Title:
UREA SYNTHESIS METHOD
Document Type and Number:
WIPO Patent Application WO/2023/145821
Kind Code:
A1
Abstract:
Disclosed is a urea synthesis method in which a urea synthetic liquid produced in a urea synthesis tower A is brought into contact, under heat, with at least a part of raw material carbon dioxide in a stripper C, separated mixed gas is introduced to a condenser B and condensed, and then the condensed liquid is circulated to the urea synthesis tower A, wherein the oxygen supply concentration for the raw material carbon dioxide is 100-2000 ppm, the urea synthesis pressure in the urea synthesis tower A is 125-145 bar, the urea synthesis temperature is 175°C-190°C, N/C is 3.5-4.0, and H/C is no more than 0.70.
Inventors:
YANAGAWA TAKAHIRO (JP)
KOJIMA YASUHIKO (JP)
SANO KEIJI (JP)
KOJIMA YASUHIKO (JP)
SANO KEIJI (JP)
Application Number:
PCT/JP2023/002435
Publication Date:
August 03, 2023
Filing Date:
January 26, 2023
Export Citation:
Assignee:
TOYO ENGINEERING CORP (JP)
International Classes:
C07C273/04; C07C275/00
Domestic Patent References:
| WO2014192823A1 | 2014-12-04 | |||
| WO2019198600A1 | 2019-10-17 |
Foreign References:
| JP2002145850A | 2002-05-22 | |||
| JPS6163648A | 1986-04-01 | |||
| JP2010527949A | 2010-08-19 | |||
| US20150025273A1 | 2015-01-22 | |||
| US20010041813A1 | 2001-11-15 | |||
| JPS5927863A | 1984-02-14 | |||
| JPS60146861A | 1985-08-02 |
Attorney, Agent or Firm:
ISHIBASHI, Masayuki (JP)
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