| (19) |
 |
|
(11) |
EP 0 055 508 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.03.1983 Bulletin 1983/11 |
| (43) |
Date of publication A2: |
|
07.07.1982 Bulletin 1982/27 |
| (22) |
Date of filing: 13.10.1981 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
30.12.1980 US 221184
|
| (71) |
Applicant: THE STANDARD OIL COMPANY |
|
() |
|
| (72) |
Inventors: |
|
- Kiikka, Oliver Adneil
()
- Connors, Keith Allan
()
|
|
| |
|
| (54) |
Reduction of reactivity in coke |
(57) Carbon dioxide and air reactivity reactions which occur during carbon electrode use,
are reduced by treating the coke used to make the electrode after calcination with
water containing a monomeric, dimeric or polymeric-phosphoric acid, or a salt thereof.
A representative acid is orthophosphoric acid.