C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
C10G 73/06 (2006.01) C10G 73/22 (2006.01) C10G 73/23 (2006.01) C10G 73/32 (2006.01)
Patent
CA 2184611
A process for solvent dewaxing petroleum feedstock to separate crystallized wax from lubricant oil by filtration of a wax/oil/solvent mixture. The feedstock is sequentially cooled and mixed with cold polar solvent to form a wax crystal phase and oil-solvent phase, and the oil-solvent filtrate stream is contacted with solvent permeable selective membrane at low temperature to recover an internal circulating permeate solvent stream and an oil-rich retentate stream containing dewaxed oil product and residual solvent. Improved operation is achieved by splitting the internal circulating solvent stream into multiple cold solvent recycle streams and injecting a plurality of the cold solvent recycle streams into the waxy petroleum feedstock during sequential cooling and mixing. By initially injecting a cold recycle solvent stream into the waxy petroleum feedstock at a small temperature differential near the wax crystallization temperature, shock cooling a.nd excess small wax crystal formation are avoided.
Un procédé de déparaffinage au solvant de pétrole brut permet de séparer la cire cristallisée de l'huile de lubrification par filtration d'un mélange cire/huile/solvant. Une huile paraffineuse est acheminée à travers une conduite (1) et mélangée à un solvant acheminé par une conduite (2) provenant d'une section de récupération de solvant. Le mélange cire/huile/solvant est amené à un échangeur de chaleur (3) et chauffé pour s'assurer que tous les cristaux de cire sont dissous en une vraie solution. Ce mélange chaud est ensuite amené par la conduite (4) à l'échangeur de chaleur (5) dans lequel il est refroidi.
Gould Ronald Michael
Nitsch Albert Richard
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
LandOfFree
Lubricating oil dewaxing with membrane separation of cold... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lubricating oil dewaxing with membrane separation of cold..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lubricating oil dewaxing with membrane separation of cold... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1429577