Process for preparing overbased calcium sulfonates
US4810396A · kind A · utility
22Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
In the preparation of an overbased calcium sulfonate, it has been found that charging calcium oxide and the total amount of water in amount of water of 20 to 25 mole % of the calcium oxide and a calcium oxide:calcium hydroxide ratio of 60:40 before carbonation improved feedstock utilization and reduced solids. Calcium hydroxide may be mixed with the calcium oxide through it takes no part in the water requirement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.