Catalyst dewaxing process using a slurry phase bubble column reactor
AssigneeMobil Oil Corporation
InventorsAnthony Y. Kam, James C. Kuo, Quang N. Le, Jonah Smith
Life of this patent
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Abstract
Dewaxing a waxy feedstock is achieved by dispersing dewaxing catalyst particles within the liquid waxy feedstock and removing gaseous products out of contact with the catalyst by purging a gas stream through the liquid feedstock.
Claims14
A process for dewaxing a liquid hydrocarbon feedstock comprising dispersing within said liquid hydrocarbon feedstock a particulate solid dewaxing catalyst, said dewaxing catalyst freely movable within said liquid hydrocarbon feedstock and treating in a reaction zone said liquid hydrocarbon feedstock with said dewaxing catalyst dispersed therein under conditions of temperature and pressure sufficient to effect dewaxing of said liquid hydrocarbon feedstock, thereby also forming hydrocarbon gases in contact with said catalyst, and continuously removing said hydrocarbon gases from contact with said catalyst wherein said hydrocarbon gases are removed from contact with said catalyst by purging said gases from said liquid hydrocarbon feedstock with a hydrocarbon free gas.
In a hydrodewaxing process for dewaxing a liquid hydrocarbon feedstock in which said liquid hydrocarbon feedstock, hydrogen and a particulate solid dewaxing catalyst are present in an intimate three-phase contacting relationship, said hydrodewaxing process being conducted under conditions of temperature and pressure sufficient to affect dewaxing of said liquid hydrocarbon feedstock, thereby also forming conversion products lighter than said liquid hydrocarbon feedstock in which said lighter conversion products compete with said heavier feedstocks for access to said dewaxing catalyst, the improvement comprising:
- removing said lighter conversion products prior to contact with said dewaxing catalyst, said removing comprising purging a hydrocarbon free gas through said liquid hydrocarbon feedstock during said hydrodewaxing process.
Dependencies are inferred from the claim text.