Title:
カルバミン酸アンモニウム水溶液の分析方法および未反応ガス吸収槽の運転方法
Document Type and Number:
Japanese Patent JP5564497
Kind Code:
B2
Abstract:
There are provided a method for analyzing an aqueous ammonium carbamate solution whereby the composition of an unreacted-gas absorber outlet liquid can be specified in real time, and a method for operating an unreacted gas absorber by use of the same. The method for analyzing the composition of an aqueous ammonium carbamate solution includes determining ammonia component concentration, carbon dioxide component concentration, and water concentration of the aqueous ammonium carbamate solution, which is the unreacted-gas absorber outlet liquid in a urea production process, by using a correlation among viscosity, temperature, and carbon dioxide component concentration of the aqueous solution and a correlation among density, temperature, ammonia component concentration, and carbon dioxide component concentration of the aqueous solution, wherein the ammonia component concentration is a concentration of a sum of free ammonia and equivalent ammonia of ammonium carbamate which are contained in the aqueous solution, and the carbon dioxide component concentration is a concentration of equivalent carbon dioxide of ammonium carbamate contained in the aqueous solution.
Inventors:
Eiji Sakata
Kenji Yoshimoto
Shuhei Nakamura
Kenji Yoshimoto
Shuhei Nakamura
Application Number:
JP2011515966A
Publication Date:
July 30, 2014
Filing Date:
May 12, 2010
Export Citation:
Assignee:
Toyo Engineering Corporation
International Classes:
G01N33/00; C07C273/04
Domestic Patent References:
| JP2003104949A | 2003-04-09 | |||
| JP2002145850A | 2002-05-22 |
Attorney, Agent or Firm:
Akio Miyazaki
Masaaki Ogata
Masaaki Ogata
Previous Patent: JPS5564496
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