Production of sulfonated amines
US4681710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1985 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Mar 22, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C309/46
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of sulfonated aromatic amines starting with the corresponding aromatic amine sulfate salt which employes a rotating reactor in which there is maintained a rapidly moving heated cascading bed of solid particles composed largely of the final product whose temperature is above or brought above the rearrangement temperature. The reactants are fed to the bed at such a rate that the cascading movement of the bed is unaffected. The heat imparted to the amino hydrogen sulfate within the bed by the surrounding particles orient the desired rearrangement to take place along with the vaporization and elimination of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.