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1.发明授权Process of recovering unreacted ammonia from a urea synthesis melt by a two stage rectification operation 失效通过二级整流操作从尿素合成熔体中回收未反应的氨的方法
公开(公告)号：US3114681A
公开(公告)日：1963-12-17
申请号：US73540858
申请日：1958-05-15
Applicant: STAMICARBON
Inventor： BIEKART HENDRIK J B , TEUNIS BAKKER , KAASENBROOD PETRUS J C
IPC: C01C1/12 , C07C273/04
CPC classification number: C07C273/04 , C01C1/12
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