发明名称 |
Isolation of pure ammonia from gas mixtures containing ammonia and carbon dioxide |
摘要 |
To isolate ammonia from gas mixtures containing ammonia and carbon dioxide, the gas mixture is first partially absorbed in a solvent, with residence times of at most 0.1 second, and the non-absorbed gas is then separated from the solution obtained. The solution is then subjected to a first desorption stage, in which only the ammonia present in an excess over a molar ratio of 3 parts of ammonia to 1 part of carbon dioxide is expelled by heating, and the entrained carbon dioxide is washed out of the expelled ammonia by means of solutions containing free ammonia. The solution remaining after the first desorption stage is substantially freed from ammonia and carbon dioxide in a second desorption stage and the expelled gas, containing solvent, together with fresh gas mixture is fed to the adsorption stage, while the solvent obtained from the second desorption stage is employed for the absorption.
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申请公布号 |
US4120667(A) |
申请公布日期 |
1978.10.17 |
申请号 |
US19770841552 |
申请日期 |
1977.10.12 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
GETTERT, HANS;FROMM, HERMANN DIETER;MOLZAHN, MARTIN;SCHIER, ERNST-JUERGEN;SCHNEEHAGE, HANS HENNING |
分类号 |
B01D53/14;C01C1/12;(IPC1-7):B01D53/14 |
主分类号 |
B01D53/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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