Method for Producing Supported Raney Nickel Catalyst

Details

• Personal Author:
  Oden, Laurance L. ; Russell, James H. ; Shanker PE
• Description:
  A method for making a supported Raney nickel catalyst by coating a nickel substrate with aluminum or aluminum-nickel alloy, heat treating the coated substrate above the melting point of aluminum but below 1,133 deg C, quenching at a temperature below 854 deg C to form NiAl3 as a solid phase in the substrate. The Raney nickel alloy coating is activated in the usual manner by leaching with sodium hydroxide solution. Thus, Al pieces sufficient to form a molten pool 8 cm deep were placed in a graphite crucible and covered with an equal depth of a mixture of cryolite 50, NaCl 25, and lif 25 wt pct. The crucible was placed in an electric furnace and heated to a temperature of 1,050 deg C to melt the aluminum and salt mixture; the crucible then contained a layer of molten salt floating on the molten aluminum. Ni substrate was prepared by spot welding 16 mesh Ni screen (0.305 Mm wire) to a 0.5 Mm thick Ni sheet, using 2 welds per square inch. The screen was fastened to both sides of the Ni sheet. These pieces then were heated to 1,050 deg C by lowering them into the salt bath for 5 s. Thereafter they were lowered into the molten Al for 1 s to secure a continuous coating of Al and then raised into the molten salt bath and held there for 2.5 S for heat treatment. The specimens then were quickly transferred to a cooling molten salt bath of a eutectic mixture of 65.5 pct CaCl2 and 34.5 pct NaCl at a temperature of 700 deg C and kept there for 30 s for rapid cooling and to replace insoluble fluoride salts present. After cooling to room temperature the specimens were washed with (Abstract Truncated) [Description provided by NIOSH]
• Subjects:
  Aluminum Compounds Metals Nickel Occupational Health Safety
• Keywords:
  Aluminum-compounds Metal-compounds Metallic-compounds Metallic-salts Metallurgical-processes Metallurgy Nickel-compounds
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Other
• Place as Subject:
  Oregon ; OSHA Region 10
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-7
• NIOSHTIC Number:
  nn:10012028
• Citation:
  US Pat 4,049,580 1977 Sep; :1-7
• Federal Fiscal Year:
  1977
• Peer Reviewed:
  False
• Source Full Name:
  United States Patent 4,049,580
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:527f367440de998fefc168c1db5188b67158c9522cc7a1a3bfbaa939ba81609367e691003b3917f11873d8476a8f695e45cdc3189e607b6f893a0281f2268760
• Download URL:
  https://stacks.cdc.gov/view/cdc/220219/cdc_220219_DS1.pdf
• File Type:
  [PDF - 141.67 KB ]