| (19) |
 |
|
(11) |
EP 0 244 902 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
11.01.1989 Bulletin 1989/02 |
| (43) |
Date of publication A2: |
|
11.11.1987 Bulletin 1987/46 |
| (22) |
Date of filing: 23.04.1987 |
|
| (51) |
International Patent Classification (IPC)4: C10L 1/32 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR LI LU NL SE |
| (30) |
Priority: |
02.05.1986 IT 2029586
|
| (71) |
Applicant: ENIRICERCHE S.p.A. |
|
I-20121 Milan (IT) |
|
| (72) |
Inventors: |
|
- Meli, Salvatore
I-20067 Paullo
Milan (IT)
- Passarini, Nello
I-20060 Colturano
Milan (IT)
- Vettor, Antonio
I-20097 San Donato Milanese
Milan (IT)
|
| (74) |
Representative: Roggero, Sergio (IT) et al |
|
Ing. Barzanò & Zanardo S.p.A.
Via Borgonuovo 10
I-20121 Milano
I-20121 Milano (IT) |
|
| |
|
| (54) |
Aqueous slurry of coal and related preparation processes |
(57) An aqueous slurry of coal is disclosed, together with the related processes for producing
it, said aqueous coal slurry having a concentration comprised within the range of
from 60 to 80% by weight and containing a polyelectrolyte selected from the monovalent
cation salts of polymerized naphthalenesulphonic acids, the characteristic of such
a slurry consisting in that on the surface of coal, constituted by particles with
a granulometry not greater than 300 µm, a heavy liquid is present, which is obtained
by means of the distillation of pit coal tar, or a fuel oil deriving from mineral
oil, in an amount comprised within the range of from 0.1 to 2% by weight relatively
to same coal.