Rafi D Jalkian22 Broad St, Gibbstown, NJ 08027

7241621, Jul 10, 2007

Oct 18, 2002

10/274070

Paul Thomas Reischman - Lambertville NJ, US
Rafi Jalkian - Gibbstown NJ, US

ExxonMobil Research and Engineering Company - Annandale NJ

G01N 31/00
G01N 21/00

436 60, 436164, 436170

A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating residual fuel and insolubles contamination in marine diesel lubricating oils. The method includes the steps of: (a) obtaining spectral raw data over a frequency range substantially equivalent to that of ultraviolet-viable light for reference lubricating oil samples with known properties and concentrations of residual fuel and insolubles; (b) performing chemometric techniques to the spectral raw data obtained in step (a) to develop a calibration model and calibrate the spectral data with actual values for parameters reflecting the level of residual fuel and insolubles contamination of the reference samples, the actual values determined by means of conventional analytical methods; (c) obtaining spectra of samples of marine diesel lubricating oil of unknown concentration of residual fuel and insolubles over a frequency range substantially equivalent to that of ultraviolet-viable light; and (d) processing the obtained spectral raw data of step (c) and applying the developed calibration model to the processed data in order to determine the parameters reflecting the level of residual fuel contaminants and insolubles present in the marine diesel lubricating oil.

7407809, Aug 5, 2008

Jun 1, 2007

11/809457

Paul Thomas Reischman - Lambertville NJ, US
Rafi Jalkian - Gibbstown NJ, US

ExxonMobil Research and Engineering Company - Annandale NJ

G01N 31/00
G01N 21/00

436 60, 436164, 436170

A method for determining contamination in marine diesel lubricating oils. The method has been found to have particular utility in estimating asphaltenes contamination in marine diesel lubricating oils. The method includes the steps of: (a) obtaining spectral raw data over a frequency range substantially equivalent to that of ultraviolet-visible light for reference lubricating oil samples with known properties and concentrations of asphaltenes; (b) performing chemometric techniques to the spectral raw data obtained in step (a) to develop a calibration model and calibrate the spectral data with actual values for parameters reflecting the level of asphaltenes contamination of the reference samples, the actual values determined by means of conventional analytical methods; (c) obtaining spectra of samples of marine diesel lubricating oil of unknown concentration of asphaltenes over a frequency range substantially equivalent to that of ultraviolet-visible light; and (d) processing the obtained spectral raw data of step (c) and applying the developed calibration model to the processed data in order to determine the parameters reflecting the level of asphaltenes present in the marine diesel lubricating oil.

5304522, Apr 19, 1994

Jun 1, 1993

8/069486

Rafi Jalkian - Mantua NJ
Tomas R. Melli - Sewell NJ

Mobil Oil Corporation - Fairfax VA

B01J 2034
B01D 1504
C01B 719
C07C 260

502 22

A process is disclosed for regenerating a spent liquid acid catalyst comprising the steps of: (a) providing a spent liquid acid catalyst comprising HF, sulfolane, and conjunct polymeric byproducts formed during the HF-catalyzed reaction of isoparaffin and olefin to form isoparafinnic alkylate; (b) providing a finely divided solid sorbent, wherein said solid sorbent preferentially and reversibly sorbs said conjunct polymeric byproducts from a mixture containing HF, sulfolane; (c) mixing said spent liquid acid catalyst of step (a) with said solid sorbent of step (b) by charging said spent liquid acid catalyst to the driving fluid inlet of an eductor and drawing a stream containing said solid sorbent into said eductor; (d) holding said mixture of step (c) in contact for time sufficient for said solid sorbent to preferentially sorb at least a portion of said conjunct polymeric byproducts from said spent liquid acid catalyst to produce a conjunct polymer-enriched sorbent and to regenerate said liquid acid catalyst; and (e) separating said conjunct polymer-enriched sorbent from said regenerated liquid acid catalyst; (f) soaking said conjunct polymer-enriched sorbent in a solvent to desorb said conjunct polymeric byproducts; and (g) recycling said solid sorbent to said mixing step (c).

