Patent · US Active

High-pressure loop in a process for synthesis of urea

US8129565B2 · kind B2 · utility

1Cited by
2References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 17, 2009
Grant dateMar 6, 2012
Priority date—
Expiry dateNov 17, 2029

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB01J2219/00108
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop (1) comprises a synthesis reactor (2), a thermal stripper (3), a condenser (4), and an adiabatic CO2 stripper (10) disposed upstream said thermal stripper, separating a vapour phase (13) containing ammonia from the urea solution (9) discharged from the reactor, and recycling said vapour phase to the reactor. The adiabatic stripper (10) can be incorporated in a reactor (200) having a top reaction zone and a bottom adiabatic stripping zone. A revamping method for a conventional urea plant in accordance with the inventive process is also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.