Davison nickel

Raney. [WJl. Grace/Davison] Nickel and nickel compound catalysts. 

DAST — (A -ethylethanaminato)trifluorosulfur (Et2NSF2), 269-270, 272 dATP, See 2 -Deoxynucleoside 5 -triphosphates Davison nickel. See Raney nickel ... 

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. 

Raney nickel is commercially available as type 28 from the Davison Chemical Division of W. R. Grace and Co. 

J Nickel complexes were checked by A. Davison, Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139. 

A sample referred to as CPS was prepared by Grace-Davison. The modification of the base catalyst was done by incipient wetness impregnation with nickel and vanadium napthenates plus 30 cycles of reduction (propylene)-oxidation treatment. 

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). 

Various Raney nickel, cobalt, and copper catalysts are still pio ided commercially by Grace Davison, who now owns the copyright, for use in both slurry reactors and fixed beds. These are often promoted with other metals, such as chromium and barium, and can be supplied in the form of powders, granules, or extrudates with a variety of pore sizes. ... 

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