Title:
尿素およびＵＡＳ（尿素−硫酸アンモニウム）混合物の生成のための統合されたプロセスおよびプラント
Document Type and Number:
Japanese Patent JP6983234
Kind Code:
B2
Abstract:
An integrated process for production of urea and urea-ammonium sulphate (“UAS”) comprises: a urea synthesis step carried out in a urea synthesis reactor; a recovery and concentration step, wherein a urea solution produced in the urea synthesis step is progressively concentrated in at least one recovery section and in a concentration section, recovering unreacted ammonia and carbon dioxide and water from said urea solution; a step of producing ammonium sulphate by reaction of sulphuric acid and ammonia in an ammonium sulphate production apparatus; a step of mixing said ammonium sulphate with concentrated urea coming from the concentration section to produce a UAS mixture; in the ammonium sulphate production step, at least a part of the ammonia is provided by at least one off-gas containing ammonia and recovered from the recovery and concentration step.
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Inventors:
Bruno, Lorenzo
Carlessi, Reno
Carlessi, Reno
Application Number:
JP2019524860A
Publication Date:
December 17, 2021
Filing Date:
November 16, 2017
Export Citation:
Assignee:
Cypem spear
International Classes:
C07C273/04; B04C5/04; B04C5/081; C01C1/24; C07C273/16; C07C275/02
Domestic Patent References:
| JP2016527165A |
Foreign References:
| GB844294A | ||||
| US20080092614 |
Attorney, Agent or Firm:
Shinei Patent Office