发明名称 |
Apparatus for recovering calcium fluoride from fluoroetchant |
摘要 |
Fluorine is recovered as calcium fluoride from a fluoroetchant solution composed mainly of hydrogen fluoride and ammonium fluoride using a sealed reaction tank equipped with a supply port for adding the fluoroetchant solution to the tank, a supply port for adding calcium carbonate to the tank, a vapor supply port for adding steam to heat the solution in the tank, an air supply port for providing air to aerate the contents of the tank, a stirrer for stirring the contents of the tank, an ejector for removing vapors from the tank connected to the tank via a mist separator for separating mist from the vapors being removed from the tank, and an exhaust port for removing calcium fluoride from the tank.
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申请公布号 |
US5382423(A) |
申请公布日期 |
1995.01.17 |
申请号 |
US19930070293 |
申请日期 |
1993.06.02 |
申请人 |
HITACHI PLANT ENGINEERING & CONSTRUCTION CO., LTD. |
发明人 |
OHMI, TADAHIRO;HARADA, HIROYUKI;MIKI, NOBUHIRO;FUKUTOME, TOSHIRO;MAENO, MATAGORO;TERASAWA, NORIO;ETO, YOSHIHIRO;SAKATA, MASAHIRO |
分类号 |
C01F11/22;(IPC1-7):F28D21/00 |
主分类号 |
C01F11/22 |
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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