Removal of acidic contaminants from tertiary butyl hydroperoxide
US5093506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D303/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The distillation product fraction obtained from an isobutane oxidation reaction product after the removal of unreacted isobutane will contain tertiary butyl hydroperoxide, tertiary butyl alcohol and carboxylic acid contaminants such as formic acid, acetic acid and isobutyric acid. It has been discovered that when the distillation product fraction is treated with about 1/2 to 1 equivalents of calcium oxide and/or calcium hydroxide based on the carboxylic acid content of the distillate product fraction, a portion of the carboxylic acid contaminants will precipitate thus partially purifying the distillation product fraction so that, thereafter, molybdenum precipitation will be substantially inhibited when the thus-treated distillation product fraction is used as a feedstock for an epoxidation reaction wherein tertiary butyl hydroperoxide is reacted with an olefin in the presence of a soluble molybdenum catalyst to provide an olefin epoxide and additional tertiary butyl hydroperoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.