ExxonMobil Technologies

For the production of hydroprocessed lube base stocks, ExxonMobil has developed two technologies 27 

Both of these produce group II base stocks and the LHDC route can also lead to group III as required. 

The raffinate hydroconversion process, developed by Exxon Research and Engineering,30 was developed to upgrade the solvent refining process at Exxon s 

Objective VI Nitrogen Pour point Saturates color 

FIGURE 7.13 Schematic of ExxonMobil Jurong, Singapore, lubes unit. 

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FIGURE 10.22 ExxonMobil technology base stock VI versus pour point for solvent dewaxing and MSDW-1 and MSDW-2 catalysts. 

BASF,1516 ExxonMobil,33 IFP,12 Gulf (Chevron),11 and Lyondell34 all offer licensed processes for refining of waxes in yields of 99% or better. Recent ExxonMobil technology employs two reactors.35 The products from these processes meet 21 CFR 172.886 for food/medicinal grade waxes. The analytical procedure for this test specification extracts a sample of wax with DMSO/phos-phoric acid, with subsequent measurement of UV absorbances in specific wavelength ranges after extraction into isooctane.36 The limits to be met are shown in Table 11.10. 

ExxonMobil technologies for ultra low sulfur gasoline and diesel-an overview with recent commercial examples. Presented at Instituto Argentine del Petroleo y del Gas Meeting, ExxonMobil Research and Engineering, p. 15. 

The new commercially available technologies concern the removal of sulfur with a minimum lost of octane rating. SCANfming and Prime G+ are the process technologies licensed by ExxonMobil and IFP, respectively. In SCANfining (Fig. 4), the complete naphtha (full range naphtha) is treated, with a proprietary catalyst. 

ExxonMobil extended the Hydrofining technology to produce a 200 ppm diesel, with the Diesel Oil Deep Desulfurization technology, DODD. The reactor is packed with multiple beds of different catalysts. A preceding history of commercial experience provided data to build a model for deep HDS and pave the way to a new technology, MAK Fining. 

This latter technology, MAK process (Fig. 11) is licensed by ExxonMobil, Albermarle, Kellogg, Fina [88], The staged process consists in an adapted combination of different... 

Howard E. Katz, Bell Laboratories, Lucent Technologies James R. Katzer, ExxonMobil... 

J. Brody, F. Hershkowitz and P. J. Berlowtz, Materials Challenge for ExxonMobil s Advanced Stream Reforming Process, Presentation at Materials for the Hydrogen Economy Symposium at 2005 Materials Science and Technology Meeting (2005). 

The catalysts for xylene isomerization with EB dealkylahon are dominated by MFI zeolite. The de-ethylation reaction is particularly facile over this zeolite. There have been several generations of catalyst technology developed by Mobil, now ExxonMobil [84]. The features in their patents include selectivation and two-catalyst systems in which the catalysts have been optimized separately for deethylation of EB and xylene isomerization [85-87]. The crystallite size used for de-ethylation is significantly larger than in the second catalyst used for xylene isomerization. Advanced MHAI is one example. The Isolene process is offered by Toray and their catalyst also appears to be MFI zeoUte-based, though some patents claim the use of mordenite [88, 89]. The metal function favored in their patents appears to be rhenium [90]. Bimetallic platinum catalysts have also been claimed on a variety of ZSM-type zeolites [91]. There are also EB dealkylation catalysts for the UOP Isomar process [92]. The zeolite claimed in UOP patents is MFI in combination with aluminophosphate binder [93]. 

Mohr, G. (2002) XyMax"" ExxonMobil state-of-the-art xylenes isomerization technology, Pre-Print Archive-American Institute of Chemical Engineers, [Spring National Meeting], New Orleans, LA, United States. 

Actual FCCU Technology Advances VIII (Koch. BP, Motiva-Equilon-Deer Park, Marathon, Conoco, Navajo-Montana, Lion CHS, Coastal, Chevron, CITGO, ConocoPhillips, Sunoco, Valero, ExxonMobil)... 

Qatar ExxonMobil and Qatar Petroleum Advanced gas conversion for the 21th centure (AGC-21) technology 154000 2011... 

Peter A. Koen, Stevens Institute of Technology Russell Koveal, ExxonMobil... 

Kenneth A. Pickar, California Institute of Technology David R. Rea, E. I. du Pont de Nemours and Company (retired) Elsa Reichmanis, Lucent Technologies C. E. Rinehart, ExxonMobil... 

Michael Schrage, Massachusetts Institute of Technology William G. Schulz, American Chemical Society David J. Soderberg, BP Chemicals Guangyu Sun, Georgetown University Hans Thomann, ExxonMobil... 

ExxonMobil is now licensing this technology to other refineries. Development of similar applications in other operations is likely. Initially, applications will probably involve relatively easy separations such as the separation of methyl ethyl ketone/toluene from lube oil described above or soybean oil from hexane in food oil production. Long-term, however, the technology may become sufficiently advanced to be used in more important refining operations, such as fractionation... 

Krishnan Sankaranarayanan received his MSc at Delft University of Technology, the Netherlands and his PhD at Princeton University, New Jersey. At Delft, he did an extensive study of the energy efficiency of the polyolefin industry, for which activity DSM acted as host. He is currently group head reactor engineering and mixing at ExxonMobil Research and Engineering, Fairfax, Virginia. 

In gas-to-liquid (GTL) technology, stranded gas (mostly methane) is converted into diesel, kerosene, and naphtha, which are easily transportable. Qatar aims to become the world s GTL center, with production from multiple facilities at the Ras Laffan Industrial City reaching 400,000 barrels/day by 2010 to 2012. Qatar is well positioned thanks to its huge reserves of very attractive gas, lack of oil, and the desire to diversify its product portfolio, and is progressing quickly with its partners ExxonMobil, Shell, and Sasol. The GTL case is harder to make for other regions. 

Texas, Austin H.M. Hubbard, Retired President and CEO, Pacific International Center for High Technology Research James Katzer, NAE, ExxonMobil Research and Engineering Company and Robert Shaw, Jr., Arete Corporation. 

Tabak, S.A. et al., ExxonMobil Advances in Catalyst and Process Technology for Lubes, Mobil Catalysts Corporation of Japan, 15lh anniversary Symposium, Tokyo, Japan, November, (2000). 

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