公开(公告)号：US4120667A

公开(公告)日：1978-10-17

申请号：US841552

申请日：1977-10-12

申请人： Hans Gettert ,  Hermann Dieter Fromm ,  Martin Molzahn ,  Ernst-Juergen Schier ,  Hans Henning Schneehage

发明人： Hans Gettert ,  Hermann Dieter Fromm ,  Martin Molzahn ,  Ernst-Juergen Schier ,  Hans Henning Schneehage

IPC分类号： B01D53/14 ,  C01C1/12

CPC分类号： C01C1/12 ,  B01D53/14 ,  B01D53/1406 ,  Y02C10/06

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.

摘要翻译： 为了从含有氨和二氧化碳的气体混合物中分离氨，首先将气体混合物部分地吸收在溶剂中，停留时间至多为0.1秒，然后将非吸收气体与获得的溶液分离。 然后将溶液进行第一解吸阶段，其中只有以3份氨与1份二氧化碳的摩尔比过量存在的氨通过加热排出，并将夹带的二氧化碳从 通过含有游离氨的溶液排出氨。 在第一解吸阶段后残留的溶液在第二解吸阶段基本上不含氨和二氧化碳，并且将含有溶剂的排出气体与新鲜气体混合物一起进料到吸附阶段，而从第二解吸阶段获得的溶剂 被用于吸收。