The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2017
Filed:
Feb. 10, 2012
Ermanno Filippi, Castagnola, CH;
Marco Badano, Como, IT;
Federico Zardi, Breganzona, CH;
Andrea Scotto, Breganzona, CH;
Ermanno Filippi, Castagnola, CH;
Marco Badano, Como, IT;
Federico Zardi, Breganzona, CH;
Andrea Scotto, Breganzona, CH;
Casale SA, , CH;
Abstract
A process for ammonia-urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia () obtaining a cooled liquid ammonia stream (), separating a gaseous fraction () comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia () at a high pressure, and reheating said purified liquid ammonia () after separation of said gaseous fraction, obtaining a reheated purified ammonia () having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia-urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia-urea plants.