Invention Grant
- Patent Title: Separating ammonia from offgas obtained in the synthesis of melamine
- Patent Title (中): 从合成梅洛胺中获得的废弃物分离氨
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Application No.: US3555784DApplication Date: 1968-12-02
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Publication No.: US3555784APublication Date: 1971-01-19
- Inventor: MOHR RUDOLF
- Applicant: BASF AG
- Assignee: Basf Ag
- Current Assignee: Basf Ag
- Priority: DE1670290 1967-12-01
- Main IPC: C01B21/12
- IPC: C01B21/12 ; C01C1/12 ; B01D19/00
Abstract:
TO SEPARATE AMMONIA FROM OFFGAS OBTAINED IN THE SYNTHESIS OF MELAMINE FROM UREA, THE OFFGAS, AFTER MELAMINE HAS BEEN SEPARATED, IS TREATED WITH A MELT WHICH CONTAINS AMMONIUM NITRATE AND/OR AMMONIUM THIOCYANATE AND/OR UREA. TEMPERATURES WHICH ARE BETWEEN THE BOILING POINT OF AMMONIA AND THE DECOMPOSITION TEMPERATURE OF AMMONIUM CARBAMATE ARE MAINTAINED IN THE TREATMENT.
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