Method for preparing lactam
US6262259A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Oct 28, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention includes a process for the preparation of a lactam by vapor phase reaction of an aliphatic aminonitrile with water in the presence of a solid catalyst, wherein the catalyst is an alumina having a specific surface, measured by the BET method, greater than or equal to 10 m.sup.2 /g. The alumina catalyst is further characterized by either: (a) a specific surface less than or equal to 280 m.sup.2 /g, and a volume of pores with a diameter greater than 500 .ANG. which is greater than or equal to 10 ml/100 g; or (b) a specific surface greater than or equal to 50 m.sup.2 /g and less than or equal to 280 m.sup.2 /g, and a volume of pores with a diameter greater than 70 .ANG. which is greater than or equal to 30 m.sup.2 /g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.