| (19) |
 |
|
(11) |
EP 0 091 789 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.09.1984 Bulletin 1984/36 |
| (43) |
Date of publication A2: |
|
19.10.1983 Bulletin 1983/42 |
| (22) |
Date of filing: 07.04.1983 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
08.04.1982 US 366428
|
| (71) |
Applicant: Standard Oil Company |
|
() |
|
| (72) |
Inventor: |
|
- Stauffer, Richard Darrell
()
|
|
| |
|
| (54) |
Process for preparing overbased sulfurized phenates |
(57) Overbased sulfurized phenates formed by the process comprising contacting at reaction
conditions a composition comprising a phenolic compound, sulfur and an alkaline earth
metal base selected from the group consisting of calcium, barium, magnesium, and strontium,
in an amount insufficient to fully react with the phenolic compound, and contacting
the above intermediate composition with an additional amount of alkaline earth metal
base and carbon dioxide, wherein the molar ratio of carbon dioxide absorbed to overbasing
alkaline earth metal is from about 0.70 to about 0.95.