Lubricating oil process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Jun 20, 1991
filing date -
Jun 20, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improvement has been found in a process for producing Bright Stock from petroleum residuum by propane deasphalting and solvent refining. The extract of solvent refining is cooled to yield an aromatics-lean secondary raffinate which is recycled to propane deasphalting. An improved yield of Bright Stock is achieved over recycling extract to propane deasphalting.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully