FrankRizzo
Hazard to Others
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 203
Registered: 9-2-2004
Member Is Offline
Mood: No Mood
|
|
Trichlorotrifluoroethane
While browsing through the supply closet behind my office, I ran across a case of Freon-based tape drive cleaner which lists the contents as
Trichlorotrifluoroethane and isopropyl alcohol. The tape drives that it was used to clean are long gone, and it's probably been sitting here for
~8 years. Any novel uses come to mind?
|
|
Eclectic
National Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 899
Registered: 14-11-2004
Member Is Offline
Mood: Obsessive
|
|
It can be converted to 1,1,1,trifluoro,2,2,2,trichloroethane and hydrolized to trifluoroacetic acid. Mixed 1:1 with anhydrous isopropanol, it's
a great circuit board cleaner.
|
|
FrankRizzo
Hazard to Others
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 203
Registered: 9-2-2004
Member Is Offline
Mood: No Mood
|
|
Quote: |
Mixed 1:1 with anhydrous isopropanol, it's a great circuit board cleaner.
|
For cleaning off fluxes and such?
[Edited on 21-2-2005 by FrankRizzo]
|
|
Mr. Wizard
International Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 1042
Registered: 30-3-2003
Member Is Offline
Mood: No Mood
|
|
Was it 1,1,2-Trichloro-1,2,2-Trifluoroethane; Freon R 113? This was used as a cleaning agent in electronics, and machinery. It has a BP of 47 C.
It's getting rather scarce now, and I saw a price of over $700 on a 100 pound drum on a web site specializing in Freon recycling. How would you
rearrange it to 1,1,1-Trichloro-2,2,2-Trifluoroethane ? I think it was also used in vapor phase parts cleaning.
|
|
Eclectic
National Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 899
Registered: 14-11-2004
Member Is Offline
Mood: Obsessive
|
|
Yes, flux cleaner. The mix quickly dissolves flux without attacking most plastics.
R113 rearranges almost 100% when refluxed a few hours with certain metal chlorides. There are patents...
http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=US5430201&...
[Edited on 21-2-2005 by Eclectic]
|
|
Mr. Wizard
International Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 1042
Registered: 30-3-2003
Member Is Offline
Mood: No Mood
|
|
Obviously CCl3-CF3 gives off energy when forming, but it would seem the initial product CCl2F-CF2Cl would be the more stable, as the crowding of the
large Chlorine atoms would seem to be a problem in the final arrangement. The Fluorine must prefer it the other way though, pulling the lion's
share of the electrons to one end of the molecule.
|
|
chloric1
International Hazard
![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif) ![*](images/xpblue/star.gif)
Posts: 1099
Registered: 8-10-2003
Location: GroupVII of the periodic table
Member Is Offline
Mood: Stoichiometrically Balanced
|
|
Absorb the alcohol with barium oxide or calcium chloride, etc. and the Freon can be used as a CCl4 alternative.
Fellow molecular manipulator
|
|