Process for the production of variable amounts of DPA and aniline using only phenol and ammonia as the feedstock
US4480127A · kind A · utility
1Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1983 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | May 20, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of predetermined variable amounts of diphenylamine and aniline from a feedstock consisting essentially of phenol and ammonia is disclosed. The process involves catalytically reacting phenol and ammonia to produce aniline in situ and then reacting part of the aniline with other phenol and aniline to produce DPA, with the remaining aniline being removed from the reaction media as product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.