of lubricating oil fractions with improved viscosity index of the lubricating oil product. The process comprises introducing such fraction to an intermediate point in a vertical column of a hydrodewaxing catalyst maintained at hydrodewaxing conditions, introducing hydrogen to said column below said intermediate point for flow upwardly in said column, maintaining a temperature gradient in said column from a maximum below said intermediate point to a minimum thereabove whereby higher boiling constituents of said fraction are caused to flow downwardly as liquid countercurrent to said hydrogen at conversion conditions while lighter constituents of said fraction and conversion products are caused to flow upwardly as vapor concurrent with said hydrogen resulting in dewaxing conversion of different constituents at different levels of sever ity, withdrawing liquid lubricating oil products from the bottom of said column and withdrawing from the top of said column distillate lubricating products having improved viscosity index by reason of lower severity of treatment as compared with the same fraction when so treated at the same severity as that applied to said higher boiling constituents.

• Assignee: Mobil Corp
• Patent Number(s): US 4213847
• OSTI ID: 5114632
• Resource Relation: Patent File Date: Filed date 16 May 1979
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
04 OIL SHALES AND TAR SANDS
LUBRICATING OILS
DEWAXING
BITUMENS
COAL LIQUIDS
DEMETALLIZATION
DENITRIFICATION
DESULFURIZATION
DISTILLATION EQUIPMENT
HYDROCRACKING
SHALE OIL
TEMPERATURE GRADIENTS
VISCOSITY
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUELS
LIQUIDS
LUBRICANTS
MINERAL OILS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PYROLYSIS
SEPARATION PROCESSES
TAR
THERMOCHEMICAL PROCESSES
010400* - Coal
Lignite
& Peat- Processing
020400 - Petroleum- Processing
040404 - Oil Shales & Tar Sands- Purification