Continuous process for the manufacture of 3,5,5-trimethylcyclohexa-3-en-one(.beta.-isophorone)
US6274772A · kind A · utility
1Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2000 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Jun 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/82
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a continuous process for the manufacture of .beta.-isophorone by isomerization under homogeneous catalysis of .alpha.-isophorone. The process consists of introducing .alpha.-isophorone and a solution of an alkaline hydroxide into a reaction region at a temperature ranging from 150.degree. C. to 216.degree. C., simultaneously removing by distillation a fraction comprising an amount by weight of .beta.-isophorone ranging from 30% to 90%, drawing off the heavy products and then rectifying the fraction removed from the reaction mixture by distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.