Grace Davison

Gowan Company L.L.C., 230 Grace Company, W. R., 230 Grace Davison ProductsUnit, 230 Grain Dust, 73... 

Davison Div., W. R. Grace Co., Questions Frequently Asked About Cracking Catalyst, Grace Davison Catalagram. No. 64, 1982, p. 29. 

Dougan, T. J., Alkemade, V., Lakhampel, B and Brock, L. T., Advances in FCC Vanadium Tolerance, presented at NPRA Annual Meeting, San Antonio. Texas, March 20, 1994 reprinted in Grace Davison Catalagram No. 72, 1985. 

Figure 3-5. Comparison of activity retention between rare-earth-exchanged zeolites versus USY zeolites. (Source Grace Davison Octane Handbook.)...

Azko Private Communication, July 1997 Grace Davison Catalagram, No. 79, I9S9 J.H ielhard Catalyst Report, No, TI-H2S... 

Tenney, E. D Marsulex Environmental Technologies, FCC Cyclone Problems and How They Can Be Over Come with Current Designs presented at the Grace-Davison FCC Technology Conference, Toledo, Spain, June 3-5, 1992. 

A. W. Peters, G. Yaluris, G. D. Weatherbee, X. Zhao, Origin and Control of NOj, in the FCCU Regenerator, Grace Davison, Columbia, MD. 

Davis, K., and Ritter, R. E., FCC Catalyst Design Considerations for Resid Processing—Part 2, Grace Davison Catalagram, No. 78, 1988. 

Grace Davison Division and Research Division, W.R. Grace Co.-Conn. 

The support we received from our sponsors was much appreciated and greatly contributed to the success of the 22nd conference. On behalf of ORCS, 1 specifically thank these organizations Avantium, BASF Catalysts LLC, Eli Lilly and Company, Evonik Degussa Corporation, W.R. Grace (Davison Catalysts), Parr Instrument, Air Products, Amgen, Eastman, Umicore, Bristol-Myers Squibb, DuPont, Headwaters, HEt Lummus Technology, OMG, Seton Hall University (c/c Dr. John Sowa) and Slid Chemie. 

The hydrogenation processes were performed at a relatively low temperature and pressure in the presence of promoted Raney Ni 2400 and Raney Co 2724 catalysts (13) in this study but any common nitrile hydrogenation catalysts (e.g. Fe, Ru, Rh, bulk or supported catalysts) could be used. The advantage of using a low temperature and pressure process is that it lowers the investment cost of an industrial process. Raney Ni 2400 is promoted with Cr and Raney Co 2724 is promoted with Ni and Cr. The particle sizes for both catalysts were in the range 25 - 55 pm. The BET surface area of Raney Ni 2400 and Raney Co 2724 are 140 m2/g and 76 m2/g, respectively, and the active surface area of the Ni and Co catalysts are 52 and 18 m2/g, respectively, based on CO chemisorption (Grace Davison Raney Technical Manual, 4th Edition, 1996). 

The authors acknowledge the support of the EPSRC and the following companies, Johnson Matthey, Grace Davison, Robinson Brothers, BP-Amoco and Accelerys, as part of the Innovative Manufacturing Initiative (IMI). 

The catalysts 8% and 5% Cu/A1203 were prepared as already reported (4) by using A1203 (BET=300 m2/g, PV=1.0 ml/g) from Grace Davison. Catalytic tests were carried out in different solvents under 1 atm of H2. 

The success of the 20th Conference was greatly enhanced by financial contributions from the following organizations W. R. Grace-Davison, Parr... 

The Grace-Davison jet-cup attrition test is often used to test the friability of catalysts (e g., Weeks and Dumbill, 1990 Dessalces et al., 1994). The respective jet-cup apparatus is sketched in Fig. 5. The catalyst sample is confined to a small cup, into which air is tangentially added at a high velocity (about 150 m/s). Some authors (e.g., Dessalces et al., 1994)... 

Figure 5. Schematic drawing of the Grace-Davison jet-cup attrition test. (After Weeks and Dumbill, 1990.)...

B) Ti-Si02 Amorphous, Ti-grafted, porous silica (Grace Davison 62) 1.75 303 1.10 12.8... 

Catalytic testing. The samples were exchanged by Ce ions, then calcined at 680°C in dry air. In two types of catalytic tests, a commercial zeolitic catalyst (super D from Grace Davison) was taken as reference. 

We have been using the CPS method since it was published by Grace Davison. The method is simple, and consists of a volumetric impregnation of the catalyst followed by a cyclic ReDox deactivation in 50% steam at constant temperature. 

Gledhill, D., and Pedersen, J. Operating Experience with the New Riser Termination Technology. Grace Davison FCC Technology Conference, Lisbon, Portugal, September 1-4, 1998, Paper 14. 

FCC catalyst, supplied by Grace Davison, at three different cat-to-oil ratios, 4,6, and 8. The feed was injected at a constant rate of 3 g/min for 30 seconds. The catalyst to oil ratio was adjusted by varying the amonnt of catalyst in the reactor. Two catalysts used for this evaluation were laboratory deactivated using the cyclic propylene steaming (CPS) method [6]. Properties of these catalysts after deactivation are listed in Table 12.3. 

Materials. Methyltrioxorhenium, NH4Re04 and Re207 were purchased from Aldrich and used as received. The silica-alumina was Davicat 3113 (7.6 wt.% Al, BET surface area 573 mVg, pore volume 0.76 cmVg), provided by Grace-Davison (Columbia, MD). For reactions involving MeReOs, silica-alumina was pretreated by calcination for 12 h under 350 Torr O2 at 450°C to remove adsorbed water, hydrocarbons, and carbonates, then allowed to cool to room temperature under dynamic vacuum. The silica was Aerosil 200 (BET surface area 180 mVg, with no significant microporosity) from Degussa (Piscataway, NY). 

We thank R. Kugler and W. Wolf, Ciba Specialty Chemicals Inc., Coating Effects, Process Development, Schweizerhalle, Switzerland for assistance and helpful discussions. We thank Derek Atkinson, Grace Davison Specialty Catalysts for supply of the catalyst supports used in this study. 

Support from our sponsors greatly contributed to a successful conference. Specifically we thank these organizations W. R. Grace (Davison Catalysts), Parr Instrument, Degussa, North American Catalysis Society, ACS-PRF, Air Products and Chemicals, CRl Catalysts, Engelhard, Eli Lilly Co., Merck Co., Slid Chemie, Umicore, Amgen and Nova Molecular Technologies, Inc. 

Recently Sulzer, working with Grace Davison [35,59] and using polyimide, polysiloxane or polyurea urethane membranes, and ExxonMobil [60], using Nation or cellulose triacetate membranes, have described processes to separate sulfur compounds from various refinery streams. 

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