Process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol
US5258556A · kind A · utility
75Cited by
1References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 1, 1993 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Feb 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a novel process for the manufacture of 2,2,4,4 tetramethylcyclobutane 1,3 diol commencing with the pyrolysis of isobutyric anhydride to produce dimethylketene. Dimethylketene is absorbed into 2,2,4,4 tetramethylcyclobutane 1,3 dione which function as the process solvents for subsequent dimerization of the dimethylketene to 2,2,4,4-tetramethylcyclobutane-1,3 -dione followed by the catalytic hydrogenation of the dione to the diol product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.