Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Reexamination Certificate
2007-08-21
2007-08-21
Nguyen, Tam M. (Department: 1764)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By plural serial diverse separations
C585S833000, C062S635000, C062S625000
Reexamination Certificate
active
10788947
ABSTRACT:
A process for the recovery of high purity hydrogen for recycling to a hydroprocessing or similar unit located in an integrated refinery facility includes sampling and providing analytical information on the make-up of the hydrogen-containing feedstream entering the bottom of a stripping column and the composition of the hydrogen recycle stream at, and/or approaching the top of the stripping column to a computer-directed control system in real time for the purpose of controlling the selection and the volumetric flow rate of one or more “refinery solvents” into the column to maximize the removal of non-hydrogen gases from the feedstream and to thereby maximize the percentage of hydrogen in the recycle gas stream. The “refinery solvent” used in the stripping column is any one or more compounds that are generated as product or by-product streams in the integrated refinery facility that are readily available for diversion in the required quantities for use a solvent to absorb or strip one or more compounds from the hydrogen-containing feedstream at the integrated refinery facility. The refinery solvent is preferable subsequently flashed to remove separated compounds and returned to its original product stream.
REFERENCES:
patent: 4935043 (1990-06-01), Blanc et al.
patent: 5019143 (1991-05-01), Mehrta
patent: 5326929 (1994-07-01), Mehra et al.
patent: 5546764 (1996-08-01), Mehra
Abelman ,Frayne & Schwab
Nguyen Tam M.
Saudi Arabian Oil Company
LandOfFree
Enhanced hydrogen recovery for hydroprocessing units does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced hydrogen recovery for hydroprocessing units, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced hydrogen recovery for hydroprocessing units will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3864987