Process for the production of gamma-butyrolactone
US5118821A · kind A · utility
2Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/617
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing gamma-butyrolactone by catalytic hydrogenation of maleic anyhydride in the liquid phase with hydrogen, at a high temperature and under pressure, in the presence of a catalyst comprising nickel and palladium deposited on a support, wherein said support is a silica based support having a very high specific surface area , the value of which may range from 50 m.sup.2 /g, preferably from about 100 m.sup.2 /g to about 800 m.sup.2 /g and more. Very high conversion rates of 90-98 mole % and excellent selectivities to gamma-butyrolactone of 95 to 97 mole % are achieved by the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.