发明名称 |
Method of recovering ammonia |
摘要 |
A method of recovering ammonia by the distillation of an aqueous solution containing ammonia, carbon dioxide and hydrogen cyanide. The distillation is conducted using a distillation apparatus having at least its portion which comes into contact with the aqueous solution made of an alloy 1 or alloy 2. The alloy 1 contains 3% by weight or more of molybdenum, 15% by weight or more of nickel and 15% by weight or more of chromium. The alloy 2 contains 1% by weight or more of molybdenum, 9% by weight or less of nickel and 20% by weight or more of chromium. The use of the alloy 1 or alloy 2 prevents the corrosion of the distillation apparatus and enables the stable recovery of ammonia for a long period of time.
|
申请公布号 |
US7785556(B2) |
申请公布日期 |
2010.08.31 |
申请号 |
US20070925008 |
申请日期 |
2007.10.26 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
AMAKAWA KAZUHIKO;TANAKA FUMIO;SHITARA TAKUJI |
分类号 |
C01C1/10;C01C1/12;C07D333/38 |
主分类号 |
C01C1/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|