Claims
- 1. Apparatus for recovering fluorine as calcium fluoride from a fluoroetchant solution mainly composed of hydrogen fluoride and ammonium fluoride which comprises a sealed reaction tank equipped with:
- a supply means for adding the fluoroetchant solution to the tank,
- a supply means for adding calcium carbonate to the tank,
- a vapor supply means for adding steam to the tank,
- an air supply means for providing air to aerate contents of the tank,
- a stirrer for stirring the contents of the tank,
- a mist separator connected to said tank,
- an ejector downstream from said mist separator for removing vapors from the tank, and
- an exhaust port for removing calcium fluoride from the tank.
Priority Claims (3)
Number |
Date |
Country |
Kind |
3-283747 |
Oct 1991 |
JPX |
|
4-89775 |
Mar 1992 |
JPX |
|
4-146278 |
May 1992 |
JPX |
|
Parent Case Info
This is a division, of application Ser. No. 07/953,960, filed Oct. 1, 1992.
US Referenced Citations (8)
Divisions (1)
|
Number |
Date |
Country |
Parent |
953960 |
Oct 1992 |
|