Urea Per Se Or Salt Thereof Patents (Class 564/63)
Preparing directly from cyano containing compound (Class 564/64)
Preparing directly from ammonia and carbonmonoxide or carbon oxysulfide (e.g., from ammonia and cos, etc.) (Class 564/65)
Preparing directly from ammonium carbamate (i.e., from hnh-coo-hhnhh) (Class 564/66)
Preparing directly from ammonia and carbon dioxide (Class 564/67)
Purification or recovery (Class 564/73)
  • Process for making liquid fertilizer
    Patent number: 4310343
    Abstract: A new improved process for making liquid fertilizer having a high nitrogen and sulfur content has been developed in which urea and sulfuric acid are mixed. Exothermic heat, which normally builds up in successive reactions is dissipated via use of a non-reactive, nutritive heat sink, preferably comprising a predetermined amount of previously produced fertilizer.
    Type: Grant
    Filed: November 27, 1979
    Date of Patent: January 12, 1982
    Assignee: Verdegaal Bros. Fertilizer
    Inventors: William J. Verdegaal, George F. Verdegaal
  • Process for producing methanol
    Patent number: 4277416
    Abstract: A system for processing coal to produce methanol, alcohol-slurry coal for transport, electric power and urea. Raw coal is graded. The downgraded fraction is gasified, producing steam and synthesis gas. The synthesis gas is converted to methanol which is then used to slurry upgraded coal for transport or to produce electric power. The steam output of the gasifier drives an oxygen generator to produce oxygen for the gasifier, when the synthesis gas is used to produce methanol, and also drives an electric power turbine. Natural gas may be used to maximize methanol production. Urea is a by-product.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: July 7, 1981
    Assignee: Aminoil, USA, Inc.
    Inventor: Norman A. Grant