Chemistry Reference
In-Depth Information
carboxylic acids and sulfonic acids, are useful as
detergents and lubricants.
(8.5)
(8.6)
(8.7)
The reaction mechanism has been discussed for
many years [8-11]. One mechanism involves
anodically generated fluorine radical as the vital
reagent for perfluorination and another
involves electrogenerated highly oxidized nickel
fluorides such as Ni
2
F
5
, NiF
3
and NiF
4
on a
nickel anode surface. These act as fluorinating
reagents and are electrochemically regenerated
at the nickel anode. During the electrolysis,
partially fluorinated products have polarity and
they stay in the electrolyte to be subjected to
further electrolysis.
The final perfluorinated products are non-polar
and their specific density is very high, therefore
they precipitate from liquid HF onto the cell
bottom as a liquid.
The electrochemical perfluorination process
now runs on a large scale at 3M in the USA and
at the Central Glass Company and the
Mitsubishi Materials Electronic Chemicals
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