5407830, Apr 18, 1995

Dec 1, 1993

8/160565

Lawrence J. Altman - Cherry Hill NJ
Rafi Jalkian - Mantua NJ

Mobil Oil Corporation - Fairfax VA

G01N 2135

436 55

A method and system for controlling an HF alkylation system comprising a reactor, a settler, an HF acid regenerator and a source of fresh HF acid wherein a stream of olefins and a stream of isobutanes are contacted in the reactor in the presence an HF acid catalyst. At least the reactor feed is sampled, and the sample is passed to an analyzer using an attenuated total reflectance cell. Signals are generated which are representative of infrared spectra of the samples in a range providing information on the amount of at least one of HF, water, ASO and sulfolane. These signals are simultaneously determined and generated because all absorb in the same spectral region. This aspect provides for viewing these distortions of the main HF absorption band to quantify these three components. The infrared spectra signals are compared with stored signals to generate control signals; and at least one of HF, water and sulfolane fed to the reactor feed is adjusted in response to the control signal.

5264652, Nov 23, 1993

Dec 17, 1992

7/991921

Jonathan E. Child - Sewell NJ
Edward H. Edelson - Cherry Hills NJ
Anagha A. Gupte - Marlton NJ
Rafi Jalkian - Mantua NJ
Tomas R. Melli - Sewell NJ
Sergei Yurchak - Media PA

Mobil Oil Corporation - Fairfax VA

C07C 262
C07C 710

585802

The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of: (a) separating hydrofluoric acid from said mixture to provide an intermediate stream containing less than about 30 percent hydrofluoric acid by weight; (b) gravitationally separating said intermediate stream into a more dense sulfolane-enriched stream and a less dense conjunct polymer-enriched stream; (c) distilling said more dense sulfolane-enriched stream of step (b) to provide an overhead stream containing a higher sulfolane concentration than said more dense sulfolane-enriched stream of step (b) and a bottom stream enriched in conjunct polymers.

5583049, Dec 10, 1996

Apr 17, 1995

8/423336

Lawrence J. Altman - Cherry Hill NJ
Rafi Jalkian - Mantua NJ

Mobil Oil Corporation - Fairfax VA

G01N 2135

436 55

A method and system for controlling an HF alkylation system comprising a reactor, a settler, an HF acid regenerator and a source of fresh HF acid wherein a stream of olefins and a stream of isobutanes are contacted in the reactor in the presence an HF acid catalyst. At least the reactor feed is sampled, and the sample is passed to an analyzer using an attenuated total reflectance cell. Signals are generated which are representative of infrared spectra of the samples in a range providing information on the amount of at least one of HF, water, ASO and sulfolane. These signals are simultaneously determined and generated because all absorb in the same spectral region. This aspect provides for viewing these distortions of the main HF absorption band to quantify these three components. The infrared spectra signals are compared with stored signals to generate control signals; and at least one of HF, water and sulfolane fed to the reactor feed is adjusted in response to the control signal.

5264650, Nov 23, 1993

Dec 17, 1992

7/991919

Michael A. Better - Deptford NJ
Jonathan E. Child - Sewell NJ
Kenneth J. Del Rossi - Woodbury NJ
Edward H. Edelson - Cherry Hill NJ
Anagha A. Gupte - Marlton NJ
Rafi Jalkian - Mantua NJ
Tomas R. Melli - Sewell NJ
Sergei Yurchak - Media PA

Mobil Oil Corporation - Fairfax VA

C07C 268
C07C 710

585802

The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of: (a) separating hydrofluoric acid from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid to provide a first intermediate stream containing less than about 30 percent hydrofluoric acid by weight; (b) mixing said intermediate stream with a nonpolar extraction solvent to provide a second intermediate stream; and (c) gravitationally separating said intermediate stream into a less dense extract stream enriched in conjunct polymers and a more dense liquid stream enriched in sulfolane.