Process for overbasing sulfonates comprising two separate additions of calcium oxide
US5108630A · kind A · utility
4Cited by
11References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 10, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Oct 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In an overbased sulfonate process calcium hydroxide is formed in situ. The entire water charge and 30 to 50% of the calcium oxide is added. The temperature exotherm is observed. When the temperature ceases to rise, the remaining calcium hydroxide is added with temperature adjustment and carbonation is begun.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.