Continuous process for conversion of dimethyldicyclopentadiene to endo-dimethyldicyclopentadiene, a missile fuel
US4177217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1977 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Sep 28, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/68
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Dimethyldicyclopentadiene is continuously hydrogenated to tetrahydrodimethyldicyclopentadiene and then the latter is continuously isomerized to a missile fuel. Both the hydrogenation and the isomerization steps use a nickel on silica-alumina catalyst. The temperature of the hydrogenation is in the range of about 70.degree.-260.degree. C., and the temperature of the isomerization is in the range of about 200.degree.-280.degree. C. The space velocity of the hydrogenation is about 0.1 to about 2.0 volumes of the diene charged per volume of catalyst per hour and the space velocity of the isomerization is about 0.1 to about 3.0 volumes of the hydrocarbon charged per volume of catalyst per hour. The pressure range for hydrogenation is between about 200 psig to about 3000 psig and for isomerization between from about 10 psig to about 1500 psig. Hydrogen is present during the isomerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.