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Title:
尿素水の製造方法、尿素水からトリウレットを除去する方法、及び、水溶液からトリウレットを回収する方法。
Document Type and Number:
Japanese Patent JP5409948
Kind Code:
B1
Abstract:
Provided is a method of efficiently removing triuret from urea water, a method of producing urea water of high purity and a method of collecting triuret from aqueous solution. Thus, a method of producing urea water comprises a step of preparing urea water by dissolving urea water in water, a step of making the urea water cloudy in a temperature range of -5°C or more and 17°C or less and a step of passing the urea water in a cloudy state through an ion exchange resin. Moreover, a method of removing triuret from urea water comprises a step of precipitating the triuret by cooling the urea water including urea and triuret as impurity in a temperature range of -5°C or more and 17°C or less and a step of passing the urea water in the temperature range through an ion exchange resin and capturing the precipitated triuret within the ion exchange resin.

Inventors:
Eiichi Ino
Application Number:
JP2013137648A
Publication Date:
February 05, 2014
Filing Date:
June 29, 2013
Export Citation:
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Assignee:
Opti Co., Ltd.
International Classes:
C07C273/14; C07C275/00
Domestic Patent References:
JP2000281638A2000-10-10
JP2010280596A2010-12-16
JP2012219040A2012-11-12
JPS49135924A1974-12-27
JP2000281638A2000-10-10
JP2010280596A2010-12-16
JP2012219040A2012-11-12
Attorney, Agent or Firm:
Masayoshi Takahashi