3681931

Information

• Patent Grant
• 3681931

• References
• Source

• Patent Number

  3,681,931

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1972
  52 years ago

• CPC

  • C05B11/06 - using nitric acid (nitrophosphates)
  • B03B1/00 - Conditioning for facilitating separation by altering physical properties of the matter to be treated
  • C01B3/16 - using catalysts
  • C01B25/32 - Phosphates of magnesium, calcium, strontium, or barium
  • C01B33/183 - by oxidation or hydrolysis in the vapour phase of silicon compounds such as halides, trichlorosilane, monosilane
  • C02F11/00 - Treatment of sludge Devices therefor
  • C02F11/20 - by freezing
  • B03D1/021 - for treatment of phosphate ores

• US Classifications

  • 062 - Refrigeration
  • 423 - Chemistry of inorganic compounds
  • 516 - Colloid systems and wetting agents