Purification of tetrahydrofuran
US4257961A · kind A · utility
4Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1980 |
| Grant date | Mar 24, 1981 |
| Priority date | — |
| Expiry date | Jun 11, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The amounts of methacrolein-, dihydrofuran-and aldehydic impurities in THF made from acetylene and formaldehyde can be significantly reduced by hydrogenating them during an interval in the multi-stage distillation THF refining procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.