Process for preparing an overbased salt of a sulfurized alkyl-substituted hydroxyaromatic composition
US9062271B2 · kind B2 · utility
1Cited by
34References
9Claims
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Key dates
| Filing date | Oct 30, 2013 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Oct 30, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is an overbased salt of a sulfurized alkyl-substituted hydroxyaromatic composition, which is prepared by the process comprising (a) providing an overbased salt of a sulfurized alkyl-substituted hydroxyaromatic composition having a total base number (TBN) greater than about 250; and (b) sparging the overbased salt of a sulfurized alkyl-substituted hydroxyaromatic composition with air at a temperature ranging from about 190° C. to about 250° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.