Patent · US Expired

Process for the in-line hydrolysis of urea

US5240688A · kind A · utility

40Cited by

9References

19Claims

0Family size

Assignee

Fuel Tech, Inc. · US

Inventors

Thure von Harpe · Meerbusch, DE
Reihard Pachaly · Kerpen, DE
John E. Holfmann · Naperville, US

Key dates

Filing date	Aug 1, 1990
Grant date	Aug 31, 1993
Priority date	—
Expiry date	Aug 1, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02C20/10
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a process for the in-line hydrolysis of urea. More particularly, the process involves heating an aqueous solution of urea while flowing through a conduit to a temperature and for a time effective to hydrolyze urea to produce hydrolysis products comprising ammonium carbamate, ammonium carbonate, ammonium bicarbonate, and ammonia. The hydrolysis products are useful for the reduction of nitrogen oxides in combustion effluents without the generation of substantial amounts of nitrous oxide.

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