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1. 发明申请

US20090069597A1 Method for concentrating an aqueous ammonium carbamate stream 有权
标题翻译：浓缩氨基甲酸铵水溶液流的方法
公开(公告)号：US20090069597A1
公开(公告)日：2009-03-12
申请号：US11919991
申请日：2006-05-15
申请人： Johannes Henricus J.H. Mennen , Tjay Tjien T.T Tjioe
发明人： Johannes Henricus J.H. Mennen , Tjay Tjien T.T Tjioe
IPC分类号： C07C269/00 , B01D3/00
CPC分类号： C07C273/12
摘要： The invention relates to a method for concentrating an aqueous ammonium carbamate stream, which has been formed in a process for the preparation of urea, has a pressure between 0.20 MPa and 0.9 MPa, a temperature between 35° C. and 95° C., and contains at least 25 wt. % H2O, comprising: a pressure increase step, in which the aqueous ammonium carbamate stream is increased in pressure to a pressure between 1.0 MPa and 7 MPa; a condensation step, in which the aqueous ammonium carbamate stream is contacted with a gas stream, which has been formed in a process for the preparation of melamine and which consists essentially of NH3, CO2 and optionally H2O and has a lower H2O content than the aqueous ammonium carbamate stream, the gas stream being absorbed in the aqueous ammonium carbamate stream in such a way that a concentrated ammonium carbamate stream is formed that contains between 15 and 35 wt. % H2O; a discharge step, in which the concentrated ammonium carbamate stream is separated and discharged.
摘要翻译：本发明涉及一种浓缩在制备尿素的方法中形成的氨基甲酸铵水溶液流的方法，其压力在0.20MPa和0.9MPa之间，温度在35℃和95℃之间，并含有至少25wt。％H 2 O，包括：加压步骤，其中氨基甲酸铵水溶液流的压力升高至1.0MPa和7MPa之间的压力; 缩合步骤，其中氨基甲酸铵水溶液流与气流形成接触，气流在制备三聚氰胺的方法中形成，其基本上由NH 3，CO 2和任选的H 2 O组成，并且具有比水的更低的H 2 O含量氨基甲酸铵流，气流被吸收在氨基甲酸铵水溶液流中，使得形成含有15至35重量％的氨基甲酸铵浓缩物流。％H2O; 排出步骤，其中浓氨基甲酸铵流分离和排出。

2. 发明申请

US20080119650A1 Process For The Preparation Of Melamine 有权
标题翻译：三聚氰胺的制备方法
公开(公告)号：US20080119650A1
公开(公告)日：2008-05-22
申请号：US11883384
申请日：2006-01-31
申请人： Johannes Henricus J.H. Mennen
发明人： Johannes Henricus J.H. Mennen
IPC分类号： C07D251/60 , B01D3/00
CPC分类号： C07D251/60
摘要： The invention is directed to a process for the preparation of melamine connected through a carbamate concentration unit, comprising a desorption column in which a gas stream, comprising ammonia, carbon dioxide and water is generated, with a process for the preparation of urea, comprising a heat exchanger wherein a urea containing stream is present, wherein the gas stream, comprising ammonia, carbon dioxide and water, is send to the heat exchanger, wherein heat is exchanged with the urea containing stream and the gas stream, comprising ammonia, carbon dioxide and water is cooled and at least partially condensed to obtain an ammonium carbamate solution that is send to the process for the preparation of urea.
摘要翻译：本发明涉及一种制备通过氨基甲酸酯浓缩单元连接的三聚氰胺的方法，其包括解吸塔，其中产生包含氨，二氧化碳和水的气流与制备尿素的方法，包括其中存在含尿素流的热交换器，其中包含氨，二氧化碳和水的气流被送到热交换器，其中热量与含尿素流和气流交换，其包括氨，二氧化碳和水被冷却并且至少部分冷凝，得到氨基甲酸铵溶液，其被送到制备尿素的方法中。

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