Naphthenic acid amides
US4935542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of producing naphthenic acid having the formula ##STR1## where R.sub.1 is H or Me, PA0 X is chosen, at each occurrence, from O or NH, and PA0 n is a small whole number of from 1-10, which comprises reacting an amine of the formula ##STR2## where R.sub.1 is H or Me, PA0 X is chosen, at each occurrence, from O or NH, and PA0 n is a small whole number of from 1-10, with a petroleum fraction containing naphthenic acids to form a salt and then heating the petroleum fraction containing the naphthenic acid-amine salt to a temperature of at least 25.degree. F. greater than the boiling point of water for a time sufficient to convert the amine salts to the amides and then recovering the thus produced amides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.