| (19) |
 |
|
(11) |
EP 0 053 041 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.08.1982 Bulletin 1982/31 |
| (43) |
Date of publication A2: |
|
02.06.1982 Bulletin 1982/22 |
| (22) |
Date of filing: 24.11.1981 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
24.11.1980 US 210010
12.11.1981 US 320916
|
| (71) |
Applicant: ASHLAND OIL, INC. |
|
() |
|
| (72) |
Inventors: |
|
- Carlos, Donald D.
()
- Gannon, Charles R.
()
- Wombles, Robert H.
()
|
|
| |
|
| (54) |
Processes for producing high grade asphaltic materials from low grade bituminous materials
and products resulting therefrom |
(57) Disclosed is a process for producing high grade asphaltic materials from low grade
bituminous materials and the improved products resulting therefrom. More particularly,
there is disclosed a process for preparing novel high quality paving grade asphalt
cements and novel roofing grade asphalts from poor and marginal quality bituminous
materials by passing an oxidising gas through the bituminous starting material in
the presence of a carbonate salt as catalyst, for example, sodium carbonate or bicarbonate.
Other carbonates and sesquicarbonates may also be used.