Process for production of cresols
US5600026A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Feb 23, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C409/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas, thereby obtaining a solution of oxygenation products containing tertiary and primary hydroperoxides of cymene; (b) reacting the solution of oxygenation products obtained in the step (a) with an organic quaternary ammonium salt and an alkali, or with an organic quaternary ammonium hydroxide, thereby decreasing the content of primary hydroperoxide; (c) subjecting the reaction mixture in the step (b) to decomposition in the presence of a catalyst; and (d) subjecting the decomposition mixture in the step (c) to hydrogenation, thereby obtaining the desired cresols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.