Alkyl phenol stabilizer compositions for fuels and lubricants
US5024775A · kind A · utility
11Cited by
11References
13Claims
0Family size
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Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/17
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Liquid mixtures of alkyl phenols composed of from 1 to 8 wt % 2-tert-butylphenol; from 4 to 12 wt % of 2,6-di-tert-butylphenol; from 4 to 12 wt % of 2-tri-tert-butylphenol; and from 65 to 80 wt % of 2,6-di-tert-butyl-4-n-butylphenol have a balance of properties rendering them ideally suited for use as stabilizers for middle distillate fuels. Such mixtures can be readily produced by an aldehyde-catalyzed alkylation procedure using n-butanol, an appropriate mixture of tertiary butylated phenols, and a strong base (e.g., NaOH, KOH, etc.).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.