Production of butanediol
US6969780B1 · kind B1 · utility
6Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Dec 20, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/141
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The catalytic hydrogenation of HBA and/or HMPA is improved by either or both of (1) increasing the temperature in the hydrogenation zone from about 50 to 70° C. at the inlet to above 80° C. at the outlet and (2) raising the pH of the hydrogenation feed to 4.5–6.0 before hydrogenation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.