Distillation process for producing a low TPP phenate
US12103908B2 · kind B2 · utility
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6References
23Claims
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Key dates
| Filing date | Mar 11, 2020 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Mar 11, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2080/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed herein is a process for preparing a sulfurized non-overbased calcium phenate detergent having a reduced content of un-sulfurized alkyl-substituted phenol and its salt. The process steps involve adding an organic solvent to the detergent, wherein the organic solvent has a boiling point of equal or above the boiling point of the un-sulfurized alkyl-substituted phenol. Distilling the organic solvent from the detergent to reduce the content of the un-sulfurized alkyl-substituted phenol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.