Patents Assigned to Urfa Casale S.A.
  • Process for urea production involving a carbon dioxide stripping step
    Patent number: 5792889
    Abstract: An improved process for urea production as well as a method of retrofitting a pre-existing urea plant based on the Stamicarbon process are disclosed. According to the invention, a high-yield reactor with partial removal of the reaction heat and a urea recovery section of the solution leaving the high-yield reactor, are added to the pre-existing urea plant, means being provided for recycling unreacted ammonia and carbon dioxide vapors as well as a carbamate solution obtained in the urea recovery section to the pre-existing reactor.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: August 11, 1998
    Assignee: Urfa Casale S.A.
    Inventor: Giorgio Pagani