U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Process for converting urea into ammonia

Patent 6471927 Issued on October 29, 2002. Estimated Expiration Date: Icon_subject February 5, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Preparation of hydrogen cyanide
Patent #: 5393393
Issued on: 02/28/1995
Inventor: Wan, et al.

Apparatus and process for the preparation of hydrogen cyanide Patent #: 5470541
Issued on: 11/28/1995
Inventor: Koch, et al.

Inventors

Assignee

Application

No. 776952 filed on 02/05/2001

US Classes:

423/239.1, Utilizing solid sorbent, catalyst, or reactant423/358From organic material containing nitrogen

Examiners

Primary: Langel, Wayne A.
Assistant: Medina, Maribel

Attorney, Agent or Firm

Foreign Patent References

  • 40 38 054 DE 06/12/1992
  • 44 25 420 DE 07/12/1995
  • 195 10 804 DE 06/12/1996
  • 0 487 886 EP 06/12/1992
  • 0 582 022 EP 02/12/1994
  • 2 684 376 FR 06/12/1993

International Classes

B01D 053/54
C01C 001/08

Foreign Application Priority Data

1998-08-03 DE

Abstract

A microwave hydrolysis reactor for converting urea into ammonia has one or more reaction chambers into which a urea solution is fed via a feed device and a discharge device for discharging an ammonia-water mixture. A catalytic converter is arranged in the reaction chamber. A microwave-transmitting device allows irradiating so that energy is fed to the urea solution in the reaction chamber.

Other References

  • Apfelbaum et al.: "25--Benzene, Its Derivatives, and Condensed Benzenoid Compounds", Chemical Abstracts, vol. 123, 199
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