Recovery of tertiary butyl hydroperoxide and tertiary butyl alcohol
US4977285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Dec 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A heavy distillation fraction comprising tertiary butyl hydroperoxide, tertiary butyl alcohol, impurities and dissolved molybdenum catalyst resulting from the removel of propylene, propylene oxide and tertiary butyl alcohol from an epoxidation reaction product is mixed with about 5 to about 10 wt. %, based on the weight of the heavy liquid distilation fraction, of a lower aliphatic alcohol containing from 1 to 3 carbon atoms to provide a charge mixture, and the charge mixture is: PA0 charged to a falling film evaporator and separator therein, under evaporator operating conditions including a temperature within the range of about 20.degree. to about 150.degree. C. and a pressure of about 1 to about 200 mm Hg., into an overhead vaporized fraction comprising substantially all of the aliphatic alcohol and from about 80 to about 95 wt. % of the heavy distillation fraction charged to the falling film evaporator. The practice of the present invention will also provide a clear liquid falling film evaporator residue fraction comprising tertiary butyl hydroperoxide, tertiary butyl alcohol, substantially all of the molybdenum contained in the heavy liquid fraction, and impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.