Davison Chemical

Silica gel of mesh 60-200 was supplied by Davison Chemical Division, W. R. Grace and Company, Baltimore, Maryland, and was dried at 70° before use. The flow rate of hexane during the chromatography was 41. per hour. 

W. R. Grace Company, Davison Chemical Division, Columbia, MD 21044... 

In New York state a reprocessing plant near Buffalo began to reprocess nuclear wastes in 1966. After 6 years Nuclear Fuel Services (NFS), a subsidiary of W.R. Grace s Davison Chemical Company, abandoned the facility. There were 2 million cubic feet of radioactive material left behind along with 600,000 gallons of radioactive liquid waste that was seeping into a creek that flows into Lake Erie the source of drinking water for Buffalo. The cost of cleanup was estimated to be 1 billion. 

Caution The catalyst is extremely pyrophoric when exposed to the air in a dry condition it should be kept wet with solvent at all times. The catalyst (Raney 2800 Grade Active Nickel Catalyst in Water) is purchased from Davison Chemical, and is weighed out while it is wet. The catalyst is washed by suspension in methanol and decanted to remove water. It is further washed with ethyl acetate prior to use. The checkers obtained similar results with Raney nickel (50% slurry in water) catalyst purchased from Aldrich Chemical Company, Inc. 

The submitters used silica gel (mesh 100-200, BW-820 MH) from Fuji Davison Chemical, Ltd. (Japan). The checkers used radial chromatography (silica gel 60 PF 254 with gypsum, EM Science) with hexane/ethyl acetate (4/1) as eluent for small scale reactions. The checkers used flash chromatography (240 g of silica gel, grade 633, 47 x 61 microns, Davison Chemical) with hexane (1.5 L), hexane/ether (10/1,1.5 L), and ether (1.5 L) as eluent for large scale reactions (100 mmol). 

The author gratefully acknowledges the contributions of Drs. J. S. Magee and E. W. Albers in preparing this work, and the support of the Davison Chemical Division of W. R. 

Refrigeration-grade silica gel, 14- to 20-mesh, obtained from (he Davison Chemical Corporation, Baltimore, Maryland, was used. 

Silica gel, 60-200 mesh, was obtained from Davison Chemical Division. 

The Davison Chemical Co., Silica-Gel Division, Baltimore, Md. Editor s Note Platinized asbestos may also be used in place of platinized silica gel. 

The authors are grateful to M. P. Shatlock for the solid state NMR spectra, B. J. Rees for the ESCA work and to the Davison Chemical Division of W. R. Grace Co.-Conn. for permission to publish this work. 

The FCC process is the most common conversion unit in use today. As such, it is important to determine the performance of an FCC when feeding hydrotreated shale oil. The two 650° F+ feeds shown in Table VI were evaluated in an FCC pilot plant operating in a fixed fluidized-bed mode. The catalyst was withdrawn from an operating commercial FCC unit. It is a zeolite catalyst, CBZ-1, produced by Davison Chemical Division of W. R. Grace and Company and is moderately active as well as contaminated with metals. 

Molecular sieves 4A available from Davison Chemical Co. were used. 

Fluid grades of synthetic silica-alumina catalyst are manufactured by the American Cyanamid Company, The Davison Chemical Corporation, Morton Salt Company, and National Aluminate Corporation. At first the catalyst was dried and ground to produce the desired range of particle sizes. It was later found that by using spray driers micro-spheroidal particles of the desired size distribution could be produced directly without any grinding (7,10,145). The particle-size distribution can be altered, within limits, by changing the spray-drier conditions (145). 

Silica gel (70-200 mesh) purchased from Fuji Davison Chemical (BU-820 MH) was used. The checkers used silica gel (230-400 mesh) purchased from Merck (Kieselgel 60). 

Two U Y-zeoJite samples were used, and their composition are given in Table 1. (Na)H-USY was used as supplied by Davison Chemical Co. H-USY was prepared from (Na)H-USY by... 

Nickel catalysts (a), Raney type. The Raney Catalyst Division and the Davison Chemical Division of W. R. Grace and Co. supply an identical 50% sponge nickel catalyst prepared by the method of Raney by leaching 1 1 nickel-aluminum alloy with alkali. The catalyst is similar to the W-catalysts described in the next section. Harshaw Chem. Co. supplies similar nickel catalysts. Universal Oil Products Co. catalyst kieselguhr pellets are reduced with hydrogen and pulverized before use (.see Org. Syn., Coll. Vol., 3,278 (1955). 

The reactor was placed in the furnace and heating was initiated at least one hour before the run. Immediately after heating was initiated, 300 grams of CBZ-1 cracking catalyst (Davison Chemical Co.) was added to the reactor. Preheated nitrogen was then introduced to the reactor at a volumetric flow rate of 1.5 liters per minute. 

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